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Discharge circuit and electronic equipment

A technology for discharge circuits and electronic equipment, applied in battery circuit devices, circuit devices, load supply circuits, etc., can solve problems such as low efficiency, high efficiency, and insufficient use of battery power

Active Publication Date: 2019-05-21
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dual-cell series battery solution is adopted, and the battery output voltage is up to about 8.8V, and the voltage range exceeds the current chip withstand voltage range, so it is necessary to use a step-down method. There are many ways to reduce the voltage, such as step-down through the Buck circuit. The voltage is constant, but the efficiency is low; or through the charge pump circuit (Charge Pump) chip to step down, the advantage is high efficiency, the disadvantage is that the output voltage varies with the input voltage, and the battery power cannot be fully utilized

Method used

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  • Discharge circuit and electronic equipment
  • Discharge circuit and electronic equipment
  • Discharge circuit and electronic equipment

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Embodiment Construction

[0035] Embodiments of the present application are described below in conjunction with the accompanying drawings.

[0036] The electronic equipment adopts the dual-cell series battery scheme, and the battery output voltage is up to about 8.8V, and the voltage range exceeds the current withstand voltage range of the chip, so it needs to be used for step-down. The embodiment of this application provides a discharge circuit for turning the power supply The voltage drops to the range required by the chips inside the electronic device.

[0037] see Figure 1a , Figure 1a It is a schematic circuit diagram of a discharge circuit provided in an embodiment of the present application, and the discharge circuit is applied to an electronic device. Such as Figure 1a As shown, the discharge circuit includes: a detection circuit 101, a Buck circuit 102, a charge pump circuit 103 and a control circuit 104; wherein, the input port of the Buck circuit 102 and the input port of the charge pump ...

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Abstract

The invention discloses a discharge circuit, which comprises a detection circuit, a Buck circuit, a charge pump circuit and a control circuit, wherein the detection circuit detects the voltage of thefirst port of the detection circuit; if the voltage of the first port of the detection circuit is greater than a first threshold value, the control circuit controls the charge pump circuit to discharge; and if the voltage of the first port of the detection circuit is smaller than a second threshold value, the control circuit controls the Buck circuit to discharge. The embodiment of the invention is favorable for improving the discharge efficiency of a battery, and therefore, the electric quantity of the battery can be fully utilized.

Description

technical field [0001] The present application relates to the field of integrated circuits, in particular to a discharge circuit and an electronic device. Background technique [0002] As consumer electronic products such as mobile phones require higher and higher charging speeds, the series battery solution will gradually be adopted by manufacturers due to the advantage of less heat generated during charging. At present, the chip withstand voltage range of mobile phone electronic products matches the voltage of single-cell lithium batteries, generally <5.5V (the highest voltage of lithium batteries is generally around 4.4V). The dual-cell series battery solution is adopted, and the battery output voltage is up to about 8.8V, and the voltage range exceeds the current chip withstand voltage range, so it is necessary to use a step-down method. There are many ways to reduce the voltage, such as step-down through the Buck circuit. The voltage is constant, but the efficiency ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J7/0063H02J7/00712H02J7/007188H02J2207/20H02J7/007194H02M3/155
Inventor 汪会郑志勇
Owner HUAWEI TECH CO LTD
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