Datasheet > RT7304AGE

RT7304AGE

更新时间： 2024-01-05 16:08:32

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	711K
描述
Primary-Side Regulation LED Driver Controller

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RT7304AGE 数据手册

RT7304A

Primary-Side Regulation LED Driver Controller with Active-PFC

General Description

Features

The RT7304A is a constant current LED driver with

active power factor correction. It supports high power

factor across a wide range of line voltages, and it drives

the converter in the Quasi-Resonant (QR) mode to

achieve higher efficiency. By using Primary Side

Regulation (PSR), the RT7304A controls the output

current accurately without a shunt regulator and an

opto-coupler at the secondary side, reducing the

external component count, the cost, and the volume of

the driver board.

 Tight LED Current Regulation

 No Opto-Coupler and TL431 Required

 Power Factor Correction (PFC)

 Quasi-Resonant

 Maximum/Minimum Switching Frequency

Clamping

 Maximum/Minimum on-Time Limitation

 Wide VDD Range (up to 34V)

 THD Optimization

 Input-Voltage Feed-Forward Compensation

 Multiple Protection Features

 LED Open-Circuit Protection

 LED Short-Circuit Protection

 Output Diode Short-Circuit Protection

 VDD Under-Voltage Lockout

 VDD Over-Voltage Protection

 Over-Temperature Protection

 Cycle-by-Cycle Current Limitation

The RT7304A embeds comprehensive protection

functions for robust designs, including LED open-circuit

protection, LED short-circuit protection, output diode

short-circuit protection, VDD Under-Voltage Lockout

(UVLO), VDD Over-Voltage Protection (VDD OVP),

Over-Temperature Protection (OTP), and cycle-by-cycle

current limitation.

Applications

 AC/DC LED Lighting Driver

Simplified Application Circuit

Buck-Boost Converter

TX1

OUT-

Line

OUT

Neutral

VDD

RT7304A

OUT+

VDD

COMP

ZCD

GND

AUX

ZCD1

ZCD2

is a registered trademark of Richtek Technology Corporation.

DS7304A-01 May 2016

www.richtek.com

12 3 4 5 6 7...16

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