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ISL644 - High Voltage ORing MOSFET Controller

Description

TSSOP PIN # 1 2 3 8 9 14 15 16 4, 5, 6, 7, 10, 11, 12, 13 QFN PIN # 19 1 2 7 9 SYMBOL FUNCTION GATE External FET Gate Drive VIN Power Supply Connection HVREF Chip High Voltage Reference GND Chip Ground Reference FAULT Fault Output 13 14 15 3, 4, 5, 6, 8, 10, 11, 12, 16, 17, 18, 20 VSET C

Features

  • Wide Supply Voltage Range +9V to +75V.
  • Transient Rating to +100V.
  • Reverse Current Fault Isolation.
  • Internal Charge Pump Allows the use of N-Channel MOSFET.
  • HS Comparator Provides Very Fast.

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Full PDF Text Transcription

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Data Sheet October 6, 2011 ISL6144 FN9131.7 High Voltage ORing MOSFET Controller The ISL6144 ORing MOSFET Controller and a suitably sized N-Channel power MOSFET(s) increases power distribution efficiency and availability when replacing a power ORing diode in high current applications. In a multiple supply, fault tolerant, redundant power distribution system, paralleled similar power supplies contribute equally to the load current through various power sharing schemes. Regardless of the scheme, a common design practice is to include discrete ORing power diodes to protect against reverse current flow should one of the power supplies develop a catastrophic output short to ground.
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