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AN4129 - Green Current Mode PWM Controller FAN7601

General Description

1.

The FAN7601 contains a start-up switch to reduce power loss in the external start-up circuit of conventional PWM converters.

Key Features

  • of the FAN7601. This device is a BCDMOS programmable frequency current mode PWM controller which is designed for off-line adapter.

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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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www.DataSheet4U.com www.fairchildsemi.com Application Note AN4129 Green Current Mode PWM Controller FAN7601 1. Introduction This application note describes the operation and features of the FAN7601. This device is a BCDMOS programmable frequency current mode PWM controller which is designed for off-line adapter applications and auxiliary power supplies. To reduce power loss at light and no load, the FAN7601 operates in burst mode and it includes a start-up switch to reduce the losses in the start-up circuit. Because of the internal start-up switch and burst mode operation, it is possible to supply an output power of 0.5W with under 1W input power when the input line voltage is 265V. On no load condition, input power is under 0.3W.