Datasheet > RT8479C

RT8479C

更新时间： 2024-09-25 01:19:07

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
15页	148K
描述
Two-Stage Hysteretic LED Driver

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RT8479C 数据手册

RT8479C

Two-Stage Hysteretic LED Driver with Internal MOSFETs

General Description

Features

^Two-Stage Topology (Boost + Buck)

The RT8479C is a two-stage controller with dual

MOSFETs and consists of a Boost converter (first stage)

and a Buck converter (second stage). The advantage of

two-stage topology is highly compatible with ET (Electronic

Transformer) and extremely high Power Factor

performance in MR16 / AR111 lighting market fields

applications.

^Dual MOSFETs Inside

^Wide Input Voltage Range : 4.5V to 36V

^Excellent Power Factor

^Programmable Boost Output Voltage

^Independent Dual Stage Function

^Programmable LED Current with 5% LED Current

Accuracy

The first stage is a Boost converter for constant voltage

output with inductor peak current over-current protection.

The second stage is a Buck converter for constant output

current by typical constant peak current regulation.

^Input Under-Voltage Lockout Detection

^Thermal Shutdown Protection

Ordering Information

RT8479C

The RT8479C is equipped with dual output gate drivers

for internal power MOSFETs.

Package Type

SP : SOP-8 (Exposed Pad-Option 2)

The RT8479C is available in the SOP-8 (Exposed Pad)

package.

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Applications

Richtek products are :

 MR16 Lighting

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

 Suitable for use in SnPb or Pb-free soldering processes.

 Signage andDecorative LEDLighting

 Architectural Lighting

 High Power LED Lighting

 Low Voltage Industrial Lighting

 Indicator and Emergency Lighting

 Automotive LED Lighting

Simplified Application Circuit

VCC

OUT

RT8479C

SENSE

OVP

VCC

LED+

LED-

AC 12V

ISN

CREG

LX1

VCOMP

ACTL

Dimming

LX2

GND

is a registered trademark of Richtek Technology Corporation.

DS8479C-04 August 2014

www.richtek.com

12 3 4 5 6 7...15

中文翻译

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