Charge-discharge control circuit, charge-discharge control device, and battery device
A charge-discharge control circuit includes a positive power-supply terminal; a negative power-supply terminal; a charge-discharge discrimination circuit which discriminates a discharging state in which a discharging current flows and a charging state in which a charging current flows based on a voltage at a charge-discharge path and a preset charge-discharge discrimination voltage; and a control circuit which turns on a discharge control FET and a charge control FET in a charge-inhibition state and the discharging state or turns off the charge control FET in the charge-inhibition state and the charging state.
1. A charge-discharge control circuit, comprising:
a positive power-supply terminal;
a negative power-supply terminal;
a charge-discharge discrimination circuit configured to discriminate a discharging state in which a discharging current flows and a charging state in which a charging current flows based on a voltage at a charge-discharge path and a preset charge-discharge discrimination voltage; and
a control circuit configured to:
turn on a discharge control FET and a charge control FET when in a charge-inhibition state and in the discharging state; and
turn off the charge control FET when in the charge-inhibition state and in the charging state.
2. The charge-discharge control circuit according to claim 1 , wherein the charge-discharge discrimination voltage is set to a voltage at the negative power-supply terminal.
3. The charge-discharge control circuit according to claim 1 , wherein the charge-discharge discrimination voltage is set to a voltage at the positive power-supply terminal.
4. A charge-discharge control device, comprising:
a discharge control FET configured to control discharging;
a charge control FET configured to control charging; and
the charge-discharge control circuit according to claim 1 .
5. A battery device, comprising:
a battery; and
the charge-discharge control device configured to control charging and discharging of the battery according to claim 4 .
6. A charge-discharge control circuit, comprising:
a positive power-supply terminal;
a negative power-supply terminal;
a charge-discharge discrimination circuit configured to discriminate a charging state in which a charging current flows and a discharging state in which a discharging current flows based on a voltage in a charge-discharge path and a preset charge-discharge discrimination voltage; and
a control circuit configured to:
turn on a discharge control FET and a charge control FET when in a discharge-inhibition state and in the charging state; and
turn off the discharge control FET when in the discharge-inhibition and in the discharging state.
7. The charge-discharge control circuit according to claim 6 , wherein the charge-discharge discrimination voltage is set to a voltage at the negative power-supply terminal.
8. The charge-discharge control circuit according to claim 6 , wherein the charge-discharge discrimination voltage is set to a voltage at the positive power-supply terminal.
9. A charge-discharge control device, comprising:
a discharge control FET configured to control discharging;
a charge control FET configured to control charging; and
the charge-discharge control circuit according to claim 6 .
10. A battery device, comprising:
a battery; and
the charge-discharge control device configured to control charging and discharging of the battery according to claim 9 .