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SD4851 - PRIMARY SIDE POWER CONTROLLER

General Description

SD4851 is primary side power controller with built-in high voltage MOSFET.

It senses the output voltage indirectly by using the auxiliary wind of the power transformer.

It adopts Pulse Frequency Modulation (PFM) technology for flyback power supply controller.

Key Features

  • Lower start-up current.
  • Primary side control for Constant Voltage (CV) and Constant Current (CC).
  • Leading edge blanking.
  • Pulse-Frequency Modulation.
  • Overvoltage protection.
  • Undervoltage lockout.
  • Over temperature protection.
  • Built-in high voltage MOSFET.
  • Cycle by.

📥 Download Datasheet

Datasheet Details

Part number SD4851
Manufacturer Silan Microelectronics
File Size 655.48 KB
Description PRIMARY SIDE POWER CONTROLLER
Datasheet download datasheet SD4851 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SD4851 PRIMARY SIDE POWER CONTROLLER WITH BUILT-IN HIGH VOLTAGE MOSFET DESCRIPTION SD4851 is primary side power controller with built-in high voltage MOSFET. It senses the output voltage indirectly by using the auxiliary wind of the power transformer. It adopts Pulse Frequency Modulation (PFM) technology for flyback power supply controller. SD4851 provides accurate constant voltage, constant current (CV/CC) regulation for higher efficiency and higher reliability. By using SD4851 for flyback power controller, Few peripheral components are needed, the Opto-coupler and secondary control circuitry is not needed and the loop compensation circuitry for maintaining stability is also unnecessary. DIP-8A-300-2.