TSM121 查看數據表（PDF） - STMicroelectronics

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TSM121

SINGLE CHIP PWM & HOUSEKEEPING IC FOR HALF BRIDGE SMPS

STMicroelectronics 

TSM121

When the Error Amplifier output (FB) is low, the

C1 / C2 outputs duty cycle is high.

When the Error Amplifier output (FB) is high, the

C1 / C2 outputs duty cycle is low.

Figure 4 :

When the Soft Start input (SS/DTC) is low, the C1

/ C2 outputs duty cycle is high.

When the Soft Start input (SS/DTC) is high, the C1

/ C2 outputs duty cycle is low.

PWM GENERATOR

FB

PWM

OSC

OSCILLATOR

CK

SSDTC

SS

DQ

CK

!Q

FAULT

C1

A

C2

B

OSC

FB SS

PWM

SSDTC

CK

Q

!Q

A

B

C1

C2

SS

OSC

FB

C1

C2

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