Charging and power supply for mobile devices
DC CAFCFirst Claim
1. A USB-compliant charging and power supply circuit comprising:
- switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power, through an output node, to an electronic system of an electronic communication device and to a battery, said switch-mode battery charging circuitry having an integrated circuit and an inductor, said integrated circuit arranged to cooperate with said inductor to provide current of said output power of greater magnitude than current of said power received from said external power source;
battery isolation circuitry including a semiconductor switch connecting the output node to said battery, the battery isolation circuitry sensing voltage at said output node and variably restricting current to said battery when said voltage is below a minimum voltage value by operationally controlling said semiconductor switch as current passes through it; and
additional circuitry in electrical communication with said battery isolation circuitry for receiving feedback from the electronic system and, in response to the feedback, adjusting the minimum voltage value in relation to requirements of said electronic system;
whereby during variable current restriction said electronic system is supplied required power with said battery being supplied any additional available power.
4 Assignments
Litigations
1 Petition
Accused Products
Abstract
Charging and power supply for mobile devices is disclosed. A USB-compliant charging and power supply circuit includes switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power through an output node to an electronic system of an electronic communication device and a battery. Battery isolation circuitry includes a semiconductor switch connecting the output node to the battery. The battery isolation circuitry senses voltage at the output node and variably restricts current to the battery when the voltage is below a minimum voltage value by operationally controlling the semiconductor switch as current passes through it. During variable current restriction the electronic system is supplied required power with said battery being supplied any additional available power.
31 Citations
12 Claims
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1. A USB-compliant charging and power supply circuit comprising:
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switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power, through an output node, to an electronic system of an electronic communication device and to a battery, said switch-mode battery charging circuitry having an integrated circuit and an inductor, said integrated circuit arranged to cooperate with said inductor to provide current of said output power of greater magnitude than current of said power received from said external power source; battery isolation circuitry including a semiconductor switch connecting the output node to said battery, the battery isolation circuitry sensing voltage at said output node and variably restricting current to said battery when said voltage is below a minimum voltage value by operationally controlling said semiconductor switch as current passes through it; and additional circuitry in electrical communication with said battery isolation circuitry for receiving feedback from the electronic system and, in response to the feedback, adjusting the minimum voltage value in relation to requirements of said electronic system; whereby during variable current restriction said electronic system is supplied required power with said battery being supplied any additional available power. - View Dependent Claims (2, 3, 4, 5)
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6. An electronic communication device electrically connectable to an external power source, the device comprising:
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a device housing; a rechargeable battery contained within said housing; an electronic system contained within said housing; switch-mode battery charging circuitry for receiving power from an external power source and for supplying output power, through an output node, to said electronic system and to said battery, said switch-mode battery charging circuitry having an integrated circuit and an inductor, said integrated circuit arranged to cooperate with said inductor to provide current of said output power of greater magnitude than current of said power received from said external power source; and battery isolation circuitry including a semiconductor switch connecting the output node to said battery, said battery isolation circuitry sensing voltage at said output node and variably restricting current to said battery when said voltage is below a minimum voltage value by operationally controlling said semiconductor switch as current passes through it; and additional circuitry in electrical communication with said battery isolation circuitry for receiving feedback from the electronic system and, in response to the feedback, adjusting the minimum voltage value in relation to requirements of said electronic system; whereby during variable current restriction said electronic system is supplied required power with said battery being supplied any additional available power. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification