GP8510

Optimal Power Design GP8510 Single Stage Buck PFC Controller for LED Lighting Description Features The GP8510 is a single stage Buck PFC controller targeting at LED lighting applications. It drives the Buck converter in the quasiresonant mode to achieve higher efficiency. It keeps the Buck converter in constant on time operation to achieve high power factor. GP8510 is offered in SOT23-6 package. Valley turn-on of the MOSFET to achieve low switching losses. 0.3V current sense reference voltage leads to a lower sense resistance thus a lower conduction loss. Internal high current MOSFET driver: 0.25A sourcing and 0.5A sinking Low start up current: 12μA typical Reliable short LED and Open LED protection Power factor >0.9 with single-stage conversion. Application LED lighting Down light Tube lamp PAR lamp Bulb lamp Ordering Information Device GP8510 Marking 8510 Package SOT23-6 Rev.2 - 1 - Mar. 2015 Optimal Power Design Pin Assignment GP8510 CS 1 GND 2 COMP 3 8510 6 DRV 5 VCC 4 ZCS (PKG: SOT23-6) Pin Description No. Pin Name Pin Function Description 1 CS Current Sense Input 2 GND Ground 3 COMP Feedback Compensation Output 4 ZCS Zero Current Sense Input 5 VCC Power Supply Input 6 DRV Gate Driver Output Rev.2 - 2 - Mar. 2015 Optimal Power Design Block Diagram GP8510 COMP CS ZCS gm Vref Vref UVLO & BIAS 0.75V Valley Detector PWM Logic & Driver OVP VCC OVP VCC DRV GND Absolute Maximum Ratings Symbol Vcc Vdrv Vz...