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HF500-30 - Flyback Regulator

General Description

The HF500-30 is a fixed-frequency, currentmode regulator with built-in slope compensation.

The HF500-30 combines a 700V MOSFET and a full-featured controller into one chip for a lowpower, offline, flyback, switch-mode power supply.

Key Features

  • include brown-in and brown-out, VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), input over-voltage protection (OVP), VCC over-voltage protection (OVP), and over-temperature protection (OTP). The HF500-30 features over-power line compensation to ensure that the overload protection point is independent of the input voltage. The HF500-30 is available in a PDIP8-7B package. Maximum Output Power (1) 230VAC ± 15% 85VAC ~ 265VAC Adapter (2) Open Fram.

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Full PDF Text Transcription for HF500-30 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for HF500-30. For precise diagrams, and layout, please refer to the original PDF.

The Future of Analog IC Technology HF500-30 Fixed-Frequency, Flyback Regulator with Multi-Mode Control and Over-Power Line Compensation DESCRIPTION The HF500-30 is a fixe...

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ol and Over-Power Line Compensation DESCRIPTION The HF500-30 is a fixed-frequency, currentmode regulator with built-in slope compensation. The HF500-30 combines a 700V MOSFET and a full-featured controller into one chip for a lowpower, offline, flyback, switch-mode power supply. At medium and heavy loads, the regulator works in a fixed frequency with frequency jittering. Jitterring helps reduce EMI energy on the switching frequency and its harmonics. During a light-load condition, the regulator freezes the peak current and reduces its switching frequency to 25kHz to offer excellent efficiency. At very light loads, the regu