Charge/discharge control circuit and battery device including the same
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United States of America Patent
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Jun 16, 2020
Grant Date -
Mar 1, 2018
app pub date -
Aug 29, 2017
filing date -
Aug 30, 2016
priority date (Note) -
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Abstract
Provided are a charge/discharge control circuit capable of using an FET having a low withstand voltage. The charge/discharge control circuit is configured to control charging and discharging of a secondary cell, and includes: a positive power supply terminal and a negative power supply terminal for monitoring a voltage of the secondary cell; a charge control terminal configured to connect to a gate of a charge control FET, the charge control FET having one end connected to an external negative terminal to which a negative electrode of a load or a charger is connected; and a clamp circuit configured to clamp a signal at a high level for turning on the charge control FET to a voltage that is higher than a reference voltage by a predetermined voltage, the reference voltage being a voltage at the external negative terminal, the signal being output to the charge control terminal.
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