RT7321BFGSP Richtek

RT7321 Linear LED Driver for High-Voltage LED Lamps General Description Features AC Input Voltage Range : 200 to 240V RMS The RT7321 is a simple and robust constant-current No Electrolytic Capacitor and Transformer regulator designed to provide a cost-effective solution for Required driving high-voltage LEDs in LED lamp applications. The Improved LED Utilization RT7321 is equipped with a proprietary control mechanism Programmable LED Current to improve the utilization of high-voltage LEDs. The RT7321 Thermal Regulation Protection allows users to set the regulated current levels (WQFN- High Power Efficiency 20L 5x5 Package) for various LED lamps. It also provides High Power Factor low pin-count SOP-8 (Exposed Pad) package with Easy EMI Solution customized current setting to meet various application Minimized BOM Cost and Space Required requirements. In addition, the RT7321 also provides a RoHS Compliant and Halogen Free thermal regulation protection, instead of traditional thermal shutdown, to suppress the rise of the temperatures in LED lamps and prevent the LED lamps from flicker. Applications High-Voltage LED Lamps Simplified Application Circuit For SOP-8 (Exposed Pad) Package For WQFN-20L 5x5 Package RT7321 HV1 HV AC S3 S1 RT7321 S4 S2 HV1 HV GND I11 AC S3 S1 I32 I12 S4 S2 I31 I13 GND I33 I23 I21 I22 Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS7321-01 January 2014 www.richtek.com 1RT7321 Ordering Information Marking Information RT7321 RT7321GSP Package Type RT7321GSP : Product Number SP : SOP-8 (Exposed Pad-Option 2) RT7321 YMDNN : Date Code QW : WQFN-20L 5x5 (W-Type) GSPYMDNN Lead Plating System G : Green (Halogen Free and Pb Free) RT7321AEGSP RT7321 Version Table RT7321AEGSP : Product Number (Only for SOP-8 (Exposed Pad)) RT7321AE YMDNN : Date Code Note : GSPYMDNN Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. RT7321BFGSP RT7321BFGSP : Product Number Suitable for use in SnPb or Pb-free soldering processes. RT7321BF YMDNN : Date Code GSPYMDNN RT7321 Version Table RT7321XYGSP Parallel Current Code Series Current Code RT7321CGGSP (I and I ) (X) (I ) (Y) P S1/2 P S3/4 S S3/4 RT7321CGGSP : Product Number RT7321CG 10mA A 10mA A YMDNN : Date Code GSPYMDNN 15mA B 15mA B 20mA C 20mA C 25mA D 25mA D RT7321CHGSP RT7321CHGSP : Product Number 30mA E 30mA E RT7321CH YMDNN : Date Code 35mA F GSPYMDNN 40mA G 45mA H RT7321GQW 50mA I RT7321GQW : Product Number RT7321 YMDNN : Date Code GQW YMDNN Copyright 2014 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS7321-01 January 2014 2