Dual-Output LM5161-Q1 Fly-Buck™ Reference Design With an Ultra-Small Coupled Inductor
Description
PMP15007 uses the LM5161-Q1 in a Fly-Buck topology with the primary and secondary output both set to 5V nominal. The circuit accommodates a voltage input range from 36V to 72V: ideal for the 48V nominal input rail. While the primary side is set at 5.32V nominally: the secondary isolated side sees 5V when using feedback resistors and is based on Coilcraft’s LPD8035V series coupled inductor set at a turns-ratio of 1:1. The maximum operating current on both the primary and secondary rails are set at 225 mA each. The switching frequency is set at 315 kHz nominal.
Features
- 36V to 72Vin: 5V @225mA (dual) output: 2.25W (one non-isolated primary and one isolated secondary)~75% peak efficiencyCompact and cost effective isolated solution with an off-the-shelf coupled inductor instead of custom transformerSolution size: 32 mm x 22 mm (1.25 in. x 0.9 in.); max component height: 3.5 mm3.5 mm max height of coupled inductor helps in height-constraint applications
Applications
Product Categories
- Power management