Richtek Technology Corporation

Chih-Hua Hou

Wei-Jen Huang

Tsung-Wei Huang

Shui-Mu Lin

Chun-Hsiung Chang

Fu-Chi Lin

Tsan-Huei Wu

Chiu-Yi Chi

A charging apparatus includes a DC switch circuit, a wireless power unit, a capacitive power conversion unit, and a switching power conversion unit. The charging apparatus operates in at least one of the following modes: in a constant current mode, the capacitive power conversion unit converts a bus current provided by the DC switch circuit or the wireless power unit to generate a predetermined constant charging current on a charging node to charge a battery; in a constant voltage mode, the switching power conversion unit converts a bus voltage provided by the DC switch circuit or the wireless power unit to generate a predetermined charging voltage on the charging node to charge the battery; in a first power output mode, the switching power conversion unit converts the battery voltage to generate an output voltage on a transmission interface pin.

Charging apparatus with multiple power paths

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.

Charger circuit and capacitive power conversion circuit and reverse blocking switch circuit thereof

The present invention discloses an inverter circuit and a method for supplying an inverted voltage. The method for supplying an inverted voltage comprises: providing a power switch and an inductor electrically connected with each other; driving the gate of the power switch by a driver gate, such that an input voltage is converted to a negative voltage supplied to a load; and providing a low operation voltage to the driver gate according to the negative voltage.

Inverter circuit with a driver gate receiving a voltage lower than zero and related method for supplying an inverted voltage

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Hsinchu, Taiwan

Chih-Hua Hou