Datasheet > RT7302

RT7302

更新时间： 2024-11-08 01:19:07

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
15页	275K
描述
Primary-Side-Regulation Dimmable LED Driver Controller

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中文翻译

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RT7302 数据手册

RT7302

Primary-Side-Regulation Dimmable LED Driver Controller

with Active PFC

General Description

Features

^Tight LED Current Regulation

^No Opto-Coupler and TL431 Required

^Power Factor Correction (PFC)

^Compatible with PWM Dimming

^Built-in HV Start-up Device

The RT7302 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 RT7302 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.

^Quasi-Resonant

^Maximum/Minimum Switching Frequency

Clamping

^Input Voltage Feed-Forward Compensation

^Maximum/Minimum On-Time Limitation

^Wide VDD Voltage Range (up to 25V)

 Multiple Protection Features

^LED Open-Circuit Protection

The RT7302 is designed to be compatible with PWM

Dimming. The output current can be modulated by the

duty ratio of the external PWM dimming signal.

An in-house design High Voltage (HV) start-up device is

integrated in the RT7302 to minimize the power loss and

shorten the start-up time.

^LED Short-Circuit Protection

^Output Diode Short-Circuit Protection

^VDD Under-Voltage Lockout

^VDD Over-Voltage Protection

^Over-Temperature Protection

^Cycle-by-Cycle Current Limit

 RoHS Compliant and Halogen Free

The RT7302 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

Flyback Converter

Buck-Boost Converter

TX1

OUT

Line

OUT-

OUT+

TX1

OUT

SIN

RT7302

OUT+

OUT-

Neutral

MULT

COMP

GND

COMP

GND

AUX

COMP

AUX

COMP

VDD

ZCD

VDD

ZCD

ZCD1

ZCD2

VDD

ZCD1

ZCD2

is a registered trademark of Richtek Technology Corporation.

DS7302-03 May 2015

www.richtek.com

12 3 4 5 6 7...15

中文翻译

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与RT7302相关器件

型号	品牌	获取价格	描述	数据表
RT7302GS	RICHTEK	获取价格	Primary-Side-Regulation Dimmable LED Driver Controller
RT7304	RICHTEK	获取价格	Primary-Side-Regulation LED Driver Controller with Active PFC
RT7304A	RICHTEK	获取价格	Primary-Side Regulation LED Driver Controller
RT7304AGE	RICHTEK	获取价格	Primary-Side Regulation LED Driver Controller
RT7304GE	RICHTEK	获取价格	Primary-Side-Regulation LED Driver Controller with Active PFC
RT7315A	RICHTEK	获取价格	暂无描述
RT7324	ETC	获取价格	可驅動128 Pattern(32x4)的液晶驅動IC，可廣泛的使用於各種液晶顯示系統(L
RT7339P	RICHTEK	获取价格	暂无描述
RT7730	ETC	获取价格	Burst Triple-mode PWM Flyback Controller
RT7736B	RICHTEK	获取价格	SmartJitterTM PWM Flyback Controller

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