Low-voltage 5V Hall power supply output self-recovery circuit with current-limiting and short-circuit protection functions

Abstract

The utility model relates to the technical field of short-circuit protection self-recovery circuits, in particular to a low-voltage 5V Hall power supply output self-recovery circuit with current limiting and short-circuit protection functions, which comprises a self-hold starting output circuit, and a starting circuit for starting a PNP tube and a controlled switch PNP access circuit are arranged in the self-hold starting output circuit. The starting circuit for starting the PNP tube is connected in parallel with the controlled switch PNP access circuit, and the self-hold starting output circuit is connected in parallel with a port voltage recovery circuit; according to the low-voltage 5V Hall power supply output self-recovery circuit with the current limiting and short circuit protection functions, a starting circuit for starting a PNP tube and a controlled switch PNP access circuit are arranged in a self-hold starting output circuit, so that the current limiting output and short circuit protection functions of the circuit are realized; the effects of being simple in circuit structure, reliable in performance, small in number of components, excellent in cost and not prone to faults are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of short-circuit protection self-recovery circuits, in particular to a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit. Background Art

[0002] Currently, many BMS design companies often choose to use integrated power management integrated circuits (PMICs) when faced with diverse Hall effect sensor current parameters. However, due to the versatility and functional complexity of PMICs, PMICs often include multiple unnecessary functions, often increasing costs and wasting circuit board space and power resources. In addition, multi-purpose PMICs generally do not provide precise current limiting and short-circuit protection functions tailored for different low-voltage 5V Hall effect sensors. Therefore, the power supply circuits for different low-voltage 5V Hall effect sensors lack protection, which may increase the risk of circuit damage or failure under abnormal conditions.

[0003] For example, application number CN201220686026.2 discloses a short-circuit protection circuit based on a Hall current sensor and a digital voltage comparator. By setting a Hall current sensor, a relay and a microprocessor, a digital voltage comparator CMP, a digital-to-analog conversion module ADC and an I / O module are set in the microprocessor. The structure is simple, efficient, stable, programmable and low-cost, and has a self-recovery function; the microprocessor controls the opening of the relay and the digital voltage comparator CP to achieve delayed waiting, and detects the current signal through the Hall current sensor and converts it into a voltage signal. The microprocessor controls the digital voltage comparator CMP to generate an interrupt signal according to the voltage signal, and controls the closing of the relay and the digital voltage comparator CMP during the interruption process to achieve the short-circuit protection function. The short-circuit protection action can be completed within nanoseconds, which can effectively prevent the occurrence of equipment short-circuit accidents, but for low-voltage 5V The Hall power supply output still has the defect that the circuit may have low sensitivity to the input signal, resulting in the defect that the trigger threshold of the short-circuit protection is not accurate or unstable; Application No. CN201420597710.2 discloses a low-voltage overload intelligent protection device for a distribution transformer, which is composed of a load switch and a fuse. When a short circuit fault occurs on the low-voltage side, the fuse blows and cuts off the fault point. When the low-voltage side is overloaded, the load switch automatically disconnects the load switch by judging the collected current value, cutting off part of the load. After a period of delay, the load switch is closed to restore power supply. It takes a certain amount of time for the load to recover to the value before the load switch is disconnected. Even if the load switch refuses to operate, the fuse still serves as backup protection. However, there is a defect that no overload protection parameters are set for the low-voltage 5V Hall power supply output, making it difficult to ensure the stability of the low-voltage power supply output.

[0004] Therefore, the above two utility model patents both disclose Hall current sensors, and are based on existing integrated PMICs, which lack precise current limiting and short-circuit protection functions, as well as complex circuit structures, high costs, and waste of resources. Utility Model Content

[0005] The purpose of the utility model is to provide a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above objectives, the utility model discloses a low-voltage 5V Hall-effect power supply output with current limiting and short-circuit protection self-recovery circuit, including a self-maintaining open output circuit, wherein a start-up circuit for turning on a PNP tube and a controlled switch PNP path circuit are provided inside the self-maintaining open output circuit, and the start-up circuit for turning on the PNP tube and the controlled switch PNP path circuit are connected in parallel, the self-maintaining open output circuit is connected in parallel to a port voltage recovery circuit, and a protected enabling circuit is provided between the self-maintaining open output circuit and the port voltage recovery circuit;

[0007] The self-holding open output circuit includes a power supply voltage input terminal Power-5V, the power supply voltage input terminal Power-5V is connected in parallel with three branches to distribute current and is connected to the emitter terminal of pin 6 of the transistor Q3B, the base terminal of pin 4 of the transistor Q3B is sequentially connected in series with a resistor R45B and a capacitor C40B, and the resistor R45B is respectively connected in parallel with a resistor R57B and a resistor R67B, which are used to adjust the resistance value of the base terminal of pin 4 of the transistor Q3B, the other end of the capacitor C40B is connected to the ground wire GND, the emitter-collector terminal of pin 5 of the transistor Q3B is connected to a Hall sensor T35B, and the other end of the Hall sensor T35B is sequentially connected in series with a resistor R46B and a resistor R52B and connected to the ground wire GND;

[0008] The transistor Q3B, the resistor R45B and the capacitor C40B form a startup circuit for turning on the PNP transistor.

[0009] Optionally, the controlled switch PNP path circuit includes a MOS transistor Q4B, and a drain terminal of pin 3 of the MOS transistor Q4B is connected in series with a resistor R48B. The other end of the resistor R48B is topologically connected between the resistor R45B and the capacitor C40B, and is connected to a parallel node of the resistor R67B, the resistor R57B, and the resistor R45B. The source terminal of pin 2 of the MOS transistor Q4B is connected to the ground line GND, and the gate terminal of pin 1 of the MOS transistor Q4B is topologically connected between the resistor R46B and the resistor R52B.

[0010] Optionally, the two ends of the self-holding open output circuit are connected in parallel with the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor, the other end of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor is connected in series with a capacitor C41B and connected to the ground wire GND, and the two ends of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor where the capacitor C41B is located are connected in parallel with the port voltage recovery circuit.

[0011] Optionally, the port voltage recovery circuit includes a monitoring output terminal PTA15 HALL 5V-MSR, and resistors R44B and R50B are connected in series at both ends of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor, and the other end of the resistor R50B is connected to the ground line GND. A resistor R47B is topologically connected between the resistor R44B and the resistor R50B, and the other end of the resistor R47B is connected to the monitoring output terminal PTA15 HALL 5V-MSR. A Hall sensor T30B is connected between the resistor R47B and the monitoring output terminal PTA15 HALL 5V-MSR, and the other end of the Hall sensor T30B is connected in series with a capacitor C42B and connected to the ground line GND. The cathode end of pin 1 of the diode D11B is topologically connected between the 5V-MSRs, and the anode end of pin 2 of the diode D11B is connected to the ground line GND.

[0012] Optionally, the protected enabling circuit includes an output port PTB9HALL 5V OUT EN for controlling the power state of the Hall sensor, the output port PTB9 HALL 5VOUT EN for controlling the power state of the Hall sensor is connected in series with a resistor R55B, and the other end of the resistor R55B is topologically connected between the resistor R46B and the resistor R52B, the cathode end of pin 1 of the diode D13B is topologically connected between the resistor R55B and the output port PTB9 HALL 5V OUT EN for controlling the power state of the Hall sensor, and the anode end of pin 2 of the diode D13B is connected to the ground wire GND.

[0013] Optionally, the current from the emitter terminal of pin 6 of the transistor Q3B to the collector terminal of pin 5 is Ic, the current from the base terminal of pin 4 of the transistor Q3B to the resistor R45B is Ib, and the common emitter current amplification factor β of the transistor Q3B is 20, and the voltage between the gate terminal of pin 1 and the source terminal of pin 2 of the MOS transistor Q4B is V GS, and when V GS When the voltage is greater than 0.7V, it is used to turn on the MOS transistor Q4B so that the resistor R48B is connected to the ground line GND. After the MOS transistor Q4B is continuously turned on, the resistor R45B is used to adjust the current Ib at the base end of pin 4 of the transistor Q3B, so that the maximum current of the output channel Ic from the emitter end of pin 6 to the collector end of pin 5 of the transistor Q3B is β×IbmA.

[0014] Optionally, the resistance values ​​of the resistors R45B, R67B and R57B are equal, all are 1KΩ, the package is 0402, the power is 0.0625W, and the accuracy is 1%, and they are used to adjust the resistance of the base end of pin 4 of the transistor Q3B; the resistance values ​​of the resistor R46B and the resistor R52B are equal, both are 10KΩ, and the accuracy is 1%, and they are used for voltage division; the resistance value of the resistor R48B is 100Ω, the accuracy is 1%, and it is used for current limiting; the resistance values ​​of the resistors R44B, R50B and R47B are equal, all are 10KΩ, the package is 0402, and the accuracy is 1%, and they are used to limit current or divide voltage for the port voltage recovery circuit.

[0015] Optionally, the capacitor C40B, the capacitor C41B and the capacitor C42B have equal capacitance values ​​of 47nF, are packaged in 0402, have a withstand voltage of 50V, and are used to maintain voltage stability in the circuit; the transistor Q3B has a model of PHPT60603PY, and is used to control power switching operations; the MOS tube Q4B has a model of LN2685LT1G, and is used for amplification or switching functions; the diode D11B and the diode D13B have the same model, both LM3Z5V6T1G, and are used for current direction control or voltage stabilization.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] In this low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit, the circuit's current limiting output and short-circuit protection functions are realized by setting a startup circuit for turning on the PNP tube and a controlled switch PNP path circuit in the self-holding open output circuit, achieving the effects of simple circuit structure, reliable performance, small number of components, low cost and low malfunction. In addition, the current upper limit of the 5V voltage output is adjusted by selecting resistor components to realize the function of adjusting the output capacity of Hall sensors with different loads, achieving the ability to flexibly adjust the current according to the needs of the Hall sensor, further effectively protecting the circuit from the influence of short circuit and overload, and also supporting efficient power management and fault self-recovery function to ensure the continuous operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the structure of a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit of the utility model.

[0019] The accompanying drawings are marked as follows: 1. Self-holding open output circuit; 2. Start-up circuit for opening the PNP tube; 3. Controlled switch PNP path circuit; 4. Enable circuit with protection; 5. Port voltage recovery circuit. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is described in detail below through specific embodiments.

[0021] Reference Figure 1 As shown, the utility model discloses a low-voltage 5V Hall-effect power supply output with current limiting and short-circuit protection self-recovery circuit structure, including a self-maintaining open output circuit 1, wherein a start-up circuit 2 for turning on a PNP tube and a controlled switch PNP path circuit 3 are provided inside the self-maintaining open output circuit 1, and the start-up circuit 2 for turning on the PNP tube and the controlled switch PNP path circuit 3 are connected in parallel, the self-maintaining open output circuit 1 is connected in parallel with a port voltage recovery circuit 5, and a protective enabling circuit 4 is provided between the self-maintaining open output circuit 1 and the port voltage recovery circuit 5;

[0022] The self-holding open output circuit 1 includes a power supply voltage input terminal Power-5V, the power supply voltage input terminal Power-5V is connected to three branches in parallel to distribute current and is connected to the emitter terminal of pin 6 of the transistor Q3B, the base terminal of pin 4 of the transistor Q3B is connected in series with a resistor R45B and a capacitor C40B, and the resistor R45B is respectively connected in parallel with a resistor R57B and a resistor R67B for adjusting the resistance value of the base terminal of pin 4 of the transistor Q3B, the other end of the capacitor C40B is connected to the ground line GND, the emitter-collector terminal of pin 5 of the transistor Q3B is connected to a Hall sensor T35B, and the other end of the Hall sensor T35B is connected in series with a resistor R46B and a resistor R52B and is connected to the ground line GND;

[0023] Transistor Q3B, resistor R45B and capacitor C40B form a startup circuit 2 for turning on the PNP transistor.

[0024] Preferably, the controlled switch PNP path circuit 3 includes a MOS transistor Q4B, and the drain terminal of pin 3 of the MOS transistor Q4B is connected in series with a resistor R48B. The other end of the resistor R48B is topologically connected between the resistor R45B and the capacitor C40B, and is connected to the parallel node of the resistor R67B, the resistor R57B, and the resistor R45B. The source terminal of pin 2 of the MOS transistor Q4B is connected to the ground line GND, and the gate terminal of pin 1 of the MOS transistor Q4B is topologically connected between the resistor R46B and the resistor R52B.

[0025] Preferably, the two ends of the self-holding open output circuit 1 are connected in parallel with the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor, the other end of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor is connected in series with the capacitor C41B and connected to the ground wire GND, and the two ends of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor where the capacitor C41B is located are connected in parallel with the port voltage recovery circuit 5.

[0026] Preferably, the port voltage recovery circuit 5 includes a monitoring output terminal PTA15 HALL 5V-MSR, and resistors R44B and R50B are connected in series at both ends of the output port CNT-HALL 5V-POWER for monitoring the power status of the Hall sensor, and the other end of the resistor R50B is connected to the ground line GND. A resistor R47B is topologically connected between the resistor R44B and the resistor R50B, and the other end of the resistor R47B is connected to the monitoring output terminal PTA15HALL 5V-MSR. A Hall sensor T30B is connected between the resistor R47B and the monitoring output terminal PTA15HALL 5V-MSR, and the other end of the Hall sensor T30B is connected in series with a capacitor C42B and connected to the ground line GND. The cathode end of pin 1 of the diode D11B is topologically connected between the Hall sensor T30B and the monitoring output terminal PTA15 HALL 5V-MSR, and the anode end of pin 2 of the diode D11B is connected to the ground line GND.

[0027] Preferably, the protected enabling circuit 4 includes an output port PTB9 HALL5V OUT EN for controlling the power state of the Hall sensor, the output port PTB9 HALL 5V OUT EN for controlling the power state of the Hall sensor is connected in series with a resistor R55B, and the other end of the resistor R55B is topologically connected between the resistor R46B and the resistor R52B, the cathode end of pin 1 of the diode D13B is topologically connected between the resistor R55B and the output port PTB9 HALL 5VOUT EN for controlling the power state of the Hall sensor, and the anode end of pin 2 of the diode D13B is connected to the ground wire GND.

[0028] Preferably, the current from the emitter terminal of pin 6 of transistor Q3B to the collector terminal of pin 5 is Ic, the current from the base terminal of pin 4 of transistor Q3B to the resistor R45B is Ib, and the common emitter current amplification factor β of transistor Q3B is 20, and the voltage between the gate terminal of pin 1 and the source terminal of pin 2 of MOS tube Q4B is V GS , and when V GSWhen the voltage is greater than 0.7V, it is used to turn on the MOS tube Q4B so that the resistor R48B is connected to the ground line GND. After the MOS tube Q4B is continuously turned on, the resistor R45B is used to adjust the current Ib at the base end of pin 4 of the transistor Q3B, so that the maximum current of the output channel Ic from the emitter end of pin 6 to the collector end of pin 5 of the transistor Q3B is β×IbmA, thereby realizing the current limiting output function.

[0029] Preferably, the resistance values ​​of resistors R45B, R67B and R57B are equal, all are 1KΩ, the package is 0402, the power is 0.0625W, and the accuracy is 1%, which are used to adjust the resistance of the base end of pin 4 of transistor Q3B, thereby achieving the function of adjusting the current of Ic; the resistance values ​​of resistors R46B and R52B are equal, both are 10KΩ, and the accuracy is 1%, which are used for voltage division; the resistance value of resistor R48B is 100Ω, the accuracy is 1%, which is used for current limiting; the resistance values ​​of resistors R44B, R50B and R47B are equal, all are 10KΩ, the package is 0402, and the accuracy is 1%, which are used to limit the current or divide the voltage of the port voltage recovery circuit 5, so as to realize real-time monitoring of the output potential of the single-chip microcomputer.

[0030] Preferably, the capacitance of capacitor C40B, capacitor C41B and capacitor C42B are equal, all of which are 47nF, with a package size of 0402 and a withstand voltage of 50V, and are used to maintain voltage stability in the circuit and protect the circuit from voltage fluctuations; the model of transistor Q3B is PHPT60603PY, and is used to control the switching operation of the power; the model of MOS tube Q4B is LN2685LT1G, and is used to amplify or switch functions and enhance the control capability of the circuit; the model of diode D11B and diode D13B are the same, both of which are LM3Z5V6T1G, and are used to prevent reverse voltage and excessive voltage from damaging circuit components and ensure current direction control or voltage stability; the output port CNT-HALL 5V-POWER for monitoring the power supply status of the Hall sensor and the output port PTB9 HALL 5VOUT EN for controlling the power supply status of the Hall sensor are used to start, stop or adjust the power supply status of the Hall sensor and monitor the operating status of the Hall sensor.

[0031] Working principle: In the self-holding open output circuit 1, when the power voltage input terminal Power-5V injects a voltage, the capacitor C40B is in the power-on state, and the startup circuit 2 of the open PNP tube where the capacitor C40B is located is equivalent to a short-circuit state, so that the current quickly flows from the transistor Q3B through the resistor R45B and the capacitor C40B to the ground line GND, and an instantaneous voltage drop is generated to meet the conduction voltage drop of the transistor Q3B. Once the transistor is turned on, the Hall sensor T35B point will have a voltage drop of 4.95V to the ground. The voltage is divided by the resistor R46B and the resistor R52B to obtain a voltage of Vgs>0.7V, which is used to turn on the MOS tube Q4B. , causing resistor R48B to conduct to ground GND. In the startup circuit 2 for turning on the PNP transistor, after MOS transistor Q4B is continuously turned on, resistor R45B is used to regulate the current Ib of transistor Q3B, so that the maximum current of transistor Q3B's output channel Ic is β×IbmA. Then, when the controlled switch PNP path circuit 3 is instantaneously started, transistor Q3B is turned on, and the potential of Hall sensor T35B is now 5V. The gate potential of MOS transistor Q4B is obtained by dividing the voltage of resistors R46B and R52B to obtain a potential. MOS transistor Q4B is turned on, causing transistor Q3B to continue operating in the amplification state. If the external output is directly shorted to ground, V GS When the potential is 0V, the MOS tube Q4B cannot be turned on. The capacitor C40B is equivalent to a short circuit after being fully charged, so that the transistor Q3B cannot be turned on, so as to realize the short-circuit protection function. When the short-circuit state ends, the self-holding open output circuit 1 automatically restores the output, is connected to the microcontroller in the protection enable circuit 4, and realizes the function of the microcontroller controlling the 5V output. In the port voltage recovery circuit 5, the microcontroller is provided with real-time monitoring of the output port potential.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low voltage 5V Hall power supply output with current limiting and short circuit protection self-recovery circuit, characterized in that: The invention comprises a self-holding open output circuit (1), wherein a start-up circuit (2) for opening a PNP tube and a controlled switch PNP path circuit (3) are arranged inside the self-holding open output circuit (1), and the start-up circuit (2) for opening the PNP tube and the controlled switch PNP path circuit (3) are connected in parallel, the self-holding open output circuit (1) is connected in parallel with a port voltage recovery circuit (5), and a protection enabling circuit (4) is arranged between the self-holding open output circuit (1) and the port voltage recovery circuit (5); The self-holding open output circuit (1) comprises a power supply voltage input terminal Power-5V, the power supply voltage input terminal Power-5V is connected in parallel with three branches to distribute current and is connected to the emitter terminal of pin 6 of the transistor Q3B, the base terminal of pin 4 of the transistor Q3B is connected in series with a resistor R45B and a capacitor C40B in sequence, and the resistor R45B is respectively connected in parallel with a resistor R57B and a resistor R67B, the other end of the capacitor C40B is connected to a ground wire GND, the emitter collector terminal of pin 5 of the transistor Q3B is connected with a Hall sensor T35B, and the other end of the Hall sensor T35B is connected in series with a resistor R46B and a resistor R52B in sequence and is connected to the ground wire GND; The transistor Q3B, the resistor R45B and the capacitor C40B form a start-up circuit (2) for turning on the PNP tube.

2. According to claim 1, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The controlled switch PNP path circuit (3) comprises a MOS tube Q4B, and a drain terminal of pin No. 3 of the MOS tube Q4B is connected in series with a resistor R48B, the other end of the resistor R48B is topologically connected between the resistor R45B and the capacitor C40B, and is connected to a parallel node of the resistor R67B, the resistor R57B and the resistor R45B, the source terminal of pin No. 2 of the MOS tube Q4B is connected to the ground line GND, and the gate terminal of pin No. 1 of the MOS tube Q4B is topologically connected between the resistor R46B and the resistor R52B.

3. According to claim 2, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The two ends of the self-holding open output circuit (1) are connected in parallel with an output port CNT-HALL 5V-POWER for monitoring the power state of the Hall sensor, the other end of the output port CNT-HALL 5V-POWER for monitoring the power state of the Hall sensor is connected in series with a capacitor C41B and connected to the ground line GND, and the two ends of the output port CNT-HALL 5V-POWER for monitoring the power state of the Hall sensor where the capacitor C41B is located are connected in parallel with the port voltage recovery circuit (5).

4. According to claim 3, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The port voltage recovery circuit (5) includes a monitoring output terminal PTA15HALL 5V-MSR, two ends of the output port CNT-HALL 5V-POWER located at the monitoring Hall sensor power state are connected in series with a resistor R44B and a resistor R50B in sequence, and the other end of the resistor R50B is connected to the ground line GND, a resistor R47B is topologically connected between the resistor R44B and the resistor R50B, and the other end of the resistor R47B is connected to the monitoring output terminal PTA15 HALL 5V-MSR, a Hall sensor T30B is connected between the resistor R47B and the monitoring output terminal PTA15 HALL 5V-MSR, the other end of the Hall sensor T30B is connected in series with a capacitor C42B and connected to the ground line GND, and a capacitor C42B is connected to the Hall sensor T30B and the monitoring output terminal PTA15 HALL The cathode end of pin 1 of diode D11B is topologically connected between 5V-MSR, and the anode end of pin 2 of diode D11B is connected to the ground line GND.

5. According to claim 4, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The protected enabling circuit (4) comprises an output port PTB9 HALL 5VOUT EN for controlling the power state of the Hall sensor, wherein the output port PTB9 HALL 5V OUT EN for controlling the power state of the Hall sensor is connected in series with a resistor R55B, and the other end of the resistor R55B is topologically connected between the resistor R46B and the resistor R52B, and a cathode end of pin 1 of a diode D13B is topologically connected between the resistor R55B and the output port PTB9 HALL 5V OUT EN for controlling the power state of the Hall sensor, and an anode end of pin 2 of the diode D13B is connected to the ground wire GND.

6. A low voltage 5V Hall power supply output with current limiting and short circuit protection self-recovery circuit according to claim 5, characterized in that: The current from the emitter end of pin 6 of the transistor Q3B to the collector end of pin 5 is Ic, the current from the base end of pin 4 of the transistor Q3B to the resistor R45B is Ib, and the common emitter current amplification factor β of the transistor Q3B is 20, and the voltage between the gate end of pin 1 and the source end of pin 2 of the MOS tube Q4B is V GS .

7. According to claim 5, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The resistance values ​​of the resistors R45B, R67B and R57B are equal, all of which are 1KΩ, the package is 0402, the power is 0.0625W, and the accuracy is 1%; the resistance values ​​of the resistors R46B and R52B are equal, all of which are 10KΩ, and the accuracy is 1%; the resistance value of the resistor R48B is 100Ω, and the accuracy is 1%; the resistance values ​​of the resistors R44B, R50B and R47B are equal, all of which are 10KΩ, the package is 0402, and the accuracy is 1%.

8. According to claim 5, a low-voltage 5V Hall power supply output with current limiting and short-circuit protection self-recovery circuit is characterized in that: The capacitors C40B, C41B and C42B have the same capacitance of 47nF, are packaged in 0402, and have a withstand voltage of 50V; the transistor Q3B has a model of PHPT60603PY; the MOS tube Q4B has a model of LN2685LT1G; the diode D11B and the diode D13B have the same model, both of which are LM3Z5V6T1G.

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