CHARGE CIRCUIT
First Claim
1. A charge circuit, comprising:
- a comparator, first to third electronic switches, and first to fourth resistors, wherein a voltage for charging a battery is output from an output of the charge circuit, the output of the charge circuit is grounded through the first and second resistors in that order, a node between the first and second resistors are connected to a non-inverting input terminal of the comparator, an inverting input terminal of the comparator is connected to an anode of the battery, an output terminal of the comparator is connected to control terminals of the first and third electronic switches, a first terminal of the first electronic switch is connected to the output of the charge circuit and the control terminal of the second electronic switch, a second terminal of the first electronic switch is grounded, a first terminal of the second electronic switch is connected to the output of the charge circuit, a second terminal of the second electronic switch is connected to the anode of the battery through the third resistor, a first terminal of the third electronic switch is connected to the output of the charge circuit, a second terminal of the third electronic switch is connected to the anode of the battery through the fourth resistor, a cathode of the battery is grounded, a resistance of the third resistor is smaller than the fourth resistor, when the control terminal of the first electronic switch receives a high level signal, the first terminal of the first electronic switch is connected to the second terminal of the first electronic switch, when the control terminal of the first electronic switch receives a low level signal ,the first terminal of the first electronic switch is disconnected from the second terminal of the first electronic switch, when the control terminal of the second electronic switch receives a high level signal, the first terminal of the second electronic switch is disconnected from the second terminal of the second electronic switch, when the control terminal of the second electronic switch receives a low level signal, the first terminal of the second electronic switch is connected to the second terminal of the second electronic switch, when the control terminal of the third electronic switch receives a high level signal, the first terminal of the third electronic switch is disconnected from the second terminal of the third electronic switch, when the control terminal of the third electronic switch receives a low level signal, the first terminal of the third electronic switch is connected to the second terminal of the third electronic switch, the output terminal of the comparator is connected to the control terminal of the third electronic switch through a first diode, an anode of the first diode is connected to the control terminal of the third electronic switch, and a cathode of the first diode is connected to the output terminal of the comparator.
1 Assignment
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Accused Products
Abstract
A charge circuit includes a comparator, first through third electronic switches, first through tenth resistors. A voltage for charging a battery is output to an output of the charge circuit. The output of the charge circuit is grounded through the first and second resistors in that order. A node between the first and second resistors is electrically connected to a non-inverting input terminal of the comparator. An inverting input terminal of the comparator is electrically connected to an anode of the battery. An output terminal of the comparator is electrically connected to the first and third electronic switches. The first electronic switch is electrically connected to the second electronic switch. The second and third electronic switches are selectively turned on according to a voltage of the anode of the battery to change a charging current to the battery.
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Citations
9 Claims
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1. A charge circuit, comprising:
- a comparator, first to third electronic switches, and first to fourth resistors, wherein a voltage for charging a battery is output from an output of the charge circuit, the output of the charge circuit is grounded through the first and second resistors in that order, a node between the first and second resistors are connected to a non-inverting input terminal of the comparator, an inverting input terminal of the comparator is connected to an anode of the battery, an output terminal of the comparator is connected to control terminals of the first and third electronic switches, a first terminal of the first electronic switch is connected to the output of the charge circuit and the control terminal of the second electronic switch, a second terminal of the first electronic switch is grounded, a first terminal of the second electronic switch is connected to the output of the charge circuit, a second terminal of the second electronic switch is connected to the anode of the battery through the third resistor, a first terminal of the third electronic switch is connected to the output of the charge circuit, a second terminal of the third electronic switch is connected to the anode of the battery through the fourth resistor, a cathode of the battery is grounded, a resistance of the third resistor is smaller than the fourth resistor, when the control terminal of the first electronic switch receives a high level signal, the first terminal of the first electronic switch is connected to the second terminal of the first electronic switch, when the control terminal of the first electronic switch receives a low level signal ,the first terminal of the first electronic switch is disconnected from the second terminal of the first electronic switch, when the control terminal of the second electronic switch receives a high level signal, the first terminal of the second electronic switch is disconnected from the second terminal of the second electronic switch, when the control terminal of the second electronic switch receives a low level signal, the first terminal of the second electronic switch is connected to the second terminal of the second electronic switch, when the control terminal of the third electronic switch receives a high level signal, the first terminal of the third electronic switch is disconnected from the second terminal of the third electronic switch, when the control terminal of the third electronic switch receives a low level signal, the first terminal of the third electronic switch is connected to the second terminal of the third electronic switch, the output terminal of the comparator is connected to the control terminal of the third electronic switch through a first diode, an anode of the first diode is connected to the control terminal of the third electronic switch, and a cathode of the first diode is connected to the output terminal of the comparator.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification