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NTE7172 Overvoltage Crowbar Sensing Circuit

Model:

NTE7172

 | Catalog #: 55053119
Price:
$4.39
$4.39
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  • VCC = 14.4V
  • ICC = 5mA
  • (TA = +75°C), PD = 100mW
  • Topr = --20° to +75°C
  • Tstg = --55° to +150°C

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  • DC supply voltage (between V+ and V-- terminals) = 36V
  • Operating voltage range = to 36V or &plusnm;2 to &plusnm;18V
  • Differential--mode input voltage = &plusnm;8V
  • Common--mode DC input voltage = (V+ +8V) to (V-- --0.5V)
  • Input--terminal current = 1mA
  • PD = 630mW
    Derate linearly above +55°C = 6.67mW/°C
  • Topr = --40° to +85°C
  • Tstg = --65° to +150°C
  • TL = +265°C
  • Output short--circuit duration is indefinite
  • Above ratings are maximum values which if exceeded may damage or destroy the device

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  • VINmax = 35V
  • Vreset = 35V
  • Pdmax
    No fin = 1.75V
    TC = +25°C = 20W
  • Topr = --30° to +80°C
  • Tstg = --55° to +150°C
  • Above ratings are maximum values - to exceed risks damaging the device

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Product Summary

The NTE7172 is an overvoltage protection circuit that protects sensitive electronic circuitry from overvoltage transients or regulator failures when used in conjunction with an external "crowbar" SCR. The NTE7172 senses the overvoltage condition and quickly "crowbars" or short-circuits the supply, forcing the supply into current limiting or opening the fuse or circuit breaker. The protection voltage threshold is adjustable and can be programmed for minimum duration of overvoltage condition before tripping, thus supplying noise immunity. The NTE7172 can be used with either positive or negative supplies.

  • VCC = 40VDC
  • VSense1 = 6.5VDC
  • VSense2 = 6.5VDC
  • Vact - 7.0VDC
  • IO = 300mA
  • TA = 0° to +70°C
  • TJ = +125°C
  • Tstg = −65°C to +150°C
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.

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By phone: 1-800-843-7422

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