先頭に戻る

Reference Design for a High-Current Power Supply with Lossless Current Sensing Using the MAX5060

リファレンスデザインの免責事項 参照:  重要なお知らせと免責事項  (リファレンスデザインおよびその他マキシムのリソース)

説明

Introduction

Today's data processing elements demand higher currents from power supplies to achieve higher speed. Lossless current sensing and ground bouncing are key challenges for accurate control of output voltage and current in these applications.

The MAX5060 PWM buck power-supply controller uses an average-current-mode control technique to track the load current, and it employs differential sensing to accurately control the output voltage. In this reference design, the series resistance (DCR) of the inductor is used for current sensing to avoid power loss in the current-sense resistor.

This design shows a solution for implementing a high-current (30A) power supply with high system efficiency and good load regulation. The complete schematic, bill of materials (BOM), efficiency measurements, and test results are included below.

Specifications and Design Setup

This reference design achieves the following specifications.

  • Input voltage: 12V ±10%
  • Output voltage: 1.5V
  • Output current: 30A
  • Output ripple: ±15mV
  • Input ripple: ±250mV
  • Efficiency: > 88% with half of full load (15A)
  • Switching frequency: 275kHz
  • Footprint size: 5cm × 3.3cm

The schematic for this reference design is shown in Figure 1, and the BOM is given in Table 1. In this design, the MAX5060 is used in a buck configuration.

Icon

設計、作成、試験済み

このボードは完全実装および試験済みです。販売はしておりません。

 

マキシムデバイス (1)

型番 名称 製品ファミリ 注文 設計キットおよび評価モジュール
MAX5060 0.6V~5.5V出力、並列接続可能、平均電流モードDC-DCコントローラ スイッチングレギュレータ 今すぐ購入 Design Kits

マキシムデバイス (1)

型番 製品ファミリ
スイッチングレギュレータ
0.6V~5.5V出力、並列接続可能、平均電流モードDC-DCコントローラ

関連ビデオ

全ビデオを見る