User's Guide

SNVA285A – October 2007 – Revised April 2013

AN-1713 LM5116-12 Evaluation Board

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Introduction

The LM5116-12 evaluation board is designed to provide the design engineer with a fully functional power

converter based on Emulated Current Mode Control to evaluate the LM5116 controller IC. The evaluation

board provides a 12V output with a 5A current capability. The operating input voltage ranges from 15V to

80V. The design operates at 250kHz, a good compromise between conversion efficiency and solution

size. The printed circuit board consists of 4 layers, 2 ounce copper top and bottom, 1 ounce copper

internal layers on FR4 material with a thickness of 0.06 inches. This user's guide contains the evaluation

board schematic, Bill-of-Materials (BOM), and a quick setup procedure. For complete circuit design

information, see LM5116 Wide Range Synchronous Buck Controller (SNVS499).

The performance of the evaluation board is:

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Input Range: 15V to 80V

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Output Voltage: 12V

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Output Current: 0 to 5A

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Frequency of Operation: 250 kHz

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Board Size: 2.55 × 2.65 × 0.7 inches

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Load Regulation: 1%

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Line Regulation: 0.1%

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Hiccup Mode Current Limit Protection

Figure 1. Efficiency with 10 µH Gowanda Inductor

Figure 2. Efficiency with 10 µH Pulse Inductor

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SNVA285A – October 2007 – Revised April 2013

AN-1713 LM5116-12 Evaluation Board

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