TWM544730U - Power source device with protection mechanism - Google Patents

Description

Power supply device with protection mechanism

The present invention relates to a power supply device, and more particularly to a power supply device having a protection mechanism.

Generally, devices such as motors or servos (including their control and drive circuits) need to be connected to a high-power power supply unit in order to obtain the power supply provided by the power supply unit for normal operation. However, the input terminals of devices such as motors or servos often have a voltage stabilizing line (usually composed of a large capacitor) to provide a voltage regulation function when the load changes. When the main power switch of a high-power power supply unit is activated for a moment, the large capacitance of these regulated lines instantaneously generates a huge current, so-called Inrush Current. These excessive surge currents cause the protection circuit to misjudge the circuit and cause a short circuit to activate the short circuit protection function, resulting in the motor or servo not functioning properly.

Although some power supply units are equipped with switches, and even some power supply units can support the soft start function, the user sometimes activates the power supply unit before the power supply unit is connected to the load, so that the soft start function is completed, resulting in the power supply unit. The output generates a supply voltage. In the state where the power supply voltage is generated at the output end of the power supply device, when the user connects the power supply device to the load (hot wire), a huge surge current is instantaneously generated, so that the protection circuit misjudges that the circuit has a short circuit and starts the short circuit protection. Function that causes the motor or servo to malfunction.

In addition, in order to avoid the malfunction of the protection circuit and the long-term allowable surge current, the power supply device and its internal components may be damaged, so that the power supply device is unstable or the life is shortened. Therefore, there is still room for improvement in the power supply device.

In view of this, the present invention provides a power supply device with a protection mechanism to avoid a short circuit phenomenon due to an instantaneous surge current, thereby causing a power supply device with a protection mechanism to be locked in a protection state, and at the same time, can suppress or divide the surge current. The current value and energy increase the safety, convenience and reliability of the circuit.

The invention provides a power supply device with a protection mechanism, comprising a power supply unit, a soft start adjustment unit, an output end, a detection unit and a control unit. The power supply unit generates a power supply voltage. The soft start adjustment unit is coupled to the power supply unit, receives the power supply voltage and the plurality of control signals, and converts the power supply voltage into a soft start current according to the foregoing control signal, and adjusts and outputs the soft start current or outputs or turns off the power supply voltage. The output end is coupled to the soft start adjustment unit and is adapted to output a soft start current or a power supply voltage. The detecting unit is coupled to the output end, and detects a current state and/or a voltage state of the output end to generate a detection signal. The control unit is coupled to the detecting unit and the soft start adjusting unit, and receives the detection signal to generate a control signal.

The invention provides a power supply device with a protection mechanism, comprising a power supply unit, a switch unit, an output end, a detection unit and a control unit. The power supply unit generates a power supply voltage. The switch unit is coupled to the power supply unit and receives the power supply voltage and the control signal to output or turn off the power supply voltage according to the control signal. The output end is coupled to the switch unit and is adapted to output a power supply voltage. The detecting unit is coupled to the output end to detect a current state and/or a voltage state of the output terminal to generate a detection signal. The control unit is coupled to the detecting unit and the switching unit, and receives the detection signal to generate a control signal.

The power supply device with the protection mechanism provided by the embodiment detects the current state and/or the voltage state of the output terminal by the detecting unit to generate a detection signal, and the control unit determines the operating state of the power supply device with the protection mechanism according to the detection signal. And generate corresponding control signals to control the soft start adjustment unit or the switch unit to perform corresponding operations to determine whether to continuously provide the output voltage or enter the protection state. In this way, it can effectively judge whether the circuit actually has a short circuit and avoid the occurrence of malfunction, that is, avoid the instantaneous surge current and misinterpret the short circuit phenomenon, and at the same time, the current and energy of a huge surge current. The soft start program is introduced by the soft start adjustment unit or divided by the switch unit multiple short circuit protection, thereby preventing the power supply device with the protection mechanism from being locked in the protection state.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the spirit and principles of the present invention, and to provide a further explanation of the scope of the patent application of the present invention.

The detailed features and advantages of the present invention are described in detail below in the embodiments, which are sufficient to enable any skilled artisan to understand the technical contents of the present invention and implement it according to the contents, the scope of the patent application and the drawings. Anyone familiar with the relevant art can easily understand the purpose and advantages of this creation. The following examples further illustrate the inventive concept, but do not limit the scope of the creation in any way.

Certain terms are used throughout the description and claims to refer to particular elements. Those skilled in the art will appreciate that a hardware manufacturer may refer to the same component by a different noun. The scope of the present specification and the patent application do not use the difference in the name as the means for distinguishing the elements, but the difference in function of the elements as the criterion for distinguishing. As used in the specification and the scope of the patent application, "include" is an open term and should be interpreted as "including but not limited to". "Substantially" means that within the range of acceptable errors, those skilled in the art will be able to solve the technical problems within a certain error range, substantially achieving the technical effects. In addition, the term "coupled" is used herein to include any direct and indirect electrical coupling means. Therefore, if a first device is coupled to a second device, the first device can be directly electrically coupled to the second device, or electrically coupled indirectly through other devices or coupling means. Connected to the second device. The description of the specification is intended to be illustrative of the preferred embodiments of the invention. The scope of protection of this application is subject to the definition of the scope of the appended claims.

It is also to be understood that the terms "comprises", "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, article, or Other elements not explicitly listed, or elements that are inherent to such a process, method, commodity, or system. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or system including the element, without further limitation.

In the various embodiments listed below, the same or similar elements or members will be denoted by the same reference numerals.

FIG. 1 is a schematic diagram of a power supply device with a protection mechanism disclosed in the first embodiment of the present invention. The power supply device 100 having the protection mechanism includes a power supply unit 110, a soft start adjustment unit 120, an output terminal 130, a detection unit 140, and a control unit 150.

The power supply unit 110 generates a power supply voltage. In the present embodiment, the power supply unit 110 is, for example, a power supply or a battery pack to generate a high-power supply voltage to facilitate supply to an external load.

The soft start adjustment unit 120 is coupled to the power supply unit 110, and receives the power supply voltage and the plurality of control signals to convert the power supply voltage into a soft start current according to the plurality of control signals, and adjust and output the soft start current or output or turn off the power supply voltage. That is to say, the soft start adjustment unit 120 is controlled by a plurality of control signals to adjust the magnitude of the soft start current or to directly output or turn off the power supply voltage.

Further, the soft start adjustment unit 120 includes a main circuit main switch 121 and a current adjustment unit 122 (such as an impedance-limited current limiting circuit of a soft start program). The main circuit main switch 121 is coupled to the power supply unit 110, the control unit 150, and the output terminal 130. The current adjustment unit 122 is coupled to the control unit 150 and coupled to the main circuit main switch 121 in parallel. For example, when the soft start adjustment unit 120 starts to operate the soft start program, the current adjustment unit 122 is dynamically controlled according to a plurality of different control signals generated by the control unit 150 to generate current values of different soft start currents. And the main circuit main switch 121 is controlled to be turned off without outputting the power supply voltage. Alternatively, when the soft start procedure is completed, the main circuit main switch 121 is controlled to be activated to directly output the power supply voltage, and the operation of the current adjustment unit 122 is turned off. Alternatively, when the soft start program is in progress, the control unit 150 finds that the soft start program cannot be completed normally. If the external line is shorted, the control unit 150 turns off the operation of the main circuit main switch 121 and the off current adjustment unit 122, that is, the power supply voltage is turned off. Output.

The output end 130 is coupled to the soft start adjustment unit 120 and is adapted to output a soft start current or a power supply voltage. Moreover, the output terminal 130 is also adapted to be connected to an external load to output a soft start current or a power supply voltage to an external load for use by an external load.

The detecting unit 140 is coupled to the output end 130 and detects the current state and/or the voltage state of the output terminal 130 to generate a detection signal. The current state and/or voltage state of the output terminal 130 includes, for example, the magnitude of the current value of the soft-start current and/or the voltage value of the output terminal 130, and when the power supply device 100 having the protection mechanism is in the operating state, the output terminal 130 and the external portion. A change in the instantaneous current value generated when the load is connected, or a change in the current value generated when the line is short-circuited.

The control unit 150 is coupled to the detecting unit 140 and the soft start adjusting unit 120 to receive the detection signal to generate a control signal. That is to say, when the control unit 150 receives the detection signal, it can determine the change of the current value and/or the voltage value in the signal according to the situation or state of the system (ie, the power supply device 100 having the protection mechanism). The operation countermeasure mechanism of the power supply device 100 having the protection mechanism generates a control signal correspondingly. Moreover, the foregoing operational state includes, for example, whether the soft start unit 130 completes the soft start operation, whether the output terminal 130 is connected to the external load when the power supply device 100 having the protection mechanism has started to operate, or whether the power supply device 100 having the protection mechanism is the first When the load current is detected once, the short-circuit protection is reached.

In overall operation, it is assumed that the power supply unit 100 having the protection mechanism is indeed connected to an external load, that is, the output terminal 130 is connected to an external load. Next, the user operates the start switch of the power supply device 100 having the protection mechanism so that the power supply device 100 having the protection mechanism starts operating, so that the control unit 150 generates a control signal to the soft start adjustment unit 120 for the soft start operation. That is to say, the soft start adjustment unit 120 adjusts and outputs the soft start current, and then outputs the soft start current to the external load through the output terminal 130. Then, the detecting unit 140 can detect the current state and/or the voltage state of the output terminal 130, and generate a detection signal to the control unit 150, so that the control unit 150 performs corresponding subsequent operations to achieve the monitoring and protection effect.

When the soft start procedure has not been completed, the control unit 150 continuously monitors whether the current value of the soft start current output by the output terminal 130 is normal through the detecting unit 140. If the current value of the soft start current detected by the output terminal 130 is normal, the control unit 150 generates different control signals to control the soft start adjustment unit 120 to adjust the corresponding soft start current to make the working voltage of the external load. Gradually increase to a voltage value that is the same or close to the power supply voltage. When the soft start procedure is completed, the control unit 150 generates a corresponding control signal to control the soft start adjustment unit 120 to directly output the power supply voltage to the external load for use by the external load.

In addition, when the soft start program is in progress, if the current value of the detection signal generated by the detecting unit 140 is not the expected soft start current, and the current value is greater than the preset soft start current value in the control unit 150, A circuit may have a short circuit. After a preset monitoring time, when the control unit 150 determines that the current value of the received detection signal is still greater than the preset current value, indicating that the circuit has a short circuit, the control unit 150 generates a corresponding control signal, which will The power supply device 100 with the protection mechanism stops outputting the soft start current or is completely turned off, or issues an alarm indicating that the circuit has a short circuit, thereby informing the user that the subsequent maintenance of the power supply device 100 having the protection mechanism or its external load is required. .

In another embodiment, it is assumed that the power supply device 100 having the protection mechanism has not been connected to the external load, that is, the output terminal 130 is not connected to the external load, and the user operates the startup switch of the power supply device 100 having the protection mechanism to have a protection mechanism. The power supply unit 100 starts operating, so that the control unit 150 controls the soft start adjustment unit 120 to perform a soft start procedure. Then, the control unit 150 continuously monitors whether the current state and/or the voltage state of the output terminal 130 is normal through the detecting unit 140, and the control unit 150 finds that the output terminal 130 is not connected to the external load, and the control unit 150 returns to the current time. The initial state of the soft start program is performed, that is, the main circuit main switch 121 is not activated, only the impedance current limiting path of the soft start program is started, and waiting for connection with an external load to restart the soft start procedure. After waiting for more than a predetermined "no-load idle time", the control unit 150 generates a corresponding control signal, and the power supply device 100 with the protection mechanism can be completely turned off to save power consumption.

In another case, the user connects the external load to the power supply device 100 having the protection mechanism, that is, the external load is connected to the output terminal 130, due to a predetermined "no-load idle time", due to the power supply device 100 having the protection mechanism. Already in the initial state of the soft start procedure, the detecting unit 140 detects the current value of the detection signal generated when the external load is connected to the control unit 150, and the control unit 150 generates a corresponding control signal to complete the soft start procedure. And monitor the process of the soft start program is normal. If the current value is greater than the preset soft start current value in the control unit 150, it indicates that the circuit has a short circuit. Then, the control unit 150 generates a corresponding control signal, and stops the power supply device 100 having the protection mechanism from outputting the soft start current or completely shuts down, or issues an alarm indicating that the circuit has a short circuit, thereby informing the user that the protection mechanism is required. The power supply device 100 or its external load performs processing for subsequent maintenance.

In another embodiment, it is assumed that the power supply device 100 having the protection mechanism has not been connected to the external load, that is, the output terminal 130 is not connected to the external load, and the user operates the startup switch of the power supply device 100 having the protection mechanism to have a protection mechanism. The power supply device 100 starts to operate, so that the control unit 150 controls the soft start adjustment unit 120 to perform a soft start procedure and completes the soft start program operation, and controls the main circuit main switch 121 to be activated and the soft start adjustment unit 120 to directly output the power supply voltage. Then, the control unit 150 continuously monitors whether the current state and/or the voltage state of the output terminal 130 is normal through the detecting unit 140, and waits for connection with an external load. After waiting for more than a predetermined "no-load idle time", the control unit 150 generates a corresponding control signal, and the power supply device 100 with the protection mechanism can be completely turned off to save power consumption.

In another case, the user connects the external load to the power supply device 100 having the protection mechanism, that is, the external load is connected to the output terminal 130, due to a predetermined "no-load idle time", due to the power supply device 100 having the protection mechanism. The soft start procedure has been completed and the main loop main switch 121 has been activated, so the detection unit 140 will continuously detect the current state and/or voltage state of the output terminal 130 and generate a detection signal to the control unit 150 for subsequent processing. Then, when the current value of the detection signal generated by the detecting unit 140 suddenly increases, and the current value is greater than the preset short-circuit current value in the control unit 150, it indicates that the circuit may have a surge current or a short circuit. At this time, the control unit 150 activates the short circuit protection, turns off the main circuit main switch 121, and restarts the soft start procedure to limit the surge current or the short circuit protection.

After that, during the restarting soft start procedure, the control unit 150 continues to read the current value of the detection signal generated by the detection unit 140, if the current value of the detection signal is less than the preset soft start current value. When the circuit indicates that there is no short circuit, that is, the current value suddenly increases to an instantaneous surge current, the control unit 150 generates a corresponding control signal to control the soft start adjustment unit 120 to continue the soft start procedure. If the current value of the detection signal is greater than the preset soft start current value during the restarted soft start procedure, indicating that the circuit has a short circuit, the control unit 150 generates a corresponding control signal, and the power supply device 100 having the protection mechanism The output of the soft start current is stopped or completely turned off, or an alarm can be issued to indicate that the circuit has a short circuit, thereby informing the user that the power supply device 100 having the protection mechanism or its external load needs to be subjected to subsequent maintenance. Alternatively, the control unit 150 may lock the power supply device 100 having the protection mechanism in a protected state, or may completely shut down the power supply device 100 having the protection mechanism to save power consumption.

2 is a schematic diagram of a power supply device with a protection mechanism disclosed in a second embodiment of the present invention. The power supply device 200 having the protection mechanism includes a power supply unit 210, a switch unit 220, an output terminal 230, a detection unit 240, and a control unit 250.

The power supply unit 210 generates a power supply voltage. In the present embodiment, the power supply unit 210 is, for example, a power supply or a battery pack to generate a high-power supply voltage to facilitate supply to an external load.

The switch unit 220 is coupled to the power unit 210 and receives the power voltage and the control signal to output the power voltage according to the control signal. In this embodiment, the switching unit 220 is, for example, a field effect transistor (MOSFET), and the switching unit 220 is turned on or off by the control signal to output or not output a power supply voltage.

The output terminal 230 is coupled to the switch unit 220 and is adapted to output a power supply voltage. Moreover, the output terminal 230 is also adapted to be connected to an external load to output a power supply voltage to an external load for use by an external load.

The detecting unit 240 is coupled to the output terminal 230 to detect the current and/or voltage state of the output terminal 230 to generate a detection signal. The current state and/or voltage state of the output terminal 230 includes, for example, the voltage value of the output terminal 230, and the change of the instantaneous current value generated when the output terminal 230 of the power supply device 200 having the protection mechanism is connected to the external load in the operating state. Or the change in the current value generated when the line is short-circuited.

The control unit 250 is coupled to the detecting unit 240 and the switching unit 220 to receive a detection signal to generate a control signal. That is to say, when the control unit 250 receives the detection signal, it can judge and correspondingly generate the control signal according to the change of the current value and/or the voltage value in the detection signal and the operation state of the power supply device 200 having the protection mechanism at that time. Moreover, the foregoing operational state includes, for example, whether the output terminal 230 is connected to the external load before or after the power supply device 200 having the protection mechanism is started, or whether the power supply device 200 having the protection mechanism is connected to the external load or after A short circuit occurs. This means that the control mechanism setting in the control unit 250 is "dynamic" and "resettable" according to the operating state of the power supply device 200 having the protection mechanism at the time, that is, when the control unit 250 receives the detection signal, The corresponding control signal is generated according to the control mechanism setting value in the control unit 250 at that time. For example, when the power supply device 200 with the protection mechanism starts operating in the first time, the set values of the "short circuit current protection threshold" and/or the "short circuit protection delay time threshold" in the control unit 250 can be set to be more sensitive. Low value to divide the current magnitude and energy of the surge current when the external load is connected. After the surge current elimination and segmentation process is completed, the set values of the "short circuit current protection threshold" and/or the "short circuit protection delay time threshold" in the control unit 250 may be set to a relatively less sensitive higher value for general operation. Short circuit protection under normal operating conditions.

In overall operation, in one embodiment, it is assumed that the power supply unit 200 with the protection mechanism is indeed connected to an external load, i.e., the output terminal 230 is connected to an external load. Next, the user operates the start switch of the power supply device 200 having the protection mechanism, so that the power supply device 200 having the protection mechanism starts to operate, so that the control unit 250 generates a control signal to the switch unit 220 to control the switch unit 220 to be turned on. That is to say, the switching unit 220 outputs a power supply voltage to the external load through the output terminal 230. Then, the detecting unit 240 can detect the current state and/or the voltage state of the output terminal 230, and generate a detection signal to the control unit 250, so that the control unit 250 performs corresponding subsequent operations to achieve the monitoring and protection effect.

When the current value of the detection signal generated by the detecting unit 240 suddenly increases, and the current value is greater than the preset short-circuit current value in the control unit 250, it indicates that the circuit may have a surge current or a short circuit. At this time, the control unit 250 starts the short circuit protection, and the control unit 250 tries to distinguish whether the source of the short circuit current is a surge current or a real line short circuit within a preset time. Then, according to a preset time interval, the control unit 250 sequentially generates corresponding control signals, similar to the analog soft start behavior, such as a low logic level control signal, a high logic level control signal, and a low logic level control. The signal, the control signal of the high logic level, the control signal of the low logic level, and the control signal of the high logic level are controlled to be turned on and off three times by the switching unit 220, and then the power supply voltage is supplied to the outside through the output terminal 230. load. At the same time, the control unit 250 continuously detects the current state and/or the voltage state of the output terminal 230 through the detecting unit 240 to determine whether the circuit actually has a short circuit of the real external line.

After a predetermined time, when the control unit 250 determines that the current value of the received detection signal continues to be greater than the preset short-circuit current value, indicating that the circuit has a short circuit, the control unit 250 generates a corresponding control signal. The power supply device 200 with the protection mechanism is stopped, or an alarm is issued to indicate that the circuit is short-circuited, thereby informing the user that the power supply device 200 having the protection mechanism or its external load needs to be repaired later, or The power supply device 200 having the protection mechanism is locked in the protection state, or the power supply device 200 having the protection mechanism can be completely turned off to save power consumption.

In another embodiment, it is assumed that the power supply device 200 having the protection mechanism has not been connected to the external load, that is, the output terminal 230 is not connected to the external load, and the user operates the startup switch of the power supply device 200 having the protection mechanism to have a protection mechanism. The power supply unit 200 starts operating, so that the control unit 250 controls the switching unit 220 to be turned on to output a power supply voltage to the output terminal 230. Then, the control unit 250 continuously monitors whether the current state of the output terminal 230 is normal through the detecting unit 240, and waits for connection with an external load. After waiting for more than a predetermined "no-load idle time", the control unit 250 generates a corresponding control signal, and the power supply device 200 with the protection mechanism can be completely turned off to save power consumption.

In another case, the user connects the external load to the power supply device 200 having the protection mechanism, that is, the external load is connected to the output terminal 230, due to a predetermined "no-load idle time", due to the power supply device 200 having the protection mechanism. The operation has started, so that the current value of the detection signal generated by the detecting unit 240 suddenly increases. If the current value is greater than the preset short-circuit current value in the control unit 250, it indicates that the circuit may have a large surge current or a short circuit. At this time, the control unit 250 sequentially generates corresponding control signals, such as a low logic level control signal, a high logic level control signal, a low logic level control signal, and a high logic level. The control signal of the bit, the control signal of the low logic level, and the control signal of the high logic level control the switching unit 220 to conduct and conduct three times, and then supply the power supply voltage to the external load through the output terminal 230. Moreover, the control unit 250 continues to detect the current state of the output terminal 230 through the detecting unit 240 to determine whether the circuit actually has a short circuit.

Then, after a preset time, the control unit 250 determines that the current value of the received detection signal is less than the preset current value, indicating that the circuit does not have a short circuit, that is, the current value suddenly increases to an instant. The surge current, the control unit 250 generates a corresponding control signal to control the switch unit 220 to continuously conduct to continue to supply the power supply voltage to the external load, instead of erroneously determining the short circuit phenomenon, so the power supply device 200 with the protection mechanism is not locked in the protection. status.

Further, the power supply device 200 having the protection mechanism further includes a counting and timing unit 260. The counting and timing unit 260 is connected to the control unit 250 to provide a (programmable) count value to the control unit 250, so that when the current value of the detection signal generated by the detecting unit 240 suddenly increases, the control unit 250 can correspond to the count value. The preset time is used to control the switching unit 220 to perform corresponding conduction and non-conduction, and continuously detect the current state of the output terminal 230 through the detecting unit 240 to determine whether the circuit has a short circuit or only an instantaneous surge current.

The power supply device with the protection mechanism provided by the embodiment detects the current state and/or the voltage state of the output terminal by the detecting unit to generate a detection signal, and the control unit determines whether the circuit has a short circuit according to the detection signal, and Corresponding control signals are generated to control the soft start adjustment unit or the switch unit to perform corresponding operations to determine whether to continuously provide an output voltage or enter a protection state. In this way, it is possible to accurately determine whether the circuit actually has a short circuit and avoid the occurrence of malfunction, that is, avoid the instantaneous surge current and misinterpret the short circuit phenomenon, and at the same time, borrow a huge current and energy of the surge current. The soft start adjustment unit introduces a soft start program or multiple short circuit protection for splitting, thereby preventing the power supply device with protection mechanism from being locked in the protection state.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the present invention. The changes and refinements that are made without departing from the spirit and scope of this creation are within the scope of patent protection of this creation. Please refer to the attached patent application scope for the scope of protection defined by this creation.

100,200‧‧‧Power supply units with protection mechanisms
110, 210‧‧‧Power unit
120‧‧‧Soft start adjustment unit
121‧‧‧Main circuit main switch
122‧‧‧Current adjustment unit
130, 230‧‧‧ output
140, 240‧‧‧Detection unit
150, 250‧‧‧ control unit
260‧‧‧Counting and timing unit
220‧‧‧Switch unit

FIG. 1 is a schematic diagram of a power supply device with a protection mechanism disclosed in the first embodiment of the present invention. 2 is a schematic diagram of a power supply device with a protection mechanism disclosed in a second embodiment of the present invention.

100‧‧‧Power supply unit with protection mechanism

110‧‧‧Power unit

120‧‧‧Soft start adjustment unit

121‧‧‧Main circuit main switch

122‧‧‧Current adjustment unit

130‧‧‧ Output

140‧‧‧Detection unit

150‧‧‧Control unit

Claims (8)

A power supply device with a protection mechanism includes: a power supply unit that generates a power supply voltage; a soft start adjustment unit coupled to the power supply unit, receiving the power supply voltage and a plurality of control signals, according to the control signals, The power supply voltage is converted into a soft start current, and the soft start current is output and output or the power supply voltage is turned off; an output terminal coupled to the soft start adjustment unit is adapted to output the soft start current or the power supply voltage; a unit coupled to the output, detecting a current state and/or a voltage state of the output to generate a detection signal; and a control unit coupled to the detection unit and the soft start adjustment unit to receive the detection signal to generate These control signals. The power supply device with the protection mechanism of claim 1, wherein the soft start adjustment unit comprises: a main circuit main switch coupled to the power supply unit, the control unit and the output end; and a current adjustment unit coupled The control unit is coupled in parallel with the main circuit main switch. The power supply device with protection mechanism according to claim 1, wherein the power supply unit is a power supply or a battery pack. A power supply device with a protection mechanism as claimed in claim 1, wherein the control unit is a microcontroller or a microprocessor. A power supply device having a protection mechanism, comprising: a power supply unit for generating a power supply voltage; a switch unit coupled to the power supply unit, receiving the power supply voltage and a control signal for outputting the power supply voltage according to the control signal; The output end is coupled to the switch unit and is adapted to output the power supply voltage; a detecting unit coupled to the output end, detecting a current state and/or a voltage state of the output end to generate a detection signal; and a control unit coupled The detecting unit and the switching unit are connected to receive the detection signal to generate the control signal. The power supply device with the protection mechanism as claimed in claim 5, further comprising: a counting and timing unit coupled to the control unit to provide a count value and a timing value to the control unit. The power supply device with protection mechanism according to claim 5, wherein the power supply unit is a power supply or a battery pack. A power supply device having a protection mechanism as claimed in claim 5, wherein the control unit is a microcontroller or a microprocessor.