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SD4871 - CURRENT MODE PWM CONTROLLER

Description

application.

Mode to reduce switching loss and improve efficiency.

Features

  • Battery Chargers.
  • Frequency shuffling to improve EMI performance.
  • Adapters.
  • Light Load Mode for minimum standby power.
  • Set-Top Box Power Supplies.
  • External programmable switching frequency.
  • 3μA 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 package.

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Datasheet preview – SD4871

Datasheet Details

Part number SD4871
Manufacturer Silan Microelectronics
File Size 264.63 KB
Description CURRENT MODE PWM CONTROLLER
Datasheet download datasheet SD4871 Datasheet
Additional preview pages of the SD4871 datasheet.

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Full PDF Text Transcription

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SD4871_Datasheet CURRENT MODE PWM CONTROLLER DESCRIPTION SD4871 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 startup resistor could be used in the startup circuit to minimize the standby current because of low startup current. SD4871 offers complete protection functions including cycle-bycycle over current protection, over load protection, over voltage SOT-23-6L and under voltage protections for VDD voltage, etc. Excellent EMI performance is achieved with frequency shuffling technique and soft switching control at the totem pole gate driver output.
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