Datasheet > HV9982

HV9982

更新时间： 2024-11-22 14:51:43

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
22页	689K
描述
The HV9982 is a three-channel, closed loop, peak current mode PWM controller for driving a constan

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HV9982 数据手册

HV9982

Three-Channel, Closed-Loop, Switch Mode

LED Drive IC

Features

Description

HV9982 is a three-channel, closed loop, peak-current

mode PWM controller designed to drive a constant out-

put current. It can be used for driving either RGB LEDs

or multiple channels of white LEDs.

• Switch mode controller for single-switch convert-

ers

• Closed loop control of output current

- Buck

HV9982 includes a 40V linear regulator which provides

an 8.0V supply to power the IC. The switching frequen-

cies of the three converters are controlled by an exter-

nal clock signal. The channels operate at a switching

frequency of 1/12th of the external clock frequency and

are positioned 120° out-of-phase to reduce the input

current ripple. Each converter is driven by a peak cur-

rent mode controller with output current feedback.

- Boost

- SEPIC

• High PWM dimming ratio

• Internal 40V linear regulator

• Constant frequency operation

• Programmable slope compensation

• Linear and PWM dimming

• +0.2A/-0.4A gate drives for the switching FETs

• Output short circuit protection

• Output over voltage protection

• Hiccup-mode protection

• Analog control of PWM dimming

The three output currents can be individually dimmed

using either linear or PWM dimming. The IC also

includes three disconnect FET drivers, which enable

high PWM-dimming ratios and also help to disconnect

the input in case of an output short-circuit condition.

HV9982 includes a Hiccup-mode protection for both

open LED and short-circuit condition with automatic

recovery when the fault clears.

Applications

• RGB backlight applications

• Multiple string, white-LED driver applications

 2014 Microchip Technology Inc.

DS20005295B-page 1

12 3 4 5 6 7...22

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