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Ultra-low standby power less than 90mW auxiliary AC/DC power supply reference design

PMP21251

Overview

The PMP21251 reference design uses the UCC28056 CRM/DCM PFC controller, UCC256304 enhanced LLC controller and integrated driver to provide a 12V/10.8A output (continuous current, 14.4A peak current) from a universal AC input. This design achieves peak efficiency of 92.4% at 115VAC input and 94.0% at 230VAC input. Efficiency and power factor also meet 115V and 230V internal 80 PLUS Gold specifications and DoE Level VI requirements. Additionally, without turning off the PFC, the design can achieve power consumption as low as 89mW at an input supply voltage of 230VAC.

characteristic

● When powered by a 230VAC power supply, no-load power consumption as low as 89mW can be achieved without turning off the PFC.
● 54mm x 141mm x 30mm compact circuit board size
● THD is less than 20% at load exceeding 20%
● Performance meets 80 PLUS Gold standard
● Four-point efficiency at 115V is 91.6% and at 230V is 93.0%

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Design Files

Documentation

PMP21251 Test Results

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Update:2025-06-18 23:41:52

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