RT8487GJ6 Richtek

RT8487 High Efficiency BCM LED Driver Controller for High Power Factor Offline Applications General Description Features The RT8487 is a Boundary mode high PF floating buck Support High Power Factor and THDi constant LED current output controller with an internal Consideration Applications gate driver. Programmable Constant LED Current with Highly The RT8487 features a ZCS detector which keeps Precision Current Regulation system operating in BCM and obtaining excellent Extremely Low Quiescent Current Consumption power efficiency, better EMI performance. and 1A Shutdown Current The RT8487 achieves high power factor correction True Low System BOM Cost and Economical (PFC) and low total harmonic distortion of current Floating Buck Converter Solution (THDi) by a smart internal line voltage compensation Unique Programmable AND Pin for ZVS Setting circuit which has minimized system component counts to Achieve Best Power Efficiency saved both PCB size and total system cost. Universal Input Voltage Range with Off-Line Especially, the RT8487 can use a cheap simple drum Topology core inductor in the system instead of an EE core to Built-in Over Thermal Protection obtain high efficiency. Built-in Over Voltage Protection The RT8487 is housed in a TSOT-23-6 package. Thus, Output LED String Open Protection the components in the whole LED driver system can be Output LED String Short Protection made very compact. Output LED String Over Current Protection Ordering Information Applications E27, PAR, Light Bar, Offline LED Lights RT8487 Package Type Pin Configurations J6 : TSOT-23-6 (TOP VIEW) Lead Plating System SENSE VC AND G : Green (Halogen Free and Pb Free) 6 5 4 Note : 2 3 Richtek products are : RoHS compliant and compatible with the current VCC GND GATE requirements of IPC/JEDEC J-STD-020. TSOT-23-6 Suitable for use in SnPb or Pb-free soldering processes. Marking Information 00= : Product Code DNN : Date Code 00=DNN Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS8487-00 March 2015 www.richtek.com 1 RT8487 Simplified Application Circuit Buck type: Bridge Rectifier + - R1 R2 C IN AND VCC RT8487 Q1 VC GATE R3B SENSE GND C1 D2 C2 Bootstrap Diode R L1 S D1 C OUT Copyright 2015 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS8487-00 March 2015 2