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PT6903 Datasheet with Chat AI

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Part No.	PT6903_10
Manufacturer	PTC
Size	233 Kbytes
Pages	4 pages
Description	High Brightness LED Driver

Datasheet Summary with AI

· Temperature Compensation (SOP8 Package): Uses NTC thermistor via LD pin to reduce current when temperature rises; voltage on LD pin falls below 240mV.

## Pin Descriptions
· RT: Fixed off-time setting resistor
· CS: LED string current sense
· GND: Ground
· SW: Internal switch
· VIN: Positive input supply voltage
· PWMD: PWM dimming & enable input
· VDD: Internal regulated voltage
· LD: Linear dimming (SOP8 only)

## Order Information
· PT6903-S: 8-Pin SOP
· PT6903: 5-Pin TO252

# PT6903 High Brightness LED Driver

## Features
· Efficiency: >90%
· Input Voltage: 7V to 36V
· Driver Type: Constant Current
· Output Current: Up to 1.0A
· Dimming: Linear & PWM
· Protection: Thermal Shutdown, Over Current
· Switch: Internal 40V Power NMOS

## Applications
· DC/DC LED Driver
· Low Voltage Industrial LED Lighting
· Low Voltage Halogen Replacement LEDs
· Decorative LED Lighting

## Protection Features
· Over Current Protection: Activates on short circuit or current exceeding 2x setting; requires power cycle to reset.
· Thermal Shutdown: Turns off switch at 135°C, turns on at 115°C.
· Temperature Compensation (SOP8 Package): Uses NTC thermistor via LD pin to reduce current when temperature rises; voltage on LD pin falls below 240mV.

## Pin Descriptions
· RT: Fixed off-time setting resistor
· CS: LED string current sense
· GND: Ground
· SW: Internal switch
· VIN: Positive input supply voltage
· PWMD: PWM dimming & enable input
· VDD: Internal regulated voltage
· LD: Linear dimming (SOP8 only)

## Order Information
· PT6903-S: 8-Pin SOP
· PT6903: 5-Pin TO252