A circuit that can reduce the working voltage

A technology of working voltage and circuit, which is applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems of high working voltage of battery power supply circuit and small application range of battery power supply circuit, so as to reduce the minimum working voltage and ensure safety , the effect of increasing the working range

Active Publication Date: 2022-06-28
BATELAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above circuit structure, the minimum operating voltage occurs when the load is very light and the output current is small, VIN>VBTSU0+ VD5+VD4+VM7, and at this time due to the existence of diode D4, the operating voltage of the battery-powered circuit is relatively low. High, the application range of battery-powered circuits is small

Method used

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  • A circuit that can reduce the working voltage
  • A circuit that can reduce the working voltage
  • A circuit that can reduce the working voltage

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Embodiment Construction

[0038] The technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0039] It should be understood that the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship. For example, if A indicates B, it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

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Abstract

The application includes a circuit capable of reducing working voltage, and specifically relates to the technical field of battery power supply. The circuit includes an external circuit and an integrated circuit chip; in the external circuit, the power supply voltage is transmitted to the first end of the boost drive capacitor through the first pin; the second end of the boost drive capacitor is connected to the second pin ; the second pin is also connected to the output voltage terminal through the power inductor in the external circuit; in the integrated circuit chip, there is an isolation island for grounding in the first switch tube and the second switch tube; the drain of the first switch tube is connected to the second switch tube The two pins are connected; the back grid of the first switching tube is connected to the source of the second switching tube; the first switching tube is connected to the gate of the second switching tube; the back grid of the second switching tube is connected to the source of the first switching tube pole connection; the drain of the second switching tube is grounded. The above circuit reduces the minimum operating voltage of the battery-powered circuit while ensuring the safety of the circuit operation, thereby increasing the working range of the battery-powered circuit.

Description

technical field [0001] The invention relates to the field of battery power supply, in particular to a circuit capable of reducing working voltage. Background technique [0002] A common battery power supply circuit in this field is a step-down converter circuit, such as figure 1 As shown, the battery power supply circuit obtains the corresponding output voltage by controlling the turn-on and turn-off of the power switch tube M6, and outputs it to the battery load. [0003] Among them, VIN0 is connected to the input terminal of the battery power supply circuit, VOUT0 is connected to the output terminal of the battery power supply circuit, M6 is the power switch tube of the battery power supply circuit, D6 is the freewheeling diode of the battery power supply circuit, L is the power inductance of the battery power supply circuit, and COUT0 is The output filter capacitor of the battery power supply circuit, CBST0 is the boost drive capacitor of the power switch tube M6, M7 is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158H02M1/32H02M1/14H02J7/00
Inventor 不公告发明人
Owner BATELAB CO LTD
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