Datasheet > RT8420

RT8420

更新时间： 2024-11-12 15:50:03

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
13页	166K
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技术参数
数据手册

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RT8420 技术参数

Status：	Active	Vin (min) (V)：	7
Vin (max) (V)：	50	Vout (max) (V)：
LED Channels：		Topology：	Buck
SW Freq (typ) (kHz)：		Vcs (typ) (mV)：	100
Dimming Control：	Analog;PWM	Features：	OCP;SCP;UVP
Package Type：	MSOP-8(PP);PSOP-8

RT8420 数据手册

RT8420

1.2A, Hysteretic, High Brightness LED Driver with Internal

Switch

General Description

Features

^7V to 50V Input Voltage Range

The RT8420 is a high-efficiency, continuous mode,

inductive step-down converter, designed for driving single

or multiple series-connected LED strings from a voltage

source higher than the LEDstring voltage. It operates from

an input voltage range from 7V to 50V and employs a

hysteretic control loop with a high side current sense

resistor to set the constant LED output current.

^Hysteretic Control with High Side Current Sensing

^Internal N-MOSFET with 350mΩ Low R_DS(ON)

^1.2A Output Current

^Up to 97% Efficiency

^Typical 5% LED Current Accuracy

^ADJ Pin for Analog Dimming and PWM Dimming

^Limited Max Switching Frequency at Low

Percentage Dimming

The RT8420 includes a low side power switch and a high

side output current sensing circuit, which uses an external

resistor to set the nominal average output current. The

LED brightness control is achieved by analog dimming

method and the maximum switching frequency is clamped

when the dimming percentage is low.

^Input Under Voltage Lockout

^Thermal Shutdown Protection

 RoHS Compliant and Halogen Free

Applications

 Automotive LED Lighting

The RT8420 is available in MSOP-8 (Exposed Pad) and

SOP-8 (Exposed Pad) package that makes the chip more

thermal efficient.

 High Power LED Lighting

 Indicator and Emergency Lighting

 Architectural Lighting

 Low Voltage Industrial Lighting

 Signage andDecorative LEDLighting

Ordering Information

RT8420

Package Type

FP : MSOP-8 (Exposed Pad)

SP : SOP-8 (Exposed Pad-Option 1)

Marking Information

RT8420GFP

11= : Product Code

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

YMDNN : Date Code

11=YM

DNN

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

RT8420GSP

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

RT8420GSP : Product Number

RT8420

GSPYMDNN

YMDNN : Date Code

is a registered trademark of Richtek Technology Corporation.

DS8420-03 October 2018

www.richtek.com

12 3 4 5 6 7...13

中文翻译

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与RT8420相关器件

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RT8457A	RICHTEK	获取价格	暂无描述
RT8458A	RICHTEK	获取价格	暂无描述
RT8458AGJ6	RICHTEK	获取价格	IC LED DRIVER OFFL DIM TSOT23-6
RT8462	RICHTEK	获取价格	暂无描述
RT8463	RICHTEK	获取价格	High Voltage Multi-Topology LED Driver
RT8471	RICHTEK	获取价格	Hysteretic, High Brightness LED Driver
RT8471GFP	RICHTEK	获取价格	Hysteretic, High Brightness LED Driver
RT8471GJ5	RICHTEK	获取价格	Hysteretic, High Brightness LED Driver
RT8471GSP	RICHTEK	获取价格	Hysteretic, High Brightness LED Driver

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