Data Sheet Rev. 0
CN 1 View All

Overview

Features and Benefits

  • 1+1 Redundant System for a 1.5V Bus (0.5V to 3.3V with Modifications)
  • Eliminates ORing Diode Power Dissipation
  • Reverse-Current Detection
  • Adjustable Undervoltage Threshold (Configured to 0.75V)
  • Adjustable Overvoltage Threshold (Configured to 2V)
  • FAULT-bar Output Status Indicator
  • Adjustable Soft-Start
  • Supports Up to 20A of Load Current
  • Surface-Mount Construction
  • Fully Assembled and Tested

Product Details

The MAX8555A evaluation kit (EV kit) demonstrates the functionality of the MAX8555A ORing MOSFET controller, which provides redundancy and fault isolation to highly reliable power systems. The EV kit is configured for 1.5V operation, but can also be modified to operate in 0.5V to 3.3V power systems.

During startup, the EV kit monitors the voltage difference between the power supplies VIN1 or VIN2 and a system power bus VOUT. Once the voltage difference is less than 50mV (typ), the MAX8555A turns on the two associated ORing MOSFETs, connecting the power supply to the system power bus. Once the MOSFETs are fully on, the EV kit circuit monitors the supply current and voltages to protect against undervoltage (UVP), overvoltage (OVP), and reverse-current fault conditions. PC board pads for fault output signals are provided for circuit monitoring.

Applications

  • Point-of-Load Supplies
  • Power-Supply Modules
  • Rectifiers
  • Redundant Power Supplies in High-Availability Systems
  • Servers
  • Telecom Power Supplies

Documentation & Resources

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