LD7790

LD7790 9/11/2013 Transition-Mode PFC and Quasi-Resonant Current Mode PWM Controller REV: 00 General Description The LD7790 features transition mode Power Factor correction (PFC) controller and Quasi-Resonant (QR) current mode controller for cost effective and fewer external components design of high power application. The intelligent PFC switching ON/OFF, zero current detection (ZCD) and frequency limitation mechanism enable a better efficiency under any load conditions. The device is also integrated several functions of protection, such as X-CAP discharge, Brown-in/out protection, Over Load protection (OLP), Over Temperature Protection (OTP), Over Voltage Protection (OVP) and Over Current Protection (OCP) with High / Low Line Compensation. Therefore it can protect the system from damage due to occasional failure. The LD7790 is available in a SOP-16 package. Features  Integrated PFC and QR Flyback Controller  Transition Mode PFC Controller  Quasi-Resonant Operation for Flyback  Built-in X-CAP Discharging  Brown IN/OUT Protection  Internal Soft-Start Function  Adjustment OLP Debounce time  External Latch Protection  PFC Light Load Turn-off Control  OVP (Over Voltage Protection)  OCP (Cycle by cycle current limiting)  500/-1200mA Driving Capability  Internal OTP function Applications  AC-DC High Power Adapter  Open Frame SMP 1 Leadtrend Technology Corporation LD7790-DS-00 September. 2013 www.leadtrend.com.tw Free Datasheet http://www.datasheet4u.com/ LD77...