Datasheet > HV9985

HV9985

更新时间： 2024-10-01 14:53:07

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
20页	1900K
描述
The HV9985 is a three-channel peak current mode PWM controller for driving single switch converter

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HV9985 数据手册

HV9985

3-Channel Closed-Loop Switch-Mode LED Driver IC

Features

General Description

• Switch Mode Controller for Single-Switch

Converters

The HV9985 is a 3-channel Peak Current mode PWM

controller for driving single-switch converters in a

constant output Current mode. It can be used for

driving either RGB LEDs or multiple channels of white

LEDs.

• Gate Drivers Optimized for Driving Logic Level

FETs

- 0.25A Sourcing

- 0.5A Sinking

The HV9985 features a 40V linear regulator, which

provides a 5V supply to power the IC. The switching

frequencies of the three converters in the IC are

controlled either with an external clock signal (the

channels operate at a switching frequency of 1/12th of

the external clock frequency) or using the internal

oscillator. The three channels are positioned 120°

out-of-phase to reduce the input current ripple. Each

converter is driven by a Peak Current mode controller

with output current feedback.

• Typical ±2% Absolute and String-to-String Current

Accuracy (with ±1% Sense Resistors)

• High Pulse-Width Modulation (PWM) Dimming

Ratio up to 5000:1

• 10V to 40V Input Range

• Constant Frequency Operation up to 1 MHz

• On-Chip Clock or External Clock Option

• Programmable Slope Compensation

• Linear and 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 disconnect the LED load

in case of an output LED Short-circuit condition. The

HV9985 includes Hiccup mode protection for both open

LED and Short-circuit condition to prevent the IC from

shutting down in cases of intermittent Fault conditions.

• Output LED Short-Circuit Protection

• Output Overvoltage Protection

• Hiccup Mode Protection

Applications

• RGB Backlight Applications

• Boost, Buck, and SEPIC Topologies

• Multiple String White LED Driver Applications

Package Type

40-lead QFN

(Top view)

VDD1

FLT1

CS1

VDD3

FLT3

CS3

COMP1

FDBK1

REF1

OVP1

VIN

COMP3

FDBK3

REF3

OVP3

CLK

GND

VDD

Refer to Table 2-1 for pin information.

 2019 Microchip Technology Inc.

DS20005558B-page 1

12 3 4 5 6 7...20

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