_________________________________________________________________________________________________________

Copyright © 2015

Microsemi

Page 12 of 20

Rev.2.0, 17-Jan-2017

CPG

– PoE BU

One Enterprise Aliso Viejo, CA 92656 USA

PD70101 / PD70201

Datasheet

Typical Applications

+

-

+

-

RJ-45

CONNECTOR

VL

SYNC

Vout+

Vout-

Vout+

Vout-

VCC

VCC

ATFLAG

BR-1

BR-2

C1

68nF/100V

C2

10uF/63V

C3

2.2uF/100V

C4

10uF

25V

C5

100pF

100V

C11

0.1uF

10V

C10

0.1uF

25V

C6

22uF

25V

C7

10uF

25V

C12

22nF

25V

C8

22uF

25V

C9

10uF

25V

C13

1uF

25V

C14

1uF/10V

C15

150nF

6.3V

C14

10nF

6.3V

R1

0.5W

R2

4.7

R3

10k

R3

24.9k

R5

0.05

R6

0

R7

R8

R9

10k

R12

24.9k

R10

95.3k

R9

39k

U3

TL431

U2

U4

R13 412k

R14

12.4k

R15

392k

R16

10k

R17

10k

L1

10uH

(EMI)

L2

0.33uH

Notes:

Freq set for 250kHz

Turn On VPP ~ 42V and Off ~ 38V

Q1

FDS2582

SI7898DP

Q3

PN3906

Q2

FDS5680

D1

1A/50V

T1: Np/Ns = 2.5, Naux/Ns =1

LNp = 18uH +/- 15%

T2

PE-68386

R18

0

R19

40.2k

R20

Np

Ns

Naux

TO

EXTERNAL

POWER

GOOD

MONITOR

TO

EXTERNAL

ENABLE

U1

PD70201

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

RDET

PGOOD

RREF

RCLASS

VPN_IN

N/C

AT_FLAG

VPN_OUT

GND

FB

DAO

COMP

VSP

VSN

24

23

22

21

20

19

18

17

VL

32

31

30

29

28

27

26

25

SG

Figure 3 · 12V2A Output Isolated Fly-back with Secondary Synchronous Rectification