Power delivery system with mitigation for radiation induced single event latch-up in microelectronic devices

Patent metadata

Field	Value
Publication number	US-9823679-B2
Application number	US-201514744759-A
Country	US
Kind code	B2
Filing date	Jun 19, 2015
Priority date	Jun 20, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A power delivery system includes a programmable current limit switch circuit connected between a power supply and electronic control circuits that are susceptible to single event latch-up. The programmable current limit switch is connected in a power bus between the power supply and the electronic control circuits. The programmable current limit switch circuit removes power from the electronic control circuits when an over-current condition persists for a blank time period, and restores power to the electronic control circuits after a retry time period.

First claim

The invention claimed is:

1. A power delivery system comprising:
a power supply;
a power bus for supplying power from the power supply to electronic control circuits susceptible to SEL; and
a programmable current limit switch circuit connected in the power bus between the power supply and the electronic control circuits to remove power from the electronic control circuits in response to an over-current condition and then restore power to the electronic control circuits the programmable current limit switch circuit comprising:
an auto-retry programmable current limit switch integrated circuit having an input terminal, an output terminal, an on command terminal, and a current threshold setting terminal;
a current threshold setting resistor connected to the current threshold setting terminal such that only the current threshold setting resistor is connected to the current threshold setting terminal external to the auto-retry programmable current limit switch integrated circuit.

2. The power delivery system of claim 1 , wherein the programmable current limit switch circuit removes power from the electronic control circuits when the over-current condition persists for a blank time period.

3. The power delivery system of claim 2 , wherein the programmable current limit switch circuit automatically restores power to the electronic control circuits after a retry time period.

4. The power delivery system of claim 1 , wherein the power bus includes a first section connected between the power supply and the input terminal and a second section connected between the output terminal and the electronic control circuits.

5. The power delivery system of claim 1 , wherein the programmable current limit switch circuit further includes:
a pull-up resistor connected between the first section of the power bus and the on command terminal.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Wilberg David R
• Manojlovic Milorad

Classifications

• H02H3/06

  with automatic reconnection · CPC title

• H02J4/00

  Circuit arrangements for mains or distribution networks not specified as AC or DC; Circuit arrangements for mains or distribution networks combining AC and DC sections or sub-networks (arrangements using intermediate DC-AC-DC conversion H02J1/002; arrangements using high-voltage DC [HVDC] links H02J3/36) · CPC title

• H02H5/005

  responsive to ionising radiation; Nuclear-radiation circumvention circuits (radiation detectors G01T; nuclear-explosion detection G21J5/00) · CPC title

• G05F1/625 Primary

  wherein it is irrelevant whether the variable actually regulated is AC or DC · CPC title

• H02H3/006

  Calibration or setting of parameters · CPC title