RT8402 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Phase-Cut Dimmable High Side Buck LED Driver

RT8402
Phase-Cut Dimmable High Side Buck LED Driver with High
Power Factor
General Description
The RT8402 is a boundary mode controller that can
provide good PFC and be suitable for wall dimmer. The
RT8402 supports phase-cut dimmers, including
leading-edge (TRIAC) and trailing-edge dimmers. It is
used for buck converter and can be compatible with
TRIAC dimmer. The external MOSFET is switched by
internal gate driver and the feedback circuit regulates
output current precisely.
The RT8402 features a ZCS detector which keeps
system operating in BCM and obtaining excellent
power efficiency, better EMI performance.
The robust dimming control method can adjust the
output current following the TRIAC turn on angle and
avoid abnormal flicker.
This driver can use a cheap simple drum core inductor
in the system instead of an EE core to obtain high
efficiency.
The RT8402 is housed in a TSOT-23-6 package. Thus,
the components in the whole LED driver system can be
made very compact.
Ordering Information
RT8402
Package Type
J6 : TSOT-23-6
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
 RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
 Suitable for use in SnPb or Pb-free soldering processes
Features
 Built-In Power MOSFET
 Active Power Factor Correlation
 Programmable Constant LED Current with
High-Precision Current Regulation
 Excellent Line And Load Regulation
 Suit For High Side Buck Low BOM Cost
Requirement
 Unique Dimming Control Method to be
compatible with TRIAC Dimmer
 Used in Low Input Voltage Range
 Support Low Percentage Dimming Angle
 Built-in Over Thermal Protection
 Output LED String Open Protection
 Output LED String Short Protection
 Over Current Protection
Applications
 E27, PAR, Light Bar, Offline LED Lights
Pin Configuration
(TOP VIEW)
DIM VC SENSE
6
5
4
2
3
VCC SGND GATE
TSOT-23-6
Marking Information
2Q=DNN
2Q= : Product Code
DNN : Date Code
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
DS8402-00 January 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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