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RM3253 - Off Line AC/DC Switcher

General Description

unregulated isolated linear transformer (50/60HZ).

Unlike conventional PWM (pulse width modulation) controllers, they regulate the output voltage in a new method of off-time modulation control.

Key Features

  • Built-in 800V high voltage BJT and minimal external componets.
  • Low start-up current: Typ.15 μA Max.25 μA.
  • UVLO(under voltage lockout):Typ.12V start-up Typ.6V shut-down.
  • Low operating current:Typ.2 mA Max.5 mA.
  • LEB(leading edge blanking): Typ.300ns.
  • OVP(over voltage protection).

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Datasheet Details

Part number RM3253
Manufacturer REACTOR
File Size 223.43 KB
Description Off Line AC/DC Switcher
Datasheet download datasheet RM3253 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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RM3253 RM3253 Off Line AC/DC Switcher IC Description The RM3253 series switcher ICs cost effectively replace all power supplies up to 5W output power based on unregulated isolated linear transformer (50/60HZ). Unlike conventional PWM (pulse width modulation) controllers, they regulate the output voltage in a new method of off-time modulation control. The controller consists of a VCO (voltage control oscillator), Sense and logic circuit, VDD pin, under-voltage lockout circuit, protection for over-voltage, current limited circuit, leading edge blanking, over load protection and fault condition auto-restart. They are ideal low power AC/DC adapter/charger solution for portable devices, Features • Built-in 800V high voltage BJT and minimal external componets • Low start-up current: Typ.