Datasheet > HV9931

HV9931

更新时间： 2024-10-01 14:55:43

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美国微芯 - MICROCHIP		/
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描述
The HV9931 is a fixed frequency PWM controller IC designed to control an LED lamp driver using a s

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HV9931 数据手册

HV9931

Unity Power Factor LED Lamp Driver

Features

General Description

• Constant Output Current LED Driver

• Large Step-Down Ratio

The HV9931 is a fixed-frequency PWM controller IC

designed to control an LED lamp driver using a

single-stage PFC buck-boost-buck topology. It can

achieve a unity power factor and a very high step-down

ratio that enables driving a single high-brightness LED

from 85 VAC to 264 VAC input without a power

transformer. This topology allows reducing the filter

capacitors and using non-electrolytic capacitors to

improve reliability. The HV9931 uses open-loop peak

current control to regulate both input and output

currents. This control technique eliminates the need for

loop compensation, limits the input inrush current, and

is inherently protected from Input Undervoltage

condition.

• Unity Power Factor

• Low-Input Current Harmonic Distortion

• Fixed-Frequency or Fixed Off-Time Operation

• Internal 450V Linear Regulator

• Input and Output Current Sensing

• Input Current Limit

• Enable Pulse-Width Modulation (PWM) Dimming

and Phase Dimming

Applications

• Offline LED Lamps and Fixtures

• Street Lamps

Capacitive isolation protects the LED Lamp from failure

of the switching MOSFET. The HV9931 provides a

low-frequency PWM dimming input that accepts an

external control signal with a duty ratio of 0% to 100%

and a frequency of up to a few kilohertz. The PWM

dimming capability enables HV9931 phase control

solutions that can work with standard wall dimmers.

• Traffic Signals

• Decorative Lighting

Package Type

8-lead SOIC

(Top view)

VIN

CS2

VDD

PWMD

CS1

GND

GATE

See Table 2-1 for pin information.

 2020 Microchip Technology Inc.

DS20005733A-page 1

12 3 4 5 6 7...14

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