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SEMICONDUCTOR DEVICE AND BATTERY VOLTAGE MONITORING DEVICE

  • US 20140055896A1
  • Filed: 08/16/2013
  • Published: 02/27/2014
  • Est. Priority Date: 08/24/2012
  • Status: Active Grant
First Claim
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1. A semiconductor device for measuring voltage of each of a plurality of unit cells series-coupled in multi-stage and configuring an assembled battery, the semiconductor device comprising:

  • a first terminal to be coupled to a first node which is one electrode of a unit cell and is coupled to another unit cell in the unit cells;

    a second terminal to be coupled to a second node which is the other electrode of the unit cell and is coupled to another unit cell;

    a voltage measurement circuit operable to measure an inter-terminal voltage between the first terminal and the second terminal;

    a first level shifter circuit operable to convert the inter-terminal voltage into a low-potential-side inter-terminal voltage;

    a comparator circuit operable to compare the low-potential-side inter-terminal voltage with a predetermined reference voltage;

    a second level shifter circuit operable to convert a low-potential-side shunt control signal into a high-potential-side shunt control signal; and

    a first switch operable to short-circuit the first terminal and the second terminal via a first resistor, on the basis of the high-potential-side shunt control signal.

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