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SD4870 - CURRENT MODE PWM CONTROLLER

Description

SD4870 is a current mode PWM controller IC for high performance, low standby power offline flyback converter application.

In no load or light load condition, the IC operates in Light Load Mode to reduce switching loss and improve efficiency.

Features

  • Frequency shuffling to improve EMI performance.
  • Light Load Mode for minimum standby power.
  • External programmable switching frequency.
  • 3uA low startup current.
  • Internal LEB circuit.
  • VDD over voltage and under voltage protection.
  • Gate output maximum voltage clamp.
  • Current limiting.
  • Over load protection.
  • SOT-23-6L/SOP8/DIP8 package.

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Datasheet preview – SD4870

Datasheet Details

Part number SD4870
Manufacturer Silan Microelectronics
File Size 492.45 KB
Description CURRENT MODE PWM CONTROLLER
Datasheet download datasheet SD4870 Datasheet
Additional preview pages of the SD4870 datasheet.

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Full PDF Text Transcription

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SD4870_Datasheet CURRENT MODE PWM CONTROLLER DESCRIPTION SD4870 is a current mode PWM controller IC for high performance, low standby power offline flyback converter application. In no load or light load condition, the IC operates in Light Load Mode to reduce switching loss and improve efficiency. Large value startup resistor could be used in the startup circuit to minimize the standby current because of low startup current. SD4870 offers complete protection functions including cycle-bycycle over current protection, over load protection, VDD voltage over voltage and under voltage protection, etc. Excellent EMI performance is achieved with frequency shuffling technique and soft switching control at the totem pole gate driver output. SOT-23-6L DIP-8-300-2.54 SOP-8-225-1.
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