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RT8498

Richtek
Part Number RT8498
Manufacturer Richtek
Description 18V Multi-Topology LED Driver
Published Oct 20, 2021
Detailed Description ® RT8498 18V Multi-Topology LED Driver with Dimming Control General Description The RT8498 is a current-mode LED drive...
Datasheet PDF File RT8498 PDF File

RT8498
RT8498

Overview
® 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 ©2018 Richtek Technology Corporation.
All rights reserved.
DS8498-02 December 2018 is a registered trademark of Richtek Technology Corporation.
www.
richtek.
com 1 RT8498 Functional Pin Description Pin No.
Pin Name Pin Function 1 SW Switch node of the PWM converter.
2 GND Ground.
3 DCTL Digital dimming control input.
4 ACTL Analog dimming control input.
Effective programming range is 0.
6...


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