A power supply circuit for a display

Abstract

This utility model relates to a power supply circuit for a display, including a TYPE-C female connector and a charging protocol identification circuit. The TYPE-C female connector is connected to an external PD fast charger, and the charging protocol identification circuit is also connected to the TYPE-C female connector. Multiple power supply circuits are also connected to the TYPE-C female connector. In use, the TYPE-C female connector is connected to the external PD fast charger for power supply, and the charging protocol identification circuit is connected to the TYPE-C female connector for charging protocol identification. The multiple power supply circuits provide different voltage power supplies to the display's motherboard. A first self-resetting fuse is used for overcurrent self-resetting, a first diode is used for rectification and reverse connection protection, and a switch is used to control the operation of the multiple power supply circuits. This allows the display's motherboard to be powered by a universal PD fast charger, greatly facilitating user operation and improving versatility.

Description

Technical Field

[0001] This utility model relates to the field of display circuit technology, and more specifically, to a power supply circuit for a display. Background Technology

[0002] Most existing monitors are powered by external dedicated power adapters. These adapters are not interchangeable between different brands and are also bulky, which no longer meets people's needs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a power supply circuit for a display that supports power supply via a TYPE-C interface, addressing the aforementioned deficiencies of the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A power supply circuit for a display is constructed, including a TYPE-C female connector and a charging protocol identification circuit; wherein, the TYPE-C female connector is connected to an external PD fast charger, the charging protocol identification circuit is connected to the TYPE-C female connector, and the TYPE-C female connector is also connected to multiple power circuits, the multiple power circuits providing power supplies of different voltages to the motherboard of the display.

[0006] A first resettable fuse, a first diode, and a switch are connected in series between the TYPE-C female connector and the multiple power circuits. The first resettable fuse is used for overcurrent self-reset, the first diode is used for rectification and reverse connection protection, and the switch is used to control the operation of the multiple power circuits.

[0007] The power supply circuit of the display according to this utility model includes a plurality of GND terminals of the TYPE-C female connector that are grounded and a plurality of VBUS terminals that are connected to the first resettable fuse. The other end of the first resettable fuse is connected to the positive terminal of the first diode, the negative terminal of the first diode is connected to the switch, and the other end of the switch is connected to a plurality of power supply circuits.

[0008] The power supply circuit for the display of this utility model includes a charging protocol identification circuit comprising a fast charging power receiving chip.

[0009] The VBUS terminal of the fast charging power receiving chip is connected to a first resistor, the other end of the first resistor is connected to the positive terminal of the first diode and a second resistor, the other end of the second resistor is connected to the VDD terminal of the fast charging power receiving chip and a first capacitor, and the other end of the first capacitor is grounded.

[0010] The DP terminal of the fast charging power receiving chip is connected to the DP1 and DP2 terminals of the TYPE-C female connector, and the DM terminal is connected to the DN1 and DN2 terminals of the TYPE-C female connector; the CC1 terminal of the fast charging power receiving chip is connected to the CC1 terminal of the TYPE-C female connector, and the CC2 terminal is connected to the CC2 terminal of the TYPE-C female connector.

[0011] The CFG1 terminal of the fast charging power receiving chip is grounded, and the CFG2 and CFG3 terminals are connected to the other end of the second resistor.

[0012] The power supply circuit for the display according to this utility model includes: a power chip and a second self-resetting fuse;

[0013] The VIN terminal of the power chip is connected to the other end of the first switch, and the OUTPUT terminal is connected to the negative terminal of the second diode and the inductor. The other end of the inductor is connected to the second capacitor and the second resettable fuse. The other end of the second capacitor is grounded, and the other end of the second resettable fuse is the positive output terminal of the power circuit. The positive terminal of the second diode is grounded.

[0014] The power supply circuit for the display according to this utility model includes, wherein the plurality of power supply circuits comprises: a first power supply circuit, a second power supply circuit, and a third power supply circuit;

[0015] The first power supply circuit outputs 3.3V DC at its positive output terminal, the second power supply circuit outputs 5V DC at its positive output terminal, and the third power supply circuit outputs 12V DC at its positive output terminal.

[0016] The power supply circuit for the display described in this utility model includes a power chip of model LM2596S-3.3 in the first power supply circuit, a power chip of model LM2596S-5.0 in the second power supply circuit, and a power chip of model LM2596S-12RG in the third power supply circuit.

[0017] The power supply circuit for the display described in this utility model includes a fast-charging power receiving chip of model number CH224K.

[0018] The power supply circuit of the display according to this utility model further includes an indicator light circuit, which includes a third resistor and a light-emitting diode.

[0019] The first end of the third resistor is connected to the other end of the switch, and the second end is connected to the positive terminal of the light-emitting diode, while the negative terminal of the light-emitting diode is grounded.

[0020] The beneficial effects of this utility model are as follows: During use, the TYPE-C female connector is connected to an external PD fast charger for power supply; the charging protocol identification circuit is connected to the TYPE-C female connector for charging protocol identification; and multiple power circuits provide different voltage power supplies to the monitor's motherboard. Specifically, the first self-resetting fuse is used for overcurrent self-resetting, the first diode is used for rectification and reverse connection protection, and the switch is used to control the operation of multiple power circuits. This enables the monitor's motherboard to be powered by a universal PD fast charger, greatly facilitating user operation and improving versatility. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a circuit diagram of the TYPE-C female connector of the power supply circuit of the display according to a preferred embodiment of the present invention.

[0023] Figure 2 This is a circuit diagram of the charging protocol identification circuit of the power supply circuit of the display according to a preferred embodiment of the present invention.

[0024] Figure 3 This is a circuit diagram of the first self-resetting fuse, the first diode, and the indicator light circuit of the power supply circuit of the display according to a preferred embodiment of the present invention.

[0025] Figure 4 This is a circuit diagram of the power supply circuit of the display according to a preferred embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] The power supply circuit of the display in the preferred embodiment of this utility model is as follows: Figure 1 As shown, see also Figures 2 to 4It includes a TYPE-C female connector U16 and a charging protocol identification circuit 100; wherein, the TYPE-C female connector U16 is connected to an external PD fast charger, the charging protocol identification circuit 100 is connected to the TYPE-C female connector U16, and the TYPE-C female connector U16 is also connected to multiple power circuits 200, which provide different voltage power supplies to the motherboard of the display (not shown in the figure);

[0028] A first self-resetting fuse F1, a first diode U2, and a switch K1 are connected in series between the TYPE-C female connector U16 and multiple power circuits 200. The first self-resetting fuse F1 is used for overcurrent self-resetting, the first diode U2 is used for rectification and reverse connection protection, and the switch K1 is used to control the operation of the multiple power circuits 200.

[0029] In use, the TYPE-C female connector U16 is connected to an external PD fast charger for power supply. The charging protocol identification circuit 100 is connected to the TYPE-C female connector U16 for charging protocol identification. Multiple power supply circuits 200 provide power to the monitor's motherboard at different voltages. Among them, the first self-resetting fuse F1 is used for overcurrent self-resetting, the first diode U2 is used for rectification and reverse connection protection, and the switch K1 is used to control the operation of multiple power supply circuits 200. Thus, the monitor's motherboard can be powered by a universal PD fast charger, which greatly facilitates the user's use and improves versatility.

[0030] like Figure 1 and Figure 3 As shown, multiple GND terminals of the TYPE-C female connector U16 are grounded and multiple VBUS terminals are connected to the first self-resetting fuse F1. The other end of the first self-resetting fuse F1 is connected to the positive terminal of the first diode U2, and the negative terminal of the first diode U2 is connected to the switch K1. The other end of the switch K1 is connected to multiple power supply circuits 200; thus realizing overcurrent self-resetting protection, rectification and reverse connection protection for the PD fast charger, as well as control by the switch K1.

[0031] like Figures 1 to 3 As shown, the charging protocol identification circuit 100 includes: a fast charging power receiving chip U1;

[0032] The VBUS terminal of the fast charging power receiving chip U1 is connected to the first resistor R8. The other end of the first resistor R8 is connected to the positive terminal of the first diode U2 and the second resistor R1. The other end of the second resistor R1 is connected to the VDD terminal of the fast charging power receiving chip U1 and the first capacitor C0. The other end of the first capacitor C0 is grounded.

[0033] The DP terminal of the fast charging power receiving chip U1 is connected to the DP1 and DP2 terminals of the TYPE-C female connector U16, and the DM terminal is connected to the DN1 and DN2 terminals of the TYPE-C female connector U16; the CC1 terminal of the fast charging power receiving chip U1 is connected to the CC1 terminal of the TYPE-C female connector U16, and the CC2 terminal is connected to the CC2 terminal of the TYPE-C female connector U16.

[0034] The CFG1 terminal of the fast charging power receiving chip U1 is grounded, and the CFG2 and CFG3 terminals are connected to the other end of the second resistor R1; this satisfies the working requirements of the fast charging power receiving chip U1, which instructs the PD fast charger to output 15V DC power.

[0035] like Figure 3 and Figure 4 As shown, the power supply circuit 200 includes: a power supply chip U3 and a second self-resetting fuse F2;

[0036] The VIN terminal of power chip U3 is connected to the other end of the first switch K1, and the OUTPUT terminal is connected to the negative terminal of the second diode U5 and the inductor L2. The other end of the inductor L2 is connected to the second capacitor C4 and the second resettable fuse F2. The other end of the second capacitor C4 is grounded, and the other end of the second resettable fuse F2 is the positive output terminal of the power circuit 200. The positive terminal of the second diode U5 is grounded. Among these, power chip U3 is used for voltage reduction, the second resettable fuse F2 is used for output overcurrent self-reset protection of the power circuit 200, the second diode U5 is used for freewheeling, the inductor L2 is used for DC blocking and AC passing, and the second capacitor C4 is used for filtering.

[0037] like Figure 4 As shown, the multiple power supply circuits 200 include: a first power supply circuit 200, a second power supply circuit 200, and a third power supply circuit 200.

[0038] The positive output terminal of the first power supply circuit 200 outputs 3.3V DC, the positive output terminal of the second power supply circuit 200 outputs 5V DC, and the positive output terminal of the third power supply circuit 200 outputs 12V DC; so as to achieve the output of DC voltages of different voltages to meet the usage requirements of the monitor's motherboard.

[0039] like Figure 4 As shown, the power chip U3 of the first power circuit 200 is model LM2596S-3.3, the power chip U3 of the second power circuit 200 is model LM2596S-5.0, and the power chip U3 of the third power circuit 200 is model LM2596S-12RG; they are small in size and have an output current of up to 3A, which meets the power supply requirements of the monitor's motherboard.

[0040] like Figure 4As shown, the fast charging power receiving chip U1 is model CH224K, which supports fast charging protocols such as PD3.0 / 2.0 and BC1.2, meeting different usage needs and having wide applicability.

[0041] like Figure 3 As shown, it also includes an indicator light circuit 300, which includes: a third resistor R7 and a light-emitting diode LED5;

[0042] The first end of the third resistor R7 is connected to the other end of the switch K1, and the second end is connected to the positive terminal of the light-emitting diode LED5. The negative terminal of the light-emitting diode LED5 is grounded; this provides power input indication and improves the level of intelligence.

[0043] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A power supply circuit of a display, comprising a TYPE-C female socket and a charging protocol identification circuit; characterized in that, The TYPE-C female connector is connected to an external PD fast charger, the charging protocol identification circuit is connected to the TYPE-C female connector, and the TYPE-C female connector is also connected to multiple power circuits, which provide different voltage power supplies to the motherboard of the display. A first resettable fuse, a first diode, and a switch are connected in series between the TYPE-C female connector and the multiple power circuits. The first resettable fuse is used for overcurrent self-reset, the first diode is used for rectification and reverse connection protection, and the switch is used to control the operation of the multiple power circuits.

2. A power supply circuit for a display according to claim 1, characterised in that, The TYPE-C female connector has multiple GND terminals grounded and multiple VBUS terminals connected to the first resettable fuse. The other end of the first resettable fuse is connected to the positive terminal of the first diode. The negative terminal of the first diode is connected to the switch. The other end of the switch is connected to multiple power supply circuits.

3. A power supply circuit for a display according to claim 2, characterised in that, The charging protocol identification circuit includes: a fast charging power receiving chip; The VBUS terminal of the fast charging power receiving chip is connected to a first resistor, the other end of the first resistor is connected to the positive terminal of the first diode and a second resistor, the other end of the second resistor is connected to the VDD terminal of the fast charging power receiving chip and a first capacitor, and the other end of the first capacitor is grounded. The DP terminal of the fast charging power receiving chip is connected to the DP1 and DP2 terminals of the TYPE-C female connector, and the DM terminal is connected to the DN1 and DN2 terminals of the TYPE-C female connector; the CC1 terminal of the fast charging power receiving chip is connected to the CC1 terminal of the TYPE-C female connector, and the CC2 terminal is connected to the CC2 terminal of the TYPE-C female connector. The CFG1 terminal of the fast charging power receiving chip is grounded, and the CFG2 and CFG3 terminals are connected to the other end of the second resistor.

4. A power supply circuit for a display according to claim 3, characterised in that, The power supply circuit includes: a power chip and a second self-resetting fuse; The VIN terminal of the power chip is connected to the other end of the first switch, and the OUTPUT terminal is connected to the negative terminal of the second diode and the inductor. The other end of the inductor is connected to the second capacitor and the second resettable fuse. The other end of the second capacitor is grounded, and the other end of the second resettable fuse is the positive output terminal of the power circuit. The positive terminal of the second diode is grounded.

5. A power supply circuit for a display according to claim 4, characterised in that, The plurality of power supply circuits include: a first power supply circuit, a second power supply circuit, and a third power supply circuit; The first power supply circuit outputs 3.3V DC at its positive output terminal, the second power supply circuit outputs 5V DC at its positive output terminal, and the third power supply circuit outputs 12V DC at its positive output terminal.

6. A power supply circuit for a display according to claim 5, characterised in that, The power chip model of the first power supply circuit is LM2596S-3.3, the power chip model of the second power supply circuit is LM2596S-5.0, and the power chip model of the third power supply circuit is LM2596S-12RG.

7. The power supply circuit for the display according to claim 3, characterized in that, The fast charging power receiving chip is model CH224K.

8. The power supply circuit for the display according to claim 2, characterized in that, It also includes an indicator light circuit, which includes a third resistor and a light-emitting diode; The first end of the third resistor is connected to the other end of the switch, and the second end is connected to the positive terminal of the light-emitting diode, while the negative terminal of the light-emitting diode is grounded.

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