RT8487 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – High Efficiency BCM LED Driver Controller for High Power

RT8487
High Efficiency BCM LED Driver Controller for High Power
Factor Offline Applications
General Description
The RT8487 is a Boundary mode high PF floating buck
constant LED current output controller with an internal
gate driver.
The RT8487 features a ZCS detector which keeps
system operating in BCM and obtaining excellent
power efficiency, better EMI performance.
The RT8487 achieves high power factor correction
(PFC) and low total harmonic distortion of current
(THDi) by a smart internal line voltage compensation
circuit which has minimized system component counts;
saved both PCB size and total system cost.
Especially, the RT8487 can use a cheap simple drum
core inductor in the system instead of an EE core to
obtain high efficiency.
The RT8487 is housed in a TSOT-23-6 package. Thus,
the components in the whole LED driver system can be
made very compact.
Features
 Support High Power Factor and THDi
Consideration Applications
 Programmable Constant LED Current with Highly
Precision Current Regulation
 Extremely Low Quiescent Current Consumption
and 1µA Shutdown Current
 True Low System BOM Cost and Economical
Floating Buck Converter Solution
 Unique Programmable AND Pin for ZVS Setting
to Achieve Best Power Efficiency
 Universal Input Voltage Range with Off-Line
Topology
 Built-in Over Thermal Protection
 Built-in Over Voltage Protection
 Output LED String Open Protection
 Output LED String Short Protection
 Output LED String Over Current Protection
Ordering Information
RT8487
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.
Marking Information
Applications
 E27, PAR, Light Bar, Offline LED Lights
Pin Configurations
(TOP VIEW)
SENSE VC AND
6
5
4
2
3
VCC GND GATE
TSOT-23-6
00=DNN
00= : Product Code
DNN : Date Code
Copyright © 2015 Richtek Technology Corporation. All rights reserved.
DS8487-00 March 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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