SMA7029M.pdf

5SLA7022MU/SLA7029M/SMA7022MU/SMA7029M

Parameter SymbolRatings

UnitsSLA7022MU SLA7029M SMA7022MU SMA7029MMotor supply voltage VCC 46 VFET Drain-Source voltage VDSS 100 VControl supply voltage VS 46 VTTL input voltage VIN 7 VReference voltage VREF 2 VOutput current IO 1 1.5 1 1.5 A

Power dissipation PD1 4.5 (Without Heatsink) 4.0 (Without Heatsink) WPD2 35 (TC=25C) 28(TC=25C) W

Channel temperature Tch +150 CStorage temperature Tstg 40 to +150 C

Absolute Maximum Ratings

2-Phase Stepper Motor Unipolar Driver ICsSLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Excitation

(Ta=25C)

RatingsParameter Symbol SLA7022MU SLA7029M SMA7022MU SMA7029M Units

min typ max min typ max min typ max min typ max

Control supply currentIS 10 15 10 15 10 15 10 15

mACondition VS=44V VS=44V VS=44V VS=44VControl supply voltage VS 10 24 44 10 24 44 10 24 44 10 24 44 VFET Drain-Source VDSS 100 100 100 100

Vvoltage Condition VS=44V, IDSS=250 A VS=44V, IDSS=250 A VS=44V, IDSS=250 A VS=44V, IDSS=250 A

FET ON voltageVDS 0.85 0.6 0.85 0.6

VCondition ID=1A, VS=14V ID=1A, VS=14V ID=1A, VS=14V ID=1A, VS=14V

FET drain leakage currentIDSS 4 4 4 4

mACondition VDSS=100V, VS=44V VDSS=100V, VS=44V VDSS=100V, VS=44V VDSS=100V, VS=44VFET diode forward VSD 1.2 1.1 1.2 1.1

Vvoltage Condition ID=1A ID=1A ID=1A ID=1A

IIH 40 40 40 40 A

TTL input currentCondition VIH=2.4V, VS=44V VIH=2.4V, VS=44V VIH=2.4V, VS=44V VIH=2.4V, VS=44V

IIL 0.8 0.8 0.8 0.8mACondition VIL=0.4V, VS=44V VIL=0.4V, VS=44V VIL=0.4V, VS=44V VIL=0.4V, VS=44V

VIH 2 2 2 2TTL input voltage Condition ID=1A ID=1A ID=1A ID=1A

V(Active High) VIL 0.8 0.8 0.8 0.8Condition VDSS=100V VDSS=100V VDSS=100V VDSS=100VVIH 2 2 2 2

TTL input voltage Condition VDSS=100V VDSS=100V VDSS=100V VDSS=100VV

(Active Low) VIL 0.8 0.8 0.8 0.8Condition ID=1A ID=1A ID=1A ID=1A

Tr 0.5 0.5 0.5 0.5Condition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1A

Switching timeTstg 0.7 0.7 0.7 0.7

sCondition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1ATf 0.1 0.1 0.1 0.1

Condition VS=24V, ID=0.8A VS=24V, ID=1A VS=24V, ID=0.8A VS=24V, ID=1A

Electrical Characteristics (Ta=25C)

DC characteristics

AC cha

racteristics

6 SLA7022MU/SLA7029M/SMA7022MU/SMA7029M

SLA7022MU/SLA7029M/SMA7022MU/SMA7029M2-Phase Stepper Motor Unipolar Driver ICs (2-Phase Excitation)

Internal Block Diagram

Diagram of Standard External Circuit (Recommended Circuit Constants)

6

Reg Reg

1 5 8

VS

14

INB

INA

7

RSA

2 3 4 12 13 11

TDA

REFA

GNDA

GNDB

REFB

TDB

RSB

9

10 15

+

+

+

+

1, 6, 10, 15pinDescription of pins

Excitation inputActive HOUT AOUT AOUT BOUT B

1pin6pin10pin15pin

Active LOUT AOUT AOUT BOUT B

8 1 6 10 15VS

RSA REFA REFB RSB GA GB7 3 13 9 4 12

C4

r6r5

r2

r1r4r3

C1 C2

TdATdB

INA

INB

INA

INB

5

14

+

VCC (46V max)

Vb (5V)

RsRsC3

11

2

Opencollector

tdA tdB

Excitation signal time chart2-phase excitation

clock 0 1 2 3 0 1INA H H L L H HINB L H H L L H

1-2 phase excitationclock 0 1 2 3 4 5 6 7 0 1 2 3INA H H H H L L L L H H H HtdA L L L H L L L H L L L HINB L L H H H H L L L L H HtdB L H L L L H L L L H L L

tdA and tdB are signals before the inverter stage.r1 : 510r2 : 100 (VR)r3 : 47kr4 : 47kr5 : 2.4kr6 : 2.4kC1 : 330 to 500pFC2 : 330 to 500pFC3 : 2200pFC4 : 2200pFRs : 1.8 typ(7022MU)

1 typ(7029M)(1 to 2W)



External Dimensions SLA7022MU/SLA7029M (Unit: mm)

310.224.40.216.40.2

3.20.15

160

.2

130

.2

9.9

0.2 Part No.

Lot No.

3.20.153.8 4.80.21.70.1

2.450.2

R-End 6.70

.5

9.7+

10.5

(3)

0.55+0.20.1

40.71.15+0.2

0.1

14P2.030.7=28.421.0

0.65+0.20.1

31.30.2

Forming No. No.853

1 2 3 15 123 15

Forming No. No.855

14P2.030.4=28.420.8

0.65 +0.20.1

30.6

0.55

+0.2

0.1

2.20.46.30.67.50.6

4.6

0.6

1.6

0.6

Epoxy resin package

1.15 +0.20.1

(Unit: mm) External Dimensions SMA7022MU/SMA7029MA

Forming No. No.1054

310.2

Part No.Lot No.

40.22.50.2

1.450.15

6.70

.5

(9.7)

(3)

0.55+0.20.1

40.7

P2.030.114=28.42

0.65+0.20.1

1 2 3 15123 15

P2.030.114=28.42

1.160.15

30.6

0.55

+0.2

0.11.20.1

(5.9)

(4.6)

1.6

0.6

1.16+0.20.1

30

0.620.1

(7.5)

Epoxy resin package

8.5ma

x

10.20

.2

31.3+0.2

Forming No. No.1055



Determining the Output CurrentFig. 1 shows the waveform of the output current (motor coil cur-rent). The method of determining the peak value of the outputcurrent (IO) based on this waveform is shown below.(Parameters for determining the output current IO) Vb: Reference supply voltage r1,r2: Voltage-divider resistors for the reference supply voltage RS: Current sense resistor(1) Normal rotation modeIO is determined as follows when current flows at the maximumlevel during motor rotation. (See Fig.2.)

(2) Power down modeThe circuit in Fig.3 (rx and Tr) is added in order to decrease thecoil current. IO is then determined as follows.

Equation (2) can be modified to obtain equation to determine rx.

Fig. 4 and 5 show the graphs of equations (1) and (2) respec-tively.

(NOTE)Ringing noise is produced in the current sense resistor RS whenthe MOSFET is switched ON and OFF by chopping. This noiseis also generated in feedback signals from RS which may there-fore cause the comparator to malfunction. To prevent choppingmalfunctions, r5(r6) and C3(C4) are added to act as a noise filter.

RS

C3r2

r1r6

r5

Vb(5V)

7,(9)

3,(13)

Fig. 2 Normal mode

0

Phase A

Phase A

IO

Fig. 1 Waveform of coil current (Phase A excitation ON)

RS

C3r2

r1r6

r5

Vb(5V)

7,(9)

3,(13)rx

TrPower downsignal

Fig. 3 Power down mode

4

3

2

1

00 1 2 3 4Current sense resistor RS ()

Outpu

t current IO

(A)

IO= r1+r2 RS

r1=510r2=100rx=Vb=5V

r2

Vb

Fig. 4 Output current IO vs. Current sense resistor RS Fig. 5 Output current IOPD vs. Variable current sense resistor rx

2.0

1.5

1.0

0.5

00 200 400 600 800

Variable current sense resistor rX ()

Outpu

t current IO

PD (A)

1000 1200

RS =0.5

RS =0.8RS =1

IOPD= 1+ RS

r1=510r2=100Vb=5V

1

Vbr1(r2+rX)r2 rX

Application Notes

However, when the values of these constants are increased,the response from RS to the comparator becomes slow. Hencethe value of the output current IO is somewhat higher than thecalculated value.

rX= 1 VbRs IOPD

1r1

1 1r2

................................................................ (1)IO r2r1+r2

VbRS

......................................................... (2)IOPD 1r1(r2+rX) r2 rX

VbRS

1+



Determining the chopper frequencyDetermining TOFFThe SLA7000M and SMA7000M series are self-excited chop-pers. The chopping OFF time TOFF is fixed by r3/C1 and r4/C2connected to terminal Td.TOFF can be calculated using the following formula:

The circuit constants and the TOFF value shown below are rec-ommended.TOFF = 12s at r3=47k, C1=500pF, Vb=5V

60

50

40

30

20

10

00 2 4 6 8 10 12 14 16

15

20

25

303540

Motor coil resistance Rm ()

ON tim

e TO

N ( s

)

VCC

=24V

VCC =36V

Chop

ping

freq

uency f (k

Hz)

TOFF =12 sRS =1 Lm

=1~3ms Rm

= =r3 C1

r4 C2

47k 500pF

Fig. 6 Chopper frequency vs. Motor coil resistance

Chopper frequency vs. Supply voltage

0

f (kHz

)

VCC (V)

50

40

30

20

10

010 20 30 40 50

Motor : 23LM-C202IO = 0.8A at VCC=24VRS=1

Chopper frequency vs. Output current

0

f (kHz

)

IO (A)

50

40

30

20

10

00.2 0.4 0.6 0.8 1.0

Motor : 23LM-C202VCC=24VRS=1

TOFFr3 C1 n (1 =r4 C2 n (1 )r r2Vb

2Vb



35

30

25

20

15

10

5

0200 500 1K

Case te

mpe

rature rise TC

a (C

)

Motor : PH265-01BMotor current IO=0.8ATa=25CVCC=24V, VS=24V2-phase excitation

Response frequency (pps)

Without heatsinkNatural cooling

TC ( 4 pin)

30

25

20

15

10

5

0200 500 1K

Case te

mpe

rature rise TC

a (C

)




TC ( 4 pin)

35

30

25

20

15

10

5

0200 500 1K

Case te

mpe

rature rise TC

a (C

)




TC ( 4 pin)

30

25

20

15

10

5

0200 500 1K

Case te

mpe

rature rise TC

a (C

)




TC ( 4 pin)

Thermal characteristics

SLA7022MU SLA7029M

SMA7022MU SMA7029MU

Thermal DesignAn outline of the method for calculating heat dissipation is shown below.(1)Obtain the value of PH that corresponds to the motor coil

current IO from Fig. 7 "Heat dissipation per phase PH vs. Out-put current IO."

Output current IO (A)

Hea

t diss

ipation pe

r pha

se P

H (W

)

Motor : 23LM-C004Holding mode

0 0.2 0.4 0.6 0.8 1.0

1.2

1.0

0.8

0.6

0.4

0.2

0

VCC =44V

36V

24V15V

Tja

TCa

Tj

10 2 3 4

TC

Natural coolingWithout heatsink

150

100

50

0

Total Power (W)

(C)

Fig. 7 Heat dissipation per phase PH vs. Output current IO

Fig. 8 Temperature rise

(2)The power dissipation Pdiss is obtained using the following formula.2-phase excitation: Pdiss 2PH+0.015VS (W)1-2 phase excitation: Pdiss PH+0.015VS (W)

(3)Obtain the temperature rise that corresponds to the calcu-lated value of Pdiss from Fig. 8 "Temperature rise."

1.2

1

0.8

0.6

0.4

0.2

00 0.2 0.4 0.6 0.8 1.0

Hea

t diss

ipation pe

r pha

se P

H

(W)

Output current IO (A)

36V

24V

15V

VCC

=44V

Motor : 23LM-C202Holding mode

Tja

TCa

Tj

10 2 3 4 5

TCNatural coolingWithout heatsink

150

100

50

0

Total Power (W)

(C)

SLA7022MU, ASMA7022MU

SLA7000M series

SLA7029M, SMA7029M

SMA7000M series

32



0

Supp

ly curre

nt I C

C (m

A)

Supply voltage VCC (V)

500

400

300

200

100

0 10 20 30 40 50

Motor : 23LM-C2021-phase excitationHolding modeIO : Output current

IO=1A

0.4A0.2A

Supply Voltage VCC vs. Supply Current ICC

SLA7022MU, SMA7022MU

0

Supp

ly curre

nt I C

C (m

A)

Supply voltage VCC (V)

500

400

300

200

100

010 20 30 40 50

0.2A0.5A

IO=1A

Motor : 23LM-C0041-phase excitationHolding modeIO : Output current

SLA7029M, SMA7029M

100

Pull-o

ut to

rque

(kg-cm

)


2.0

1.5

1.0

0.5

0 5K1K500

Motor : 23LM-C202 Output current IO =0.8AMotor supply voltage VCC =24V2-phase excitation

Torque Characteristics

SLA7029M, SMA7029M

100

Pull-ou

t torqu

e (kg

-cm)


2.0

1.5

1.0

0.5

0 5K1K500

Motor : PX244-02 Output current IO =0.6A Motor supply voltage VCC =24V2-phase excitation

SLA7022MU, SMA7022MU

SMA7029M.pdf

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