Voltage Supervisors | NCP345

Overvoltage Protection Circuit (6.85 V Threshold)

Obsolete

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Overview

The NCP345 over-voltage protection circuit (OVP) protects sensitive electronic circuitry from over-voltage transients and power supply faults when used in conjunction with an external P-channel FET. The device is designed to sense an over-voltage condition and quickly disconnect the input voltage supply from the load before any damage can occur. The OVP consists of a precise voltage reference, a comparator with hysteresis, control logic, and a MOSFET gate driver. The OVP is designed on a robust BiCMOS process and is intended to withstand voltage transients up to 30 V.

The device is optimized for applications that have an external AC/DC adapter or car accessory charger to power the product and/or recharge the internal batteries. The nominal over-voltage threshold is 6.85 V so it is suitable for single cell Li-Ion applications as well as 3/4 cell NiCD/NiMH applications.

  • Cellular Phones
  • Digital Cameras
  • Portable Computers and PDAs
  • Portable CD and other Consumer Electronics

  • Over-Voltage Turn-Off Time of less than 1 msec
  • Accurate Voltage Threshold of 6.85 V (nominal)
  • Under-Voltage Lockout Protection
  • CNTRL Input Compatible with 1.8 V Logic Levels
  • Pb-Free Package is Available

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Reference Price

NCP345SNT1

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Obsolete

CAD Model

Pb

A

H

P

TSOP-5 / SOT-23-5

483

1

235

REEL

3000

N

-

30

6.85

750

-

-

-

-

Price N/A

More Details

NCP345SNT1G

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Obsolete

CAD Model

Pb

A

H

P

TSOP-5 / SOT-23-5

483

1

260

REEL

3000

N

-

30

6.85

750

-

-

-

-

Price N/A

More Details

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