HV9931LG-G 데이터 시트보기 (PDF) - Supertex Inc

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HV9931LG-G

Unity Power Factor LED Lamp Driver

Supertex Inc 

HV9931

Pin Description

Pin # Pin Name Description

1

VIN

This pin is the input of a high voltage regulator.

2, 7

CS1, CS2

These pins are used to sense the input and output currents of the converter. They are the

inverting inputs of the internal comparators.

3

GND

Ground return for all the internal circuitry. This pin must be electrically connected to the ground

of the power train.

4

GATE This pin is the output gate driver for an external N-channel power MOSFET.

When this pin is pulled to GND, switching of the HV9931 is disabled. When the PWMD pin

5

PWMD is released, or external TTL high level is applied to it, switching will resume. This feature is

provided for applications that require PWM dimming of the LED lamp.

6

VDD

This is a power supply pin for all internal circuits. It must be bypassed with a low ESR capacitor

to GND.

8

RT

Oscillator control. A resistor connected between this pin and GND sets the PWM frequency. A

resistor connected between this pin and GATE sets the PWM off-time.

7

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