Charger circuit and capacitive power conversion circuit and reverse blocking switch circuit thereof
First Claim
1. A charger circuit, configured to operably convert an input power to a DC power and convert the DC power to a charging power for charging a battery, wherein the DC power includes a DC voltage and a DC current and the charging power includes a charging voltage and a charging current;
- the charger circuit comprising;
a power delivery unit, configured to operably convert the input power to the DC power; and
at least one capacitive power conversion circuit, including;
a conversion switch circuit, configured to operably convert the DC power to a converted output power which includes a converted output voltage and a converted output current, wherein the charging power is related to the converted output power;
wherein the conversion switch circuit includes plural conversion switches, configured to be coupled to at least one conversion capacitor, wherein at least one of the conversion switches includes a body diode;
a control circuit, configured to operably generate a conversion switch control signal to control the plural conversion switches; and
at least one reverse blocking switch circuit, coupled with the battery and the conversion switch circuit in series, and configured to block a parasitic body current flowing through the body diode of the conversion switch, wherein the reverse blocking switch circuit includes at least one reverse blocking switch which has a body diode, and the body diode of the reverse blocking switch is reversely coupled to said body diode of the conversion switch;
wherein in a charging mode, the power delivery unit regulates the DC current to a predetermined DC current level, and/or regulates the DC voltage to a predetermined DC voltage level, and during plural charging conversion time periods in a cycle period, the conversion switch control signal operates the plural conversion switches so as to electrically connect the conversion capacitor between a pair of nodes selected from one or more charging voltage division nodes, the DC voltage, and a ground node periodically, such that the charging current is scaled-up of the predetermined DC current level substantially by a predetermined factor, the factor being larger than 1 whereby the charging current is larger than the DC output current, and/or the charging voltage is substantially a predetermined voltage ratio of the predetermined DC voltage level;
wherein the converted output power is generated through one of the one or more charging voltage division nodes.
1 Assignment
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Accused Products
Abstract
A charger circuit for providing a charging current and voltage to a battery includes a power delivery unit, a capacitive power conversion circuit and a reverse blocking switch circuit. The power delivery unit converts an input power to a DC voltage and current. The capacitive power conversion circuit includes a conversion switch circuit including plural conversion switches coupled with one or more conversion capacitors, and a conversion control circuit. The DC current is regulated to a predetermined DC current level, and the conversion control circuit controls the connections of the plural conversion capacitors such that the charging current is scaled-up of the predetermined DC current level substantially by a current scale-up factor. The reverse blocking switch circuit is coupled in series with the capacitive power conversion circuit. The body diode of the reverse blocking switch is reversely coupled to the body diode of the conversion switch.
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Citations
14 Claims
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1. A charger circuit, configured to operably convert an input power to a DC power and convert the DC power to a charging power for charging a battery, wherein the DC power includes a DC voltage and a DC current and the charging power includes a charging voltage and a charging current;
- the charger circuit comprising;
a power delivery unit, configured to operably convert the input power to the DC power; and at least one capacitive power conversion circuit, including; a conversion switch circuit, configured to operably convert the DC power to a converted output power which includes a converted output voltage and a converted output current, wherein the charging power is related to the converted output power;
wherein the conversion switch circuit includes plural conversion switches, configured to be coupled to at least one conversion capacitor, wherein at least one of the conversion switches includes a body diode;a control circuit, configured to operably generate a conversion switch control signal to control the plural conversion switches; and at least one reverse blocking switch circuit, coupled with the battery and the conversion switch circuit in series, and configured to block a parasitic body current flowing through the body diode of the conversion switch, wherein the reverse blocking switch circuit includes at least one reverse blocking switch which has a body diode, and the body diode of the reverse blocking switch is reversely coupled to said body diode of the conversion switch; wherein in a charging mode, the power delivery unit regulates the DC current to a predetermined DC current level, and/or regulates the DC voltage to a predetermined DC voltage level, and during plural charging conversion time periods in a cycle period, the conversion switch control signal operates the plural conversion switches so as to electrically connect the conversion capacitor between a pair of nodes selected from one or more charging voltage division nodes, the DC voltage, and a ground node periodically, such that the charging current is scaled-up of the predetermined DC current level substantially by a predetermined factor, the factor being larger than 1 whereby the charging current is larger than the DC output current, and/or the charging voltage is substantially a predetermined voltage ratio of the predetermined DC voltage level;
wherein the converted output power is generated through one of the one or more charging voltage division nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- the charger circuit comprising;
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10. A capacitive power conversion circuit for use in a charger circuit which is configured to operably convert an input power to a DC power and convert the DC power to a charging power for charging a battery, wherein the DC power includes a DC voltage and a DC current and the charging power includes a charging voltage and a charging current, the capacitive power conversion circuit comprising:
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a conversion switch circuit, configured to operably convert the DC power to a converted output power which includes a converted output voltage and a converted output current, wherein the charging power is related to the converted output power;
wherein the conversion switch circuit includes plural conversion switches, configured to be coupled to at least one conversion capacitor, wherein at least one of the conversion switches includes a body diode;a control circuit, configured to operably generate a conversion switch control signal to control the plural conversion switches; and at least one reverse blocking switch circuit, coupled with the battery and the conversion switch circuit in series, and configured to block a parasitic body current flowing through the body diode of the conversion switch, wherein the reverse blocking switch circuit includes at least one reverse blocking switch which has a body diode, and the body diode of the reverse blocking switch is reversely coupled to said body diode of the conversion switch; wherein in a charging mode, during plural charging conversion time periods in a cycle period, the conversion switch control signal operates the plural conversion switches so as to electrically connect the conversion capacitor between a pair of nodes selected from one or more charging voltage division nodes, the DC voltage, and a ground node periodically, such that the charging current is scaled-up of the DC current substantially by a predetermined factor, the factor being larger than 1 whereby the charging current is larger than the DC output current, and/or the charging voltage is substantially a predetermined voltage ratio of the DC voltage;
wherein the converted output power is generated through one of the one or more charging voltage division nodes. - View Dependent Claims (11, 12, 13)
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14. A reverse blocking switch circuit for use in a charger circuit which is configured to operably convert an input power to a DC power and convert the DC power to a charging power for charging a battery, wherein the DC power includes a DC voltage and a DC current and the charging power includes a charging voltage and a charging current, wherein the charger circuit comprises:
- a power delivery unit which is configured to operably convert the input power to the DC power; and
a capacitive power conversion circuit, including;
a conversion switch circuit, configured to operably convert the DC power to a converted output power which includes a converted output voltage and a converted output current, wherein the charging power is related to the converted output power;
wherein the conversion switch circuit includes plural conversion switches, configured to be coupled to at least one conversion capacitor, wherein at least one of the conversion switches includes a body diode;
the reverse blocking switch circuit being coupled with the battery and the conversion switch circuit in series, and configured to block a parasitic body current flowing through the body diode of the conversion switch;
the reverse blocking switch circuit comprising;at least one reverse blocking switch which has a body diode, and the body diode of the reverse blocking switch is reversely coupled to said body diode of the conversion switch; a regulation protection switch, coupled in series with the reverse blocking switch; and a first regulation comparator and/or a second regulation comparator, wherein the first regulation comparator is configured to operably compare a charging current related signal and a regulation current threshold to generate a regulation current comparison result, and control the regulation protection switch according to the regulation current comparison result, such that the charging current is regulated to be not larger than a predetermined regulation current level; and
the second regulation comparator is configured to operably compare a charging voltage related signal and a regulation voltage threshold to generate a regulation voltage comparison result, and control the regulation protection switch according to the regulation voltage comparison result, such that the charging voltage is regulated to be not larger than a predetermined regulation voltage level;wherein in a charging mode, during plural charging conversion time periods in a cycle period, the conversion switch control signal operates the plural conversion switches so as to electrically connect the conversion capacitor between a pair of nodes selected from one or more charging voltage division nodes, the DC voltage, and a ground node periodically, such that the charging current is scaled-up of the DC current substantially by a predetermined factor, the factor being larger than 1 whereby the charging current is larger than the DC output current, and/or the charging voltage is substantially a predetermined voltage ratio of the DC voltage;
wherein the converted output power is generated through one of the one or more charging voltage division nodes.
- a power delivery unit which is configured to operably convert the input power to the DC power; and
Specification