STCS1A 查看數據表（PDF） - STMicroelectronics

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STCS1A

1.5 A max constant current LED driver

STMicroelectronics 

STCS1A

5

Timing

Figure 3. PWM and output current timing

Timing

PWM

90%

Current 10%

TD Trise

Figure 4. Block diagram

TD Tfall

VCC

EN

PWM

GND

High Voltage

45 V

Preregulator

3.3 V

Enable

Input

PWM

Input

Bandgap

1.23 V

Shutdown

all blocks

75 mV

Enable,

PWM &

Slope controll

Logic

Low Voltage 3.3 V

Thermal

Shutdown

+

- Disc

comp

H.V.

45 V

+

100 mV

Slope

Control

-

Comp

Logic

Driver

SLOPE

DISC

DRAIN

FB

7/19

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