RT8498

®

DS8498-01 April 2017

www.richtek.com

1

©

Copyright 2017 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

18V Multi-Topology LED Driver with Dimming Control

General Description

The RT8498 is a current-mode LED driver supporting wide

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. LED dimming 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.

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

Features

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

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Built-In 2A Power Switch

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Current-Mode PWM Control

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350kHz Fixed Switching Frequency

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Analog, PWM Digital or PWM Converting to Analog

with One External Capacitor

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Internal Soft-Start to Avoid Inrush Current

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Under-Voltage Lockout

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Internal Over Voltage Protection to Limit Output

Voltage

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Cycle-by Cycle Current Limit

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Thermal Shutdown

Applications

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GPS, Portable DVD Backlight

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Display Cabinet Lamp and Room Lighting

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IP Camera

Ordering Information

Note :

Richtek products are :

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RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

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

RT8498

Package Type

E : SOT-23-6

Lead Plating System

G : Green (Halogen Free and Pb Free)

Pin Configuration

(TOP VIEW)

SOT-23-6

SW GND DCTL

ISN VCC ACTL

4

23

5

6

Marking Information

47=DNN

47= : Product Code

DNN : Date Code