Power reception control device, power reception device, and electronic instrument
First Claim
1. A power reception control device provided in a power reception device of a non-contact power transmission system, the non-contact power transmission system transmitting power from a power transmission device to the power reception device that includes a rectifier circuit and a regulator by electromagnetically coupling a primary coil and a secondary coil, the non-contact power transmission system transmitting the power to a load from a voltage output node of the power reception device, the power reception control device comprising:
- a power reception control circuit that monitors at least one of a voltage at an input terminal and a voltage at an output terminal of the regulator provided in the power reception device, and, when a capability of supplying power to the load has decreased due to a decrease in at least one of the voltage at the input terminal and the voltage at the output terminal, the power reception control circuit causing a switch circuit provided between the input terminal and the output terminal of the regulator to be turned ON to form a bypass path that directly connects the input terminal and the output terminal of the regulator.
1 Assignment
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Accused Products
Abstract
A power reception device utilizing non-contact power transmission causes a PMOS transistor as a switch circuit to be turned ON when a secondary battery is in a heavy-load state to form a path which bypasses a series regulator (LDO) as a power supply circuit, and supplies a charging current to the secondary battery through the bypass path. An offset may be provided between ON/OFF control threshold values of the PMOS transistor. The series regulator (LDO) may be entirely or partially set in a non-operating state when forming the bypass path.
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Citations
14 Claims
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1. A power reception control device provided in a power reception device of a non-contact power transmission system, the non-contact power transmission system transmitting power from a power transmission device to the power reception device that includes a rectifier circuit and a regulator by electromagnetically coupling a primary coil and a secondary coil, the non-contact power transmission system transmitting the power to a load from a voltage output node of the power reception device, the power reception control device comprising:
a power reception control circuit that monitors at least one of a voltage at an input terminal and a voltage at an output terminal of the regulator provided in the power reception device, and, when a capability of supplying power to the load has decreased due to a decrease in at least one of the voltage at the input terminal and the voltage at the output terminal, the power reception control circuit causing a switch circuit provided between the input terminal and the output terminal of the regulator to be turned ON to form a bypass path that directly connects the input terminal and the output terminal of the regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification