CN209516960U - A kind of low power consumption switch power control system - Google Patents

A kind of low power consumption switch power control system Download PDF

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Publication number
CN209516960U
CN209516960U CN201920372373.XU CN201920372373U CN209516960U CN 209516960 U CN209516960 U CN 209516960U CN 201920372373 U CN201920372373 U CN 201920372373U CN 209516960 U CN209516960 U CN 209516960U
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China
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power module
control
power
voltage
mcu controller
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CN201920372373.XU
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Inventor
戴佩刚
戴鲁杰
孙子乂
许景涛
陈汉生
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Shanghai Shenrui Power Electronics Co Ltd
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Shanghai Shenrui Power Electronics Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The utility model relates to a kind of low power consumption switch power control systems, including control chip interconnected and AC-DC power module, the output end of the AC-DC power module is also connected with current collection circuit, the current collection circuit is used to detect the electric current of the AC-DC power module output, and is transferred to MCU controller;The MCU controller issues control signal when the current value received is less than setting value and is kept for a period of time, to the control chip, and the control chip enters intermittent duty according to the control signal control AC-DC power module received.The utility model can reduce power standby power consumption.

Description

A kind of low power consumption switch power control system
Technical field
The utility model relates to power electronics fields, more particularly to a kind of low power consumption switch power control system.
Background technique
As energy efficiency and environmentally friendly become more and more important, people wait for that engine efficiency it is expected higher and higher, client to Switching Power Supply It is required that the power supply product that power supply manufacturer provides is able to satisfy green energy resource standard, and six grades of the Energy Star requirements to Switching Power Supply Be: rated power is the Switching Power Supply of 0~1W, 1~49W and 50W~250W, and stand-by power consumption need to be respectively smaller than 0.1W, 0.1W and 0.21W.And when most of Switching Power Supplies are transferred to underloading and standby mode by nominal load at present, power-efficient sharply declines, to Engine efficiency cannot be met the requirements.Reduce Switching Power Supply idling consumption, improve to engine efficiency, first has to analysis Switching Power Supply loss Composition.By taking flyback power supply as an example, working loss is mainly shown as: MOSFET conduction loss, MOSFET parasitic capacitance damage Consumption switchs overlapping loss, PWM controller and its start-up resistor loss, output rectifying tube loss, clamp protection circuits loss etc..
The utility model inventors have found that in standby mode, main circuit current is smaller, and MOSFET turn-on time ton is very Small, circuit works in DCM mode, therefore relevant conduction loss, and secondary commutation pipe loss etc. is smaller, is lost at this time mainly by parasitism Capacity loss and start-up resistor loss are constituted, and the loss of parasitic capacitance loss is inherently present, and start-up resistor be lost be can With what is controlled by additional auxiliary circuit.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of low power consumption switch power control systems, can reduce Power standby power consumption.
The technical scheme adopted by the utility model to solve the technical problem is as follows: providing a kind of low power consumption switch power supply control System, including control chip interconnected and AC-DC power module, the output end of the AC-DC power module are also connected with Current collection circuit, the current collection circuit are used to detect the electric current of the AC-DC power module output, and are transferred to MCU Controller;The MCU controller is when the current value received is less than setting value and is kept for a period of time, to the control chip Control signal is issued, the control chip enters intermittent duty according to the control signal control AC-DC power module received.
The output end of the AC-DC power module is also connected with voltage collection circuit, and the voltage collection circuit is used to examine The voltage of the AC-DC power module output is surveyed, and is transferred to MCU controller;Enter in DC power supplier and operates intermittently shape After state, when the voltage value that the MCU controller receives is equal to rated operational voltage, then shutdown AC- is issued to control chip The control signal of DC power module, when the voltage value that the MCU controller receives is less than the minimum voltage of standby mode, then The control signal for opening AC-DC power module is issued to control chip.
The output end of the AC-DC power module also passes through DC-DC power module and is connected with MCU controller, the DC-DC Power module is constituted using buck chip, for powering for MCU controller.
Beneficial effect
Due to the adoption of the above technical solution, the utility model compared with prior art, has the following advantages that and accumulates Pole effect: the utility model feeds back to control chip by the size of current of real-time acquisition testing output end, then by control chip The working condition for controlling AC-DC power module is in AC-DC module in the state that power supply does not work and operates intermittently shape State, to achieve the purpose that low-power consumption.In addition, the utility model is by adding a detection voltage in AC-DC power module output end Module, feed back to control chip to detect the output voltage size of AC-DC power module, exporting AC-DC power module Voltage allows AC-DC power module to work lower than the minimum voltage time control coremaking sector-meeting that can be maintained in working condition, when what is reached AC-DC power module is closed again when normal working voltage, maintains entire power-supply system to locate always with the smallest power consumption to realize In standby mode.The utility model is used to buck chip as the power supply of MCU control panel, is had compared to conventional linear voltage regulator Advantage low in energy consumption also achievees the purpose that reduce Switching Power Supply stand-by power consumption from another point of view.
Detailed description of the invention
Fig. 1 is the principles of the present invention block diagram.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.It should be understood that these embodiments are merely to illustrate this Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen It please the appended claims limited range.
The embodiments of the present invention is related to a kind of low power consumption switch power control system, as shown in Figure 1, including mutual The control chip and AC-DC power module of connection, the output end of the AC-DC power module are also connected with current collection circuit, The current collection circuit is used to detect the electric current of the AC-DC power module output, and is transferred to MCU controller;The MCU Controller issues control signal when the current value received is less than setting value and is kept for a period of time, to the control chip, The control chip enters intermittent duty according to the control signal control AC-DC power module received.
The MCU control that present embodiment uses can be common 51 series monolithic, in the current value that will be received When compared with setting value, analog-to-digital conversion can be first carried out by the analog signal of current value and switchs to digital signal, then by by two numbers Subtract each other and compared according to obtained result to realize, above-mentioned D conversion method and comparative approach are that those skilled in the art are transporting Common technological means when with single-chip microcontroller, the application is not related to the improvement to wherein algorithm, therefore repeats no more.
The output end of AC-DC power module in present embodiment is also connected with voltage collection circuit, the voltage acquisition Circuit is used to detect the voltage of the AC-DC power module output, and is transferred to MCU controller;Enter in DC power supplier After intermittent duty, when the voltage value that the MCU controller receives is equal to rated operational voltage, then to control chip hair The control signal for turning off AC-DC power module out, when the voltage value that the MCU controller receives is less than the minimum of standby mode When voltage, then the control signal for opening AC-DC power module is issued to control chip.The mode that voltage compares in present embodiment Mode compared with electric current is similar, and details are not described herein.
Current collection circuit and voltage collection circuit in present embodiment are common electric current and voltage collection circuit, Wherein, current collection circuit can be realized by LM358 chip, and voltage collection circuit can be realized using DAM-8041 module.
The output end of the AC-DC power module also passes through DC-DC power module and is connected with MCU controller, the DC-DC Power module is used to power for MCU controller.Wherein, it is buck chip, this chip that the DC-DC power module, which can use, Compared to the power consumption that the tube voltage drop of conventional linear voltage regulator generates, loss power is compared very little, is reduced from another point of view The stand-by power consumption of power supply keeps this stand-by power consumption with the switching power control system of low-power consumption function smaller.
The working principle of the utility model is as follows:
The output electric current of AC-DC power module output end is acquired by a current collection circuit detection and is transferred to MCU Controller, when MCU controller discovery detect output end current size lower than operating current after a certain period of time, MCU controller meeting Control one signal of chip is fed back to, control chip judges that power supply is now in and does not have in harness standby mode accordingly.Then AC-DC power module output voltage size is detected in the voltage collection circuit of AC-DC power module output end and is transferred to MCU control Device processed, when the output voltage size that the discovery of MCU controller detects is equal to voltage rating, MCU controller control control chip AC-DC power module is turned off, after shutdown, due to the effect of output end storage capacitor and inductance, and because is now in sky Standby mode is carried, the decaying of output voltage may require that certain time, can be maintained in standby mode when output voltage decays to When minimum voltage, MCU controller control control chip provides a high level signal, and AC-DC power module is made to open work, when When the output voltage that MCU controller detects reaches the rated value of operating voltage again, the another secondary control control of MCU controller Chip provides a low level signal, closes AC-DC power module, and then output voltage can decay again, loops back and forth like this, Make AC-DC power module be in intermittent operating mode to reach reduce stand-by power consumption purpose while guarantee always in Machine state.
It is not difficult to find that the utility model feeds back to control chip by the size of current of real-time acquisition testing output end, then By the working condition of control chip controls AC-DC power module, between being in AC-DC module in the state that power supply does not work Disconnected working condition, to achieve the purpose that low-power consumption.In addition, the utility model is by adding one in AC-DC power module output end The module for detecting voltage, feeds back to control chip to detect the output voltage size of AC-DC power module, makes AC-DC power supply mould Block allows AC-DC power module to work in output voltage lower than the minimum voltage time control coremaking sector-meeting that can be maintained in working condition, AC-DC power module is closed again when the normal working voltage reached, maintains entire power supply system with the smallest power consumption to realize System is in standby always.

Claims (3)

1. a kind of low power consumption switch power control system, including control chip interconnected and AC-DC power module, feature It is, the output end of the AC-DC power module is also connected with current collection circuit, and the current collection circuit is for detecting institute The electric current of AC-DC power module output is stated, and is transferred to MCU controller;The MCU controller is less than in the current value received When setting value and holding a period of time, control signal is issued to the control chip, the control chip is according to the control received Signal control AC-DC power module enters intermittent duty.
2. low power consumption switch power control system according to claim 1, which is characterized in that the AC-DC power module Output end be also connected with voltage collection circuit, the voltage collection circuit is used to detect the AC-DC power module output Voltage, and it is transferred to MCU controller;After DC power supplier enters intermittent duty, when the MCU controller receives Voltage value be equal to rated operational voltage when, then to control chip issue shutdown AC-DC power module control signal, when described When the voltage value that MCU controller receives is less than the minimum voltage of standby mode, is then issued to control chip and open AC-DC power supply The control signal of module.
3. low power consumption switch power control system according to claim 1, which is characterized in that the AC-DC power module Output end also pass through DC-DC power module and be connected with MCU controller, the DC-DC power module is constituted using buck chip, For powering for MCU controller.
CN201920372373.XU 2019-03-22 2019-03-22 A kind of low power consumption switch power control system Active CN209516960U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920372373.XU CN209516960U (en) 2019-03-22 2019-03-22 A kind of low power consumption switch power control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920372373.XU CN209516960U (en) 2019-03-22 2019-03-22 A kind of low power consumption switch power control system

Publications (1)

Publication Number Publication Date
CN209516960U true CN209516960U (en) 2019-10-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920372373.XU Active CN209516960U (en) 2019-03-22 2019-03-22 A kind of low power consumption switch power control system

Country Status (1)

Country Link
CN (1) CN209516960U (en)

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