SiFirst SF1530
SF1530 is a high performance, low cost, highly integrated current mode PWM controller for offline flyback converter applications. When the output power demands decrease, the IC automatically decreases switching frequency for high power conversion efficiency. When the current set-point falls below a given value, e.g.| Part No. | SF1530 |
|---|---|
| Datasheet | SF1530 Download |
| Manufacturer | SiFirst |
| Description | High Performance Current Mode PWM Controller |
| Buy | Stock & Price |
FEATURES
● Proprietary “Zero OCP/OPP Recovery Gap” Control● Built-in Soft Start Function
● All Pins Floating Protection
● Very Low Startup Current
● High Voltage CMOS Process with Excellent ESD Protection
● Frequency Reduction and Burst Mode Control for Energy Saving
● Current Mode Control
● Built-in Frequency Shuffling
● Programmable Switching Frequency
● Built-in Synchronous Slope Compensation
● Cycle-by-Cycle Current Limiting
● Built-in Leading Edge Blanking (LEB)
● Constant Power Limiting
● 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
PWM switching frequency with shuffling is externally programmable, which can reduce conduction EMI emission of a power supply. the output power demand diminishes, the IC enters into burst mode and provides excellent efficiency without audio noise. The IC can achieve “Zero OCP/OPP Recovery Gap” using SiFirst’s proprietary control algorithm.
