Ultra-small volume high current driving power supply

Abstract

The utility model discloses a kind of ultra-small volume large current driving power supply, the driving power supply includes: input circuit, output circuit, control circuit and protection circuit;The input circuit is configured to receive 4V to 32V DC input voltage;The output circuit is configured to continuously output 8A continuous current;The control circuit includes built-in control chip and power switch tube, for realizing the adjustment of output voltage and fast response external digital modulation signal;The protection circuit includes input overvoltage protection circuit, overheat protection circuit and negative voltage enable control circuit;The driving power supply can realize the fast rise and fall of output voltage.The utility model has the beneficial effects that: it is small, light in weight, circuit is simple, can continuously output large current, with complete protection function, can realize input overvoltage, over-temperature protection and negative voltage enable control function, and the characteristics such as good protection effect.

Description

Technical Field

[0001] This utility model relates to a driving power supply circuit, specifically, to an ultra-small volume high current driving power supply. Background Technology

[0002] Currently, my country's electronic technology is developing rapidly, driven by global advancements. Domestic production is widely used, and with the diversification and miniaturization of electronic products, especially power supplies—the power supply system and core power source for these products—power technology is maturing. Power supplies are becoming increasingly modular, universal, and modularized, reducing their size while significantly improving electromagnetic compatibility and reliability. This product modularizes the internal drive section of the power supply, reducing its size while increasing the drive current and adding multiple protection circuits. It easily achieves voltage conversion, providing efficient power to various devices, a crucial application in electronic circuitry.

[0003] Drive power supplies have a wide range of applications, including electric vehicles, solar cell systems, and power supplies for electronic devices. Drive power supplies help electric vehicles convert direct current (DC) to alternating current (AC) to drive the vehicle, effectively improving its power performance and driving range. In solar cell systems, the DC power generated needs to be converted to AC by a drive power supply before it can be connected to the public power grid. Drive power supplies can provide efficient power to various devices, improving their stability and reliability, thus ensuring their effective operation. Utility Model Content

[0004] This utility model is a compact, high-current drive power supply designed to solve the aforementioned technical problems. It effectively overcomes the shortcomings of existing technologies, providing a compact, high-current drive power supply that combines a compact size, high drive current, and comprehensive protection functions, offering robust protection under high current conditions.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] An ultra-small, high-current drive power supply is disclosed, comprising: an input circuit, an output circuit, a control circuit, and a protection circuit; the input circuit is configured to receive a DC input voltage from 4V to 32V; the output circuit is configured to continuously output a continuous current of 8A; the control circuit includes a built-in control chip and a power switching transistor for regulating the output voltage and rapidly responding to external digital modulation signals; the protection circuit includes an input overvoltage protection circuit, an overheat protection circuit, and a negative voltage enable control circuit; the drive power supply is small in size and light in weight, and can achieve rapid rise and fall of the output voltage.

[0007] The ultra-small volume high current drive power supply has a volume of 10mm×10mm×10mm, adopts a through-hole installation method, has 6 pins, and has a common ground for input and output.

[0008] The ultra-small volume high current drive power supply has an enable control voltage of -5V for the negative voltage enable control circuit.

[0009] The ultra-small volume high current drive power supply has input overvoltage protection circuit and overheat protection circuit that are both non-automatic recovery type, and the temperature of the overheat protection point is +150℃.

[0010] The ultra-small volume high current drive power supply has a built-in bleed circuit, including a 0.5Ω resistor and a bleed switch, which is used to quickly reduce the output voltage when the power switch is turned off.

[0011] The ultra-small volume high current drive power supply has a control circuit including a modulation signal terminal CTRL. When the voltage at the CTRL terminal is higher than 2V, the drive power supply outputs a high-level voltage; when the voltage at the CTRL terminal is lower than 0.8V, the drive power supply outputs a low-level voltage.

[0012] The ultra-small volume high current drive power supply has a control circuit including an enable control terminal EN, which is connected through a current limiting resistor Ren. When the current flowing out of the EN terminal exceeds 6uA, the drive power supply starts working, and the maximum outflow current does not exceed 33uA.

[0013] The ultra-small, high-current drive power supply has an integrated control chip, the XC6109, used for input voltage sampling, overvoltage protection detection, and output control. The power switch is an N-channel MOSFET with an on-resistance of 18mΩ. The input circuit includes an input filter capacitor Cin with a capacitance greater than 1uF, a withstand voltage of 100V, and a 1210 package. The output circuit includes an output filter capacitor Cout with a capacitance of 470pF, a withstand voltage of 100V, and a 0603 package.

[0014] The ultra-small volume high current drive power supply mentioned above has an input overvoltage protection circuit that monitors the input voltage through a resistor voltage divider network. The resistor voltage divider network includes resistors R1 and R2. When the monitored voltage exceeds 1.2V, overvoltage protection is triggered. The resistance of resistor R1 is 100kΩ, the resistance of resistor R2 is 3.6kΩ, and the overvoltage protection point is set to 34.5V.

[0015] This utility model discloses an ultra-small, high-current drive power supply that integrates input overvoltage protection, overheat protection, and load enable control functions. The module has a wide operating voltage range, with an input voltage range of 4V-32V. It can continuously output 8A of current and can also quickly respond to external digital modulation signals, enabling rapid rise and fall of the output voltage. Furthermore, it achieves 100% domestically produced components.

[0016] The working process of this utility model is as follows: The DC input first passes through input filtering and input voltage acquisition, then reaches the module's built-in N-MOSFET. The built-in chip controls the N-MOSFET's conduction state to achieve continuous output voltage and current. It can quickly respond to external digital modulation signals, enabling rapid rise and fall of the output voltage. This drive power supply has an adjustable input overvoltage setting and provides an independent enable port, allowing external control of the enable terminal for enable control.

[0017] This utility model has the following features:

[0018] Wide input range, from 4V to 32V;

[0019] It is small in size, with overall dimensions of 10×10×10 (mm).

[0020] Lightweight, weighing less than 12g;

[0021] The built-in N-MOSFET has extremely low on-resistance: 18mΩ

[0022] Output current capability: 8A continuous current;

[0023] Negative voltage enable control voltage: -5V;

[0024] It can operate in continuous wave mode;

[0025] Built-in discharge circuit with fast falling edge

[0026] Input overvoltage protection (without automatic recovery);

[0027] Overheat protection (does not automatically recover);

[0028] It can achieve 100% domestic production;

[0029] Overheat protection point: +150℃.

[0030] The advantages of this utility model are: it is small in size, light in weight, simple in circuit, can continuously output large current, has complete protection functions, can realize input overvoltage, overtemperature protection and negative voltage enable control functions, and has good protection effect. Attached Figure Description

[0031] Figure 1 This is a functional block diagram of the present invention;

[0032] Figure 2 This is the circuit schematic diagram of this utility model;

[0033] Figure 3 This is a diagram defining the pinout of this utility model.

[0034] in Figure 3 In the diagram: 1: +VIN, positive input terminal; 2: GND, ground; 3: INH, enable control terminal; 4: CTRL, modulation signal; 5: GND, ground; 6: +VO, negative output terminal. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] like Figure 1 and 2 As shown, this utility model discloses an ultra-small, high-current driving power supply. The driving power supply includes an input circuit, an output circuit, a control circuit, and a protection circuit. The input circuit is configured to receive a DC input voltage from 4V to 32V. The output circuit is configured to continuously output a continuous current of 8A. The control circuit includes a built-in control chip and a power switching transistor for regulating the output voltage and quickly responding to external digital modulation signals. The protection circuit includes an input overvoltage protection circuit, an overheat protection circuit, and a negative voltage enable control circuit. The driving power supply is small in size and light in weight, and can achieve rapid rise and fall of the output voltage.

[0037] like Figure 3 As shown, the ultra-small volume high-current drive power supply has a volume of 10mm×10mm×10mm, adopts a through-hole mounting method, has 6 pins, and the input and output share a common ground, namely: 1: +VIN, positive input terminal; 2: GND, ground; 3: INH, enable control terminal; 4: CTRL, modulation signal; 5: GND, ground; 6: +VO, negative output terminal.

[0038] The ultra-small volume high current drive power supply has an enable control voltage of -5V for the negative voltage enable control circuit.

[0039] The ultra-small volume high current drive power supply has input overvoltage protection circuit and overheat protection circuit that are both non-automatic recovery type, and the temperature of the overheat protection point is +150℃.

[0040] The ultra-small volume high current drive power supply has a built-in bleed circuit, including a 0.5Ω resistor and a bleed switch, which is used to quickly reduce the output voltage when the power switch is turned off.

[0041] The ultra-small volume high current drive power supply has a control circuit including a modulation signal terminal CTRL. When the voltage at the CTRL terminal is higher than 2V, the drive power supply outputs a high-level voltage; when the voltage at the CTRL terminal is lower than 0.8V, the drive power supply outputs a low-level voltage.

[0042] The ultra-small volume high current drive power supply has a control circuit including an enable control terminal EN, which is connected through a current limiting resistor Ren. When the current flowing out of the EN terminal exceeds 6uA, the drive power supply starts working, and the maximum outflow current does not exceed 33uA.

[0043] The ultra-small, high-current drive power supply has an integrated control chip, the XC6109, used for input voltage sampling, overvoltage protection detection, and output control. The power switch is an N-channel MOSFET with an on-resistance of 18mΩ. The input circuit includes an input filter capacitor Cin with a capacitance greater than 1uF, a withstand voltage of 100V, and a 1210 package. The output circuit includes an output filter capacitor Cout with a capacitance of 470pF, a withstand voltage of 100V, and a 0603 package.

[0044] The ultra-small volume high current drive power supply mentioned above has an input overvoltage protection circuit that monitors the input voltage through a resistor voltage divider network. The resistor voltage divider network includes resistors R1 and R2. When the monitored voltage exceeds 1.2V, overvoltage protection is triggered. The resistance of resistor R1 is 100kΩ, the resistance of resistor R2 is 3.6kΩ, and the overvoltage protection point is set to 34.5V.

[0045] The working process of this ultra-small volume high-current drive power supply is as follows: The DC input is first filtered by the input filter capacitor Cin and then reaches the input terminal of the built-in chip XC6109. At the same time, the input sampling resistors R1 and R2 divide the voltage and transmit the collected input voltage signal to the OVP terminal of the built-in chip XC6109. The voltage detected by this pin is 1.2V. When the signal voltage is lower than 1.2V, the module output is normal. When it is higher than 1.2V, the module stops outputting. After the OVP pin detects no abnormality in the input voltage, the internal integrated circuit of the built-in chip XC6109 starts to work. At this time, the VOUT pin of XC6109 starts to output voltage. After being filtered by the output filter capacitor Cout, a reliable voltage is output, which can provide a continuous drive current of 8A.

[0046] The following is an explanation of the module's built-in parameters and the usage of each pin:

[0047] 1) Selection of input capacitor

[0048] To reduce interference from the circuit to the XC6109 chip, X7R or higher quality ceramic capacitors should be placed between VIN and GND, and the loop area formed by the capacitors and VIN / GND should be minimized. The total capacitance should ideally be greater than 1uF. The maximum input voltage is 32V. According to GJB / Z 35-93 "Component Derating Guidelines", voltage derating should ideally be selected as Class I derating to improve reliability, allow application in more demanding environments, and provide more stable performance. Since the capacitance of this ceramic capacitor changes with the DC voltage it withstands, the capacitance in the actual circuit must take into account the influence of DC bias characteristics. Therefore, the capacitor Cin (location see...) Figure 2 The circuit diagram of this utility model uses a 1210 package with a voltage rating of 100V and a capacitance of 10uF.

[0049] 2) Output capacitor selection

[0050] Since the XC6109 main control chip inside the power supply does not provide a soft-start function, it is not recommended to add a capacitor exceeding 220nF to the output VOUT. Otherwise, a large peak current will be generated at the moment of startup, which may damage the chip. According to the requirements of GJB / Z 35-93 "Component Derating Guidelines", voltage derating should preferably be selected as Class I derating. Therefore, one capacitor Cout should be selected with a 0603 package and a voltage rating of 100V and a capacitance of 470pF.

[0051] 3) Fast discharge circuit

[0052] The XC6109 main control chip inside the power supply has a built-in 0.5Ω resistor and a bleeder switch between VOUT and GND. When the main power transistor inside the chip is turned off, the output voltage will be quickly bleed through this circuit in order to reduce the output voltage quickly.

[0053] 4) Input overvoltage protection

[0054] The XC6109 internal main control chip of the driver power supply has a function pin OVP. This pin monitors the voltage divider between resistors R1 and R2 (location see...). Figure 2 When the voltage at the OVP pin exceeds 1.2V, the chip will shut down the output and lock up until VIN or EN is reset.

[0055] The calculation methods for resistors R1 and R2 are shown in Formula 1. The maximum input voltage of this drive power supply is 32V. The overvoltage protection point is set at about 34.5V. First, the resistor R1 is set to 100kΩ. The resistor R2 is calculated to be about 3.604 kΩ using Formula (1). Based on the calculated value of resistor R2, the closest resistor value is selected. Therefore, the value of resistor R2 is selected to be 3.6 kΩ.

[0056]

[0057] 5) Operating logic of the modulation signal terminal

[0058] The power supply can quickly respond to external digital modulation signals and can also output continuously. Therefore, the power supply has a CTRL pin. External modulation signals can control the output terminal VOUT to output pulse voltage through this pin, or it can continuously output a stable voltage. Through external modulation signals, the power supply can quickly achieve rapid rise and fall of the output voltage according to an external clock signal, or it can continuously output a stable voltage, with a maximum continuous output current of up to 8A. When the CTRL pin voltage is higher than 2V, a "high" modulation voltage can be achieved, allowing the power supply to output a stable high voltage; when the CTRL pin voltage is lower than 0.8V, a "low" modulation voltage can be achieved, allowing the power supply to output a stable low voltage. The modulation voltage parameters of the power supply's CTRL pin are shown in Table 1.

[0059]

[0060] 6) Enable the working logic of the control terminal

[0061] To prevent noise interference, the XC6109 inside the driver power supply controls chip enable by monitoring the current flowing out of the EN pin. The chip starts operating when the current flowing out of the EN pin exceeds 6uA. The chip manufacturer recommends that the maximum current flowing out of the EN pin should not exceed 33uA. To limit the maximum current, a current-limiting resistor Ren must be added to the EN pin (location see...). Figure 2 ).

[0062] This utility model is not limited to the above-described preferred embodiments. Any other products that are the same as or similar to this utility model and derived by anyone under the guidance of this utility model shall fall within the protection scope of this utility model.

Claims

1. A small-volume, high-current drive power supply, characterized in that: The driving power supply includes an input circuit, an output circuit, a control circuit, and a protection circuit. The input circuit is configured to receive a DC input voltage from 4V to 32V. The output circuit is configured to continuously output a continuous current of 8A. The control circuit includes a built-in control chip and a power switching transistor for regulating the output voltage and quickly responding to external digital modulation signals. The protection circuit includes an input overvoltage protection circuit, an overheat protection circuit, and a negative voltage enable control circuit. The driving power supply can achieve rapid rise and fall of the output voltage.

2. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The drive power supply has a size of 10mm×10mm×10mm, adopts a through-hole installation method, has 6 pins, and has a common ground for input and output.

3. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The enable control voltage of the negative voltage enable control circuit is -5V.

4. The ultra-small volume high current drive power supply according to claim 1, characterized in that: Both the input overvoltage protection circuit and the overheat protection circuit are non-automatic recovery type, and the temperature of the overheat protection point is +150℃.

5. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The drive power supply has a built-in bleed circuit, including a 0.5Ω resistor and a bleed switch, which is used to quickly reduce the output voltage when the power switch is turned off.

6. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The control circuit includes a modulation signal terminal CTRL. When the voltage of the modulation signal terminal CTRL is higher than 2V, the drive power supply outputs a high-level voltage; when the voltage of the modulation signal terminal CTRL is lower than 0.8V, the drive power supply outputs a low-level voltage.

7. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The control circuit includes an enable control terminal EN, which is connected through a current-limiting resistor Ren. When the current flowing out of the enable control terminal EN exceeds 6uA, the drive power supply starts working, and the maximum current flowing out does not exceed 33uA.

8. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The built-in control chip is an XC6109, used for input voltage sampling, overvoltage protection judgment, and output control; the power switch is an N-channel MOSFET with an on-resistance of 18mΩ; the input circuit includes an input filter capacitor Cin with a capacitance greater than 1uF, a withstand voltage of 100V, and a 1210 package; the output circuit includes an output filter capacitor Cout with a capacitance of 470pF, a withstand voltage of 100V, and a 0603 package.

9. The ultra-small volume high current drive power supply according to claim 1, characterized in that: The input overvoltage protection circuit monitors the input voltage through a resistor divider network, which includes resistors R1 and R2. When the monitored voltage exceeds 1.2V, overvoltage protection is triggered. The resistance of resistor R1 is 100kΩ, the resistance of resistor R2 is 3.6kΩ, and the overvoltage protection point is set to 34.5V.

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