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Battery protection integrated circuit and circuit characteristic setting method

  • US 9,755,442 B2
  • Filed: 11/30/2015
  • Issued: 09/05/2017
  • Est. Priority Date: 06/17/2015
  • Status: Active Grant
First Claim
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1. A battery protection IC, includingan overcharge detection circuit configured to detect an overcharge of a secondary battery,an over-discharge detection circuit configured to detect an over-discharge of the secondary battery,an overcurrent detection circuit configured to detect an overcurrent of the secondary battery,a control circuit configured to protect the secondary battery, by controlling charging and discharging the secondary battery when at least one fault is detected among the overcharge, the over-discharge and the overcurrent, anda delay circuit configured to generate a delay time to be passed before controlling charging and discharging the secondary battery after the fault has been detected,comprising:

  • a memory unit configured to store both data of characteristic setting data for setting a circuit characteristic of the battery protection IC, and characteristic adjustment data for adjusting an individual difference of the circuit characteristic of the battery protection IC; and

    a setting circuit configured to automatically set the circuit characteristic, and to adjust the individual difference, based on both of said data output from the memory unit,wherein the memory unit includesa set of a pair of non-volatile memory cells to complementarily store one bit, and a latch circuit having direct cross-coupled connections with outputs of the pair of memory cells, provided for each bit of both of said data,wherein the latch circuit automatically statically outputs the data stored in the memory cells provided for both of said data to the setting circuit when a power source of the battery protection IC rises.

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