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JW7221 - Positive High-Voltage Hot Swap and Inrush Current Controller

General Description

The JW®7221 and JW®7221L are positive hot swap controllers that allows a board to be safely inserted and removed from a live backplane or other hot power sources.

JW7221/W7221L offers inrush current control to protect MOSFET against system voltage droop and transients.

Key Features

  • Wide operating range: 9 V to 80 V.
  • Inrush current limit protection.
  • Programmable power limit.
  • Adjustable current limit: 55mV±11%.
  • Circuit breaker function for severe overcurrent events.
  • Internal high side charge pump and gate driver for external N-channel MOSFET.
  • Adjustable under-voltage lockout (UVLO) and hysteresis.
  • Adjustable over-voltage lockout (OVLO) and hysteresis.
  • Initial insertion timer allows ringing and transients to subside after system c.

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Datasheet Details

Part number JW7221
Manufacturer JoulWatt
File Size 1.16 MB
Description Positive High-Voltage Hot Swap and Inrush Current Controller
Datasheet download datasheet JW7221 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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JW7221/JW7221L Positive High-Voltage Hot Swap and Inrush Current Controller With Power Limiting DESCRIPTION The JW®7221 and JW®7221L are positive hot swap controllers that allows a board to be safely inserted and removed from a live backplane or other hot power sources. JW7221/W7221L offers inrush current control to protect MOSFET against system voltage droop and transients. The function of power limit protection allows better utilization of the external MOSFET’s SOA. An external capacitor connected from TMR to GND establishes the timeout period to declare a fault condition and Gate is turned off when timeout condition occurs. The POWER GOOD keeping high declares MOSFET is turned on. The under voltage and over voltage protection threshold can be programmed via external resistor dividers.