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Power control circuit, power device, electronic device and power control method

A technology for controlling circuits and power supplies, applied in high-efficiency power electronic conversion, control/regulation systems, output power conversion devices, etc., can solve problems such as electronic equipment failures

Active Publication Date: 2016-12-07
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the voltage sources are started in the wrong order in the start sequence or stopped in the wrong order in the stop sequence, electronic equipment may malfunction

Method used

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  • Power control circuit, power device, electronic device and power control method
  • Power control circuit, power device, electronic device and power control method
  • Power control circuit, power device, electronic device and power control method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] will refer to Figure 1 to Figure 8 An embodiment is described. like figure 1 As shown, the DC-DC converter 1 is a synchronous rectification DC-DC step-down converter that generates an output voltage Vo lower than the input voltage Vi supplied to the input terminal Ti based on the input voltage Vi. The output voltage Vo is supplied to the load 2 coupled to the output terminal To. Examples of the load 2 are internal circuits of mobile electronic devices (personal computers, mobile phones, game devices, digital cameras, etc.), rechargeable batteries such as lithium batteries included in notebook personal computers, and the like.

[0018] The DC-DC converter 1 includes a converter 10 that generates an output voltage Vo based on an input voltage Vi, and a control circuit 20 that controls the converter 10 based on the output voltage Vo.

[0019] Converter 10 includes transistors T1 and T2, coil L1, and capacitor C1. The transistor T1 and the coil L1 of the main side are ...

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PUM

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Abstract

The application discloses a power supply control circuit, a power supply device, electronic equipment and a power supply control method. The control circuit includes a detection circuit configured to detect a load current flowing into the load, and a setting circuit that sets switching operations of the first switching circuit and the second switching circuit according to the load current. The setting circuit is configured to make both the first switch circuit and the second switch circuit in an off state if the load current is within a first range when a power supply stop signal is input from the outside, and if the load current is higher than the first range as the first range. The first reference value of the upper limit of the range enables the first switch circuit to perform an on-off operation based on the output voltage while keeping the second switch circuit in an off state.

Description

technical field [0001] The invention relates to a control circuit of a power supply, a power supply device, electronic equipment and a power supply control method. Background technique [0002] Electronic equipment includes switching power supplies that provide power to loads. Switching power supplies are, for example, DC-DC converters that convert DC voltages into other DC voltages. An electronic device including various voltage sources having different voltage values ​​may include a plurality of DC-DC converters for each voltage source. It is important to start the multiple voltage sources in the proper sequence when starting the electronic device and to stop the multiple voltage sources in a proper sequence when stopping the electronic device. Electronic equipment may malfunction if the voltage sources are started in the wrong order during the start sequence or stopped in the proper order during the stop sequence. For example, a state may be maintained in which a forwa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/00
CPCH02M3/1588H04W52/0277Y02B70/10Y02D30/70H02M1/0003H02M1/0032H02M1/0009H04W48/04H04W64/006
Inventor 长谷川守仁
Owner SOCIONEXT INC