Output-adjustable DC-DC power supply

Abstract

The utility model relates to an adjustable power supply, and specifically relates to a DC-DC power supply with adjustable output. Comprising an adjustable voltage conversion module, and an input module, a single-chip microcomputer module, a current and voltage acquisition module and an output module which are connected with the adjustable voltage conversion module, the current and voltage acquisition module is connected with the single-chip microcomputer module and the input module, and the single-chip microcomputer module is provided with the display module. The current and voltage acquisition module acquires current and voltage information of the adjustable voltage conversion module and the input module and sends the current and voltage information to the single-chip microcomputer module, and the current and voltage information is displayed through the display module. According to the utility model, the adjustable voltage conversion module outputs multiple paths of adjustable power supplies, the current and voltage information of the adjustable voltage conversion module is acquired by the current and voltage acquisition module, the current and voltage information is processed by the single-chip microcomputer and then displayed by the display module, and wide output voltage can supply power to various low-voltage devices. And the practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to adjustable power supply, concretely relates to a DC-DC power supply of output adjustable. BACKGROUND

[0002] At present, small electric appliances used in enterprises, families and shops are more and more, such as cameras, mobile phones, MP4, MP5, electric bicycles, electric massagers and the like, and in actual use, the above small electric appliances need a plurality of different power supplies.

[0003] However, the DC-DC power supply used in the market today has single function and limited power, and is very inconvenient to use, at present, many electronic devices use direct current power supply, and the required direct current voltage is different, and the voltage grade of the storage battery cannot meet the voltage requirement of the electronic device. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the technical problem that the existing power supply cannot be applied to power supply for different types of products, and provides a DC-DC power supply of output adjustable.

[0005] To solve the above technical problem, the technical solution provided by the utility model is as follows:

[0006] A DC-DC power supply of output adjustable, comprising an adjustable voltage conversion module, and an input module, a single-chip microcomputer module, a current voltage acquisition module and an output module connected with the adjustable voltage conversion module;

[0007] The current voltage acquisition module is connected with the single-chip microcomputer module and the input module, and the single-chip microcomputer module is provided with a display module;

[0008] The current voltage acquisition module acquires the current and voltage information of the adjustable voltage conversion module and the input module, and sends the current and voltage information to the single-chip microcomputer module, which is displayed through the display module.

[0009] Further, the adjustable voltage conversion module comprises a 12V to 3.3V power supply module, a 12V to 3.3V power supply module, a 12V to 5V power supply module and a 12V to ADJ adjustable power supply module connected with the input module;

[0010] The 3.3V power supply terminal of the 12V to 3.3V power supply module, the 5V power supply terminal of the 12V to 5V power supply module and the ADJ adjustable power supply terminal of the 12V to ADJ adjustable power supply module are connected with the output module and the current voltage acquisition module;

[0011] The 3.3V power supply terminal of the 12V-to-3.3V power supply module, the enable pin of the 12V-to-3.3V power supply module, the enable pin of the 12V-to-5V power supply module, and the enable pin of the 12V-to-ADJ adjustable power supply module are connected with the single-chip microcomputer module.

[0012] Further, the output voltage range of the ADJ adjustable power supply terminal of the 12V-to-ADJ adjustable power supply module is 1-10V.

[0013] Further, the input module comprises an input circuit, a filter circuit, and a voltage induction module connected in sequence.

[0014] The 12V power supply output terminal of the voltage induction module is connected with the 12V-to-3.3V power supply module, the 12V-to-3.3V power supply module, the 12V-to-5V power supply module, the 12V-to-ADJ adjustable power supply module, and the output module.

[0015] The D+ pin and the D- pin of the voltage induction module are connected with the output module.

[0016] Further, the input circuit and the output module are both TYPE-C interface circuits.

[0017] Further, the current and voltage collection module comprises a four-channel current collection module and a four-channel voltage collection module.

[0018] The 3.3V power supply terminal, the 5V power supply terminal, the ADJ adjustable power supply terminal, and the 12V power supply output terminal are connected with the single-chip microcomputer module through the current collection module and the voltage collection module.

[0019] Further, the voltage collection module comprises a first load resistor, a second load resistor, and a first filter capacitor.

[0020] One end of the first load resistor is connected with the 3.3V power supply terminal, the 5V power supply terminal, the ADJ adjustable power supply terminal, or the 12V power supply output terminal.

[0021] The other end of the first load resistor is connected with the second load resistor, one end of the first filter capacitor, and the single-chip microcomputer module; the other ends of the second load resistor and the first filter capacitor are connected and grounded.

[0022] Further, the current collection module comprises a current sensing amplifier.

[0023] The first pin and the second pin of the current sensing amplifier are connected and grounded.

[0024] The third pin of the current sensing amplifier is connected with the 3.3V power supply terminal and one end of the second filter capacitor; the other end of the second filter capacitor is grounded.

[0025] The fourth pin and the fifth pin of the current sensing amplifier are connected in series with a third load resistor; both ends of the third load resistor are connected with a 3.3V power terminal, a 5V power terminal, an ADJ adjustable power terminal or a 12V power output terminal; the fifth pin of the current sensing amplifier is connected with a current test module interface, and the current test module interface is connected with a current test load;

[0026] The sixth pin of the current sensing amplifier is connected with a single-chip microcomputer module.

[0027] Further, a switch button is arranged between the input circuit and an external power supply.

[0028] Compared with the prior art, the utility model has the advantages of:

[0029] 1. The output adjustable DC-DC power supply can output multiple adjustable power supplies through the adjustable voltage conversion module, and can collect current and voltage information of the adjustable voltage conversion module through the current voltage collection module, display multiple voltage and current information through the display module after being processed by the single-chip microcomputer, and can supply power to multiple devices with wide output voltage, and has high practicability.

[0030] 2. The output adjustable DC-DC power supply can connect the D+ pin and the D- pin of the voltage induction module with the output module, and the external device can communicate with the voltage induction module through the output module, and can induce 12V power voltage, and the voltage induction module can also identify whether the external device supports the fast charging protocol, and display the fast charging protocol supported by the external device through the display module. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structural schematic view of the utility model embodiment;

[0032] Figure 2 It is a circuit schematic view of the 3.3V voltage collection module in the utility model embodiment;

[0033] Figure 3 It is a circuit schematic view of the 3.3V current collection module in the utility model embodiment. DETAILED DESCRIPTION

[0034] The technical solutions of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0035] As Figure 1As shown, a kind of output adjustable DC-DC power supply, including adjustable voltage conversion module, and the input module, single-chip module, current voltage acquisition module and output module connected therewith;Single-chip module is the single-chip chip of model STC8H8K64U;Current voltage acquisition module is connected with single-chip module, input module, and single-chip module is equipped with display module;Current voltage acquisition module gathers the current and voltage information of adjustable voltage conversion module, input module, and sends it to single-chip module, and it is shown by display module.

[0036] Adjustable voltage conversion module includes 12V to 3.3V power module, 12V to 3.3V power module, 12V to 5V power module and 12V to ADJ adjustable power module connected with input module;

[0037] 12V to 3.3V power module adopts the power chip of model HT7133;12V to 3.3V power module, 12V to 5V power module and 12V to ADJ adjustable power module all adopt the power chip of model MT2496;

[0038] The 3.3V power terminal of 12V to 3.3V power module, the 5V power terminal of 12V to 5V power module and the ADJ adjustable power terminal of 12V to ADJ adjustable power module are connected with output module, current voltage acquisition module;

[0039] The 3.3V power terminal of 12V to 3.3V power module, the enable pin of 12V to 3.3V power module, the enable pin of 12V to 5V power module and the enable pin of 12V to ADJ adjustable power module are connected with single-chip module.

[0040] The output voltage range of the ADJ adjustable power terminal of 12V to ADJ adjustable power module is 1-10V.

[0041] Input module includes input circuit, filter circuit and voltage induction module connected in sequence;

[0042] The 12V power output terminal of voltage induction module is connected with 12V to 3.3V power module, 12V to 3.3V power module, 12V to 5V power module, 12V to ADJ adjustable power module and output module;

[0043] The D+ pin and D- pin of voltage induction module are connected with output module;Voltage induction module adopts the voltage induction chip of model XSP16, and can support and identify PD3.0, PD3.1, PD, QC, AFC, FCP and other fast charging protocols.

[0044] The voltage induction module is connected with the single-chip microcomputer module, and is used for sending the identification result to the single-chip microcomputer module, and displaying the current fast charging protocol supported by the external device by the display module.

[0045] After the external device is connected with the output adjustable DC-DC power supply through the output module, the external device communicates with the voltage induction module through the output module, whether the external device meets the fast charging protocol is identified by the voltage induction module, if yes, the voltage induction module sends the identification result to the single-chip microcomputer module, and the current fast charging protocol is displayed by the display module.

[0046] The input circuit and the output module are both TYPE-C interface circuits,

[0047] The current and voltage collection module includes four current collection modules and four voltage collection modules; the 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal and the 12V power output terminal are connected with the single-chip microcomputer module through the current collection module and the voltage collection module.

[0048] The voltage collection module includes a first load resistor, a second load resistor and a first filter capacitor; one end of the first load resistor is connected with the 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal or the 12V power output terminal; the other end of the first load resistor is connected with the second load resistor, one end of the first filter capacitor and the single-chip microcomputer module; the other ends of the second load resistor and the first filter capacitor are connected and grounded.

[0049] Taking the 3.3V voltage collection module as an example, as shown in Figure 2 The 3.3V voltage collection module includes a first load resistor R44, a second load resistor R45 and a first filter capacitor C33; one end of the first load resistor R44 is connected with the 3.3V power terminal; the other end of the first load resistor R44 is connected with the second load resistor R45, one end of the first filter capacitor C33 and the single-chip microcomputer module; the other ends of the second load resistor R45 and the first filter capacitor C33 are connected and grounded.

[0050] The current collection module includes a current sensing amplifier; the first pin and the second pin of the current sensing amplifier are connected and grounded; the third pin of the current sensing amplifier is connected with the 3.3V power terminal and one end of the second filter capacitor, and the other end of the second filter capacitor is grounded; the third load resistor is connected in series between the fourth pin and the fifth pin of the current sensing amplifier; the two ends of the third load resistor are connected with the 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal or the 12V power output terminal; the fifth pin of the current sensing amplifier is connected with the current test module interface, and the current test module interface is connected with the current test load; the sixth pin of the current sensing amplifier is connected with the single-chip microcomputer module. The model of the current sensing amplifier is INA199.

[0051] Taking a 3.3V current acquisition module as an example, as shown in the figure, Figure 3 The 3.3V current acquisition module comprises a current sensing amplifier U6; a first pin and a second pin of the current sensing amplifier U6 are connected and grounded; a third pin of the current sensing amplifier U6 is connected with a 3.3V power supply terminal and one end of a second filter capacitor C24, and the other end of the second filter capacitor C24 is grounded; a third load resistor R1 is connected in series between a fourth pin and a fifth pin of the current sensing amplifier U6; both ends of the third load resistor R1 are connected with the 3.3V power supply terminal; a fifth pin of the current sensing amplifier U6 is connected with a current test module interface DZ1, and the current test module interface DZ1 is connected with a current test load; and a sixth pin of the current sensing amplifier U6 is connected with a single-chip microcomputer module.

[0052] In order to facilitate the control of the opening or closing of the output-adjustable DC-DC power supply, a switch button is arranged between the input circuit and the external power supply.

[0053] The output-adjustable DC-DC power supply provided by the embodiment is connected with the external power supply through the switch button in use; and the external device is connected with the output-adjustable DC-DC power supply through the output module.

[0054] The external device communicates with the voltage induction module through the output module, and induces a 12V power supply voltage, which is output from a 12V power supply output terminal.

[0055] Meanwhile, the external device selects 3.3V, 5V, 12V or 1-10V voltage power supply according to the voltage required by itself.

[0056] Whether the external device meets the fast charging protocol is identified by the voltage induction module, and if so, the current fast charging protocol is displayed by the display module.

[0057] In the use process, the current and voltage information of the 12V power supply output terminal, the 12V-to-3.3V power supply module, the 12V-to-5V power supply module or the 12V-to-ADJ adjustable power supply module are collected by the current acquisition module and the voltage acquisition module, and are sent to the single-chip microcomputer module, and are displayed by the display module.

[0058] The above merely illustrates the specific implementation of the present application, but the protection scope of the present application is not limited to this, any change or replacement within the technical range disclosed by the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An output adjustable DC-DC power supply, characterized by: The adjustable voltage conversion module is connected with an input module, a single-chip microcomputer module, a current-voltage acquisition module and an output module. The current-voltage acquisition module is connected with the single-chip microcomputer module and the input module, and the single-chip microcomputer module is provided with a display module. The current-voltage acquisition module acquires current and voltage information of the adjustable voltage conversion module and the input module, and sends the information to the single-chip microcomputer module, which displays the information through the display module.

2. The output adjustable DC-DC power supply according to claim 1, characterized in that: The adjustable voltage conversion module comprises a 12V-to-3.3V power supply module, a 12V-to-3.3V power module, a 12V-to-5V power module and a 12V-to-ADJ adjustable power module connected with the input module. The 3.3V power terminal of the 12V-to-3.3V power module, the 5V power terminal of the 12V-to-5V power module and the ADJ adjustable power terminal of the 12V-to-ADJ adjustable power module are connected with the output module and the current-voltage acquisition module. The 3.3V power terminal of the 12V-to-3.3V power supply module, the enable pin of the 12V-to-3.3V power module, the enable pin of the 12V-to-5V power module and the enable pin of the 12V-to-ADJ adjustable power module are connected with the single-chip microcomputer module.

3. The output adjustable DC-DC power supply of claim 2, wherein: The output voltage range of the ADJ adjustable power terminal of the 12V-to-ADJ adjustable power module is 1-10V.

4. The output adjustable DC-DC power supply according to any one of claims 1 or 2, characterized in that: The input module comprises an input circuit, a filter circuit and a voltage induction module connected in sequence. The 12V power output terminal of the voltage induction module is connected with the 12V-to-3.3V power supply module, the 12V-to-3.3V power module, the 12V-to-5V power module, the 12V-to-ADJ adjustable power module and the output module. The D+ pin and the D- pin of the voltage induction module are connected with the output module.

5. The output adjustable DC-DC power supply of claim 4, wherein: The input circuit and the output module are both TYPE-C interface circuits.

6. The output adjustable DC-DC power supply of claim 1, wherein: The current-voltage acquisition module comprises a four-channel current acquisition module and a four-channel voltage acquisition module. The 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal and the 12V power output terminal are connected with the single-chip microcomputer module through the current acquisition module and the voltage acquisition module.

7. The output adjustable DC-DC power supply of claim 6, wherein: The voltage acquisition module comprises a first load resistor, a second load resistor and a first filter capacitor. One end of the first load resistor is connected with the 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal or the 12V power output terminal. The other end of the first load resistor is connected with the second load resistor, one end of the first filter capacitor and the single-chip microcomputer module, and the other end of the second load resistor and the first filter capacitor is connected and grounded.

8. The output adjustable DC-DC power supply of claim 6, wherein: The current acquisition module comprises a current sensing amplifier. The first pin and the second pin of the current sensing amplifier are connected and grounded. The third pin of the current sensing amplifier is connected with the 3.3V power terminal and one end of the second filter capacitor, and the other end of the second filter capacitor is grounded. The third load resistor is connected in series between the fourth pin and the fifth pin of the current sensing amplifier, and the two ends of the third load resistor are connected with the 3.3V power terminal, the 5V power terminal, the ADJ adjustable power terminal or the 12V power output terminal. The fifth pin of the current sensing amplifier is connected with a current test module interface, and the current test module interface is connected with a current test load. The sixth pin of the current sense amplifier is connected to the single-chip microcomputer module.

9. The output adjustable DC-DC power supply of claim 4, wherein: The input circuit is provided with a switch button between the input circuit and an external power supply.

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