Datasheet > HV9910B_08

HV9910B_08

更新时间： 2024-02-09 21:20:46

品牌	Logo	应用领域
超科 - SUPERTEX		驱动器
页数	文件大小	规格书
8页	737K
描述
Universal High Brightness LED Driver

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中文翻译

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HV9910B_08 数据手册

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 8.0 to 450V linear regulator

► Constant frequency or constant off-time operation

► Linear and PWM dimming capability

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 8.0 - 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.

► Requires few external components for operation

Applications

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.

► 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

Typical Application Circuit

C_IN

C_O

C_DD

VIN

VDD

HV9910B

GATE

PWMD

GND

R_CS

R_T

12 3 4 5 6 7 8

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