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HFC0511 - Fixed-Frequency Flyback Controller

General Description

The HFC0511 is a fixed-frequency, currentmode controller with internal slope compensation specifically designed for medium-power, offline, flyback, switch-mode power supplies.

The HFC0511 is a highly efficient green-mode controller.

Key Features

  • include thermal shutdown, VCC under-voltage lockout (UVLO), overload protection (OLP), over-voltage protection (OVP), and brown-out protection. The HFC0511 is available in a SOIC8-7A package.

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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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HFC0511 Fixed-Frequency Flyback Controller with Ultra-Low, No-Load Power Consumption DESCRIPTION The HFC0511 is a fixed-frequency, currentmode controller with internal slope compensation specifically designed for medium-power, offline, flyback, switch-mode power supplies. The HFC0511 is a highly efficient green-mode controller. At light loads, the controller freezes the peak current and reduces its switching frequency down to 27kHz to achieve excellent light-load efficiency. At very light loads, the controller enters burst mode to achieve very low standby power consumption. The HFC0511 offers frequency jittering to help dissipate energy generated by the conducted noise.