HV9910B(2007) 查看數據表（PDF） - Supertex Inc

零件编号

产品描述 (功能)

生产厂家

HV9910B
(Rev.:2007)

Universal High Brightness LED Driver

Supertex Inc 

HV9910B

Universal High Brightness LED Driver

Features

General Description

► Switch mode controller for single switch LED drivers

► Enhanced drop-in replacement to the HV9910

► Open loop peak current controller

► Internal 8.0V to 450V linear regulator

► Constant frequency or constant off-time operation

► Linear and PWM dimming capability

► Requires few external components for operation

Applications

► DC/DC or AC/DC LED driver applications

► RGB backlighting LED driver

► Back lighting of flat panel displays

► General purpose constant current source

► Signage and decorative LED lighting

► Chargers

The HV9910B is an open loop current mode control LED driver

IC. The HV9910B can be programmed to operate in either a

constant frequency or constant off-time mode. It includes an

8 – 450V linear regulator which allows it to work from a wide

range of input voltages without the need for an external low

voltage supply. The HV9910B includes a PWM dimming input

that can accept an external control signal with a duty ratio of 0

– 100% and a frequency of up to a few kilohertz. It also includes

a 0 – 250mV linear dimming input which can be used for linear

dimming of the LED current.

The HV9910B is ideally suited for buck LED drivers. Since

the HV9910B operates in open loop current mode control, the

controller achieves good output current regulation without the

need for any loop compensation. PWM dimming response is

limited only by the rate of rise and fall of the inductor current,

enabling very fast rise and fall times. The HV9910B requires

only three external components (apart from the power stage) to

produce a controlled LED current making it an ideal solution for

low cost LED drivers.

Typical Application Circuit

CIN

CDD

VIN

VDD

HV9910B

LD

GATE

PWMD

CS

RT GND

RT

D1

CO

L1

Q1

RCS

Share Link: