LD7792OTransition-Mode PFC and Quasi-Resonant Current Mode PWM Controller
The LD7792N/O is the enhancement version of the LD7792, the audible noise produced during start-up & light load is greatly reduced and the THDi is also further improved. LD7792N/O 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 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 LD7792N/O is available in a SOP-16 package.
Features
- Integrated PFC and QR or PWM Flyback Controller
- Transition mode operation for PFC
- 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 limiting)
- Internal OTP function
- External OTP protection
- 500/-1000mA, typ. driving capability for PFC and flyback
Applications
- LED lighting
