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Home » NEWEST Products » New by Manufacturer » ON Semiconductor » ON Semi NCP4354 Secondary Side SMPS OFF Mode Controller
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ON Semiconductor NCP4354 Secondary Side SMPS OFF Mode Controller

ON Semiconductor NCP4354 Secondary
Side SMPS OFF Mode Controller

ON Semiconductor's NCP4354 Secondary Side SMPS OFF Mode Controller is a secondary side SMPS controller designed for use in applications which require extremely low no load power consumption. The device is capable of detecting 'no load' conditions and entering the power supply into a low consumption OFF mode. During OFF mode, the primary side controller is turned off and energy is provided by the output capacitors thus eliminating the power consumption required to maintain regulation. During OFF mode, the output voltage relaxes and is allowed to decrease to an adjustable level. Once more energy is required, it automatically restarts the primary side controller. During normal power supply operation, the devices provide integrated voltage feedback regulation, replacing the need for a shunt regulator. This device includes an LED driver pin implemented with an open drain MOSFET driven by a 1kHz square wave with a 12.5% duty cycle for indication purpose.

Features
  • Supply Current <100 uA
  • Constant current and constant voltage regulation
  • +-1% reference voltage accuracy over temperature
  • Low power consumption in all operating modes
  • Optional current regulation
  • Accurate regulation
Applications
  • Offline Adapters for Notebooks, Game Stations and Printers
  • High Power AC−DC Converters for TVs, Set−Top Boxes, Monitors
Block Diagram
Block Diagram
  • ON Semiconductor
  • Power Management
  • Semiconductors|Integrated Circuits|IC-Power Management