Dual output non-isolated Flybuck reference design

PMP10733

Overview

The PMP10733 uses the LM5160 in a Fly-Buck-Boost topology with the primary side set to a negative voltage. Setting the primary side to a negative voltage reduces the turns ratio of the transformer and therefore allows for better line and load regulation. The primary and secondary voltages are set to negative 15V and positive 15V respectively. The maximum operating current on the primary and secondary voltage rails is set to 150mA. The switching frequency is set to 200kHz.

characteristic

●Input voltage is 5V to 20V, output voltage is +/-15V (150mA), total output power is 4.5W, IC supports input voltage from 6V to 60V
● Peak efficiency is 81%
● Compact solution with coupled coil
● Solution size: 20x20 mm (0.8x0.8 inches); Maximum component height: 4.5mm
● Board size: 38 x 38 mm (1.5 x 1.5 inches), 2-layer board, 1 oz copper

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Blockdiagram

Design Files

Documentation

PMP10733 Test Results (LM5160 Fly Buck Boost)

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Update:2024-11-15 02:42:12

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