Power supply module circuit

Abstract

The utility model discloses a power supply module circuit, comprising an input circuit whose input end is connected with a power supply; the step-down circuit is connected with the output end of the input circuit; the step-down enabling circuit is respectively connected with the output end of the input circuit and the step-down circuit; the booster circuit is connected with the output end of the input circuit; and the boost enabling circuit is respectively connected with the output end of the input circuit and the boost circuit. According to the power supply module circuit, two paths of different voltage outputs are realized by adopting the same power supply, the requirements of various electronic devices can be met, the circuit design is simplified, the cost is reduced, and the efficiency and the reliability of the power supply module circuit are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a power supply module circuit. Background Art

[0002] Power module circuit boards are widely used in various electronic devices to provide stable and reliable power supply. However, the prior art usually uses multiple independent power modules or complex voltage conversion circuits, which not only increases the cost but also reduces the reliability and efficiency of the power module circuit boards. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a power module circuit that uses the same power supply to achieve two different voltage outputs, which can meet the needs of a variety of electronic devices, simplify circuit design, reduce costs, and improve the efficiency and reliability of the power module circuit.

[0004] The utility model provides a power module circuit, comprising:

[0005] An input circuit, an input terminal of which is connected to a power supply;

[0006] A step-down circuit connected to the output end of the input circuit;

[0007] A buck enabling circuit, connected to the output end of the input circuit and the buck circuit respectively;

[0008] A boost circuit connected to the output end of the input circuit;

[0009] The boost enabling circuit is connected to the output end of the input circuit and the boost circuit respectively.

[0010] Furthermore, the input circuit comprises:

[0011] A diode D1, whose anode is connected to the power supply;

[0012] A light emitting diode D2, connected in parallel with the diode D1;

[0013] A voltage stabilizing diode VD1, whose anode is grounded and whose cathode is connected to the cathode of the diode D1;

[0014] The polarity capacitor C8 has a cathode connected to the ground, and an anode connected to the cathode of the diode D1.

[0015] Furthermore, the step-down circuit includes:

[0016] The DCDC chip U1 has its pin 2 connected to the output end of the input circuit, and its pins 7 and 9 are grounded;

[0017] The capacitors C9, C10, C11, C12 and C13 connected in parallel have a common first end connected to pin 2 of the DCDC chip U1 and a common second end grounded;

[0018] A resistor R4, a first end of which is connected to pin 4 of the DCDC chip U1, and a second end of which is grounded;

[0019] A capacitor C1, a first end of which is connected to pin 1 of the DCDC chip U1, and a second end of which is connected to pin 8 of the DCDC chip U1;

[0020] an inductor L1, a first end of which is connected to the second end of the capacitor C1;

[0021] The capacitors C2, C3, C4, C5 and C6 connected in parallel have a common first end connected to the second end of the inductor L1 and a common second end grounded;

[0022] A resistor R1, a first end of which is connected to pin 5 of the DCDC chip U1, and a second end of which is connected to the second end of the inductor L1;

[0023] A resistor R2, a first end of which is connected to pin 6 of the DCDC chip U1;

[0024] A capacitor C16, a first end of which is connected to the second end of the resistor R2, and a second end of which is grounded;

[0025] A capacitor C15, a first end of which is connected to the first end of the resistor R2, and a second end of which is grounded;

[0026] The resistor R3 has a first end connected to the pin 5 of the DCDC chip U1 and a second end connected to the ground.

[0027] Furthermore, the voltage reduction enabling circuit includes:

[0028] a resistor R13, a first end of which is connected to the output end of the input circuit;

[0029] a resistor R14, a first end of which is connected to the second end of the resistor R13, and a second end of which is grounded;

[0030] The resistor R17 has a first end connected to the second end of the resistor R13 , and a second end connected to pin 3 of the DCDC chip U1 .

[0031] Furthermore, the boost circuit comprises:

[0032] A capacitor C18, a first end of which is connected to the output end of the input circuit, and a second end of which is grounded;

[0033] A capacitor C19 connected in parallel with the capacitor C18;

[0034] a resistor R5, a first end of which is connected to a first end of the capacitor C18;

[0035] A capacitor C20, a first end of which is connected to the second end of the resistor R5, and a second end of which is grounded;

[0036] DCDC chip U2, its pins 7 and 8 are grounded;

[0037] An inductor L2, a first end of which is connected to the first end of the capacitor C18, and a second end of which is connected to pins 6, 19, and 20 of the DCDC chip U2;

[0038] Capacitor C17, a first end of which is grounded, and a second end of which is connected to pin 17 of the DCDC chip U2;

[0039] A capacitor C21, a first end of which is connected to pin 1 of the DCDC chip U2, and a second end of which is connected to pins 6, 19, and 20 of the DCDC chip U2;

[0040] A resistor R6, a first end of which is connected to the output end of the input circuit, and a second end of which is connected to pin 13 of the DCDC chip U2;

[0041] A resistor R7, a first end of which is grounded, and a second end of which is connected to pin 13 of the DCDC chip U2;

[0042] A resistor R8, a first end of which is grounded, and a second end of which is connected to pin 12 of the DCDC chip U2;

[0043] A resistor R11, a first end of which is grounded, and a second end of which is connected to pin 11 of the DCDC chip U2;

[0044] a resistor R10, a first end of which is connected to the second end of the resistor R11;

[0045] a resistor R9, a first end of which is connected to the second end of the resistor R10;

[0046] A resistor R12, a first end of which is grounded, and a second end of which is connected to pin 9 of the DCDC chip U2;

[0047] The capacitors C22, C23, C24 and C25 connected in parallel have a common first end connected to pins 2, 3, 4 and 5 of the DCDC chip U2, and a common second end connected to the ground.

[0048] Furthermore, the boost enabling circuit includes:

[0049] a resistor R15, a first end of which is connected to the output end of the input circuit;

[0050] a resistor R16, a first end of which is connected to the second end of the resistor R15, and a second end of which is grounded;

[0051] The resistor R18 has a first end connected to the second end of the resistor R15 , and a second end connected to the pin 14 of the DCDC chip U2 .

[0052] Compared with the prior art, the beneficial effects of the utility model are:

[0053] The power module circuit of the utility model adopts the same power supply to realize two-way output of different voltages, which can meet the needs of various electronic devices, simplify the circuit design, reduce the cost, improve the efficiency and reliability of the power module circuit, adopt a variety of protection measures, and enhance the safety of the power module circuit.

[0054] It should be understood that the contents described in the utility model summary are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0056] Figure 1 is the circuit diagram of the input circuit;

[0057] Figure 2 is a circuit diagram of a step-down circuit;

[0058] Figure 3 is a circuit diagram of a buck enabling circuit;

[0059] Figure 4 is a circuit diagram of a voltage boost circuit;

[0060] Figure 5 This is the circuit diagram of the boost enable circuit. DETAILED DESCRIPTION

[0061] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0062] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0063] Please refer to Figure 1 to Figure 5 , an embodiment of the utility model provides a power module circuit, comprising:

[0064] An input circuit, an input terminal of which is connected to a power supply;

[0065] A step-down circuit connected to the output end of the input circuit;

[0066] A buck enabling circuit is connected to the output end of the input circuit and the buck circuit respectively;

[0067] a boost circuit connected to the output terminal of the input circuit; and

[0068] A boost enabling circuit is connected to the output end of the input circuit and the boost circuit respectively;

[0069] The input circuit includes:

[0070] A diode D1, whose anode is connected to the power supply;

[0071] Light emitting diode D2, connected in parallel with diode D1;

[0072] A voltage zener diode VD1, whose anode is grounded and whose cathode is connected to the cathode of the diode D1;

[0073] A polar capacitor C8, whose cathode is grounded and whose anode is connected to the cathode of the diode D1;

[0074] The step-down circuit includes:

[0075] DCDC chip U1, its pin 2 is connected to the output end of the input circuit, and its pins 7 and 9 are grounded;

[0076] The capacitors C9, C10, C11, C12 and C13 connected in parallel have a common first end connected to pin 2 of the DCDC chip U1 and a common second end connected to ground;

[0077] A resistor R4, a first end of which is connected to pin 4 of the DCDC chip U1, and a second end of which is grounded;

[0078] A capacitor C1, a first end of which is connected to pin 1 of the DCDC chip U1, and a second end of which is connected to pin 8 of the DCDC chip U1;

[0079] an inductor L1, a first end of which is connected to a second end of the capacitor C1;

[0080] The capacitors C2, C3, C4, C5 and C6 connected in parallel have a common first end connected to the second end of the inductor L1 and a common second end grounded;

[0081] A resistor R1, a first end of which is connected to pin 5 of the DCDC chip U1, and a second end of which is connected to the second end of the inductor L1;

[0082] A resistor R2, a first end of which is connected to pin 6 of the DCDC chip U1;

[0083] A capacitor C16, a first end of which is connected to the second end of the resistor R2, and a second end of which is grounded;

[0084] A capacitor C15, a first end of which is connected to the first end of the resistor R2, and a second end of which is grounded;

[0085] A resistor R3, a first end of which is connected to pin 5 of the DCDC chip U1, and a second end of which is grounded;

[0086] The buck enable circuit includes:

[0087] a resistor R13, a first end of which is connected to the output end of the input circuit;

[0088] a resistor R14, a first end of which is connected to the second end of the resistor R13, and a second end of which is grounded;

[0089] A resistor R17, a first end of which is connected to the second end of the resistor R13, and a second end of which is connected to pin 3 of the DCDC chip U1;

[0090] The boost circuit includes:

[0091] A capacitor C18, a first end of which is connected to the output end of the input circuit, and a second end of which is grounded;

[0092] Capacitor C19, connected in parallel with capacitor C18;

[0093] a resistor R5, a first end of which is connected to a first end of a capacitor C18;

[0094] A capacitor C20, a first end of which is connected to the second end of the resistor R5, and a second end of which is grounded;

[0095] DCDC chip U2, its pins 7 and 8 are grounded;

[0096] An inductor L2, a first end of which is connected to a first end of a capacitor C18, and a second end of which is connected to pins 6, 19, and 20 of a DCDC chip U2;

[0097] Capacitor C17, a first end of which is grounded, and a second end of which is connected to pin 17 of the DCDC chip U2;

[0098] Capacitor C21, a first end of which is connected to pin 1 of the DCDC chip U2, and a second end of which is connected to pins 6, 19, and 20 of the DCDC chip U2;

[0099] A resistor R6, a first end of which is connected to the output end of the input circuit, and a second end of which is connected to pin 13 of the DCDC chip U2;

[0100] A resistor R7, a first end of which is grounded, and a second end of which is connected to pin 13 of the DCDC chip U2;

[0101] A resistor R8, a first end of which is grounded, and a second end of which is connected to pin 12 of the DCDC chip U2;

[0102] A resistor R11, a first end of which is grounded, and a second end of which is connected to pin 11 of the DCDC chip U2;

[0103] a resistor R10, a first end of which is connected to a second end of the resistor R11;

[0104] a resistor R9, a first end of which is connected to a second end of the resistor R10;

[0105] A resistor R12, a first end of which is grounded, and a second end of which is connected to pin 9 of the DCDC chip U2;

[0106] The capacitors C22, C23, C24 and C25 connected in parallel have a common first end connected to pins 2, 3, 4 and 5 of the DCDC chip U2, and a common second end connected to the ground;

[0107] The boost enable circuit includes:

[0108] a resistor R15, a first end of which is connected to the output end of the input circuit;

[0109] a resistor R16, a first end of which is connected to the second end of the resistor R15, and a second end of which is grounded;

[0110] The resistor R18 has a first end connected to the second end of the resistor R15 , and a second end connected to the pin 14 of the DCDC chip U2 .

[0111] In this embodiment, the power module circuit uses the same power supply to achieve two different voltage outputs through two independently designed voltage conversion units. The power supply uses a 12V voltage, and a 10V voltage output is achieved through a buck enabling circuit and a buck circuit. An 18V voltage output is achieved through a boost enabling circuit and a boost circuit, and the input circuit has an anti-reverse connection function, which meets the needs of a variety of electronic devices. The circuit design is simplified, the cost is reduced, and the efficiency and reliability of the power module circuit are improved. The circuit structure adopts a variety of protection measures to enhance the safety of the power module circuit.

[0112] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0113] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power module circuit, characterized in that: include: An input circuit, an input terminal of which is connected to a power supply; A step-down circuit connected to the output end of the input circuit; A buck enabling circuit, connected to the output end of the input circuit and the buck circuit respectively; A boost circuit connected to the output end of the input circuit; The boost enabling circuit is connected to the output end of the input circuit and the boost circuit respectively.

2. The power module circuit according to claim 1, characterized in that: The input circuit comprises: A diode D1, whose anode is connected to the power supply; A light emitting diode D2, connected in parallel with the diode D1; A voltage stabilizing diode VD1, whose anode is grounded and whose cathode is connected to the cathode of the diode D1; The polarity capacitor C8 has a cathode connected to the ground, and an anode connected to the cathode of the diode D1.

3. The power module circuit according to claim 1, characterized in that: The step-down circuit comprises: The DCDC chip U1 has its pin 2 connected to the output end of the input circuit, and its pins 7 and 9 are grounded; The capacitors C9, C10, C11, C12 and C13 connected in parallel have a common first end connected to pin 2 of the DCDC chip U1 and a common second end grounded; A resistor R4, a first end of which is connected to pin 4 of the DCDC chip U1, and a second end of which is grounded; A capacitor C1, a first end of which is connected to pin 1 of the DCDC chip U1, and a second end of which is connected to pin 8 of the DCDC chip U1; an inductor L1, a first end of which is connected to the second end of the capacitor C1; The capacitors C2, C3, C4, C5 and C6 connected in parallel have a common first end connected to the second end of the inductor L1 and a common second end grounded; A resistor R1, a first end of which is connected to pin 5 of the DCDC chip U1, and a second end of which is connected to the second end of the inductor L1; A resistor R2, a first end of which is connected to pin 6 of the DCDC chip U1; A capacitor C16, a first end of which is connected to the second end of the resistor R2, and a second end of which is grounded; A capacitor C15, a first end of which is connected to the first end of the resistor R2, and a second end of which is grounded; The resistor R3 has a first end connected to the pin 5 of the DCDC chip U1 and a second end connected to the ground.

4. The power module circuit according to claim 3, characterized in that: The buck enabling circuit comprises: a resistor R13, a first end of which is connected to the output end of the input circuit; a resistor R14, a first end of which is connected to the second end of the resistor R13, and a second end of which is grounded; The resistor R17 has a first end connected to the second end of the resistor R13 , and a second end connected to pin 3 of the DCDC chip U1 .

5. The power module circuit according to claim 1, characterized in that: The boost circuit comprises: A capacitor C18, a first end of which is connected to the output end of the input circuit, and a second end of which is grounded; A capacitor C19 connected in parallel with the capacitor C18; a resistor R5, a first end of which is connected to a first end of the capacitor C18; A capacitor C20, a first end of which is connected to the second end of the resistor R5, and a second end of which is grounded; DCDC chip U2, its pins 7 and 8 are grounded; An inductor L2, a first end of which is connected to the first end of the capacitor C18, and a second end of which is connected to pins 6, 19, and 20 of the DCDC chip U2; Capacitor C17, a first end of which is grounded, and a second end of which is connected to pin 17 of the DCDC chip U2; A capacitor C21, a first end of which is connected to pin 1 of the DCDC chip U2, and a second end of which is connected to pins 6, 19, and 20 of the DCDC chip U2; A resistor R6, a first end of which is connected to the output end of the input circuit, and a second end of which is connected to pin 13 of the DCDC chip U2; A resistor R7, a first end of which is grounded, and a second end of which is connected to pin 13 of the DCDC chip U2; A resistor R8, a first end of which is grounded, and a second end of which is connected to pin 12 of the DCDC chip U2; A resistor R11, a first end of which is grounded, and a second end of which is connected to pin 11 of the DCDC chip U2; a resistor R10, a first end of which is connected to the second end of the resistor R11; a resistor R9, a first end of which is connected to the second end of the resistor R10; A resistor R12, a first end of which is grounded, and a second end of which is connected to pin 9 of the DCDC chip U2; The capacitors C22, C23, C24 and C25 connected in parallel have a common first end connected to pins 2, 3, 4 and 5 of the DCDC chip U2, and a common second end connected to the ground.

6. The power module circuit according to claim 5, characterized in that: The boost enabling circuit comprises: a resistor R15, a first end of which is connected to the output end of the input circuit; a resistor R16, a first end of which is connected to the second end of the resistor R15, and a second end of which is grounded; The resistor R18 has a first end connected to the second end of the resistor R15 , and a second end connected to the pin 14 of the DCDC chip U2 .

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