Datasheet > HV9803

HV9803

更新时间： 2024-11-11 12:00:39

品牌	Logo	应用领域
超科 - SUPERTEX		驱动
页数	文件大小	规格书
7页	828K
描述
LED Driver IC with Average-Mode Constant Current Control

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HV9803 数据手册

Supertex inc.

HV9803

LED Driver IC

with Average-Mode Constant Current Control

Features

General Description

The HV9803 is an open loop average-mode current control

LED driver IC operating in a constant off-time mode. The IC

features ±2% current accuracy, tight line and load regulation

of the LED current without any need for loop compensation

or high-side current sensing. Its auto-zero circuit cancels the

effect of both the input offset voltage and the propagation

delay in the current sense comparator.

► Fast average current control

► Correction for propagation delay and offset voltage

► Fixed off-time switching mode

► Linear dimming input

► PWM dimming input

► Output short circuit protection with programmable

skip mode

The HV9803 can be powered from a 7.0~13.2V supply. The

IC features fast PWM dimming response. The linear dimming

input LD can accept a reference voltage up to 2.5V.

► Input under-voltage shutdown

Applications

► Backlighting of LCD Panels

The IC is equipped with a current limit comparator for

hiccup-mode output short circuit protection. It also features a

programmable input under-voltage shutdown.

Typical Application Circuit

+V_IN

7.0~13.2V

C_IN

C_DD

D₁

L₁

R₁

VDD

DIM

REF

Q₁

PWMD

GATE

HV9803

R_CS

UVLO

C_SKIP

R_T

GND

R₂

Doc.# DSFP-HV9803

NR012313

Supertex inc.

www.supertex.com

12 3 4 5 6 7

中文翻译

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