Transition-Mode PFC and Quasi-Resonant Current Mode PWM Controller
The LD7792N ist enhancement version of LD7792, the audible noise produced during start-up & light load is greatly reduced and the THDi is also further improved.
LD7792N features transition mode Power Factor correction (PFC) controller and Quasi-Resonant (QR) current mode controller for cost effective and fewer external component 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 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 IC is available in SMD. LD7792N GS in SOP-16 package.
FEATURES
▲ Integrated PFC and QR or PWM flyback controller
▲ Transition mode PFC controller
▲ Quasi-Resonant operation for flyback
▲ AC/DC input acceptable
▲ Brown in/out protection
▲ Internal soft-start function
▲ Adjustment OLP debounce time
▲ PFC light load turn-off control
▲ OVP (Over Voltage Protection)
▲ OCP (Cycle by Cycle Current Limit)
▲ Internal OTP (Over Temperature Protection)
▲ External OTP (Over Temperature Protection)
▲ 500/-1000mA, typ. driving capability for PFC and flyback
APPLICATIONS
▲ LED lighting
Datasheet 
