AN1934 datasheet(8/32 Pages) STMICROELECTRONICS

Part #	AN1934

Description	This circuit can be used to produce multiple outputs

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Circuit description

AN1934

8/32

DocID10353 Rev 2

C5

1

10 µF electrolytic capacitor, Nippon Chemi-Con, KME 50 V

20%

C6

1

100 pF ceramic capacitor, X7R, 500 V C1206 10%

C8

1

22 nF ceramic capacitor, X7R, 50 V C0805 10%

C9

1

(1, 4)

100 nF ceramic capacitor, X7R, 50 V C0805 10%

C10

1

(1, 4)

1 nF ceramic capacitor, X7R, 50 V C0805 10%

C11

1

(2) (3)

2.2 µF tantalum capacitor, size A, B45196E, 10 V 7.0R 20%

100 nF ceramic capacitor, X7R, 50 V C1206 10%

D1, D2

2

GL1M diode, Diotec, trr=1.5 µs 1000 V 1 A, MiniMELF

D4

1

STPR120A diode, fast recovery trr=25 ns 200 V 1 A SMA

D5

1

(1, 2, 4)

(3)

STPS1L40A diode, Schottky, 40 V 1 A, SMA

0R resistor, metal film, R1206

D6

1

Optional

ST PKC-136 diode, peak clamp, VBR=160 V, 700 V, 1.5 W

DO-15

D7

1

LL4148 diode 75 V 200 mA

D8

1

(2, 3)

ZMM13 Zener diode, 13 V 0.5 W 5%

L1

1

330 µH inductor, EPCOS, bobbin core, B78108-S1334-J,

190 mA 6.4R 10%

Q1, Q2

2(1, 4)

BC856B bipolar transistor, PNP, 65 V 100 mA 330 mW

R1

1

10R resistor, Yageo, wirewound, fusible, TK120 CRF 254-4

3 W 5%

R2, R5, R7,

R8

4(1, 4)

4.7 K resistor, metal film, 100 V 0.125 W R0805 1%

R3

1

100 R resistor, metal film, 200 V 0.25 W R1206 1%

R4

1

(2, 3)

0R resistor, metal film, R1206

R6

1

Optional

24 K resistor, metal film, R0805, 100 V 0.125 W 1%

R9

1

(1, 4)

470 R resistor, metal film, R0805, 100 V 0.125 W 1%

R10

1

(1, 4)

1 K resistor, metal film, R0805, 100 V 0.125 W 1%

R17

1

0R resistor, metal film, R1206

T1

1

(1, 3, 4)

(2)

Ns=16/9 turns transformer, Vogt ferrite Fi324, EF16/4.7,

order number 545 23 249 00

Ns=14/11 turn transformer, Vogt ferrite Fi324, EF16/4.7,

order number 545 23 249 00

U1

1

VIPer12A-E, 730 V 0.4 A, 27R, f=60 kHz, SO-8

U2

1

(1, 4)

TS2431ILT shunt ref. IC, 2.5 V 1 mA to 100 mA 360 mW 2%

Table 2. Bill of material for all variants of non-isolated flyback converter (continued)

Reference

Quantity

Variant

Description

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