设计、搭建、测试
图示的电路板已装配完成且经过测试。

概览

设计资源

设计与集成文件

  • Schematic
  • PCB Layout
  • BOM
下载设计文件 1.66 M

描述

The MAXREFDES1258 is a 1200W, 12V, 4-phase DC-DC buck converter that delivers up to 100A load current. The design is optimized for data-center applications with an input voltage range of 35V to 60V. It is also suitable for industrial, automotive and communication applications. The MAXREFDES1258 employs a MAX15157B fixed-frequency, current-mode PWM controller that drives power MOSFETs in the buck configuration, allowing the device to operate as a step-down regulator. The control loop uses a valley current-mode architecture to optimize performance with low-duty cycles and provides the shortest on-time possible. The output voltage is set externally through a resistor divider network using the 2V default internal reference. The load current is balanced equally between the two interleaved phases using a state-of-the-art differential current-sense and balancing network.

优势和特点

  • Wide 35V to 60V input voltage range
  • Highly regulated output voltage with ±1% ripple
  • State-of-the-art current balancing for dual-phase operation
  • Interleaved 180° out-of-phase operation
  • Current monitor outputs of individual phases
  • Robust fault protection
  • Cycle-by-cycle and average overcurrent protection
  • Multiple levels of overvoltage protection

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