tpa2013d1

7/31/2019 tpa2013d1

1/30

1

F E A T U R E S A P P L I C A T I O N S

D E S C R I P T I O N

VDD SW

IN

IN+

AGND PGND

VOUT+

VOUT

V OUTCC V INCC

10 Fm

22 Fm

1 Fm

ToBattery

DifferentialInput

CIN

CIN

V FBCC

SDb

SDd

ShutDownBoost

ShutDownClassD

GAINGain(V /Float/GND)CC

2.2to6.2 Hm

GPIO

1 Fm

R150k

R2500k

TPA2013D1

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7 w w w . t i . c o m

2 . 7 - W C O N S T A N T O U T P U T P O W E R C L A S S - D A U D I O A M P L I F I E R W I T H I N T E G R A T E D

B O O S T C O N V E R T E R

C e l l P h o n e s H i g h E f f i c i e n c y I n t e g r a t e d B o o s t C o n v e r t e r ( O v e r 9 0 % E f f i c i e n c y ) P D A

G P S 2 . 2 - W i n t o a n 8 - L o a d f r o m a 3 . 6 - V S u p p l y

P o r t a b l e E l e c t r o n i c s 2 . 7 - W i n t o a n 4 - L o a d f r o m a 3 . 6 - V S u p p l y

O p e r a t e s f r o m 1 . 8 V t o 5 . 5 V

E f f i c i e n t C l a s s - D P r o l o n g s B a t t e r y L i f e T h e T P A 2 0 1 3 D 1 i s a h i g h e f f i c i e n c y C l a s s - D a u d i o

I n d e p e n d e n t S h u t d o w n f o r B o o s t C o n v e r t e r p o w e r a m p l i f i e r w i t h a n i n t e g r a t e d b o o s t c o n v e r t e r . I t

a n d C l a s s - D A m p l i f i e r d r i v e s u p t o 2 . 7 W ( 1 0 % T H D + N ) i n t o a 4 s p e a k e r .

D i f f e r e n t i a l I n p u t s R e d u c e R F C o m m o n N o i s e W i t h 8 5 % t y p i c a l e f f i c i e n c y , t h e T P A 2 0 1 3 D 1 h e l p s e x t e n d b a t t e r y l i f e w h e n p l a y i n g a u d i o . B u i l t - i n I N P U T L o w P a s s F i l t e r D e c r e a s e s R F

a n d O u t o f B a n d N o i s e S e n s i t i v i t y T h e b u i l t - i n b o o s t c o n v e r t e r g e n e r a t e s t h e v o l t a g e r a i l

S y n c h r o n i z e d B o o s t a n d C l a s s - D E l i m i n a t e s f o r t h e C l a s s - D a m p l i f i e r . T h i s p r o v i d e s a l o u d e r B e a t F r e q u e n c i e s a u d i o o u t p u t t h a n a s t a n d - a l o n e a m p l i f i e r c o n n e c t e d

d i r e c t l y t o t h e b a t t e r y . I t a l s o m a i n t a i n s a c o n s i s t e n t T h e r m a l a n d S h o r t - C i r c u i t P r o t e c t i o n l o u d n e s s , r e g a r d l e s s o f b a t t e r y v o l t a g e . A d d i t i o n a l l y ,

A v a i l a b l e i n 2 . 2 7 5 m m x 2 . 2 7 5 m m 1 6 - b a l l t h e b o o s t c o n v e r t e r c a n b e u s e d t o s u p p l y e x t e r n a l W C S P a n d 4 m m x 4 m m 2 0 - L e a d Q F N d e v i c e s . P a c k a g e s

T h e T P A 2 0 1 3 D 1 h a s a n i n t e g r a t e d l o w p a s s f i l t e r t o 3 S e l e c t a b l e G a i n S e t t i n g s o f 2 V / V , 6 V / V , a n d i m p r o v e R F r e j e c t i o n a n d r e d u c e o u t - o f - b a n d n o i s e ,

1 0 V / V i n c r e a s i n g t h e s i g n a l t o n o i s e r a t i o ( S N R ) . A b u i l t - i n P L L s y n c h r o n i z e s t h e b o o s t c o n v e r t e r a n d C l a s s - D s w i t c h i n g f r e q u e n c i e s , t h u s e l i m i n a t i n g b e a t f r e q u e n c i e s a n d i m p r o v i n g a u d i o q u a l i t y . A l l o u t p u t s a r e f u l l y p r o t e c t e d a g a i n s t s h o r t s t o g r o u n d , p o w e r s u p p l y , a n d o u t p u t - t o - o u t p u t s h o r t s .

1

P l e a s e b e a w a r e t h a t a n i m p o r t a n t n o t i c e c o n c e r n i n g a v a i l a b i l i t y , s t a n d a r d w a r r a n t y , a n d u s e i n c r i t i c a l a p p l i c a t i o n s o f T e x a s I n s t r u m e n t s s e m i c o n d u c t o r p r o d u c t s a n d d i s c l a i m e r s t h e r e t o a p p e a r s a t t h e e n d o f t h i s d a t a s h e e t .

P R O D U C T I O N D A T A i n f o r m a t i o n i s c u r r e n t a s o f p u b l i c a t i o n d a t e . C o p y r i g h t 2 0 0 7 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d P r o d u c t s c o n f o r m t o s p e c i f i c a t i o n s p e r t h e t e r m s o f t h e T e x a s I n s t r u m e n t s s t a n d a r d w a r r a n t y . P r o d u c t i o n p r o c e s s i n g d o e s n o t

n e c e s s a r i ly i n c l u d e t e s t i n g o f a l l p a r a m e t e r s .
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PWMand

LevelShifter

H-Bridge

Internal

Oscillator

Biases, Control,and

References

Regulator

VmaxControl

GateControl

Anti-Ringing

PGND

AGND

BGControl

PGNDAGND

V OUTCC

Vref

AGND

IN+

IN

SDb

VDD

SW

V OUTCC

V FBCC

V INCC

VOUT+

VOUT

PGND

SDd

Res.Array

GAIN

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

F u n c t i o n a l B l o c k D i a g r a m

T a b l e 1 . B O O S T C O N V E R T E R M O D E C O N D I T I O N

C A S E O U T P U T C U R R E N T M O D E O F O P E R A T I O N

VD D < VC C L o w C o n t i n u o u s ( f i x e d f r e q u e n c y )

VD D < VC C H i g h C o n t i n u o u s ( f i x e d f r e q u e n c y )

VD D VC C L o w D i s c o n t i n u o u s ( v a r i a b l e f r e q u e n c y )

VD D VC C H i g h D i s c o n t i n u o u s ( v a r i a b l e f r e q u e n c y )

T a b l e 2 . D E V I C E C O N F I G U R A T I O N B o o s t C l a s s D

S D b S D d C o m m e n t s C o n v e r t e r A m p l i f i e r

l o w l o w O F F O F F D e v i c e i s i n s h u t d o w n m o d e I q 1 A

B o o s t c o n v e r t e r i s o f f . C l a s s - D A u d i o P o w e r A m p l i f i e r ( A P A ) c a n b e d r i v e n b y a n l o w h i g h O F F O N

e x t e r n a l p a s s t r a n s i s t o r c o n n e c t e d t o t h e b a t t e r y .

h i g h l o w O N O F F C l a s s - D A P A i s o f f . B o o s t C o n v e r t e r i s o n a n d c a n b e u s e d t o d r i v e a n e x t e r n a l d e v i c e .

B o o s t c o n v e r t e r a n d C l a s s - D A P A a r e o n . N o r m a l o p e r a t i o n . B o o s t c o n v e r t e r c a n b e h i g h h i g h O N O N u s e d t o d r i v e a n e x t e r n a l d e v i c e i n p a r a l l e l t o t h e C l a s s - D A P A w i t h i n t h e l i m i t s o f t h e

b o o s t c o n v e r t e r o u t p u t c u r r e n t .

C o p y r i g h t 2 0 0 7 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 3

P r o d u c t F o l d e r L i n k ( s ) : T P A 2 0 1 3 D 1
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A B S O L U T E M A X I M U M R A T I N G S

D I S S I P A T I O N R A T I N G S

A V A I L A B L E O P T I O N S

R E C O M M E N D E D O P E R A T I N G C O N D I T I O N S

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

o v e r o p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e ( u n l e s s o t h e r w i s e n o t e d ) ( 1 )

V A L U E U N I T

VD D

S u p p l y v o l t a g e 0 . 3 t o 6 V

VI I n p u t v o l t a g e , V i : S D b , S D d , I N + , I N , V C CF B 0 . 3 t o V D D + 0 . 3 V

C o n t i n u o u s t o t a l p o w e r d i s s i p a t i o n S e e D i s s i p a t i o n R a t i n g T a b l e

TA O p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e 4 0 t o 8 5 C

TJ O p e r a t i n g j u n c t i o n t e m p e r a t u r e r a n g e 4 0 t o 1 5 0 C

Ts t g S t o r a g e t e m p e r a t u r e r a n g e 6 5 t o 1 5 0 C

( 1 ) S t r e s s e s b e y o n d t h o s e l i s t e d u n d e r a b s o l u t e m a x i m u m r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . T h e s e a r e s t r e s s r a t i n g s o n l y , a n d f u n c t i o n a l o p e r a t i o n s o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s b e y o n d t h o s e i n d i c a t e d u n d e r r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s i s n o t i m p l i e d . E x p o s u r e t o a b s o l u t e - m a x i m u m - r a t e d c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y .

P A C K A G E T A 2 5 C D E R A T I N G F A C T O R ( 1 ) TA = 7 0C TA = 8 5 C

1 6 b a l l W C S P 1 . 5 W 1 2 . 4 m W / C 1 W 0 . 8 W

2 0 p i n Q F N 2 . 5 W 2 0 . 1 m W / C 1 . 6 W 1 . 3 W

( 1 ) D e r a t i n g f a c t o r m e a s u r e d w i t h J E D E C H i g h K b o a r d .

TA P A C K A G E D D E V I C E S ( 1 ) P A R T N U M B E R S Y M B O L

1 6 - b a l l , 2 . 2 7 5 m m 2 . 2 7 5 m m W C S P T P A 2 0 1 3 D 1 Y Z H B T H

( 0 . 0 5 m m t o l e r a n c e ) 4 0C T O 8 5 C

2 0 - p i n , 4 m m 4 m m Q F N T P A 2 0 1 3 D 1 R G P ( 2 ) B T I

( 1 ) F o r t h e m o s t c u r r e n t p a c k a g e a n d o r d e r i n g i n f o r m a t i o n , s e e t h e P a c k a g e O p t i o n A d d e n d u m a t t h e e n d o f t h i s d o c u m e n t , o r s e e t h e T I w e b s i t e a t w w w . t i . c o m .

( 2 ) T h e R G P p a c k a g e i s o n l y a v a i l a b l e t a p e d a n d r e e l e d . T o o r d e r , a d d s u f f i x R t o t h e e n d o f t h e p a r t n u m b e r f o r a r e e l o f 3 0 0 0 ( e . g . , T P A 2 0 1 3 D 1 R G P R ) .

M I N M A X U N I T

VD D S u p p l y v o l t a g e 1 . 8 5 . 5 V

VI H H i g h - l e v e l i n p u t v o l t a g e S D b , S D d 1 . 3 V

VI L L o w - l e v e l i n p u t v o l t a g e S D b , S D d 0 . 3 5 V

| II H | H i g h - l e v e l i n p u t c u r r e n t S D b = S D d = 5 . 8 V , V D D = 5 . 5 V , V C C = 5 . 5 V 1 A

| II L | L o w - l e v e l i n p u t c u r r e n t S D b = S D d = - 0 . 3 V , V D D = 5 . 5 V , V C C = 5 . 5 V 2 0 A

TA O p e r a t i n g f r e e - a i r t e m p e r a t u r e 4 0 8 5 C

4 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d

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D C C H A R A C T E R I S T I C S

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

TA = 2 5C ( u n l e s s o t h e r w i s e n o t e d )

P A R A M E T E R T E S T C O N D I T I O N S M I N T Y P M A X U N I T

C l a s s - D a u d i o p o w e r a m p l i f i e rVC C 3 5 . 5 V v o l t a g e s u p p l y r a n g e , V C CI N

S D d = S D b = 0 V , V D D = 1 . 8 V , R L = 8 0 . 0 4 1 . 5

S D d = S D b = 0 V , V D D = 3 . 6 V , R L = 8 0 . 0 4 1 . 5

S D d = S D b = 0 V , V D D = 4 . 5 V , R L = 8 0 . 0 2 1 . 5 IS D S h u t d o w n q u i e s c e n t c u r r e n t A

S D d = S D b = 0 . 3 5 V , V D D = 1 . 8 V , R L = 8 0 . 0 3 1 . 5

S D d = S D b = 0 . 3 5 V , V D D = 3 . 6 V , R L = 8 0 . 0 3 1 . 5

S D d = S D b = 0 . 3 5 V , V D D = 4 . 5 V , R L = 8 0 . 0 2 1 . 5

B o o s t c o n v e r t e r q u i e s c e n t S D d = 0 V , S D b = 1 . 3 V , V D D = 3 . 6 V , V C C = 5 . 5 V , N o 1 . 3 ID D m Ac u r r e n t L o a d , N o F i l t e r

VD D = 3 . 6 , V c c = 5 . 5 V , N o L o a d , N o F i l t e r 4 . 3 6 C l a s s D a m p l i f i e r q u i e s c e n t IC C m Ac u r r e n t VD D = 4 . 5 , V c c = 5 . 5 V , N o L o a d , N o F i l t e r 3 . 6 6

S D d = S D b = 1 . 3 V , V D D = 3 . 6 , V c c = 5 . 5 V , N o L o a d , N o 1 6 . 5 2 3 B o o s t c o n v e r t e r a n d a u d i o F i l t e r

ID D p o w e r a m p l i f i e r q u i e s c e n t m A S D d = S D b = 1 . 3 V , V D D = 4 . 5 , V c c = 5 . 5 V , N o L o a d , N o 1 1 1 8 . 5 c u r r e n t , C l a s s D ( 1 )

F i l t e r B o o s t c o n v e r t e r s w i t c h i n g 5 0 0 6 0 0 7 0 0 k H z f r e q u e n c y f

C l a s s D s w i t c h i n g f r e q u e n c y 2 5 0 3 0 0 3 5 0 k H z

U V L O U n d e r v o l t a g e l o c k o u t 1 . 7 V

G a i n i n p u t l o w l e v e l G a i n = 2 V / V ( 6 d B ) 0 0 . 3 5 V

G A I N G a i n i n p u t m i d l e v e l G a i n = 6 V / V ( 1 5 . 5 d B ) ( f l o a t i n g i n p u t ) 0 . 7 0 . 8 1 V

G a i n i n p u t h i g h l e v e l G a i n = 1 0 V / V ( 2 0 d B ) 1 . 3 5 V

C l a s s D P o w e r o n r e s e t O N 2 . 8 V P O RD t h r e s h o l d

( 1 ) I D D i s c a l c u l a t e d u s i n g I D D = ( IC C VC C) / ( V D D ) , w h e r e I C C i s t h e c l a s s D a m p l i f i e r q u i e s c e n t c u r r e n t ; = 4 0 % , w h i c h i s t h e b o o s t c o n v e r t e r e f f i c i e n c y w h e n c l a s s D a m p l i f i e r h a s n o l o a d . T o a c h i e v e t h e m i n i m a l 4 0 % , i t i s r e c o m m e n d e d t o u s e t h e s u g g e s t e d i n d u c t o r s i n t a b l e 4 a n d t o f o l l o w t h e l a y o u t g u i d e l i n e s .


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B O O S T C O N V E R T E R D C C H A R A C T E R I S T I C S

C L A S S D A M P L I F I E R D C C H A R A C T E R I S T I C S

A C C H A R A C T E R I S T I C S

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7



VC C O u t p u t v o l t a g e r a n g e 3 . 0 5 . 5 V

VF B F e e d b a c k v o l t a g e 4 9 0 5 0 0 5 1 0 m V

IO L O u t p u t c u r r e n t l i m i t , B o o s t _ m a x 1 3 0 0 1 5 0 0 1 7 0 0 m A RO N _ P B P M O S s w i t c h r e s i s t a n c e 2 2 0 m

RO N _ N B N M O S r e s i s t a n c e 1 7 0 m

N o L o a d , 1 . 8 V < V D D < 5 . 2 L i n e r e g u l a t i o n 3 m V / V V , VC C = 5 . 5 V

VD D = 3 . 6 V , 0 < I L < 5 0 0 m A , L o a d r e g u l a t i o n 3 0 m V / A VC C = 5 . 5 V

IL S t a r t u p c u r r e n t l i m i t , B o o s t 0 . 4 IB o o s t m A



Vin = 1 0 0 m V , V D D = 1 . 8 V , V C C = 3 V , R L = 8 0 . 5 2 . 2 C M R I n p u t c o m m o n m o d e r a n g e V in = 1 0 0 m V , V D D = 2 . 5 V , V C C = 3 . 6 V , R L = 8 0 . 5 2 . 8 V

Vin = 1 0 0 m V , V D D = 3 . 6 V , V C C = 5 . 5 V , R L = 8 0 . 5 4 . 7

RL = 8 , Vi c m = 0 . 5 a n d V ic m = VC C 0 . 8 , d i f f e r e n t i a l C M R R I n p u t c o m m o n m o d e r e j e c t i o n 7 5 d B i n p u t s s h o r t e d

VC C = 3 . 6 V , A v = 2 V / V , I N + = I N = V r e f, RL = 8 1 6

VC C= 3 . 6 V , A v = 6 V / V , I N + = I N = V r e f, RL = 8 1 6O u t p u t o f f s e t v o l t a g e VO O m VC l a s s - D VC C= 3 . 6 V , A v = 1 0 V / V , I N + = I N = V r e f, RL = 8 1 6

VC C = 5 . 5 V , A v = 2 V / V , I N + = I N = V r e f, RL = 8 1 6

G a i n = 2 V / V ( 6 d B ) 3 2

Rin I n p u t I m p e d a n c e G a i n = 6 V / V ( 1 5 . 5 d B ) 1 5 k

G a i n = 1 0 V / V ( 2 0 d B ) 9 . 5

O U T P H i g h - s i d e F E T O n - s t a t e 0 . 3 6 s e r i e s r e s i s t a n c e

RD S ( o n ) O U T P L o w - s i d e F E T O n - s t a t e

0 . 3 6 s e r i e s r e s i s t a n c e

IO U T x = 3 0 0 m A ; V C C = 3 . 6 V O U T N H i g h - s i d e F E T O n - s t a t e


RD S ( o n ) O U T N L o w - s i d e F E T O n - s t a t e


L o w G a i n G A I N 0 . 3 5 V 1 . 8 2 2 . 2 V / V

AV M i d G a i n G A I N = 0 . 8 V 5 . 7 6 6 . 3 V / V

H i g h G a i n G A I N 1 . 3 5 V 9 . 5 1 0 1 0 . 5 V / V

TA = 2 5C , VD D = 3 . 6 V , R L = 8 , L = 4 . 7 H ( u n l e s s o t h e r w i s e n o t e d )


tS T A R T S t a r t u p t i m e 1 . 8 V VD D 5 . 5 V , C I N 1 F 7 . 5 m s

T H D + N = 1 % , V C C = 5 . 5 V , V D D = 3 . 6 V , 8 5 %RL= 8 , P o u t = 1 . 7 W , C b o o s t = 4 7 F

E f f i c i e n c y T H D + N = 1 % , V C C = 5 . 5 V , V D D = 4 . 2 V , 8 7 . 5 % RL = 8 , P o u t = 1 . 7 W

T h e r m a l S h u t d o w n T h r e s h o l d 1 5 0 C



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C L A S S D A M P L I F I E R A C C H A R A C T E R I S T I C S

TPA2013D1

IN+

IN

OUT+

OUT

VDD

VDD

GND

CI

CIMeasurement

Output

+

+

Load30kHz

Low-PassFilter

MeasurementInput

+

1 Fm

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

TA = 2 5C , VD D = 3 . 6 V , R L = 8 , L = 4 . 7 H ( u n l e s s o t h e r w i s e n o t e d )


K S V R O u t p u t r e f e r r e d p o w e r s u p p l y VD D = 3 . 6 V , V C C = 5 . 5 V , 2 0 0 m V P P r i p p l e , f = 2 1 7 9 5 d BC l a s s - D r e j e c t i o n r a t i o H z

f = 1 k H z , P o = 1 . 7 W , V C C = 5 . 5 V 1 %

f = 1 k H z , P o = 1 . 2 W , V C C = 4 . 5 V 1 % T H D + N T o t a l h a r m o n i c d i s t o r t i o n + n o i s e

C l a s s - D f = 1 k H z , P o = 2 . 2 W , V C C = 5 . 5 V 1 0 %

f = 1 k H z , P o = 1 W , V C C = 5 . 5 V 0 . 1 %

V n O u t p u t i n t e g r a t e d n o i s e f l o o r A v = 6 d B ( 2 V / V ) 3 1 C l a s s - D V r m s O u t p u t i n t e g r a t e d n o i s e f l o o r

A v = 6 d B ( 2 V / V ) 2 3 A - w e i g h t e d

T H D + N = 1 0 % , V C C = 5 . 5 V , V D D = 3 . 6 V , R L = 8 2 . 2

T H D + N = 1 % , V C C = 5 . 5 V , V D D = 3 . 6 V , R L = 8 1 . 7

T H D + N = 1 % , V C C = 4 . 5 V , V D D = 3 . 6 V , R L = 8 1 . 2PO M a x i m u m o u t p u t p o w e r W

T H D + N = 1 0 % , V C C = 5 . 5 V , V D D = 3 . 6 V , R L = 4 2 . 7

T H D + N = 1 % , V C C = 5 . 5 V , V D D = 3 . 6 V , R L = 4 2 . 2

T H D + N = 1 % , V C C

= 4 . 5 V , V D D

= 3 . 6 V , R L

= 4 1 . 9

T E S T S E T - U P F O R G R A P H S

( 1 ) C I w a s s h o r t e d f o r a n y c o m m o n - m o d e i n p u t v o l t a g e m e a s u r e m e n t . A l l o t h e r m e a s u r e m e n t s w e r e t a k e n w i t h a 1 - F CI( u n l e s s o t h e r w i s e n o t e d ) .

( 2 ) A 3 3 - H i n d u c t o r w a s p l a c e d i n s e r i e s w i t h t h e l o a d r e s i s t o r t o e m u l a t e a s m a l l s p e a k e r f o r e f f i c i e n c y m e a s u r e m e n t s .

( 3 ) T h e 3 0 - k H z l o w - p a s s f i l t e r i s r e q u i r e d , e v e n i f t h e a n a l y z e r h a s a n i n t e r n a l l o w - p a s s f i l t e r . A n R C l o w - p a s s f i l t e r

( 1 0 0 , 4 7 - n F ) i s u s e d o n e a c h o u t p u t f o r t h e d a t a s h e e t g r a p h s .

( 4 ) L = 4 . 7 H i s u s e d f o r t h e b o o s t c o n v e r t e r u n l e s s o t h e r w i s e n o t e d .



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T Y P I C A L C H A R A C T E R I S T I C S

PO Output Power W

0

20

40

60

80

100

0.0 0.5 1.0 1.5

Efficiency

%

G001

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

VDD = 4.2 V

VDD = 3.6 V VDD = 2.5 V

VDD = 1.8 V

PO Output Power W

0

20

40

60

80

100

0.0 0.5 1.0 1.5 2.0

Efficiency

%

G002

Gain = 2 V/V

RL = 8 + 33 H

VCC = 5.5 V

VDD = 4.2 V

VDD = 3.6 V VDD = 2.5 V

VDD = 1.8 V

PO Output Power W

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.0 0.5 1.0 1.5

PD

PowerDissipation

W

G003

VDD = 3.6 V

VDD = 1.8 V

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

VDD = 2.5 V

VDD = 4.2 V

PO Output Power W

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.0 0.5 1.0 1.5 2.0

PD

PowerDissipation

W

G004

VDD = 1.8 V

Gain = 2 V/V

RL = 8 + 33 H

VCC = 5.5 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

PO Output Power W

0.0

0.2

0.4

0.6

0.8

1.0

0.0 0.5 1.0 1.5

IDD

Sup

plyCurrent

A

G005

VDD = 1.8 V

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

PO Output Power W

0.0

0.2

0.4

0.6

0.8

1.0

1.2

0.0 0.5 1.0 1.5 2.0

IDD

Sup

plyCurrent

A

G006

VDD = 1.8 V

Gain = 2 V/V

RL = 8 + 33 H

VCC = 5.5 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

E F F I C I E N C Y E F F I C I E N C Y v s v s

O U T P U T P O W E R O U T P U T P O W E R

F i g u r e 1 . F i g u r e 2 .

P O W E R D I S S I P A T I O N P O W E R D I S S I P A T I O N v s v s


F i g u r e 3 . F i g u r e 4 .

S U P P L Y C U R R E N T S U P P L Y C U R R E N T v s v s


F i g u r e 5 . F i g u r e 6 .


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VDD Supply Voltage V

0.0

0.5

1.0

1.5

2.0

2.5

1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6

POOutputPowerW

G007

Gain = 2 V/V

RL

= 8 + 33 H

THD = 1%

VCC = 4.5 V

L = 2.2 H

L = 3.3 HL = 6.2 H

L = 4.7 H


0.0

0.5

1.0

1.5

2.0

2.5

1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 5.4

POOutputPowerW

G008

L = 3.3 H

L = 6.2 H

L = 4.7 H

Gain = 2 V/V

RL = 8 + 33 H

THD = 1%

VCC = 5.5 V


0.0

0.5

1.0

1.5

2.0

2.5

1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6

POOutputPowerW

G009

Gain = 2 V/V

RL = 8 + 33 H

THD = 10%

VCC = 4.5 V

L = 2.2 H

L = 3.3 HL = 6.2 H

L = 4.7 H


0.0

0.5

1.0

1.5

2.0

2.5

1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 5.4

POOutputPowerW

G010

L = 6.2 H

L = 4.7 H

L = 3.3 H

Gain = 2 V/V

RL = 8 + 33 H

THD = 10%

VCC = 5.5 V

RL Load Resistance

0.0

0.5

1.0

1.5

2.0

2.5

3.0

4 8 12 16 20 24 28 32

POOutp

utPowerW

G011

f = 1 kHz

Gain = 2 V/V

VCC = 4.5 V

THD = 1%

THD = 10%

RL Load Resistance

0.0

0.5

1.0

1.5

2.0

2.5

3.0

4 8 12 16 20 24 28 32

POOutp

utPowerW

G012

f = 1 kHz

Gain = 2 V/V

VCC = 5.5 V

THD = 1%

THD = 10%

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

T Y P I C A L C H A R A C T E R I S T I C S ( c o n t i n u e d )

O U T P U T P O W E R O U T P U T P O W E R v s v s

S U P P L Y V O L T A G E S U P P L Y V O L T A G E

F i g u r e 7 . F i g u r e 8 .


S U P P L Y V O L T A G E S U P P L Y V O L T A G E

F i g u r e 9 . F i g u r e 1 0 .


L O A D L O A D

F i g u r e 1 1 . F i g u r e 1 2 .



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PO Output Power W

0.01 0.1 1 3

100

1

0.1

0.01

G013

Gain = 2 V/V

RL

= 8 + 33 H

VCC = 4.5 V10VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 VTHD+N%

0.01 0.1 1 3

PO Output Power W

1

0.1

0.01

G014

Gain = 2 V/V

RL

= 8 + 33 H

VCC = 5.5 V10VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

THD+N%

100

PO Output Power W

0.01 0.1 1 5

1

0.1

0.01

G015

Gain = 2 V/V

RL = 4 + 33 H

VCC = 5.5 V10 VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

THD+N%

100

f Frequency Hz

20 100 1k 20k

0.1

0.01

0.001

G016

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

VDD = 1.8 V1

PO = 0.075 W

PO = 0.2 W

10k

PO = 0.025 W

THD+N%

10

f Frequency Hz

0.1

0.01

0.001

G017

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

VDD = 3.6 V1

PO = 0.05 W

PO = 1 W

20 100 1k 20k10k

PO = 0.25 W

THD

+N%

10

20 100 1k 20k10k

f Frequency Hz

0.1

0.01

0.001

G018

Gain = 2 V/V

RL = 8 + 33 H

VCC = 5.5 V

VDD = 1.8 V1

PO = 0.075 W

PO = 0.025 W

PO = 0.2 W

THD

+N%

10

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7


T O T A L H A R M O N I C D I S T O R T I O N + N O I S E T O T A L H A R M O N I C D I S T O R T I O N + N O I S E v s v s


F i g u r e 1 3 . F i g u r e 1 4 .


O U T P U T P O W E R F R E Q U E N C Y

F i g u r e 1 5 . F i g u r e 1 6 .


F R E Q U E N C Y F R E Q U E N C Y

F i g u r e 1 7 . F i g u r e 1 8 .

1 0 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d

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20 100 1k 20k10k

f Frequency Hz

0.1

0.01

0.001

G019

Gain = 2 V/V

RL

= 8 + 33 H

VCC = 5.5 V

VDD = 3.6 V1

PO = 0.05 W

PO = 1 W

PO = 0.25 W

THD+N%

10

20 100 1k 20k10k

f Frequency Hz

0.1

0.01

0.001

G020

Gain = 2 V/V

PO

= 250 mW

RL = 4 + 33 H

VCC = 4.5 V1

VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

THD+N%

10

20 100 1k 20k10k

f Frequency Hz

0.1

0.01

0.001

G021

Gain = 2 V/V

PO = 250 mW

RL = 4 + 33 H

VCC = 5.5 V1

VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

VDD = 3.6 V

THD+N%

10

120

100

80

60

40

20

0

f Frequency Hz

PSRR

dB

G022

Gain = 2 V/V

RL = 8 + 33 H

VCC = 4.5 V

20 100 1k 20k10k

VDD = 3.6 V

VDD = 4.2 V

VDD = 2.5 V

VDD = 1.8 V

120

100

80

60

40

20

0

f Frequency Hz

PSR

R

dB

G023

Gain = 2 V/V

RL = 8 + 33 H

VCC = 5.5 V

20 100 1k 20k10k

VDD = 3.6 V VDD = 2.5 V

VDD = 1.8 V

VDD = 4.2 V

120

100

80

60

40

20

0

f Frequency Hz

CMRR

dB

G024

Gain = 2 V/V

RL = 8

VCC = 4.5 V

20 100 1k 20k10k

VDD = 3.6 V

VDD = 2.5 VVDD = 1.8 V

VDD = 4.2 V

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7




F i g u r e 1 9 . F i g u r e 2 0 .

T O T A L H A R M O N I C D I S T O R T I O N + N O I S E P O W E R S U P P L Y R E J E C T I O N R A T I O v s v s


F i g u r e 2 1 . F i g u r e 2 2 .

P O W E R S U P P L Y R E J E C T I O N R A T I O C O M M O N - M O D E R E J E C T I O N R A T I O v s v s


F i g u r e 2 3 . F i g u r e 2 4 .

C o p y r i g h t 2 0 0 7 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 1 1


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90

80

70

60

50

40

30

20

10

0

f Frequency Hz

CMRR

dB

G025

Gain = 2 V/V

RL

= 8

VCC = 5.5 V

20 100 1k 20k10k

VDD = 3.6 V

VDD = 1.8 V

VDD = 2.5 V

VDD = 4.2 V

50

55

60

65

70

75

80

85

90

95

100

IO Output Current A

0.01 0.1 1

VCC = 4.5 V

VDD = 1.8 V

VDD = 2.5 V

VDD = 3.6 V

VDD = 4.2 V

BoostEfficiency

%

G026

50

55

60

65

70

75

80

85

90

95

100

IO Output Current A

0.01 0.1 1

VCC = 5.5 V

VDD = 1.8 V

VDD = 2.5 V

VDD = 3.6 V

VDD = 4.2 V

BoostEfficiency

%

G027VDD Supply Voltage V

50

60

70

80

90

100

1.8 2.2 2.6 3.0 3.4 3.8 4.2

ICC = 250 mA

L = 4.7 H

BoostEfficiency

%

VCC = 4.5 V

VCC = 5.5 V

G028

VDD Supply Voltage (Boost) V

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.8 2.2 2.6 3.0 3.4 3.8 4.2

L = 4.7 H

IOM

Max.

ContinuousOutputCurrent

A

VCC = 4.5 V

VCC = 5.5 V

G029t Time ms

2

1

0

1

2

3

4

5

6

0 2 4 6 8 10 12 14 16 18 20

V

Voltage

V

VCC

OUT

SDb, SDd

Start Time 7.5 ms

G030

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7


C O M M O N - M O D E R E J E C T I O N R A T I O B O O S T E F F I C I E N C Y v s v s

F R E Q U E N C Y O U T P U T C U R R E N T

F i g u r e 2 5 . F i g u r e 2 6 .

B O O S T E F F I C I E N C Y B O O S T E F F I C I E N C Y v s v s

O U T P U T C U R R E N T S U P P L Y V O L T A G E

F i g u r e 2 7 . F i g u r e 2 8 .

M A X I M U M C O N T I N U O U S O U T P U T C U R R E N T v s

S U P P L Y V O L T A G E ( B O O S T ) S t a r t - U p T i m e

F i g u r e 2 9 . F i g u r e 3 0 .


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A P P L I C A T I O N I N F O R M A T I O N

F U L L Y D I F F E R E N T I A L A M P L I F I E R

A d v a n t a g e s o f F u l l y D i f f e r e n t i a l A m p l i f i e r s

B O O S T C O N V E R T E R

B o o s t T e r m s

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

T h e T P A 2 0 1 3 D 1 i s a f u l l y d i f f e r e n t i a l a m p l i f i e r w i t h d i f f e r e n t i a l i n p u t s a n d o u t p u t s . T h e f u l l y d i f f e r e n t i a l a m p l i f i e r c o n s i s t s o f a d i f f e r e n t i a l a m p l i f i e r w i t h c o m m o n - m o d e f e e d b a c k . T h e d i f f e r e n t i a l a m p l i f i e r e n s u r e s t h a t t h e a m p l i f i e r o u t p u t s a d i f f e r e n t i a l v o l t a g e o n t h e o u t p u t t h a t i s e q u a l t o t h e d i f f e r e n t i a l i n p u t t i m e s t h e g a i n . T h e

c o m m o n - m o d e f e e d b a c k e n s u r e s t h a t t h e c o m m o n - m o d e v o l t a g e a t t h e o u t p u t i s b i a s e d a r o u n d V C C/ 2 r e g a r d l e s s o f t h e c o m m o n - m o d e v o l t a g e a t t h e i n p u t . T h e f u l l y d i f f e r e n t i a l T P A 2 0 1 3 D 1 c a n s t i l l b e u s e d w i t h a s i n g l e - e n d e d i n p u t ; h o w e v e r , t h e T P A 2 0 1 3 D 1 s h o u l d b e u s e d w i t h d i f f e r e n t i a l i n p u t s w h e n i n a n o i s y e n v i r o n m e n t , l i k e a w i r e l e s s h a n d s e t , t o e n s u r e m a x i m u m n o i s e r e j e c t i o n .

I n p u t - c o u p l i n g c a p a c i t o r s n o t r e q u i r e d :

T h e f u l l y d i f f e r e n t i a l a m p l i f i e r a l l o w s t h e i n p u t s t o b e b i a s e d a t v o l t a g e o t h e r t h a n m i d - s u p p l y . T h e i n p u t s o ft h e T P A 2 0 1 3 D 1 c a n b e b i a s e d a n y w h e r e w i t h i n t h e c o m m o n m o d e i n p u t v o l t a g e r a n g e l i s t e d i n t h e R e c o m m e n d e d O p e r a t i n g C o n d i t i o n s t a b l e . I f t h e i n p u t s a r e b i a s e d o u t s i d e o f t h a t r a n g e , i n p u t - c o u p l i n g c a p a c i t o r s a r e r e q u i r e d .

M i d s u p p l y b y p a s s c a p a c i t o r , C ( B Y P A S S ) , n o t r e q u i r e d :

T h e f u l l y d i f f e r e n t i a l a m p l i f i e r d o e s n o t r e q u i r e a b y p a s s c a p a c i t o r . A n y s h i f t i n t h e m i d s u p p l y a f f e c t s b o t h

p o s i t i v e a n d n e g a t i v e c h a n n e l s e q u a l l y a n d c a n c e l s a t t h e d i f f e r e n t i a l o u t p u t . B e t t e r R F - i m m u n i t y :

G S M h a n d s e t s s a v e p o w e r b y t u r n i n g o n a n d s h u t t i n g o f f t h e R F t r a n s m i t t e r a t a r a t e o f 2 1 7 H z . T h et r a n s m i t t e d s i g n a l i s p i c k e d - u p o n i n p u t a n d o u t p u t t r a c e s . T h e f u l l y d i f f e r e n t i a l a m p l i f i e r c a n c e l s t h e s i g n a l b e t t e r t h a n t h e t y p i c a l a u d i o a m p l i f i e r .

T h e T P A 2 0 1 3 D 1 c o n s i s t s o f a b o o s t c o n v e r t e r a n d a C l a s s - D a m p l i f i e r . T h e b o o s t c o n v e r t e r t a k e s a l o w s u p p l y v o l t a g e , V D D, a n d i n c r e a s e s i t t o a h i g h e r o u t p u t v o l t a g e , V C C. VC C i s t h e p o w e r s u p p l y f o r t h e C l a s s - D a m p l i f i e r .

T h e t w o m a i n p a s s i v e c o m p o n e n t s n e c e s s a r y f o r t h e b o o s t c o n v e r t e r a r e t h e b o o s t i n d u c t o r a n d t h e b o o s t c a p a c i t o r . T h e b o o s t i n d u c t o r s t o r e s c u r r e n t , a n d t h e b o o s t c a p a c i t o r s t o r e s c h a r g e . A s t h e C l a s s - D a m p l i f i e r d e p l e t e s t h e c h a r g e i n t h e b o o s t c a p a c i t o r , t h e b o o s t i n d u c t o r c h a r g e s i t b a c k u p w i t h t h e s t o r e d c u r r e n t . T h e

c y c l e o f c h a r g e / d i s c h a r g e o c c u r s a t a f r e q u e n c y o f f b o o s t .

T h e T P A 2 0 1 3 D 1 a l l o w s a r a n g e o f V C C v o l t a g e s , i n c l u d i n g s e t t i n g V C C l o w e r t h a n V D D.

T h e f o l l o w i n g i s a l i s t o f t e r m s a n d d e f i n i t i o n s u s e d i n t h e b o o s t e q u a t i o n s f o u n d l a t e r i n t h i s d o c u m e n t .

C M i n i m u m b o o s t c a p a c i t a n c e r e q u i r e d f o r a g i v e n r i p p l e v o l t a g e o n V C C.

L B o o s t i n d u c t o r

fb o o s t S w i t c h i n g f r e q u e n c y o f t h e b o o s t c o n v e r t e r .

IC C C u r r e n t p u l l e d b y t h e C l a s s - D a m p l i f i e r f r o m t h e b o o s t c o n v e r t e r .

IL A v e r a g e c u r r e n t t h r o u g h t h e b o o s t i n d u c t o r . R 1 a n d R 2 R e s i s t o r s u s e d t o s e t t h e b o o s t v o l t a g e .

VC C B o o s t v o l t a g e . G e n e r a t e d b y t h e b o o s t c o n v e r t e r . V o l t a g e s u p p l y f o r t h e C l a s s - D

a m p l i f i e r .

VD D S u p p l y v o l t a g e t o t h e I C .

IL R i p p l e c u r r e n t t h r o u g h t h e i n d u c t o r .

V R i p p l e v o l t a g e o n V C C d u e t o c a p a c i t a n c e .



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S E T T I N G T H E B O O S T V O L T A G E

CC

0.5 (R1 + R2)V = R1

( 1 )

I N D U C T O R S E L E C T I O N

CCL CC

DD

VI = I

V 0.8

( 2 )

DD CC DD

L CC

V (V V )L =

I f Vboost

-

D ( 3 )

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

U s e E q u a t i o n 1 t o d e t e r m i n e t h e v a l u e o f R 1 f o r a g i v e n V C C. T h e m a x i m u m r e c o m m e n d e d v a l u e f o r V C C i s5 . 5 V . T h e t y p i c a l v a l u e o f t h e V C CF B p i n i s 5 0 0 m V . T h e c u r r e n t t h r o u g h t h e r e s i s t o r d i v i d e r s h o u l d b e a b o u t 1 0 0 t i m e s g r e a t e r t h a n t h e c u r r e n t i n t o t h e V C CF B p i n , t y p i c a l l y 0 . 0 1 A . B a s e d o n t h o s e t w o v a l u e s , t h e r e c o m m e n d e d v a l u e o f R 2 i s 5 0 0 k . VC C m u s t b e g r e a t e r t h a n 3 V a n d l e s s t h a n o r e q u a l t o 5 . 5 V .

S U R F A C E M O U N T I N D U C T O R S

W o r k i n g i n d u c t a n c e d e c r e a s e s a s i n d u c t o r c u r r e n t i n c r e a s e s . I f t h e d r o p i n w o r k i n g i n d u c t a n c e i s s e v e r e e n o u g h , i t m a y c a u s e t h e b o o s t c o n v e r t e r t o b e c o m e u n s t a b l e , o r c a u s e t h e T P A 2 0 1 3 D 1 t o r e a c h i t s c u r r e n t l i m i t a t a l o w e r o u t p u t p o w e r t h a n e x p e c t e d . I n d u c t o r v e n d o r s s p e c i f y c u r r e n t s a t w h i c h i n d u c t o r v a l u e s d e c r e a s e b y a s p e c i f i c p e r c e n t a g e . T h i s c a n v a r y b y 1 0 % t o 3 5 % . I n d u c t a n c e i s a l s o a f f e c t e d b y d c c u r r e n t a n d t e m p e r a t u r e .

T P A 2 0 1 3 D 1 I N D U C T O R E Q U A T I O N S

I n d u c t o r c u r r e n t r a t i n g i s d e t e r m i n e d b y t h e r e q u i r e m e n t s o f t h e l o a d . T h e i n d u c t a n c e i s d e t e r m i n e d b y t w o

f a c t o r s : t h e m i n i m u m v a l u e r e q u i r e d f o r s t a b i l i t y a n d t h e m a x i m u m r i p p l e c u r r e n t p e r m i t t e d i n t h e a p p l i c a t i o n .

U s e E q u a t i o n 2 t o d e t e r m i n e t h e r e q u i r e d c u r r e n t r a t i n g . E q u a t i o n 2 s h o w s t h e a p p r o x i m a t e r e l a t i o n s h i p b e t w e e n t h e a v e r a g e i n d u c t o r c u r r e n t , I L, t o t h e l o a d c u r r e n t , l o a d v o l t a g e , a n d i n p u t v o l t a g e ( I C C, VC C, a n d V D D,r e s p e c t i v e l y ) . I n s e r t I C C, VC C, a n d V D D i n t o E q ua t i o n 2 t o so l v e f o r I L. T h e i n d u c t o r m u s t m a i n t a i n a t l e a s t 9 0 % o f i t s i n i t i a l i n d u c t a n c e v a l u e a t t h i s c u r r e n t .

T h e m i n i m u m w o r k i n g i n d u c t a n c e i s 2 . 2 H . A l o w e r v a l u e m a y c a u s e i n s t a b i l i t y .

R i p p l e c u r r e n t , IL, i s p e a k - t o - p e a k v a r i a t i o n i n i n d u c t o r c u r r e n t . S m a l l e r r i p p l e c u r r e n t r e d u c e s c o r e l o s s e s i n t h e i n d u c t o r a s w e l l a s t h e p o t e n t i a l f o r E M I . U s e E q u a t i o n 3 t o d e t e r m i n e t h e v a l u e o f t h e i n d u c t o r , L . E q u a t i o n 3 s h o w s t h e r e l a t i o n s h i p b e t w e e n i n d u c t a n c e L , V D D, VC C, t h e s w i t c h i n g f r e q u e n c y , f b o o s t , a n d IL. I n s e r t t h e

m a xi m u m a c c e p t a b l e r i p p l e c u r r e n t i n t o E q u a t i o n 3 t o s o l v e f o r L .

IL i s i n v e r s e l y p r o p o r t i o n a l t o L . M i n i m i z e IL a s m u c h a s i s n e c e s s a r y f o r a s p e c i f i c a p p l i c a t i o n . I n c r e a s e t h e i n d u c t a n c e t o r e d u c e t h e r i p p l e c u r r e n t . N o t e t h a t m a k i n g t h e i n d u c t a n c e t o o l a r g e w i l l p r e v e n t t h e b o o s t c o n v e r t e r f r o m r e s p o n d i n g t o f a s t l o a d c h a n g e s p r o p e r l y . T y p i c a l i n d u c t o r v a l u e s f o r t h e T P A 2 0 1 3 D 1 a r e 4 . 7 Ht o 6 . 8 H .

S e l e c t a n i n d u c t o r w i t h a s m a l l d c r e s i s t a n c e , D C R . D C R r e d u c e s t h e o u t p u t p o w e r d u e t o t h e v o l t a g e d r o p a c r o s s t h e i n d u c t o r .



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C A P A C I T O R S E L E C T I O N

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

S U R F A C E M O U N T C A P A C I T O R S

T e m p e r a t u r e a n d a p p l i e d d c v o l t a g e i n f l u e n c e t h e a c t u a l c a p a c i t a n c e o f h i g h - K m a t e r i a l s .

T a b l e 3 s h o w s t h e r e l a t i o n s h i p b e t w e e n t h e d i f f e r e n t t y p e s o f h i g h - K m a t e r i a l s a n d t h e i r a s s o c i a t e d t o l e r a n c e s , t e m p e r a t u r e c o e f f i c i e n t s , a n d t e m p e r a t u r e r a n g e s . N o t i c e t h a t a c a p a c i t o r m a d e w i t h X 5 R m a t e r i a l c a n l o s e u p t o 1 5 % o f i t s c a p a c i t a n c e w i t h i n i t s w o r k i n g t e m p e r a t u r e r a n g e .

H i g h - K m a t e r i a l i s v e r y s e n s i t i v e t o a p p l i e d d c v o l t a g e . X 5 R c a p a c i t o r s c a n h a v e l o s s e s r a n g i n g f r o m 1 5 t o 4 5 % o f t h e i r i n i t i a l c a p a c i t a n c e w i t h o n l y h a l f o f t h e i r d c r a t e d v o l t a g e a p p l i e d . F o r e x a m p l e , i f 5 V d c i s a p p l i e d t o a 1 0 V , 1 F X 5 R c a p a c i t o r , t h e m e a s u r e d c a p a c i t a n c e a t t h a t p o i n t m a y s h o w 0 . 8 5 F , 0 . 5 5 F , o r s o m e w h e r e i n b e t w e e n . Y 5 V c a p a c i t o r s h a v e l o s s e s t h a t c a n r e a c h o r e x c e e d 5 0 % t o 7 5 % o f t h e i r r a t e d v a l u e .

I n a n a p p l i c a t i o n , t h e w o r k i n g c a p a c i t a n c e o f c o m p o n e n t s m a d e w i t h h i g h - K m a t e r i a l s i s g e n e r a l l y m u c h l o w e r t h a n n o m i n a l c a p a c i t a n c e . A w o r s t c a s e r e s u l t w i t h a t y p i c a l X 5 R m a t e r i a l m i g h t b e 1 0 % t o l e r a n c e , 1 5 % t e m p e r a t u r e e f f e c t , a n d 4 5 % d c v o l t a g e e f f e c t a t 5 0 % o f t h e r a t e d v o l t a g e . T h i s p a r t i c u l a r c a s e w o u l d r e s u l t i n a w o r k i n g c a p a c i t a n c e o f 4 2 % ( 0 . 9 0 . 8 5 0 . 5 5 ) o f t h e n o m i n a l v a l u e .

S e l e c t h i g h - K c e r a m i c c a p a c i t o r s a c c o r d i n g t o t h e f o l l o w i n g r u l e s :

1 . U s e c a p a c i t o r s m a d e o f m a t e r i a l s w i t h t e m p e r a t u r e c o e f f i c i e n t s o f X 5 R , X 7 R , o r b e t t e r .

2 . U s e c a p a c i t o r s w i t h d c v o l t a g e r a t i n g s o f a t l e a s t t w i c e t h e a p p l i c a t i o n v o l t a g e . U s e m i n i m u m 1 0 V c a p a c i t o r s f o r t h e T P A 2 0 1 3 D 1 .

3 . C h o o s e a c a p a c i t a n c e v a l u e a t l e a s t t w i c e t h e n o m i n a l v a l u e c a l c u l a t e d f o r t h e a p p l i c a t i o n . M u l t i p l y t h e n o m i n a l v a l u e b y a f a c t o r o f 2 f o r s a f e t y . I f a 1 0 F c a p a c i t o r i s r e q u i r e d , u s e 2 0 F .

T h e p r e c e d i n g r u l e s a n d r e c o m m e n d a t i o n s a p p l y t o c a p a c i t o r s u s e d i n c o n n e c t i o n w i t h t h e T P A 2 0 1 3 D 1 . T h e T P A 2 0 1 3 D 1 c a n n o t m e e t i t s p e r f o r m a n c e s p e c i f i c a t i o n s i f t h e r u l e s a n d r e c o m m e n d a t i o n s a r e n o t f o l l o w e d .

T a b l e 3 . T y p i c a l t o l e r a n c e a n d t e m p e r a t u r e c o e f f i c i e n t o f c a p a c i t a n c e b y m a t e r i a l

M a t e r i a l C O G / N P O X 7 R X 5 R

T y p i c a l T o l e r a n c e 5 % 1 0 % 8 0 / 2 0 %

T e m p e r a t u r e C o e f f i c i e n t 3 0 p p m 1 5 % 2 2 / 8 2 %

T e m p e r a t u r e R a n g e , C 5 5 / 1 2 5 C 5 5 / 1 2 5 C - 3 0 / 8 5 C



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( )CC CC DDboost CC

I V VC = 2

V f V

-

D ( 4 )

( )CC CC DDboost CC

I V VC =

V f V

-

D ( 5 )

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

T P A 2 0 1 3 D 1 C A P A C I T O R E Q U A T I O N S

T h e v a l u e o f t h e b o o s t c a p a c i t o r i s d e t e r m i n e d b y t h e m i n i m u m v a l u e o f w o r k i n g c a p a c i t a n c e r e q u i r e d f o r s t a b i l i t y a n d t h e m a x i m u m v o l t a g e r i p p l e a l l o w e d o n V C C i n t h e a p p l i c a t i o n . T h e m i n i m u m v a l u e o f w o r k i n g c a p a c i t a n c e i s 1 0 F . D o n o t u s e a n y c o m p o n e n t w i t h a w o r k i n g c a p a c i t a n c e l e s s t h a n 1 0 F .

F o r X 5 R o r X 7 R c e r a m i c c a p a c i t o r s , E q u a t i o n 4 s h o w s t h e r e l a t i o n s h i p b e t w e e n t h e b o o s t c a p a c i t a n c e , C , t o l o a d c u r r e n t , l o a d v o l t a g e , r i p p l e v o l t a g e , i n p u t v o l t a g e , a n d s w i t c h i n g f r e q u e n c y ( I

C C, V

C C, V , V

D D, f

b o o s t r e s p e c t i v e l y ) . I n s e r t t h e m a x i m u m a l l o w e d r i p p l e v o l t a g e i n t o E q u a t i o n 4 t o s o l v e f o r C . A f a c t o r o f 2 i s i n c l u d e d t o i m p l e m e n t t h e r u l e s a n d s p e c i f i c a t i o n s l i s t e d e a r l i e r .

F o r a l u m i n u m o r t a n t a l u m c a p a c i t o r s , E q u a t i o n 5 s h o w s t h e r e l a t i o n s h i p b e t w e e n h e b o o s t c a p a c i t a n c e , C , t o l o a d c u r r e n t , l o a d v o l t a g e , r i p p l e v o l t a g e , i n p u t v o l t a g e , a n d s w i t c h i n g f r e q u e n c y ( I C C, VC C, V , VD D, fb o o s t r e s p e c t i v e l y ) . I n s e r t t h e m a x i m u m a l l o w e d r i p p l e v o l t a g e i n t o E q u a t i o n 5 t o s o l v e f o r C . S o l v e t h i s e q u a t i o n a s s u m i n g E S R i s z e r o .

C a p a c i t a n c e o f a l u m i n u m a n d t a n t a l u m c a p a c i t o r s i s n o r m a l l y n o t s e n s i t i v e t o a p p l i e d v o l t a g e s o t h e r e i s n o f a c t o r o f 2 i n c l u d e d i n E q u a t i o n 5 . H o w e v e r , t h e E S R i n a l u m i n u m a n d t a n t a l u m c a p a c i t o r s c a n b e s i g n i f i c a n t . C h o o s e a n a l u m i n u m o r t a n t a l u m c a p a c i t o r w i t h E S R a r o u n d 3 0 m . F o r b e s t p e r f o r n a m c e u s i n g o f t a n t a l u m c a p a c i t o r , u s e a t l e a s t a 1 0 V r a t i n g . N o t e t h a t t a n t a l u m c a p a c i t o r s m u s t g e n e r a l l y b e u s e d a t v o l t a g e s o f h a l f t h e i r r a t i n g s o r l e s s .



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R E C O M M E N D E D I N D U C T O R A N D C A P A C I T O R V A L U E S B Y A P P L I C A T I O N

C L A S S - D R E Q U I R E M E N T S

D E C O U P L I N G C A P A C I T O R S

I N P U T C A P A C I T O R S

)I I

1f =c (2 R C p ( 6 )

T P A 2 0 1 3 D 1

S L O S 5 2 0 A U G U S T 2 0 0 7

U s e T a b l e 4 a s a g u i d e f o r d e t e r m i n i n g t h e p r o p e r i n d u c t o r a n d c a p a c i t o r v a l u e s .

T a b l e 4 . R e c o m m e n d e d V a l u e s

C l a s s - D C l a s s - D M i n i m u m R e q u i r e d M a x

O u t p u t M a x I L L I n d u c t o r V e n d o r C ( 2 ) C a p a c i t o r V e n d o r

L o a d V D D VC C

VP o w e r ( A ) ( H ) P a r t N u m b e r s ( F ) P a r t N u m b e r s () ( V ) ( V ) ( m V p p ) ( W ) ( 1 )

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( 1 ) A l l p o w e r l e v e l s a r e c a l c u l a t e d a t 1 % T H D u n l e s s o t h e r w i s e n o t e d ( 2 ) A l l v a l u e s l i s t e d a r e f o r c e r a m i c c a p a c i t o r s . T h e c o r r e c t i o n f a c t o r o f 2 i s i n c l u d e d i n t h e v a l u e s .

T h e T P A 2 0 1 3 D 1 i s a h i g h - p e r f o r m a n c e C l a s s - D a u d i o a m p l i f i e r t h a t r e q u i r e s a d e q u a t e p o w e r s u p p l y d e c o u p l i n g t o e n s u r e t h e e f f i c i e n c y i s h i g h a n d t o t a l h a r m o n i c d i s t o r t i o n ( T H D ) i s l o w . P l a c e a l o w e q u i v a l e n t - s e r i e s - r e s i s t a n c e ( E S R ) c e r a m i c c a p a c i t o r , t y p i c a l l y 1 F a s c l o s e a s p o s s i b l e t o t h e d e v i c e V D D l e a d . T h i s c h o i c e o f c a p a c i t o r a n d p l a c e m e n t h e l p s w i t h h i g h e r f r e q u e n c y t r a n s i e n t s , s p i k e s , o r d i g i t a l h a s h o n t h e l i n e . A d d i t i o n a l l y , p l a c i n g t h i s d e c o u p l i n g c a p a c i t o r c l o s e t o t h e T P A 2 0 1 3 D 1 i s i m p o r t a n t f o r t h e e f f i c i e n c y o f t h e C l a s s - D a m p l i f i e r , b e c a u s e a n y r e s i s t a n c e o r i n d u c t a n c e i n t h e t r a c e b e t w e e n t h e d e v i c e a n d t h e c a p a c i t o r c a n c a u s e a l o s s i n e f f i c i e n c y . P l a c e a c a p a c i t o r o f 1 0 F o r g r e a t e r b e t w e e n t h e p o w e r s u p p l y a n d t h e b o o s t i n d u c t o r . T h e c a p a c i t o r f i l t e r s o u t h i g h f r e q u e n c y n o i s e . M o r e i m p o r t a n t l y , i t a c t s a s a c h a r g e r e s e r v o i r , p r o v i d i n g e n e r g y m o r e q u i c k l y t h a n t h e b o a r d s u p p l y , t h u s h e l p i n g t o p r e v e n t a n y d r o o p .

T h e T P A 2 0 1 3 D 1 d o e s n o t r e q u i r e i n p u t c o u p l i n g c a p a c i t o r s i f t h e d e s i g n u s e s a d i f f e r e n t i a l s o u r c e t h a t i s b i a s e d w i t h i n t h e c o m m o n m o d e i n p u t r a n g e . U s e i n p u t c o u p l i n g c a p a c i t o r s i f t h e i n p u t s i g n a l i s n o t b i a s e d w i t h i n t h e r e c o m m e n d e d c o m m o n - m o d e i n p u t r a n g e , i f h i g h p a s s f i l t e r i n g i s n e e d e d , o r i f u s i n g a s i n g l e - e n d e d s o u r c e .

T h e i n p u t c a p a c i t o r s a n d i n p u t r e s i s t o r s f o r m a h i g h - p a s s f i l t e r w i t h t h e c o r n e r f r e q u e n c y , f c , d e t e r m i n e d i n E q u a t i o n 6 .

T h e v a l u e o f t h e i n p u t c a p a c i t o r i s i m p o r t a n t t o c o n s i d e r a s i t d i r e c t l y a f f e c t s t h e b a s s ( l o w f r e q u e n c y ) p e r f o r m a n c e o f t h e c i r c u i t . S p e a k e r s i n w i r e l e s s p h o n e s c a n n o t u s u a l l y r e s p o n d w e l l t o l o w f r e q u e n c i e s , s o t h e c o r n e r f r e q u e n c y c a n b e s e t t o b l o c k l o w f r e q u e n c i e s i n t h i s a p p l i c a t i o n . N o t u s i n g i n p u t c a p a c i t o r s c a n i n c r e a s e o u t p u t o f f s e t .

U s e E q u a t i o n 7 t o f i n d t h e r e q u i r e d t h e i n p u t c o u p l i n g c a p a c i t a n c e .



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A n y m i s m a t c h i n c a p a c i t a n c e b e t w e e n t h e t w o i n p u t s i n p u t s w i l l c a u s e a m i s m a t c h i n t h e c o r n e r f r e q u e n c i e s . C h o o s e c a p a c i t o r s w i t h a t o l e r a n c e o f 1 0 % o r b e t t e r .

A f e r r i t e b e a d f i l t e r c a n o f t e n b e u s e d i f t h e d e s i g n i s f a i l i n g r a d i a t e d e m i s s i o n s w i t h o u t a n L C f i l t e r a n d t h e f r e q u e n c y s e n s i t i v e c i r c u i t i s g r e a t e r t h a n 1 M H z . T h i s f i l t e r f u n c t i o n s w e l l f o r c i r c u i t s t h a t j u s t h a v e t o p a s s F C C a n d C E b e c a u s e F C C a n d C E o n l y t e s t r a d i a t e d e m i s s i o n s g r e a t e r t h a n 3 0 M H z . W h e n c h o o s i n g a f e r r i t e b e a d , c h o o s e o n e w i t h h i g h i m p e d a n c e a t h i g h f r e q u e n c i e s , a n d v e r y l o w i m p e d a n c e a t l o w f r e q u e n c i e s . I n a d d i t i o n , s e l e c t a f e r r i t e b e a d w i t h a d e q u a t e c u r r e n t r a t i n g t o p r e v e n t d i s t o r t i o n o f t h e o u t p u t s i g n a l .

U s e a n L C o u t p u t f i l t e r i f t h e r e a r e l o w f r e q u e n c y ( < 1 M H z ) E M I s e n s i t i v e c i r c u i t s a n d / o r t h e r e a r e l o n g l e a d s f r o m a m p l i f i e r t o s p e a k e r .

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W h e n u s i n g s w i t c h i n g a m p l i f i e r s w i t h C O D E C s a n d D A C s , s o m e t i m e s t h e r e i s a n i n c r e a s e i n t h e o u t p u t n o i s e f l o o r f r o m t h e a u d i o a m p l i f i e r . T h i s o c c u r s w h e n m i x i n g o f t h e o u t p u t f r e q u e n c i e s o f t h e C O D E C / D A C w i t h t h e s w i t c h i n g f r e q u e n c i e s o f t h e a u d i o a m p l i f i e r i n p u t s t a g e . T h e n o i s e i n c r e a s e c a n b e s o l v e d b y p l a c i n g a l o w - p a s s f i l t e r b e t w e e n t h e C O D E C / D A C a n d a u d i o a m p l i f i e r . T h i s f i l t e r s o f f t h e h i g h f r e q u e n c i e s t h a t c a u s e t h e p r o b l e m a n d a l l o w p r o p e r p e r f o r m a n c e .

T h e T P A 2 0 1 3 D 1 h a s a t w o p o l e l o w p a s s f i l t e r a t t h e i n p u t s . T h e c u t o f f f r e q u e n c y o f t h e f i l t e r i s s e t t o a p p r o x i m a t e l y 1 0 0 k H z . T h e i n t e g r a t e d l o w p a s s f i l t e r o f t h e T P A 2 0 1 3 D 1 e l i m i n a t e s t h e n e e d f o r a d d i t i o n a l e x t e r n a l f i l t e r i n g c o m p o n e n t s . A p r o p e r l y d e s i g n e d a d d i t i o n a l l o w p a s s f i l t e r m a y b e a d d e d w i t h o u t a l t e r i n g t h e p e r f o r m a n c e o f t h e d e v i c e .

U s e t h e b o o s t c o n v e r t e r o f t h e T P A 2 0 1 3 D 1 t o s u p p l y t h e p o w e r f o r a n o t h e r a u d i o a m p l i f i e r w h e n s t e r e o o p e r a t i o n i s r e q u i r e d . E n s u r e t h e g a i n s o f t h e a m p l i f i e r s m a t c h e a c h o t h e r . T h i s p r e v e n t s o n e c h a n n e l f r o m s o u n d i n g l o u d e r t h a n t h e o t h e r . U s e E q u a t i o n 1 t h r o u g h E q u a t i o n 5 t o d e t e r m i n e R 1 , R 2 , b o o s t i n d u c t o r , a n d t h e b o o s t c a p a c i t o r v a l u e s . F i g u r e 3 2 i s a n e x a m p l e s c h e m a t i c . T h e T P A 2 0 3 2 D 1 i s a g o o d c h o i c e f o r t h i s a p p l i c a t i o n ; t h e g a i n i s i n t e r n a l l y s e t t o 2 V / V , t h e p o w e r s u p p l y i s c o m p a t i b l e w i t h V C CO U T o f t h e T P A 2 0 1 3 D 1 , a n d t h e o u t p u t p o w e r o f t h e T P A 2 0 3 2 D 1 i s o n p a r w i t h t h e T P A 2 0 1 3 D 1 .


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