LD7792ETransition-Mode PFC and Quasi-Resonant Current Mode PWM Controller
The LD7792E is the enhancement version of LD7790, the audible noise produced during start-up & light load is greatly reduced and the THDi is also further improved. LD7792E 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 LD7792E 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
- LED Lighting
