Renesas Electronics America Inc.

Renesas Electronics Corporation

Renesas Technology Corp.

Yashima Denki Co., Ltd.

Takao Hidaka

Tetsuo Sato

Tsutomu Kawano

Ryoji Kato

Tsuyoshi Ota

Koji Kashimoto

Junko Kimura

Mikihiko Komatsu

Yoshiyuki Nakagomi

A battery management method and apparatus. In one embodiment of the method, a source current is divided into Ic and Icr. Ic is transmitted to and charges a battery. A first voltage is generated that is related to Icr. The first voltage is converted into a first digital signal. A processing unit receives and processes the first digital signal in accordance with instructions stored in a memory. The transmission of Ic to the battery is interrupted in response to the processing unit processing the first digital signal. Current provided by the battery is divided into Idc and Idcr. Idc is transmitted to a device. A second voltage is generated that is related to Idcr. The second voltage is converted into a second digital signal. The processing unit receives and processes the second digital signal in accordance with instructions stored in the memory. The transmission of Idc to the battery is interrupted in response to the processing unit processing the second digital signal.

Battery management control method

A voltage generated in any of a plurality of semiconductor chips is supplied to another chip as a power supply voltage to realize a stable operation of a semiconductor device in which the semiconductor chips are stacked in the same package. For example, two chips are stacked with each other, first to third pads are disposed along corresponding sides of the respective chips, which are arranged close and in parallel to each other, and these pads are commonly connected to each other with first to third metal wires, respectively. In another example, fourth and fifth pads are disposed along a side different from a side along which the first to third pads are disposed, and further connected to each other with a fourth metal wire directly between the chips.

Semiconductor device for battery power voltage control

In one embodiment of the cold end switch battery management control method, a battery generates an output voltage at a positive terminal thereof. A first control voltage is also generated by an integrated circuit. A gate of a field effect transistor (FET) receives the first control voltage, wherein the FET comprises a drain and a source with the source coupled to a negative terminal of the battery. The FET transmits current towards the battery in response to the gate receiving the first control voltage, wherein the first control voltage is greater than the output voltage, and wherein the first control voltage is less than a breakdown voltage of the integrated circuit.

Cold end switch battery management control method

A voltage generated in any of a plurality of semiconductor chips is supplied to another chip as a power supply voltage to realize a stable operation of a semiconductor device in which the semiconductor chips are stacked in the same package. For example, two chips are stacked with each other, first to third pads are disposed along corresponding sides of the respective chips, which are arranged close and in parallel to each other, and these pads are commonly connected to each other with first to third metal wires respectively. In another example, fourth and fifth pad are disposed along a side different form a side along which the first to third pads are disposed, and further connected to each other with a fourth metal wire directly between the chips.

A first voltage source terminal, to which a first voltage is input, is connected to a maximum voltage terminal of serially-connected secondary batteries to be monitored. A second voltage source terminal, to which a second voltage is input, is connected to a minimum voltage terminal of the secondary batteries. A battery-voltage detecting unit outputs a detection signal based on a result of a voltage monitoring. A first reference-voltage generating unit receives the first and the second voltages as operating voltages, and generates a first reference voltage. A voltage converting unit receives the detection signal, and converts the detection signal received into either the first reference voltage or the second voltage. An output terminal outputs the detection signal converted, as an output detection signal.

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Tokyo, Japan

Takao Hidaka