A subminiature milliwatt plug-in auxiliary power supply

Abstract

The utility model discloses a subminiature milliwatt level plug -in type auxiliary power supply, including rectification filter module, modulation module and output module, rectification filter module includes rectifier bridge BD1 and filter unit, and obtains commercial power through the fuse F1 in the power acquisition end, and the commercial power is converted to the primary direct current, modulation module includes switching power supply chip IC1 and transformer T1, and the primary direct current modulation conversion is low voltage direct current, output module includes diode D8, capacitor C7 and terminal USB3, and low voltage direct current filtering output is to the power utilization equipment, and the power utilization equipment is based on low voltage direct current and carries out low -power standby. Thus, plug -in type assembly is in the commercial power acquisition end, and the rectifier bridge rectifies commercial power as direct current, and then the switching power supply chip modulation output frequency, and by transformer voltage reduction, output low voltage direct current, and low -power standby is carried out to the high -power power utilization equipment of standby state, can significantly reduce the standby power consumption of high -power power utilization equipment, prolongs the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of circuit design technology, and in particular to an ultra-small milliwatt-level plug-in auxiliary power supply. Background Technology

[0002] For high-power electrical equipment, a high-power power supply is required. However, due to limitations in component specifications and operating modes, the standby power consumption of high-power power supplies is difficult to control effectively, often exceeding 1W. For high-power electrical equipment such as audio equipment that is used less frequently, prolonged high-power standby will result in significant energy waste and affect the lifespan of the equipment. Utility Model Content

[0003] This embodiment discloses an ultra-miniature milliwatt-level plug-in auxiliary power supply, specifically including: Rectifier and filter module, modulation module and output module; The rectifier and filter module includes a rectifier bridge BD1 and a filter unit, which are used to obtain mains power through fuse F1 at the power take-off terminal and convert the mains power into primary DC power. The modulation module includes a switching power supply chip IC1 and a transformer T1, which are used to modulate and convert the primary DC current into low-voltage DC current. The output module includes a diode D8, a capacitor C7 and a USB3 terminal, which are used to filter low-voltage DC power and output it to the electrical device. The electrical equipment operates in low-power standby mode based on the low-voltage DC power.

[0004] As an optional implementation, the filtering unit includes an inductor L1 electrically connected to the third pin of the rectifier bridge BD1, and an inductor L2 electrically connected to the fourth pin of the rectifier bridge BD1. A capacitor C1 is provided between the input terminal of the inductor L1 and the input terminal of the inductor L2; A capacitor C2 is provided between the output terminals of inductor L1 and inductor L2.

[0005] As an optional implementation, a resistor R1 is provided between capacitor C1 and capacitor C2; The output terminal of the inductor L2 is grounded.

[0006] As an optional implementation, the output terminal of the inductor L1 is electrically connected to the primary coil of the transformer T1; The output terminal of the inductor L2 is electrically connected to the primary coil of the transformer T1 via the capacitor C2.

[0007] As an optional implementation, the output terminals of inductor L1 and inductor L2 are provided with two outputs; One output is connected to the second pin of the first winding of the primary coil via resistors R2, R3, and R8 and diode D2; The two outputs are connected to pin 3 of the second winding of the primary coil and pin 5 of the second winding of the primary coil via diode D1.

[0008] As an optional implementation, a capacitor C3 and a resistor R4 are connected in parallel across the two ends of the second winding of the primary coil; The resistor R3 and the resistor R8 are grounded via capacitor C4.

[0009] As an optional implementation, the output terminals of inductors L1 and L2 are connected to the first pin of the switching power supply chip IC1 via resistors R2 and R3. And, the second, third, and fourth pins of the switching power supply chip IC1 are connected via the resistor R2, the resistor R3, the resistor R8, and the diode D2; And, the 5th, 6th, 7th and 8th pins of the switching power supply chip are connected via capacitor C3, resistor R4 and diode D1; The capacitor C3 is connected in parallel with the resistor R4.

[0010] As an optional implementation, pins 5, 6, 7, and 8 of the switching power supply chip IC1 are connected to pin 5 of the second winding of the primary coil; Pins 2, 3, and 4 of the switching power supply chip IC1 are connected to pin 2 of the first winding of the primary coil.

[0011] As an optional implementation, a resistor R12 and a capacitor C5 are connected in series across the two ends of the diode D7.

[0012] As an optional implementation, a resistor R13 is connected in parallel between pins 1 and 2 of the USB3 terminal; The second pin of the USB3 terminal is grounded.

[0013] Compared with the prior art, this embodiment has the following beneficial effects: It is plug-in mounted at the mains power input end. The rectifier bridge rectifies the mains power into DC power, which is then modulated by the switching power supply chip to output frequency and stepped down by the transformer to output low-voltage DC power. This provides low-power power supply to high-power electrical equipment in standby mode, which can significantly reduce the standby power consumption of high-power electrical equipment and extend the service life of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the embodiment will be briefly introduced below. Obviously, 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.

[0015] Figure 1 This is a schematic diagram of the circuit principle of an ultra-small milliwatt-level plug-in auxiliary power supply disclosed in this embodiment. Detailed Implementation

[0016] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. 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.

[0017] Please see Figure 1 This embodiment discloses an ultra-miniature milliwatt-level plug-in auxiliary power supply, comprising: Rectifier and filter module, modulation module and output module; The rectifier and filter module includes a rectifier bridge BD1 and a filter unit, which are used to obtain mains power from the power supply terminal through fuse F1 and convert the mains power into primary DC power. The modulation module includes a switching power supply chip IC1 and a transformer T1, which are used to modulate and convert the primary DC current into low-voltage DC current. The output module includes diode D8, capacitor C7 and terminal USB3, which are used to filter low-voltage DC power and output it to the power-consuming equipment. Electrical equipment operates in low-power standby mode based on low-voltage DC power.

[0018] In this embodiment, it is plug-in mounted at the mains power input terminal. The rectifier bridge rectifies the mains power into DC power, which is then modulated by the switching power supply chip to output frequency and stepped down by the transformer to output low-voltage DC power. This provides low-power power supply to high-power electrical equipment in standby mode, which can significantly reduce the standby power consumption of high-power electrical equipment and extend the service life of the equipment.

[0019] As an optional implementation, the filter unit includes an inductor L1 electrically connected to pin 3 of the rectifier bridge BD1, and an inductor L2 electrically connected to pin 4 of the rectifier bridge BD1. A capacitor C1 is placed between the input terminals of inductor L1 and inductor L2; A capacitor C2 is placed between the output terminals of inductor L1 and inductor L2.

[0020] As an optional implementation, a resistor R1 is provided between capacitor C1 and capacitor C2; The output terminal of inductor L2 is grounded.

[0021] Here, the rectifier bridge BD1 converts the AC mains power into primary DC power, and then the filter unit rectifies and filters the primary DC power to ensure a stable and high-quality output DC power.

[0022] As an optional implementation, the output terminal of inductor L1 is electrically connected to the primary coil of transformer T1; The output terminal of inductor L2 is electrically connected to the primary coil of transformer T1 via capacitor C2.

[0023] As an optional implementation, the output terminals of inductor L1 and inductor L2 are configured with two outputs; One output is connected to the second pin of the first winding of the primary coil via resistors R2, R3, and R8 and diode D2; The two outputs are connected to pin 3 of the second winding of the primary coil and pin 5 of the second winding of the primary coil via diode D1.

[0024] As an optional implementation, a capacitor C3 and a resistor R4 are connected in parallel across the two ends of the second winding of the primary coil; Resistor R3 and resistor R8 are grounded via capacitor C4.

[0025] As an optional implementation, the output terminals of inductors L1 and L2 are connected to pin 1 of the switching power supply chip IC1 via resistors R2 and R3. And, the 2nd, 3rd, and 4th pins of the switching power supply chip IC1 are connected to the diode D2 via resistors R2, R3, and R8; And, the 5th, 6th, 7th and 8th pins of the switching power supply chip are connected via capacitor C3, resistor R4 and diode D1; In this configuration, capacitor C3 is connected in parallel with resistor R4.

[0026] As an optional implementation, pins 5, 6, 7, and 8 of the switching power supply chip IC1 are connected to pin 5 of the second winding of the primary coil; Pins 2, 3, and 4 of the switching power supply chip IC1 are connected to pin 2 of the first winding of the primary coil.

[0027] Here, the switching power supply chip IC1 modulates the frequency of the primary DC power at the front end of the transformer T1, and then the transformer T1 steps down the primary DC power of the corresponding frequency to generate low-voltage DC power to meet the power demand of high-power appliances in standby mode.

[0028] Understandably, by using different specifications of switching power supply chips or configuring the turns ratio of the transformer, the frequency and voltage of the low-voltage DC output can be accurately adjusted to suit different specifications of high-power electrical equipment.

[0029] Furthermore, its plug-in assembly method can be directly applied to the existing circuits of high-power electrical equipment without modifying the original circuit design, thus possessing strong versatility and applicability.

[0030] As an optional implementation, a resistor R12 and a capacitor C5 are connected in series across the two ends of diode D7.

[0031] As an optional implementation, a resistor R13 is connected in parallel between pins 1 and 2 of terminal USB3; Pin 2 of the USB3 terminal is grounded.

[0032] Compared with the prior art, this embodiment has the following beneficial effects: It is plug-in mounted at the mains power input end. The rectifier bridge rectifies the mains power into DC power, which is then modulated by the switching power supply chip to output frequency and stepped down by the transformer to output low-voltage DC power. This provides low-power power supply to high-power electrical equipment in standby mode, which can significantly reduce the standby power consumption of high-power electrical equipment and extend the service life of the equipment.

Claims

1. An ultra-miniature milliwatt-level plug-in auxiliary power supply, characterized in that, include: Rectifier and filter module, modulation module and output module; The rectifier and filter module includes a rectifier bridge BD1 and a filter unit, which are used to obtain mains power through fuse F1 at the power take-off terminal and convert the mains power into primary DC power. The modulation module includes a switching power supply chip IC1 and a transformer T1, which are used to modulate and convert the primary DC current into low-voltage DC current. The output module includes a diode D8, a capacitor C7 and a USB3 terminal, which are used to filter low-voltage DC power and output it to the electrical device. The electrical equipment operates in low-power standby mode based on the low-voltage DC power.

2. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 1, characterized in that, include: The filtering unit includes an inductor L1 electrically connected to the third pin of the rectifier bridge BD1, and an inductor L2 electrically connected to the fourth pin of the rectifier bridge BD1. A capacitor C1 is provided between the input terminal of the inductor L1 and the input terminal of the inductor L2; A capacitor C2 is provided between the output terminals of inductor L1 and inductor L2.

3. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 2, characterized in that, include: A resistor R1 is provided between capacitor C1 and capacitor C2; The output terminal of the inductor L2 is grounded.

4. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 2, characterized in that, include: The output terminal of the inductor L1 is electrically connected to the primary coil of the transformer T1; The output terminal of the inductor L2 is electrically connected to the primary coil of the transformer T1 via the capacitor C2.

5. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 4, characterized in that, include: The output terminals of inductor L1 and inductor L2 are provided with two outputs; One output is connected to the second pin of the first winding of the primary coil via resistors R2, R3, and R8 and diode D2; The two outputs are connected to pin 3 of the second winding of the primary coil and pin 5 of the second winding of the primary coil via diode D1.

6. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 5, characterized in that, include: A capacitor C3 and a resistor R4 are connected in parallel across the two ends of the second winding of the primary coil. The resistor R3 and the resistor R8 are grounded via capacitor C4.

7. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 4, characterized in that, include: The output terminals of inductors L1 and L2 are connected to pin 1 of the switching power supply chip IC1 via resistors R2 and R3. And, the second, third, and fourth pins of the switching power supply chip IC1 are connected via the resistor R2, the resistor R3, the resistor R8, and the diode D2; And, the 5th, 6th, 7th and 8th pins of the switching power supply chip are connected via capacitor C3, resistor R4 and diode D1; The capacitor C3 is connected in parallel with the resistor R4.

8. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 7, characterized in that, include: Pins 5, 6, 7, and 8 of the switching power supply chip IC1 are connected to pin 5 of the second winding of the primary coil. Pins 2, 3, and 4 of the switching power supply chip IC1 are connected to pin 2 of the first winding of the primary coil.

9. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 1, characterized in that, include: A resistor R12 and a capacitor C5 are connected in series across the two ends of the diode D7.

10. The ultra-miniature milliwatt-level plug-in auxiliary power supply according to claim 1, characterized in that, include: A resistor R13 is connected in parallel between pins 1 and 2 of the USB3 terminal. The second pin of the USB3 terminal is grounded.

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