Dual-Output Isolated Fly-Buck Reference Design With an Ultra-Small Coupled Inductor
Description
PMP15005 uses the LM5160 in a Fly-Buck™ topology with the primary and secondary output both set to 5V nominal. The circuit accommodates a voltage input range from 14V to 36V: ideal for the 24-V nominal input rail. While the primary side is set at 5.4V nominally using the feedback resistors: the secondary isolated side sees 5V: which 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 225mA each. The switching frequency is set at 300 kHz nominal.
Features
- 14V to 36Vin: +5V @225mA (dual) output: 2.25W (one non-isolated primary and one isolated secondary~85% peak efficiencyCompact and cost effective isolated solution with an off-the-shelf coupled inductor instead of custom transformerSolution size: 32 x 22 mm (1.25 x 0.9 inch); max component height: 3.5mm3.5mm max height of coupled inductor helps in height-constraint applications
Applications
Product Categories
- Power management
| Download the bill of materials for PMP15005 | Download |
Test Data
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Download the test file for PMP15005| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| PMP15005 Gerber LM5160 Fly Buck | 25 Jul 2016 | ZIP | 302 | |
| PMP15005 PCB Layer Plots LM5160 Fly Buck | 25 Jul 2016 | 343 | ||
| PMP15005 CAD Files LM5160 Fly Buck | 25 Jul 2016 | ZIP | 337 | |
| PMP15005 Assembly Drawing LM5160 Fly Buck | 25 Jul 2016 | 65 | ||
| PMP15005 BOM LM5160 Fly Buck | 25 Jul 2016 | 59 | ||
| PMP15005 Schematic LM5160 Fly Buck | 25 Jul 2016 | 92 |