SF1549
SF1549 is PWM Power Switch manufactured by SiFirst.
FEATURES
- Built-in 4A 600V Power MOSFET
- Proprietary η-Balance TM Control to Boost
Light Load Efficiency
- Proprietary “Zero OCP/OPP Recovery Gap”
Control
- Fixed 65KHz 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
SF1549 is a high performance, high efficiency, highly integrated current mode PWM power switch for offline flyback converter...
