SF1533 Description
SF1533 is a high performance, high efficiency, highly integrated current mode PWM power switch for offline flyback converter applications. In SF1533, PWM switching frequency with shuffling is fixed to 50KHz and is trimmed to tight range. When the output power demands decrease, the IC decreases switching frequency based on the proprietary η -BalanceTM control to boost power conversion efficiency at the light load.
SF1533 Key Features
- Built-in 600V Power MOSFET
- Proprietary η-BalanceTM Control to Boost
- Proprietary “Zero OCP/OPP Recovery Gap”
- Fixed 50KHz Switching Frequency
- Built-in Soft Start Function
- Very Low Startup Current
- Frequency Reduction and Burst Mode Control
- Current Mode Control
- Built-in Frequency Shuffling
- Built-in Synchronous Slope pensation