TSM1121 查看數據表（PDF） - STMicroelectronics

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TSM1121

3.3V 5V 12V HOUSEKEEPING IC

STMicroelectronics 

TSM1121

Fig. 1: Application Schematic

~

PRIMARY

RECT.

MAIN

CONV.

12V

5V

3.3V

PWM + OPTO

+ Vref

Electrical Characteristics

12V

5V

3.3V

AUX.

CONV.

Vcc

5Vstby

5Vstby

PWM + OPTO

+ Vref

FAULT

TSM1121

Over & Undervoltage Protection

Reference

Logic

Sequencer

PG

REM

Fig. 2: Internal Schematic

TO

POWER

SUPPLY

OUTPUT

12V

5V

3.3V

FROM

MAIN

CONV.

12V

5V

3.3V

Vs12

Vs5

Vs33

Ep

Vcc

TSM1121

OVP

UVP

LOGIC

SECONDARY

HOUSEKEEPING

PI

PG

FAULT

REM

Trem

Tpg

Vref

Vref

UV

Tuv

BLANK

Gnd

4/11

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