CRADLE CHARGER CONTROLLER WITH BELOW GROUND LEVEL BIASING
First Claim
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1. A cradle charging system, comprising:
- a charging cradle defining a space for receiving a battery of an electronic device;
a transformer charging circuitry for charging the battery in the electronic device, the transformer charging circuitry further comprising;
primary side circuitry for receiving a charging voltage;
secondary side circuitry for inductively coupling the charging voltage to the battery, wherein the secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery, wherein the secondary side circuitry has a negative voltage for a ground reference.
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Abstract
A cradle charging system comprises a charging cradle defining a space for a battery of an electronic device. Transformer charging circuitry for charging the battery in the electronic device includes a primary side circuitry for receiving a charging voltage. Secondary side circuitry inductively couples the charging voltage to the battery. The secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery.
15 Citations
19 Claims
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1. A cradle charging system, comprising:
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a charging cradle defining a space for receiving a battery of an electronic device; a transformer charging circuitry for charging the battery in the electronic device, the transformer charging circuitry further comprising; primary side circuitry for receiving a charging voltage; secondary side circuitry for inductively coupling the charging voltage to the battery, wherein the secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery, wherein the secondary side circuitry has a negative voltage for a ground reference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cradle charging system, comprising:
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a charging cradle defining a space for receiving a battery of an electronic device; a transformer charging circuitry for charging the battery in the electronic device, the transformer charging circuitry further comprising; primary side circuitry for receiving a charging voltage; secondary side circuitry for inductively coupling the charging voltage to the battery, wherein the secondary side circuitry provides a controlled output signal based on either constant voltage control or constant current control responsive to a charge level of the battery wherein the secondary side circuitry has a negative voltage for a ground reference; and a control circuit for generating the controlled output signal responsive to a battery control signal indicating whether the battery is a one cell or a two cell battery and to either a monitored charging voltage of the battery or a monitored charging current of the battery. - View Dependent Claims (9, 10, 11, 12)
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13. A method for charging a battery using a cradle charger circuit, comprising the steps of:
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monitoring a charging voltage applied to the battery; monitoring a charging current applied to the battery; selecting a control signal comprising either of a constant current signal or a constant voltage signal responsive to a charge level of the battery; and controlling charging of the battery responsive to the control signal. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification