LD7820

LD7820 04/08/2012 Primary-Side PWM Controller with CV/CC Operation for LED REV:00 General Description The LD7820 is a primary-side feedback controller in CV/CC operation for LED lighting applications. It minimizes the components counts and is available in tiny packages. Those make it an ideal design for low cost applications. The LD7820 provides constant voltage, constant current (CV/CC) operation requiring neither photo-coupler nor secondary control circuit. Also, the LD7820 features OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent the circuit from being damaged under abnormal conditions. Features  Primary-side Feedback Control  Constant Current Control  Built-in Load Regulation Compensation  Built-in Primary Winding Inductance Compensation  Low Startup Current (<16A)  Current Mode Control with Cycle-by-Cycle Current Limit  Green Mode Control  UVLO (Under Voltage Lockout)  LEB (Leading-Edge Blanking) on CS Pin  OVP (Over Voltage Protection) on Vcc  OTP (Over Temperature Protection)  300mA Driving Capability Applications  AC-DC LED Driver Typical Application Leadtrend Technology Corporation LD7820-DS-00 April 2012 1 www.leadtrend.com.tw Pin Configuration DIP-8 (TOP VIEW) 8765 TOP MARK YYWW## 1 23 4 GN D COM P NC FB LD7820 SOT-26 (TOP VIEW) OUT VCC CS 65 4 YWS 20 123 COMP GND FB OUT VCC NC CS YY, Y : Year code (D: 2004, E: 2005…..) WW, W: Week code ## : Production family code S20 : LD7820 Ordering Information Part number ...