HV9803LG Ver la hoja de datos (PDF) - Supertex Inc

Número de pieza

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Fabricante

HV9803LG

LED Driver IC with Average-Mode Constant Current Control

Supertex Inc 

HV9803

Pin Description (8-Lead SOIC)

Pin Name Description

1

CS

This pin is the current sense pin used to detect the MOSFET source current by means of an external

sense resistor.

2

VDD

This is the power supply input for the GATE output and input of the low-voltage regulator powering the

internal logic. It must be bypassed with a low ESR capacitor to GND (at least 0.1μF).

3

GND

Ground return for all 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.

5

RT A resistor connected between RT and GND programs the GATE off-time.

6

PWMD

This is the PWM dimming input of the IC. When this pin is pulled to GND, the gate driver is turned off.

When the pin is pulled high, the gate driver operates normally.

7

UVLO

This pin is the under-voltage comparator input. It is also used to form a short-circuit protection skip

delay.

8

LD This pin is the reference voltage input for programming the LED current.

Doc.# DSFP-HV9803

NR012313

Supertex inc.

6

www.supertex.com

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