Datasheet > RT8498

RT8498

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
12页	235K
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中文翻译

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技术参数
数据手册

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RT8498 技术参数

Status：	Active	Vin (min) (V)：	3
Vin (max) (V)：	18	Vout (max) (V)：	18
LED Channels：	1	Topology：	Boost;Buck;Buck-boost
SW Freq (typ) (kHz)：	350	Vcs (typ) (mV)：	100
Dimming Control：	Analog;PWM;PWM-to-Analog	Features：	Current Mode Control;Cycle-by-Cycle Current Limit;OVP;UVP
Package Type：	SOT-26

RT8498 数据手册

RT8498

18V Multi-Topology LED Driver with Dimming Control

General Description

Features

^High Voltage : VIN Up to 18V, VOUT Up to 18V

The RT8498 is a current-mode LED driver supporting wide

input voltage range from 3V to 18V and output voltage up

to 18V. With internal 350kHz operating frequency, the size

of the external PWM inductor and input/output capacitors

can be minimized. High efficiency is achieved by a 100mV

current sensing control. LEDdimming control can be done

from either analog or PWM signal. The RT8498 provides

an internal soft-start function to avoid inrush current and

thermal shutdown to prevent the device from overheat.

^Built-In 2A Power Switch

^Current-Mode PWM Control

^350kHz Fixed Switching Frequency

^Analog, PWM Digital or PWM Converting to Analog

with One External Capacitor

^Internal Soft-Start to Avoid Inrush Current

^Under-Voltage Lockout

^Internal Over Voltage Protection to Limit Output

Voltage

The RT8498 is available in the SOT-23-6 package.

^Cycle-by Cycle Current Limit

^Thermal Shutdown

Ordering Information

RT8498

Applications

Package Type

E : SOT-23-6

 GPS, Portable DVD Backlight

 Display Cabinet Lamp and Room Lighting

 IP Camera

Lead Plating System

G : Green (Halogen Free and Pb Free)

Note :

Richtek products are :

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

Pin Configuration

(TOP VIEW)

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

ISN VCC ACTL

Marking Information

47= : Product Code

SW GND DCTL

SOT-23-6

47=DNN

DNN : Date Code

is a registered trademark of Richtek Technology Corporation.

DS8498-02 December 2018

www.richtek.com

12 3 4 5 6 7...12

中文翻译

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