Wide-range AC voltage input multipath output auxiliary power supply
Through the combination of rectifier module, filter module and multi-stage buck module, the problem that traditional power supplies are difficult to adapt to wide input voltage and multiple output is solved, and stable multiple output and independent voltage is achieved, reducing costs and simplifying the control circuit.
Patent Information
- Application Number
- CN202422551382.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-22
AI Technical Summary
Traditional power supply solutions are difficult to adapt to the needs of wide input voltage ranges and multiple output voltages, and require multiple power supply equipment, which cannot meet the changing power environment and equipment needs.
The combination of rectifier module, front and rear filter module and multi-stage buck module is adopted to achieve voltage stabilization through bridge rectifier circuit and coil capacitance filter circuit, and step-by-step buck is carried out with DCDC transformer chip to output multiple independent voltages.
The stability and independence of multiple output voltages under a wide range of AC voltage inputs is achieved, reducing costs and simplifying the control circuit, adapting to variable power environments and equipment needs.
Smart Images
Figure CN223261441U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of auxiliary power supplies, in particular to an auxiliary power supply with a wide range of AC voltage input and multiple outputs. Background Art
[0002] In today's rapidly evolving electronics landscape, the demand for power management is growing, particularly in applications requiring a wide input voltage range and multiple output voltages. Traditional power supply solutions are often limited to outputting a single rated voltage. When multiple voltage outputs are required, multiple different power supplies are required, making it difficult to adapt to changing power environments and diverse device requirements. Utility Model Content
[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide an auxiliary power supply with multiple outputs and a wide range of AC voltage input, which can effectively solve the problems in the background technology.
[0004] In order to achieve the above-mentioned purpose, the utility model discloses an auxiliary power supply with multiple outputs and a wide range of AC voltage input. The technical solution adopted is as follows: it includes a rectifier module, the rear end of the rectifier module is connected to the front-end filter module and then connected to the step-down module, the step-down module includes a first step-down module and a second step-down module, the first step-down module and the second step-down module are connected in series and then connected to the rear end of the front-end filter module, the rear end of the second step-down module is connected in parallel to a third step-down module and a fourth step-down module, the first step-down module and the second step-down module are both connected in parallel with output lines, the output lines of the first step-down module and the second step-down module and the rear ends of the third step-down module and the fourth step-down module are all connected to the rear-end filter module, and the rear end of the rear-end filter module has four groups of voltage output ports, which are convenient for multi-channel output and the use of different voltages in multiple circuits.
[0005] As an optimal technical solution of the present utility model, the front end of the rectifier module is connected to a 30-100V AC power supply; the first step-down module is a 12V output step-down module, the second step-down module is a +5V output step-down module, the third step-down module is a 3.3V output step-down module, and the fourth step-down module is a -5V output step-down module.
[0006] As a preferred technical solution of the present invention, the rectifier module is a bridge rectifier circuit.
[0007] Assuming that A1, A2, A3, and A4 are the four switching tubes on the rectifier module, when the power supply voltage is in a positive cycle, A1 and A2 apply a forward voltage, A1 and A2 are turned on, A3 and A4 apply a reverse voltage, A3 and A4 are turned off, and the power supply, A1, A2, and the load resistor together form a closed loop, and the voltage of the load resistor is positive at the top and negative at the bottom; when the power supply voltage is in a negative cycle, A2 and A4 apply a forward voltage, A2 and A4 are turned on, A1 and A3 apply a reverse voltage, A1 and A3 are turned off, and the power supply, A2, A4, and the load resistor together form a closed loop, and the voltage of the load resistor is also positive at the top and negative at the bottom. At this point, the rectification is completed.
[0008] As a preferred technical solution of the present invention, the back-end filter module is a filter circuit composed of a coil and a capacitor in parallel, and a resistor is also connected in parallel to the ground at the voltage output end. The filter module can make the voltage output more stable.
[0009] As a preferred technical solution of the present invention, the first step-down module, the second step-down module, the third step-down module, and the fourth step-down module have the same step-down circuit.
[0010] As an optimal technical solution of the present utility model, the step-down circuit of the first step-down module includes a DCDC transformer chip, whose VIN port is connected to the voltage input circuit, the voltage input circuit is connected in parallel with a capacitor C1, and the capacitor C1 is grounded; the BOOT port is connected to the SW port, the connection circuit has a capacitor C2, the EN port is grounded, the RT / CLK port is connected to the resistor R1 and then grounded, the EP port is connected in parallel with the ground circuit and the diode D5, the rear end of the diode D5 is connected to the BOOT port and the SW port connection circuit, the SW port is also connected in parallel with a coil L1, the rear end of the coil L1 is connected to the 12V output line, the GND port is grounded, the COMP port is connected in series with a resistor R2 and a polarity capacitor C3, and then connected to the 12V output line, and the FB port is connected to the resistor R3 and then connected to the 12V output line.
[0011] As a preferred technical solution of the present invention, the 12V output line is also connected in parallel to the DCDC transformer chip VIN port of the second step-down module, and the +5V output line of the second step-down module is connected in parallel to the DCDC transformer chip VIN ports of the third step-down module and the fourth step-down module.
[0012] Compared with the existing technology, the present invention has the following advantages: by providing four sets of transformer modules, the voltage is gradually stepped down, and each transformer module is connected to a voltage output line, thereby enabling output of different voltages. Furthermore, the output ports are independent, and the occupation of one high-voltage output port does not affect the subsequent voltage reduction. Therefore, the output units of different voltages can operate independently, making it more convenient to use. Furthermore, the rectifier module adopts an uncontrolled rectification method, and the addition of a filter module at its output end makes the output voltage more stable and accurate. The currently widely used PWM modulation method is abandoned, and the control circuit is omitted. Instead, the purpose is achieved entirely through hardware, making it lower cost and simpler. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the utility model;
[0014] Figure 2 This is a schematic diagram of the unit module of the utility model;
[0015] Figure 3 This is the circuit principle diagram of the step-down module of this utility model.
[0016] In the figure: 1. AC power supply; 2. rectifier module; 3. front-end filter module; 4. first step-down module; 5. second step-down module; 6. third step-down module; 7. fourth step-down module; 8. back-end filter module; 801. first filter module; 802. second filter module; 803. third filter module; 804. fourth filter module. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1
[0018] like Figures 1 to 3 As shown, the utility model discloses an auxiliary power supply with a wide range of AC voltage input and multiple outputs. The technical solution adopted is, including a rectifier module 2, the rectifier module 2 is a bridge rectifier circuit, the front end of the rectifier module 2 is connected to a 30-100V AC power supply 1, the rear end of the rectifier module 2 is connected to a front-end filter module 3, the rectifier module 2 and the front-end filter module 3 together constitute a bridge rectifier capacitor filter parallel type voltage stabilizing circuit, the rear end of the front-end filter module 3 is connected to a step-down module and then connected to a rear-end filter module 8, the front-end filter module 3 and the rear-end filter module 8 both use a filter circuit in which a coil and a capacitor are connected in parallel, such as Figure 2As shown, the front-end filter module 3 includes a coil L5 and a capacitor C13 connected in parallel with the coil L5, the back-end filter module 8 includes a coil L6 and a capacitor C14 connected in parallel with the coil L2, and the back-end of the back-end filter module 8 is connected to a DC output circuit, and the DC output circuit is connected in parallel with a resistor R13, which is grounded.
[0019] The buck module uses a topology buck circuit, such as Figure 3 As shown, after the 30-100V AC power supply 1 is connected to the full-bridge rectifier circuit, it is connected to the VIN port (2# port) of the DCDC transformer chip of the first step-down module 4. The front end of the VIN port is connected in parallel to the grounding capacitor C1. The BOOT port (1# port), SW port (8# port) and EP port (9# port) of the DCDC transformer chip are connected to the bootstrap circuit. The two ends of the bootstrap capacitor C2 are connected to the BOOT port and the SW port respectively. The EP port (9#) is connected to the Zener diode D5. The Zener diode D5 is connected to the back-end circuit of the bootstrap capacitor C2. The Zener diode The front end of tube D5 is connected to the ground circuit in parallel, the SW port is also connected to the coil L3 of the bootstrap circuit, the circuit of coil L3 and bootstrap capacitor C2 is connected in parallel, the back end of coil L3 is connected to the 12V DC output circuit, the EN port (3# port) of the DCDC transformer chip is grounded, the RT / CLK port (4# port) is connected to resistor R1 and then grounded, the GND port (7# port) is grounded, the COMP port (6# port) is connected in series with resistor R2 and polarity capacitor C3 and then connected to the 12V DC output circuit, and the FB port (5# port) is connected to resistor R3 and then connected to the 12V DC output circuit.
[0020] The 12V DC output circuit has two parallel output ports: one for outputting 12V DC power, and the other connected to the VIN port of the DCDC converter chip of the second step-down module 5. The step-down circuits of the second step-down module 5, the third step-down module 6, and the fourth step-down module 7 are identical to those of the first step-down module 4. The DC output circuit of the second step-down module 5 is a +5V DC output circuit, connected to two output ports: one for outputting +5V DC power, and the other connected in parallel to the VIN ports of the DCDC converter chips of the third step-down module 6 and the fourth step-down module 7. The DC output circuit of the third step-down module 6 is a 3.3V DC output circuit, and the DC output circuit of the fourth step-down module 7 is a -5V DC output circuit.
[0021] The connection method involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to common knowledge.
[0022] Components not described in detail herein are prior art.
[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An auxiliary power supply with multiple outputs and a wide range of AC voltage input, comprising a rectifier module (2), wherein the rear end of the rectifier module (2) is connected to a front end filter module (3) and then to a step-down module, characterized in that: The step-down module comprises a first step-down module (4) and a second step-down module (5). The first step-down module (4) and the second step-down module (5) are connected in series and connected to the rear end of the front-end filter module (3). The rear end of the second step-down module (5) is connected in parallel with a third step-down module (6) and a fourth step-down module (7). The first step-down module (4) and the second step-down module (5) are both connected in parallel with output lines. The output lines of the first step-down module (4) and the second step-down module (5) and the rear ends of the third step-down module (6) and the fourth step-down module (7) are all connected to a rear-end filter module (8). The rear end of the rear-end filter module (8) has four groups of voltage output ports.
2. The auxiliary power supply with multiple outputs and wide-range AC voltage input according to claim 1, characterized in that: The front end of the rectifier module (2) is connected to a 30-100V AC power supply (1); the first step-down module (4) is a 12V output step-down module, the second step-down module (5) is a +5V output step-down module, the third step-down module (6) is a 3.3V output step-down module, and the fourth step-down module (7) is a -5V output step-down module.
3. The auxiliary power supply with multiple outputs and a wide range of AC voltage input according to claim 1 or 2, characterized in that: The rectifier module (2) is a bridge rectifier circuit.
4. The auxiliary power supply with multiple outputs and a wide range of AC voltage input according to claim 3, characterized in that: The back-end filter module (8) is a filter circuit composed of a coil and a capacitor connected in parallel, and a resistor is also connected in parallel to the ground at the voltage output end.
5. The auxiliary power supply with multiple outputs and wide-range AC voltage input according to claim 2, characterized in that: The first step-down module (4), the second step-down module (5), the third step-down module (6), and the fourth step-down module (7) have the same step-down circuits.
6. The auxiliary power supply with multiple outputs and a wide range of AC voltage input according to claim 5, characterized in that: The step-down circuit of the first step-down module (4) includes a DCDC transformer chip, a VIN port of which is connected to a voltage input circuit, a capacitor C1 is connected in parallel to the voltage input circuit, and the capacitor C1 is grounded; a BOOT port is connected to a SW port, a capacitor C2 is connected to the connection circuit, an EN port is grounded, an RT / CLK port is connected to a resistor R1 and then to ground, an EP port is connected in parallel to a ground circuit and a diode D5, a rear end of the diode D5 is connected to the BOOT port and the SW port connection circuit, a coil L1 is also connected in parallel to the SW port, a rear end of the coil L1 is connected to a 12V output line, a GND port is grounded, a COMP port is connected in series with a resistor R2 and a polarity capacitor C3, and then connected to the 12V output line, and an FB port is connected to the resistor R3 and then to the 12V output line.
7. The auxiliary power supply with multiple outputs and a wide range of AC voltage input according to claim 6, characterized in that: The 12V output line is also connected in parallel to the VIN port of the DCDC voltage conversion chip of the second step-down module (5), and the +5V output line of the second step-down module (5) is connected in parallel to the VIN ports of the DCDC voltage conversion chips of the third step-down module (6) and the fourth step-down module (7).