LD7922

LD7922 08/02/2012 Primary-Side PWM Power Switch with CV/CC Operation VER. 00 General Description The LD7922 integrates a 700V power MOSFET and a primary-side feedback PWM controller with CV/CC operation in a DIP-7 package. The LD7922 is designed for low power adapter/charger and 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 LD7922 provides constant voltage, constant current (CV/CC) operation requiring neither photo-coupler nor secondary control circuit. Also, the LD7922 features OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent the circuit from being damaged under abnormal conditions. Features  Built-in 700V Power MOSFET  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) Applications  AC-DC Adapter and Charger  AC-DC LED Lighting Typical Application AC Input AC Input EMI Filter FB COMP VCC LD7922 Drain GND S Leadtrend Technology Corporation LD7922-DS-00 Aug. 2012 1 www.leadtrend.com.tw Pin Configuration DIP-7 (TOP VIEW) VCC DRAIN DRAIN 8 65 TOP MARK YYWWPP 1 YY2WW3 PP4 YY...