CN217590618U

CN217590618U - Power supply direct current conversion direct current control circuit with low standby electric quantity loss

Info

Publication number: CN217590618U
Application number: CN202221704037.9U
Authority: CN
Inventors: 庄永彬; 潘迎春
Original assignee: Fujian Quanzhou Senlong Telecom Co ltd
Current assignee: Fujian Quanzhou Senlong Telecom Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-14
Anticipated expiration: 2032-06-29

Abstract

The utility model discloses a power supply DC conversion DC control circuit with low standby electric quantity loss, wherein a first output pin of a DC output socket is connected with the positive output end of a DC-DC conversion module; the normally closed end of the DC output socket is connected to the cathode of a diode D2 through a resistor R6, and the anode of the diode D2 is connected with the G pole of an MOS (metal oxide semiconductor) transistor Q1; the S pole of the MOS tube Q1 is grounded, and the D pole of the MOS tube Q1 is connected with the G pole of the MOS tube Q2 through a resistor R3; the S pole of the MOS tube Q2 is connected with the anode of the battery, and the D pole of the MOS tube Q2 is connected with the input pole of the DC-DC conversion module; the G pole of the MOS tube Q2 is connected with the S pole of the MOS tube Q2 through a voltage stabilizing diode D1, the voltage stabilizing diode D1 is connected with a resistor R2 in parallel, the G pole of the MOS tube Q1 is connected with the negative pole of the battery through a resistor R4 and a capacitor C1 which are connected in parallel, and is also connected with the positive pole of the battery through a resistor R1; and the negative pole of the battery is grounded with the grounding end of the DC-DC conversion module. The utility model discloses make DC-DC module not power consumptive when the standby that stews, reach the purpose of power saving.

Description

Power supply direct current conversion direct current control circuit with low standby electric quantity loss

Technical Field

The utility model relates to a power technology field especially relates to a power direct current conversion direct current control circuit of low standby power loss.

Background

The multifunctional intelligent power supply carried in outdoor service work meets the multifunctional characteristic of one machine, and various functional modules are integrated in the battery. Because the stored electric energy in the battery is limited, the electric energy in outdoor service work is particularly precious, if the standby power consumption of internal circuits is higher, the standby storage time of the battery is too long (for example, after the battery is placed for 1 to 2 years), and when the battery is really needed to be used, the electric energy stored in the battery is too much eaten by the internal circuits. The standby working state of the normal DC-DC conversion circuit module has permanent slight self-power consumption and has no influence on the common environment, but when the circuit is built in a battery, the standby working power consumption of the circuit is obvious, and particularly when the standing standby time of a product is long, the defect is obvious and cannot be accepted by people.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a power dc conversion dc control circuit with low standby power consumption, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a power supply direct current conversion direct current control circuit with low standby electric quantity loss comprises a DC output socket, a DC-DC conversion module, an MOS tube Q1 and an MOS tube Q2, wherein the E1 end of the DC output socket is connected with the output end of the DC-DC conversion module; the E2 end of the DC output socket is connected to the cathode of a diode D2 through a resistor R6, and the anode of the diode D2 is connected with the G pole of an MOS (metal oxide semiconductor) transistor Q1; the S pole of the MOS tube Q1 is grounded, and the D pole of the MOS tube Q1 is connected with the G pole of the MOS tube Q2 through a resistor R3; the S pole of the MOS tube Q2 is connected with the anode of the battery, and the D pole of the MOS tube Q2 is connected with the input end of the DC-DC conversion module; the G pole of the MOS tube Q2 is connected with the S pole of the MOS tube Q2 through a voltage stabilizing diode D1, the voltage stabilizing diode D1 is connected with a resistor R2 in parallel, the G pole of the MOS tube Q1 is connected with the negative pole of the battery through a resistor R4 and a capacitor C1 which are mutually connected in parallel, and is also connected with the positive pole of the battery through a resistor R1; the negative electrode of the battery and the grounding end of the DC-DC conversion module are respectively grounded, the input end of the DC-DC conversion module is grounded through a capacitor C2, and the output end of the DC-DC conversion module is grounded through a capacitor C3 and a capacitor C4 which are mutually connected in parallel.

Further, the D pole of the MOS transistor Q2 is connected to the input terminal of the DC-DC conversion module through a safety resistor R5.

Further, the MOS tube Q1 is an N-channel MOS tube, and the MOS tube Q2 is a P-channel MOS tube.

Further, the capacitors C2, C3, and C4 are electrolytic capacitors.

Advantageous effects

Compared with the prior art, the utility model discloses at least, including following advantage:

when the power supply does not need to work, the DC-DC module is in a shutdown state, and when the power supply needs to work, the DC-DC circuit is awakened to start working, so that the DC-DC module does not consume power when standing and standby, and the purpose of saving power is achieved.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the one element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a power supply DC-to-DC conversion DC control circuit with low standby power consumption includes a DC output socket, a DC-DC conversion module, an MOS transistor Q1 and an MOS transistor Q2, where an E1 end of the DC output socket is connected to an output end of the DC-DC conversion module; the E2 end of the DC output socket is connected to the cathode of a diode D2 through a resistor R6, and the anode of the diode D2 is connected with the G pole of an MOS (metal oxide semiconductor) transistor Q1; the S pole of the MOS tube Q1 is grounded, and the D pole of the MOS tube Q1 is connected with the G pole of the MOS tube Q2 through a resistor R3; the S pole of the MOS tube Q2 is connected with the anode of the battery, and the D pole of the MOS tube Q2 is connected with the input pole of the DC-DC conversion module; the G pole of the MOS tube Q2 is connected with the S pole of the MOS tube Q2 through a voltage stabilizing diode D1, the voltage stabilizing diode D1 is connected with a resistor R2 in parallel, the G pole of the MOS tube Q1 is connected with the negative pole of the battery through a resistor R4 and a capacitor C1 which are mutually connected in parallel, and is also connected with the positive pole of the battery through a resistor R1; the negative electrode of the battery and the grounding end of the DC-DC conversion module are respectively grounded, the input end of the DC-DC conversion module is grounded through a capacitor C2, and the output end of the DC-DC conversion module is grounded through a capacitor C3 and a capacitor C4 which are mutually connected in parallel.

Preferably, the D pole of the MOS transistor Q2 is connected to the input terminal of the DC-DC conversion module through a PTC safety resistor R5, so as to protect the circuit.

In the technical scheme of the utility model, the MOS tube Q1 adopts an N-channel MOS tube, and the type adopted by the embodiment is a 2N7002 MOS tube; MOS pipe Q2 adopts P channel MOS pipe, and this embodiment adopts the MOS pipe that the model is TPC 8117. The model of the DC output socket is DC3513-3P. The capacitors C2, C3 and C4 are electrolytic capacitors.

It should be noted that the DC output socket includes three pins, which are respectively a power supply positive pin E1 end, a negative electrostatic contact E2 end and a negative movable contact E3 end, and under normal conditions, the terminal elastic sheet of the E2 end and the E3 end are short-circuited, and the E3 end is connected to a common ground.

The working principle is as follows: the positive input end and the negative input end of the circuit are directly connected with the corresponding output terminals of the battery respectively, in the embodiment, the positive input end of the circuit is connected with the positive pole of the 15V battery, the negative input end of the circuit is connected with the negative pole of the battery, and meanwhile, the negative pole of the circuit is connected with the common ground. Under normal conditions, when no external plug is inserted into the DC output socket, the tail end elastic sheet at the E2 end in the DC output socket is always in a short circuit state to the E3 end of the negative movable contact, so that the G pole of the MOS tube 2N7002 is in a low potential state, the D pole of the MOS tube 2N7002 is always in a high potential state, the P-channel TPC8117 power mosfet tube enables the DS poles to be in an open circuit state because the G pole is in the high potential state, and at the moment, the DC-DC conversion module is in a halt state because no power supply is input, so that the purpose of zero power consumption is achieved; when a plug wire is inserted into the output socket, the tail end elastic sheet at the E2 end is jacked open due to the plug insertion, at the moment, an open circuit state is formed between the E2 end and the public ground, at the moment, the circuit is reversed, the E2 end has a high potential, and further the potential of the G pole of the MOS tube 2N7002 is in a high potential state, so that the D pole becomes a low potential, the TPC8117 switch is controlled to turn on the circuit, the DC-DC module is turned on to work due to power supply input, and power is supplied to the outside. When the plug cord is unplugged, the DC-DC conversion module stops working and is in an ultra-low power consumption state.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A power supply direct current conversion direct current control circuit with low standby electric quantity loss is characterized by comprising a DC output socket, a DC-DC conversion module, an MOS tube Q1 and an MOS tube Q2, wherein the E1 end of the DC output socket is connected with the output end of the DC-DC conversion module; the E2 end of the DC output socket is connected to the cathode of a diode D2 through a resistor R6, and the anode of the diode D2 is connected with the G pole of an MOS tube Q1; the S pole of the MOS tube Q1 is grounded, and the D pole of the MOS tube Q1 is connected with the G pole of the MOS tube Q2 through a resistor R3; the S pole of the MOS tube Q2 is connected with the anode of the battery, and the D pole of the MOS tube Q2 is connected with the input end of the DC-DC conversion module; the G pole of the MOS tube Q2 is connected with the S pole of the MOS tube Q2 through a voltage stabilizing diode D1, the voltage stabilizing diode D1 is connected with a resistor R2 in parallel, the G pole of the MOS tube Q1 is connected with the negative pole of the battery through a resistor R4 and a capacitor C1 which are connected in parallel, and is also connected with the positive pole of the battery through a resistor R1; the negative electrode of the battery and the grounding end of the DC-DC conversion module are respectively grounded, the input end of the DC-DC conversion module is grounded through a capacitor C2, and the output end of the DC-DC conversion module is grounded through a capacitor C3 and a capacitor C4 which are mutually connected in parallel.

2. The power DC-DC conversion control circuit with low standby power consumption of claim 1, wherein the D pole of the MOS transistor Q2 is connected to the input terminal of the DC-DC conversion module through a safety resistor R5.

3. The power supply dc-dc conversion control circuit with low standby power consumption of claim 1, wherein said MOS transistor Q1 is an N-channel MOS transistor, and said MOS transistor Q2 is a P-channel MOS transistor.

4. A low standby power consumption dc-dc conversion circuit as claimed in claim 1, wherein the capacitors C2, C3 and C4 are electrolytic capacitors.