12-3.6 V power supply controllable conversion circuit module

Abstract

The utility model discloses a 12-3.6 V power supply controllable conversion circuit module, which comprises a power supply conversion chip U1 of which the input end is connected with a 12V power supply; the grid electrode G of the field effect transistor T1 is connected with the output end of the logic control chip U2A, and the drain electrode D of the field effect transistor T1 is connected with the input end of the power supply conversion chip U1; according to the utility model, dynamic power supply management is adopted; integrated control of power supply on-off and voltage conversion is realized through a single control signal / SD; the low-power-consumption design is that power is supplied only when the load works, and the static power consumption approaches zero; and the structure is simplified: a double-triode and field-effect tube driving scheme is adopted, and the number of peripheral devices is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power management structure technology, specifically to a 12-3.6V power controllable conversion circuit module. Background Technology

[0002] A power source is a device that converts other forms of energy into electrical energy and provides power to circuits (electronic devices). Power sources operate on the principle of "magnetism generating electricity" and are derived from renewable energy sources such as hydropower, wind power, tidal power, water pressure differences in dams, and solar energy, as well as from sources that generate electricity by burning coal and oil residue. Common power sources are dry cell batteries (direct current) and household 110V-220V AC power supplies.

[0003] Existing power conversion circuits have the following defects:

[0004] 1. Unable to dynamically control power supply according to load demand, continuously consuming standby power;

[0005] 2. The control logic is complex, the integration is low, and it is difficult to adapt to multi-voltage scenarios;

[0006] Therefore, there is an urgent need for a 12-3.6V power controllable conversion circuit module to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a 12-3.6V power controllable conversion circuit module to address the aforementioned shortcomings in the prior art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A 12-3.6V power controllable conversion circuit module, comprising:

[0010] The power conversion chip U1 has its input terminal connected to a 12V power supply.

[0011] The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip U2A, and the drain D is connected to the input terminal of the power conversion chip U1.

[0012] Transistors T2 and T3, where:

[0013] The base B of T3 is connected to the control signal / SD through resistor R1;

[0014] The base B of T2 is connected to the collector C of T3 through resistor R4;

[0015] The collector C of T2 is connected to the enable terminal of the logic control chip U2A;

[0016] The logic control chip U2A has its output terminal connected to the gate G of the field-effect transistor T1 through resistor R4;

[0017] The control signal / SD is a high-low level switching signal used to control the conduction or cutoff of the field-effect transistor T1, thereby controlling the input on / off of the power conversion chip U1.

[0018] When the control signal / SD is low, T3 and T2 are turned on in sequence, triggering U2A to enable, T1 is turned on, and the 12V power supply is connected to U1 and outputs 3.6V; when the control signal / SD is high, T3, T2, and T1 are all turned off, and U1 is powered off and stops outputting.

[0019] Preferably, transistor T3 is an NPN type and transistor T2 is a P-channel MOSFET.

[0020] Preferably, the logic control chip U2A is an inverter chip, and its input terminal is also connected to VCC through a pull-up resistor R1.

[0021] Preferably, the field-effect transistor T1 is a P-channel field-effect transistor with its source S grounded.

[0022] Preferably, when the control signal / SD is low, the output of the logic control chip U2A is high, enabling T1 to conduct.

[0023] Preferably, the power conversion chip U1 is a step-down DC-DC converter chip.

[0024] Preferably, it also includes a diode D1, whose anode is connected to the drain D of the field-effect transistor T1 and whose cathode is grounded to prevent reverse current.

[0025] Preferably, the resistance of resistor R3 is 10kΩ and the resistance of resistor R2 is 5kΩ.

[0026] Preferably, the control signal / SD is triggered by an external microcontroller or sensor.

[0027] Preferably, when the 3.6V power module is working, the control signal / SD remains at a low level to maintain power supply; when the module is not working, the control signal / SD jumps to a high level to cut off the power supply.

[0028] In the above technical solution, the 12-3.6V power controllable conversion circuit module provided by this utility model has the following effects: (1) By controlling the high and low levels of / SD, the 12V power supply and U1-1 are controlled to switch on and off, realizing the power supply switching and voltage conversion of the 3.6V power module. When the 12V power supply motherboard supplies power to its 3.6V power module, in addition to completing the 12V-3.6V power conversion function, in order to save energy and achieve low power consumption, the power module also needs to have a control function, controlling that it only supplies power to the 3.6V module when it is working. (2) Utilize dynamic power management: realize the integrated control of power switching and voltage conversion through a single control signal / SD; Low power consumption design: only supply power when the load is working, and the static power consumption is close to zero; Simplified structure: adopt a dual transistor + field effect transistor driving scheme to reduce the number of peripheral devices. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 The circuit diagram provided is for an embodiment of a 12-3.6V power controllable conversion circuit module of this utility model. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, this utility model embodiment provides a 12-3.6V power controllable conversion circuit module, comprising:

[0033] The power conversion chip U1 has its input terminal connected to a 12V power supply.

[0034] The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip U2A, and the drain D is connected to the input terminal of the power conversion chip U1.

[0035] Transistors T2 and T3, where:

[0036] The base B of T3 is connected to the control signal / SD through resistor R1;

[0037] The base B of T2 is connected to the collector C of T3 through resistor R4;

[0038] The collector C of T2 is connected to the enable terminal of the logic control chip U2A;

[0039] The logic control chip U2A has its output terminal connected to the gate G of the field-effect transistor T1 through resistor R4;

[0040] The control signal / SD is a high-low level switching signal used to control the conduction or cutoff of the field-effect transistor T1, thereby controlling the input on / off of the power conversion chip U1;

[0041] When the control signal / SD is low, T3 and T2 are turned on in sequence, triggering U2A to enable, T1 is turned on, and the 12V power supply is connected to U1 and outputs 3.6V; when the control signal / SD is high, T3, T2, and T1 are all turned off, and U1 is powered off and stops outputting.

[0042] Preferably, transistor T3 is NPN type and transistor T2 is PNP type.

[0043] Preferably, the logic control chip U2A is an inverter chip, and its input terminal is also connected to VCC through a pull-up resistor R10.

[0044] Preferably, the field-effect transistor T1 is a P-channel field-effect transistor with its source S grounded.

[0045] Preferably, when the control signal / SD is low, the output of the logic control chip U2A is high, enabling T1 to conduct.

[0046] Preferably, the power conversion chip U1 is a step-down DC-DC converter chip.

[0047] Preferably, it also includes a diode D1, whose anode is connected to the drain D of the field-effect transistor T1 and whose cathode is grounded to prevent reverse current.

[0048] Preferably, the resistance of resistor R3 is 10kΩ and the resistance of resistor R2 is 5kΩ.

[0049] Preferably, the control signal / SD is triggered by an external microcontroller or sensor.

[0050] Preferably, when the 3.6V power module is working, the control signal / SD remains at a low level to maintain power supply; when the module is not working, the control signal / SD jumps to a high level to cut off the power supply.

[0051] Example 1

[0052] A 12-3.6V power controllable conversion circuit module, circuit connection 1:

[0053] The base of T3 is connected to the / SD signal via R3, and the collector is connected to the base of T2.

[0054] The collector of T2 is connected to the enable terminal of U2A, and the emitter is grounded.

[0055] The output terminal of U2A drives the gate of T1 via R4;

[0056] The drain of T1 is connected to the input terminal of U1, and the source is grounded.

[0057] Example 2

[0058] This embodiment further defines the features of Embodiment 1. The workflow is as follows:

[0059] When / SD=0, T3 turns on → T2 turns on → U2A is enabled → T1 turns on → U1 starts outputting 3.6V;

[0060] When / SD=1, T3 is cut off → T2 is cut off → U2A is disabled → T1 is cut off → U1 is de-energized.

[0061] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A 12-3.6V power controllable conversion circuit module, characterized in that, include: The power conversion chip U1 has its input terminal connected to a 12V power supply. The gate G of the field-effect transistor T1 is connected to the output terminal of the logic control chip U2A, and the drain D is connected to the input terminal of the power conversion chip U1. Transistors T2 and T3, where: The base B of T3 is connected to the control signal / SD through resistor R1; The base B of T2 is connected to the collector C of T3 through resistor R4; The collector C of T2 is connected to the enable terminal of the logic control chip U2A; The logic control chip U2A has its output terminal connected to the gate G of the field-effect transistor T1 through resistor R9; The control signal / SD is a high-low level switching signal used to control the conduction or cutoff of the field-effect transistor T1, thereby controlling the input on / off of the power conversion chip U1. When the control signal / SD is low, T3 and T2 are turned on in sequence, triggering U2A to enable, T1 is turned on, and the 12V power supply is connected to U1 and outputs 3.6V; when the control signal / SD is high, T3, T2, and T1 are all turned off, and U1 is powered off and stops outputting.

2. The 12-3.6V power controllable conversion circuit module according to claim 1, characterized in that, Transistor T3 is an NPN type, and transistor T2 is a PNP type.

3. The 12-3.6V power controllable conversion circuit module according to claim 2, characterized in that, The logic control chip U2A is an inverter chip, and its input terminal is also connected to VCC through a pull-up resistor R10.

4. The 12-3.6V power controllable conversion circuit module according to claim 3, characterized in that, The field-effect transistor T1 is a P-channel field-effect transistor with its source S grounded.

5. The 12-3.6V power controllable conversion circuit module according to claim 1, characterized in that, When the control signal / SD is low, the output of the logic control chip U2A is high, enabling T1 to conduct.

6. The 12-3.6V power controllable conversion circuit module according to claim 1, characterized in that, The power conversion chip U1 is a step-down DC-DC converter chip.

7. A 12-3.6V power controllable conversion circuit module according to claim 5, characterized in that, It also includes diode D1, whose anode is connected to the drain D of field-effect transistor T1 and whose cathode is grounded to prevent reverse current.

8. A 12-3.6V power controllable conversion circuit module according to claim 7, characterized in that, The resistance of resistor R3 is 10kΩ, and the resistance of resistor R2 is 5kΩ.

9. A 12-3.6V power controllable conversion circuit module according to claim 8, characterized in that, The control signal / SD is triggered by an external microcontroller or sensor.

10. A 12-3.6V power controllable conversion circuit module according to claim 1, characterized in that, When the 3.6V power module is working, the control signal / SD remains low to maintain power supply; when the module is not working, the control signal / SD jumps to high to cut off the power supply.

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