Datasheet > HV9803B

HV9803B

更新时间： 2023-12-06 20:09:24

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
14页	661K
描述
The HV9803B is an open loop average-mode current control LED driver IC operating in a constant off

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HV9803B 数据手册

HV9803B

LED Driver IC with Average-Mode Constant Current Control

Features

General Description

• 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 HV9803B is an open-loop, Average-mode current

control LED driver IC operating in a constant Off-time

mode. The IC features ±2% current accuracy and 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.

• Input Undervoltage Shutdown

The HV9803B can be powered from a 7V to 16V

supply. The IC features fast PWM dimming response.

The linear dimming input LD can accept a reference

voltage from 0V to 3V.

Applications

• Backlighting of LCD Panels

• General Lighting

The IC is equipped with a current limit comparator for

Hiccup-mode output short-circuit protection. It also

features

programmable input undervoltage

shutdown.

Package Type

8-lead SOIC

(Top view)

VDD

UVLO

PWMD

GND

GATE

See Table 2-1 for pin information.

 2017 Microchip Technology Inc.

DS20005642A-page 1

12 3 4 5 6 7...14

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