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SF1533 Datasheet Pwm Power Switch

Manufacturer: SiFirst Technology

Overview: SF1533 η-BalanceTM PWM Power Switch Fixed 50KHz Fsw.

Datasheet Details

Part number SF1533
Manufacturer SiFirst Technology
File Size 542.78 KB
Description PWM Power Switch
Datasheet SF1533-SiFirstTechnology.pdf

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 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.

Key Features

  • Built-in 600V Power MOSFET.
  • Proprietary η-BalanceTM 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 Compensation.
  • Cycle-by-Cycle Current Limiting.
  • Built-in Leading Edge.

More Datasheets from SiFirst Technology

Part Number Description

SF1533 Distributor