RT8498 Datasheet, PDF (1/12 Pages) Richtek Technology Corporation – 8V Multi-Topology LED Driver with Dimming Control

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RT8498
18V Multi-Topology LED Driver with Dimming Control
General Description
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. 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.
Ordering Information
RT8498
Package Type
E : SOT-23-6
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
 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.
Marking Information
47=DNN
47= : Product Code
DNN : Date Code
Features
 High Voltage : VIN Up to 18V, VOUT Up to 18V
 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
 Cycle-by Cycle Current Limit
 Thermal Shutdown
Applications
 GPS, Portable DVD Backlight
 Display Cabinet Lamp and Room Lighting
 IP Camera
Pin Configuration
(TOP VIEW)
ISN VCC ACTL
6
5
4
2
3
SW GND DCTL
SOT-23-6
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS8498-01 April 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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