AN728 データシートの表示（PDF） - Vishay Semiconductors

部品番号

コンポーネント説明

メーカー

AN728

Designing A Flyback Converter with Si9113 for Feeding the TE from U-Interface In ISDN

Vishay Semiconductors 

AN728

Vishay Siliconix

D Quiescent Current: The Si9113 uses a BiCMOS process

to keep the control circuit operating current at low level.

The power dissipated in the controller and MOSFET

driver is equivalent to VCC multiplied by ICC. Keep the

worst-case low value of VCC just above the internal

regulator voltage of 9.5 V. Also, make sure that the

bootstrap voltage is always more than the maximum

value of the internal regulator. Otherwise, more power will

be dissipated in the internal depletion MOSFET.

D Other-Care should be taken to restrict the losses in the

current and voltage sensing network, secondary

rectifiers, and input and output capacitors. Refer to

Vishay Siliconix application note AN704 for instructions

on calculating power loss in the converter.

28 – 99 V

+VIN

BR1

4

1

AC +

3

2

AC –

–VIN

DF02S

+ C1

22 mF

160 V

R13

D1

T1

XFMR_LPE9080

1 D2

ESIG

NS2

C10

2.2 mF

50 V

6

3

40 V/12 mA

3

+

D4*

BZX84C43

1

R9

20 kW

R10

13 kW

C4

1 mF

C5

0.1 mF

2.7 W

3.3 V/120 mA

ESIG

7

NP

NS3

D3 9

5

C12

0.1 mF

C11

220 mF

6.3 V

B130LB

8

R1 8

1 MW 9

C7

10

0.001 mF 11

C6

0.1 mF 12

13

R2

C8 14

300 kW 0.01 mF

OSCIN

OSCOUT

SS

VREF

FB

COMP

START

7

VCC

6

DR

5

GND

4

PWR_G

3

ICS

2

VIN

1

STOP

Si9113

C13

100 pF

R4

COM1

R3

5.1 MW

3 (Q01)

C9

0.01 mF

R11

1 kW

C3

220 pF

1, 2, 5, 6, (Q01)

Q01 Si3420DV

4 (Q01)

R7

2W

1/2 W

COM2

R5

3.96 MW

1 MW

FIGURE 6. Dual Output Flyback converter with Tightly Regulated Main Output

Document Number: 71120

29-Feb-00

www.vishay.com S FaxBack 408-970-5600

5

Share Link: