Diodes ZXGD3102 - Manual (Page 10)

Issue 4, May 2009 10 www.diodes.com
©Diodes Incorporated 2008
ZXGD3102T8
Active OR’ing or N+1 redundancy
• In normal operation, power supply A and B share the load for maximum reliability.
• Power supply A supports the load if power supply B fails and vice versa.
• Blocking diodes protect the load from a faulty power supply affecting the load voltage.
• The load can be tens of amps.
• Dissipation in the diodes can be high!
• The ZXGD3102 is designed to switch the low on-resistance MOSFETs used to replace the
blocking diodes.
Figure 1: OR’ING with Schottky Diodes