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Three-Phase AC and DC Input to 24V at 125mA Quick-Startup Isolated Flyback Reference Design (PMP10195)

This design supplies an isolated24V at 125mAfrom three-phase AC mains and DC input voltage. Since a maximum 70-ms startup time is necessary and the maximum input voltage is 1260 Vdc, a low-loss startup network has been developed. In order to reduce the stress on the FET, a cascode configuration has been selected. The controller features constant switching frequency and low quiescent current. A small form factor makes it suitable for electronic breaker supply.

Возможности

LM5020-based isolated flyback in constant switching frequency delivering 24V at 125mA 80% peak efficiency at full load and 325Vdc input voltage Extremely wide input voltage range: 56Vac to 891Vac Less than 70-ms startup time Magnetic feedback: no optocoupler is needed

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Three-Phase AC and DC Input to 24V at 125mA Quick-Startup Isolated Flyback Reference Design PMP10195

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