DC2539A-A – High Efficiency IEEE802.3bt (PoE++, Type 3 ...

1dc2539aafb

DEMO MANUAL DC2539A-A

Description

LT4295, LT4321 High Efficiency IEEE802.3bt (PoE++, Type 3, 51W) PD

with Flyback DC/DC Converter and Auxiliary Power Input

Demonstration circuit 2539A is an IEEE802.3bt (Draft 2.1) compliant Power over Ethernet (PoE) Powered Device (PD). It features the LT®4295 PD interface and switch-ing regulator controller and the LT4321 PoE ideal diode bridge controller.

The LT4295 provides IEEE802.3af (PoE, Type 1), IEEE802.3at (PoE+, Type 2), and IEEE802.3bt (PoE++, Type 3) compliant interfacing and power supply control. It utilizes an external, low RDS(ON) (57mΩ typical) N-channel FET for the hot swap function to improve efficiency. The LT4295 controls a DC/DC converter that utilizes a highly efficient Flyback topology with synchronous rectification.

The LT4321 controls eight low RDS(ON) (30mΩ typical) N-channel FETs to further improve end-to-end power

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.

performance summary

BoarD photos

delivery efficiency and ease thermal design. This solution replaces the eight diodes typically found in a passive PoE rectifier bridge.

The DC2539A-A accepts up to 51W of delivered power from a Power Sourcing Equipment (PSE) via the RJ45 connector (J1) or a local 48VDC power supply using the auxiliary supply input. When both supplies are connected, the auxiliary supply input has priority over the PoE input. The DC2539A-A supplies a 12V output at up to 3.9A.

Design files for this circuit board are available at http://www.linear.com/demo/DC2539A-A

Specifications are at TA = 25°C

Top Side Bottom Side

PARAMETER CONDITIONS VALUE

Port Voltage (VPORT) At RJ45 37V to 57V

Auxiliary Voltage From AUX+ to AUX– Terminals 37V to 57V

Output Voltage (VOUT) 12V (Typical)

Output Current (IOUT) 3.9A (Max)

Output Voltage Ripple VPORT = 42.5V, IOUT = 3.9A 54mVP-P (Typical)

Load Regulation ±0.4% (Typical)

Efficiency VPORT = 50V, IOUT = 3A, End-to-End 91.5% (Typical)

Switching Frequency 250kHz (Typical)

http://www.linear.com/LT4295

http://www.linear.com/product/LT4321

2dc2539aafb


typical performance characteristics

Top Side Bottom Side

Figure 2. Efficiency (End-to-End)

Figure 1. Thermal Pictures (Conditions: VPORT = 57V, VOUT = 12V, IOUT = 3.9A)

3dc2539aafb



Figure 3. Load Regulation

4dc2539aafb



Figure 5. Output Voltage Ripple (Conditions: VPORT = 42.5V, VOUT = 12V, IOUT = 3.9A)

Figure 4. Switch Node Waveforms (Conditions: VPORT = 57V, VOUT = 12V, IOUT = 3.9A)

5dc2539aafb



Figure 6. Load Transient Response (Conditions: VPORT = 42.5V, Load Step: 2A to 4A to 2A)

6dc2539aafb



Figure 7. Gain and Phase Margin of the Flyback DC/DC Converter (Conditions: VPORT = 57V, VOUT = 12V, IOUT = 3.9A)

CROSSOVER FREQUENCY GAIN MARGIN PHASE MARGIN

≈5.8kHz ≈20dB ≈63°

7dc2539aafb


Quick start proceDurePower Over Ethernet (PoE) Input

1 Disconnect auxiliary supply if it is connected to AUX+ and AUX– inputs of the DC2539A-A.

2 Place and connect test equipment (voltmeter, ammeter, oscilloscope, and electronic load) as shown in Figure 8.

3 Turn down the electronic load to a minimum value and turn off the electronic load.

4 Connect the output of the IEEE 802.3bt compliant PSE to the RJ45 connector (J1) of the DC2539A using a CAT5e or CAT6 Ethernet cable. (See note.)

5 After the LED (D4) on the DC2539A is lit, check the output voltage using a voltmeter. Output voltage should be within 12.0V±0.2V.

6 Turn on the electronic load and increase its load cur-rent up to 3.9A. Observe the output voltage regulation, efficiency, and other parameters.

7 Verify T2P response with an oscilloscope as shown in Figure 8. The T2P response to the type of PSE con-nected to the DC2539A-A is provided in Table 1.

Note: An 802.3bt PSE has not yet been released. In the interim, an LTPoE++® compliant PSE (DC1814A-B) may be used to provide power to the DC2539A-A. The LTPoE++ classification will not be 802.3bt compliant, but the PSE will provide a compatible detection and power output. Specifically, the T2P output of the DC2539A-A is different from the behavior stated in Table 1 and will indicate connection to a Type 2 PSE. Otherwise PD behavior will be unaffected.

Figure 8. Setup Diagram for PoE Input

IEEE802.3btPSE

CAT5eOR CAT6CABLE

+

–

DC POWERSUPPLY

+

–

VOLTMETER

+

– AMMETER

+

–

ELECTRONICLOAD

+

–

OSCILLOSCOPE

DC2539 F08

+

–

Table 1. T2P ResponsePSE T2P Response Negotiated PD Input Power

IEEE

Logic High 13W

Logic Low 25.5W

50% Logic High/50% Logic Low, Toggle at 976Hz ±7% 51W

LTPoE++, 52.7W Logic Low 51W

8dc2539aafb


Auxiliary Supply Input

1. Place and connect test equipment (voltmeter, ammeter, oscilloscope, and electronic load) as shown in Figure 9.

2. Turn down the electronic load to a minimum value and turn off the electronic load.

3. Connect the output of the auxiliary supply to the DC2539A as shown in Figure 9. Turn on the auxiliary supply and set its current limit to 2A. Then increase its output voltage to 48V.

Quick start proceDure4. Once the LED (D4) on the DC2539A is lit, check the

output voltage using a voltmeter. Output voltage should be within 12.0V±0.2V.

5. Turn on the electronic load and increase its load cur-rent up to 3.9A. Observe the output voltage regulation, efficiency, and other parameters.

6. Verify T2P response with an oscilloscope as shown in Figure 9. The T2P response during auxiliary power operation is: 75% Logic High/25% Logic Low, Toggle at 976Hz ±7%

VOLTMETER

+

– AMMETER

+

–

ELECTRONICLOAD

+

–

OSCILLOSCOPE

DC2539 F09

+

–

AUXILIARYSUPPLY

+ –

Figure 9. Setup Diagram for Auxiliary Supply Input

9dc2539aafb


ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

DC2539A General BOM

1 1 CG1 CAP, CER, X7R 1000pF 2kV 10% 1808 MURATA GR442QR73D102KW01L

2 1 CG2 CAP, CER, X7R 0.01µF 100V 20% 1206 AVX 12061C103MAT2A

3 0 C1 CAP, CER, OPT 2kV 1812 OPT

4 0 C5 CAP, CER, X7U OPT 6.3V 10% 1210 OPT

5 1 C6 CAP, ELEC, 10µF 100V 20% 6.3 × 7.7 SUNCON 100CE10KX

6 1 C7, C29 CAP, CER, X7R 2.2µF 100V 10% 1210 MURATA GRM32ER72A225KA35

7 1 C10 CAP, CER, X7R 10nF 100V 20% 0603 MURATA GRM188R72A103KA01D

8 2 C11, C12 CAP, CER, X7R 0.047µF 100V 10% 0603 KEMET C0603C473K1RACTU

9 1 C13 CAP, CER, X7R 10µF 10V 10% 1206 MURATA GRM31CR71A106KA01L

10 0 C15, C18, C19, C21 CAP, CER, X5R OPT 2kV 20% 1812 OPT

11 1 C17 CAP, CER, X7R 1µF 25V 10% 0603 MURATA GRM188R71E105KA12

12 1 C20 CAP, CER, X7R 2.2nF 25V 10% 0603 MURATA GRM188R71E222KA01

13 1 C23 CAP, CER, X7R 4.7nF 2kV 1812 MURATA GR443DR73D472KW01L

14 1 C26 CAP, CER, X7R 100pF 16V 0402 AVX, 0402YC101KAT2A

15 0 C27 CAP, CER, X7R OPT 6.3V 10% 0402 OPT

16 1 D1 DIODE, SCHOTTKY, PMEG10020 100V SOD128 NXP PMEG10020AELPX

17 3 D2, D16, D19 DIODE, TVS, PTVS58VS1UR 58V SOD123 NXP PTVS58VS1UR

18 1 D3 DIODE, ZENER, MMSZ5252BS 24V SOD323 DIODES INC MMSZ5252BS

19 1 D4 DIODE, LED GREEN ROHM SML-010FTT86L

20 1 D13 DIODE, SCHOTTKY, NXP, BAT46W 100V SOD323 NXP BAT46WJ,115

21 1 D15 DIODE, DIODE INC, BAV19WS 120V SOD323 DIODE INC BAV19WS

22 1 D17 DIODE, SCHOTTKY, PMEG1020EA 10V SOD323 NXP PMEG1020EA

23 8 E2, E3, E4, E5, E6, E9, E11, E12

TP, TURRET, PAD150-094 0.094" MILL-MAX 2501-2-00-80-00-00-07-0

24 1 J1 CONN, INTEGRATED JACK, 7499511001A WURTH 7499511001A

25 1 J2 CONN, RJ45 JACK, SS-6488-NF-K1 STEWART CONNECTOR SS-6488-NF-K1

26 2 J3, J4 CONN, BANANA, 575-4 0.175" KEYSTONE 575-4

27 1 L2 IND, 4.7µH WURTH 744316470

28 1 L4 IND, 100µH COILCRAFT DO1608C-104

29 0 L5 IND, OPT OPT

30 9 Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18

MOSFET, N-CH, PSMN075-100MSE 100 LFPAK33 NXP PSMN075-100MSE

31 1 Q1 MOSFET, N-CH, PSMN040-100MSE 100 LFPAK33 NXP PSMN040-100MSE

32 1 Q5 TRANSISTOR, PNP, PBSS5140T 40V SOT23 NXP PBSS5140T

33 1 Q6 TRANSISTOR, NPN, PBSS4140T 40V SOT23 NXP PBSS4140T

34 1 Q7 TRANSISTOR, PNP, FMMT723 100V SOT23 DIODES INC FMMT723TA

35 4 RT1, RT2, RT3, RT4 RES, CHIP, 75Ω 5% 0603 NIC NRC06J750TRF

36 1 R5 RES, CHIP, 8.2Ω 5% 0805 NIC NRC10J8R2TRF

37 1 R6 RES, CHIP, 3.3k 5% 0603 NIC NRC06J332TRF

38 1 R7 RES, CHIP, 20Ω 5% 0805 VISHAY CRCW080520R0JNEA

39 1 R12 RES, CHIP, 0Ω 5% 0603 NIC NRC06ZOTRF

parts list

10dc2539aafb


parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

40 1 R13 RES, CHIP, 100Ω 5% 0603 VISHAY CRCW0603100RFKEA

41 1 R15 RES, CHIP, 15Ω 5% 0603 NIC NRC06J150TRF

42 1 R17 RES, CHIP, 2.00k 1% 0603 NIC NRC06F2001TRF

43 1 R18, RES, CHIP, 10k 5% 0603 YAGEO RC0603JR-0710KL

44 1 R21 RES, CHIP, 174k 1% 0603 VISHAY CRCW0603174KFKEA

45 1 R22 RES, CHIP, 107k 1% 0603 NIC NRC06F1073TRF

46 2 R27, R31 RES, CHIP, 0Ω SHUNT 0402 NIC NRC04ZOTRF

47 1 R28 RES, CHIP, 0Ω SHUNT 0603 NIC NRC06ZOTRF

48 1 R29 RES, CHIP, 52.3k 1% 0603 VISHAY CRCW060352K3FKEA

49 0 R32 RES, CHIP, OPT 5% 1812 OPT


51 1 T3 XFMR, SMD GATE DRIVE, EPA4271GE PCA EPA4271GE

52 0 T3 (ALTERNATE) XFMR, SMD GATE DRIVE, PE-68386NL PULSE PE-68386NL

53 1 U3 IC, POE IDEAL BRIDGE CONTROLLER LT4321IUF QFN16

LINEAR TECH LT4321IUF

54 2 STENCIL (TOP & BOTTOM) STENCIL DC2539A

DC2539A-A

1 1 C2 CAP, CER, X5R 10µF 16V 10% 1210 MURATA GRM32DR61C106KA01

2 1 C3 CAP, CER, X5R 10µF 16V 10% 1210 MURATA GRM32DR61C106KA01

3 1 C4 CAP, ELEC, 47µF 35V 20% 6.0X5.8 PANASONIC EEH-ZA1V470P

4 1 C8 CAP, CER, U2J 330pF 630V 5% 1206 MURATA GRM31A7U2J331JW31

5 1 C9 CAP, CER, U2J 220pF 630V 5% 1206 MURATA GRM31A7U2J221JW31

6 1 C16 CAP, CER, X7R 1µF 25V 10% 0805 MURATA GRM21BR71E105KA99L

7 1 C22 CAP, CER, X7R 3.3nF 25V 10% 0603 AVX 06033C332KAT2A

8 1 C24 CAP, CER, X7R 0.1µF 25V 20% 0603 MURATA GRM188R71E104KA01D

9 1 C25 CAP, CER, X7R 330pF 25V 10% 0603 AVX 06033C331KAT2A

10 0 D18 DIODE, OPT 40V SOD323 OPT

11 1 L1 IND, 220nH WURTH 744316022

12 1 L3 IND, CMC, 6mH, COILCRAFT UA8085-AL

13 1 Q2 MOSFET, N-CH, 150V SOP ADVANCE TOSHIBA TPH1500CNH

14 1 Q4 MOSFET, N-CH, 150V SOP ADVANCE TOSHIBA TPH1500CNH






20 1 R10 RES, CHIP, 5.62k 1% 0603 VISHAY CRCW06035K62FKEA

21 1 R11 RES, CHIP, 5.23k 1% 0603 YAGEO RC0603FR-075K23L

11dc2539aafb


parts listITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

22 1 R14 RES, CHIP, 20mΩ 1% 2010 VISHAY WSL2010R0200FEA

23 1 R16 RES, CHIP, 0Ω, Shunt, 0805 VISHAY CRCW08050000Z0EA

24 1 R19 RES, CHIP, 47.5Ω 1% 0805 VISHAY CRCW080547R5FKEA

25 1 R20 RES, CHIP, 150Ω 1% 0805 VISHAY CRCW0805150RFKEA


27 1 R24 RES, CHIP, 30k 5% 0603 VISHAY CRCW060330K1JNEA

28 1 R25 RES, CHIP, 10k 5% 0603 YAGEO RC0603JR-0710KL



31 1 T1 XFMR, FLYBACK TRANSFORMER, EPC3633G PCA EPC3633G

32 0 T1 (ALTERNATE) XFMR, FLYBACK TRANSFORMER, 750316116 WURTH 750316116

33 1 U1 IC, PD & SWITCHER CONTROLLER, LT4295IUF QFN28

LINEAR TECH LT4295IUF

34 1 ISO1 IC, TRANSISTOR OUTPUT OPTOCOUPLER, SO4 TOSHIBA TLP291(GR-TP,SE)

35 4 MH1-MH4 STAND-OFF, NYLON 0.50" TALL (SNAP ON) KEYSTONE 8833

36 1 FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 2539A

12dc2539aafb


schematic Diagram5 5

4 4

3 3

2 2

1 1

DD

CC

BB

AA

VPO

RTP

-VO

UT

+VO

UT

VPO

RTN

GN

D OPTI

ONAL

COM

PONE

NTS

37V-

57V

T2P

___

AUX+

AUX-

12V/

3.9A

FLYB

ACK

DC-D

C CO

NVER

TER

AND

AUXI

LIAR

Y PO

WER

INPU

T

VPR

I_SG

SG

VPRI

_SW

PG

VSEC

_SWVS

EC_P

VPRI

_P

PG

VSEC

_SG

FBVS

EC_P

VAU

X_P

FB

+VO

UT

+VO

UT

VPO

RTP

VCC

VCC

+VO

UT

VPO

RTP

VPO

RTN

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

12

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

12

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

12

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

D13

BAT4

6WJ,

115

1 2

Q1

PSM

N04

0-10

0MSE

6

4

58 7123

4.7u

HL2

WU

RTH

7443

1647

0

R26

4.7K

3.3n

F

C22

1uF

C16

0805

R33

OPT

expo

sed

pad,

sol

der

side

U1

LT42

95IU

FD

VPORT28

HSGATE26

HSSRC25

SWVCC23

DNC22

VCC21

VIN24

PG20

FB31

14

ISE

N-

16

ISE

N+

17

SG18

AU

X2

RC

LAS

S++

3

RC

LAS

S4

GND19

VCC6

VCC7

VCC8

T2P5

SFST11

RLDCMP15

VCC9

GND1

ITH

B13

FFSDLY12

NC27

ROSC10

GND_EP29

PBSS

4140

TQ

6 1

23

R20

150

0805

R18

10K

E11

D16

PTVS

58VS

1UR

21

R23

OPT

Q7

FMM

T723

32

1

E3

R10

5.62

KO

PTC

19

T1 EPC

3633

G-L

F

1

1186 4

7 12

5 2 3

PBSS

5140

TQ

5 1

23

R25

10K

Q2

TPH

1500

CN

H

6

4

5

87

123

R22

107K

R16

0 0805

D1

PMEG

1002

0

21

R17

2.00

K

220p

FC

9

1206

R6

3.3K

OPT

C21

R19

47.5 08

05

R9

3912

06

L3

6mH

UA8

085-

BL

43 2

1

220n

HL1

7443

1602

2

R3

75 1206

E9

C10

10nF 100V

2.2u

F10

0V12

10X7

R

C29

Q4

TPH

1500

CN

H

6

4

5

87

123

330p

F

C25

R15 15

R30

OPT

0805

R5

8.2

0805

R27 0

R31

0

D18

OPT

2 1

EPA4

271G

E

T31 3

6 4

C2

X5R

16V

1210

10uF

E4

ISO

1TL

P291

(GR

-TP,

E)

1 2

4 3

D17

PMEG

1020

EA

21

E2

2.2u

F10

0V12

10X7

R

C7

R7

20 0805

R14

20m

2010

E12

R4

75 1206

J4

0.04

7uF

C12 100V

HSS

OPT

L5

4.7n

FC

23

330p

FC

8

1206

2.2n

FC

20

R35

OPT

1uF

C17

+C

447

uF35

VEE

H-Z

A1V4

70P

R21

174K

R12 0

R11

5.23

K

100u

H

L4D

O16

08C

-104

+10

uF10

0V6.

3x7.

7

C6

D15

BAV1

9WS

21

R24

30K

R29

52.3

K

D4

LE

D

E6

+C

5O

PT

OPT

C1

OPT

C15

OPT

C27

6.3V

D19

PTVS

58VS

1UR

21

10uF

C13 10

V12

06

E5R

34

0

OPT

C18

C3

10uF

1210

X5R

16V

J3

R32

OPT

R8

3912

06

100p

FC

26

25V

0.1u

FC

24

R2 1.5K

R13

100

13dc2539aafb


Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

schematic Diagram5 5

4 4

3 3

2 2

1 1

DD

CC

BB

AA

OU

T T

OPH

Y

IN F

RO

MPo

E+PS

E

PoE

IDEA

L D

IOD

E B

RID

GE

FLYB

ACK

DC-D

C CO

NVER

TER

AND

AUXI

LIAR

Y PO

WER

INPU

T

PO

E_C

T45

PO

E_C

T78

POE_

CT1

2

POE_

CT3

6

BG12

BG36

POE_

CT3

6

TG36

TG45

POE_

CT4

5PO

E_C

T12

POE_

CT7

8

TG12

BG45

TG45

BG36

TG36

BG12

TG78

BG78

VPOR

TN

BG78

POE_CT78

TG78

POE_

CT4

5

POE_CT12

POE_

CT3

6

TG12

BG45

VPOR

TN

VPOR

TP

VPO

RTN

VPO

RTP

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

REVI

SION

HIS

TORY

DESC

RIPT

ION

DATE

APPR

OVED

ECO

REV

KAUN

G H.

PROD

UCTI

ON1

29-

20-2

016

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

22

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

22

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

SIZE

DATE

:

IC N

O.RE

V.

SHEE

TOF

TITL

E:

APPR

OVAL

S

PCB

DES.

APP

ENG.

TEC

HN

OLO

GY

Fax:

(408

)434

-050

7

Milp

itas,

CA 95

035

Phon

e: (4

08)4

32-1

900

1630

McC

arth

y Blvd

.

LTC

Conf

iden

tial-F

or C

usto

mer

Use

Onl

y

CUST

OMER

NOT

ICE

LINE

AR T

ECHN

OLOG

Y HA

S MA

DE A

BES

T EF

FORT

TO

DESI

GN A

CIRC

UIT

THAT

MEE

TS C

USTO

MER-

SUPP

LIED

SPE

CIFI

CATI

ONS;

HOW

EVER

, IT

REMA

INS

THE

CUST

OMER

'S R

ESPO

NSIB

ILIT

Y TO

VERI

FY P

ROPE

R AN

D RE

LIAB

LE O

PERA

TION

IN T

HE A

CTUA

LAP

PLIC

ATIO

N. C

OMPO

NENT

SUB

STIT

UTIO

N AN

D PR

INTE

DCI

RCUI

T BO

ARD

LAYO

UT M

AY S

IGNI

FICA

NTLY

AFF

ECT

CIRC

UIT

PERF

ORMA

NCE

OR R

ELIA

BILI

TY.

CONT

ACT

LINE

ARTE

CHNO

LOGY

APP

LICA

TION

S EN

GINE

ERIN

G FO

R AS

SIST

ANCE

.

THIS

CIR

CUIT

IS P

ROPR

IETA

RY T

O LI

NEAR

TEC

HNOL

OGY

AND

SCHE

MATI

C

SUPP

LIED

FOR

USE

WIT

H LI

NEAR

TEC

HNOL

OGY

PART

S.SC

ALE

= NO

NE

www.

linea

r.com 2

Tues

day,

Septe

mber

20, 2

016

22

HIGH

EFF

ICIE

NCY

IEEE

802.3

bt (P

oE++

, Typ

e 3, 5

1W) P

D W

ITH

K. H

TOO

K. H

TOO

N/A

LT42

95IU

FD, L

T432

1IUF

DEMO

CIR

CUIT

2539

A-A

1 2 3 6 4 5 7 8

4 X

12n

F

4 X

75

Ohm

s

1nF

2kV

J1 7499

5110

01A

TRD

1+11

TRC

T112

TRD

1-10

TRD

2+4

TRC

T26

TRD

2-5

TRD

3+3

TRC

T31

TRD

3-2

TRD

4+8

TRC

T47

TRD

4-9

VC

214

VC

113

VC

315

VC

416

SH

IELD

17S

HIE

LD18

CT3

6

D3

MM

SZ52

52BS

24V

21

CG

110

00pF

1808

2KV

Q17

PSM

N07

5-10

0MSE

6

4

5

87

123

D2

PTVS

58VS

1UR

21

Q11

PSM

N07

5-10

0MSE

6

4

5

87

123

CT4

5

RT4

75

CT7

8

R28 0

Q18

PSM

N07

5-10

0MSE

6

4

5

87

123

CG

20.

01uF

100V

1206

Q12

PSM

N07

5-10

0MSE

6

4

5

87

123

Q13

PSM

N07

5-10

0MSE

6

4

5

87

123

J2 SS-6

488S

-A-N

F

1 2 3 4 5 6 7 8

9 10

Q14

PSM

N07

5-10

0MSE

6

4

5

87

123

C11

0.04

7uF

100V

Q15

PSM

N07

5-10

0MSE

6

4

5

87

123

RT1

75

Q16

PSM

N07

5-10

0MSE

6

4

5

87

123

RT3

75

EP

U3

LT43

21IU

F

TG36

1

IN36

2

IN45

3

TG45

4

TG785

IN786

BG787

BG458

OU

TP12

EN

11

EN

10

OU

TN9

TG1216

IN1215

BG1214

BG3613

17O

UTN

CT1

2

RT2

75

14dc2539aafb


© LINEAR TECHNOLOGY CORPORATION 2016

LT 0517 REV B • PRINTED IN USA

DEMONSTRATION BOARD IMPORTANT NOTICE

Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:

This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.

If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).

No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.

LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.

Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.

This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer.

Mailing Address:

Linear Technology

1630 McCarthy Blvd.

Milpitas, CA 95035

Copyright © 2004, Linear Technology Corporation

DC2539A-A – High Efficiency IEEE802.3bt (PoE++, Type 3 ...

Documents

Transcript of DC2539A-A – High Efficiency IEEE802.3bt (PoE++, Type 3 ...