SF1533
FEATURES
- Built-in 600V Power MOSFET
- Proprietary η-Balance TM Control to Boost
Light Load Efficiency
- Proprietary “Zero OCP/OPP Recovery Gap”
Control
- Fixed 50KHz Switching Frequency
- Built-in Soft Start Function
- Very Low Startup Current
- Frequency Reduction and Burst Mode Control for Energy Saving
- Current Mode Control
- Built-in Frequency Shuffling
- Built-in Synchronous Slope pensation
- Cycle-by-Cycle Current Limiting
- Built-in Leading Edge Blanking (LEB)
- Constant Power Limiting
- Pins Floating Protection
- Audio Noise Free Operation
- VDD OVP & Clamp
- VDD Under Voltage Lockout (UVLO)
APPLICATIONS
Offline AC/DC Flyback Converter for
- AC/DC Adaptors
- Open-frame SMPS
- Set-Top Box Power Supplies
- ATX Standby Power
GENERAL 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...
