TWM572062U - Power supply device with electronic circuit breaker - Google Patents

Abstract

The invention is a power supply device with an electronic circuit breaker, comprising a power output, a power converter and an electronic circuit breaker. By the operation of the electronic circuit breaker, when an electrical device is electrically connected as a load between the power output end and the ground terminal, the electronic circuit breaker is activated, so that the voltage outputted by the power converter can be output to the power output end, Electrical equipment is charged. When the electrical equipment is removed and the electronic circuit breaker is removed, the electronic circuit breaker is turned off, so that the voltage output from the power converter cannot be output to the power output. In this way, even if the power output end is exposed outside the casing, when the electrical equipment is not being charged, the power output terminal does not output a voltage, so the user is not shocked by the accidental touch, thereby improving the safety of use.

Description

Power supply device with electronic circuit breaker

The present invention relates to a power supply device, and more particularly to a power supply device having an electronic circuit breaker.

There are many electrical appliances in modern people's homes, and electrical appliances generally have a wire that allows electrical devices to be electrically connected to the outlet through wires to receive utility power and operate normally. In addition, when the electrical equipment is portable, in order to facilitate the user's use, the battery is directly installed in the portable electrical equipment, so that the electrical equipment can directly receive the battery power and operate normally, thereby getting rid of the limitation of the electric wire. User-friendly. When the battery power is consumed, the user must charge the electrical device for the next use.

The more common charging method is to set a charging device, and after the charging device is set to the positioning, the charging device is electrically connected to the socket through the electric wire to receive the electric energy, and the charging device is provided with a set of first charging electrodes. When the battery in the electrical device is out of power, the user can directly place the electrical device on the charging device, thereby contacting a group of second charging electrodes on the electrical device with the set of first charging electrodes on the charging device. The battery in the electrical device can be electrically connected to the charging device through the set of first charging electrodes for charging.

In the foregoing electrical equipment, if the sweeping machine is taken as an example, in order to facilitate the sweeping machine to move to the charging device and constitute electrical contact, the set of first charging electrodes of the charging device must be exposed outside the outer casing to be able to cooperate with the set of electrical equipment. The second charging electrode is in contact. However, when the set of first charging electrodes of the charging device are exposed outside the casing, they are easily touched by the user and cause the user to be shocked. Therefore, the existing charging equipment is inevitably improved.

In view of the fact that the charging device of the existing charging device is exposed and is easily touched by the user and causes the user to be shocked by electric shock, the present invention proposes a power supply device with an electronic circuit breaker, which closes the electrode when the electrical device is not charged. Power supply to avoid the danger of users accidentally touching.

The power supply device with an electronic circuit breaker includes: a power output terminal; a power converter having a first voltage output terminal and a second voltage output terminal; and an electronic circuit breaker including: an electronic switch, the connection Between the power output end and the second voltage output end of the power converter, the electronic switch has a control end to control its on and off; a first comparator has a first positive input end, a first a first input terminal and a first output terminal; the first positive input terminal is connected to the first voltage output terminal through a first voltage dividing circuit, and the first negative input terminal is connected to the first voltage input circuit through a second voltage dividing circuit a voltage output terminal; a switching circuit connected between the first output end of the first comparator and the control end of the electronic switch.

According to the operation of the electronic circuit breaker, when an electrical device is electrically connected as a load between the output end of the power supply and the ground, the voltage of the first positive input of the first comparator of the electronic circuit breaker is greater than the first And a voltage of the negative input terminal, thereby turning on the electronic switch through the switch circuit, thereby connecting the second voltage output end of the power converter to the power output end, thereby charging the electrical device. When the electrical device is fully charged and removed, the voltage of the first positive input terminal of the first comparator of the electronic circuit breaker is less than the voltage of the first negative input terminal, and the switch circuit will turn off the electronic switch, thereby cutting off A second voltage output of the power converter and the power output. In this way, even if the power output end is exposed outside the casing, when the electrical device is not being charged, the power output terminal will not supply power, so the user will not be shocked by the accidental touch, thereby improving the safety of use. Sex.

The technical means adopted by the present invention for achieving the intended purpose are further explained below in conjunction with the drawings and the preferred embodiment of the present invention.

Referring to FIG. 1 , the present invention is a power supply device with an electronic circuit breaker. A first preferred embodiment of the power supply device with an electronic circuit breaker includes a power output. A power converter 11 and an electronic circuit breaker 12 (electronic circuit breaker). In the preferred embodiment, the power converter 11 is a DC-to-DC converter 11.

The power converter 11 includes a first voltage output terminal OUT1 and a second voltage output terminal OUT2.

The electronic circuit breaker 12 includes a first comparator 121, an electronic switch 122, a switch circuit 123, a first voltage dividing circuit 124 and a second voltage dividing circuit 125. The electronic switch 122 is connected to the power output end Between the second voltage output of the power converter 11, the electronic switch has a control terminal to control its on and off.

The first comparator 121 includes a first positive input terminal, a first negative input terminal, and a first output terminal. In the preferred embodiment, the first comparator 121 is of the type LM339.

The first voltage dividing circuit 124 is connected between the first positive input terminal and the first voltage output terminal OUT1. The second voltage dividing circuit 125 is connected between the first negative input terminal and the second voltage output terminal OUT2. The switch circuit 123 is connected between the first output end of the first comparator 121 and the control end of the electronic switch 122.

The novel is operated by the electronic circuit breaker 12, and an electrical device is electrically connected as a load at the output of the power supply. With a ground The voltage between the first positive input terminal of the first comparator 121 of the electronic circuit breaker 12 is greater than the voltage of the first negative input terminal, thereby turning on the electronic switch 122 through the switch circuit 123, thereby making the power converter The second voltage output terminal OUT2 of 11 is connected to the power output end Thereby charging the electrical device. When the electrical device is fully charged and removed, the voltage of the first positive input terminal of the first comparator 121 of the electronic circuit breaker 12 is less than the voltage of the first negative input terminal, and the switch circuit 123 will turn off the electronic switch 122. And cutting off the second voltage output terminal OUT2 of the power converter 11 and the power output end . So that even the power output Exposed to the outside of the enclosure, when the electrical equipment is not charging, the power output No power is supplied, so the user will not be shocked by accidental contact, thereby improving the safety of use.

Referring to FIG. 2 , the power converter 11 includes a primary side loop unit 111 , a primary side coupling coil 112 , a first secondary side coupling coil 113 , a second secondary side coupling coil 114 , and a first Control unit 115.

The primary side loop unit 111 is electrically connected to a power source 20 for inputting an alternating current power source. The primary side coupling coil 112 is electrically connected to the primary side loop unit 111. The first secondary side coupling coil 113 is coupled to the primary side coupling coil 112 and connected to the first voltage output terminal OUT1 to output a first voltage through the first voltage output terminal OUT1. The second secondary side coupling coil 114 is coupled to the primary side coupling coil 112 and connected to the second voltage output terminal OUT2 to output a second voltage through the second voltage output terminal OUT2. The number of turns of the first secondary side coupling coil 113 is larger than the number of turns of the second secondary side coupling coil 114. The control unit 115 is electrically connected to the second secondary side coupling coil 114 and the primary side circuit unit 111, and the control unit 115 generates a control signal according to the second voltage output by the second secondary side coupling coil 1114. Primary side loop unit 111. In the preferred embodiment, the control signal is a Pulse Width Modulation signal.

The second voltage dividing circuit 125 of the electronic circuit breaker 12 includes a first resistor Second resistor a third resistor And a fourth resistor .

The first resistor Electrically connected between the second voltage output terminal OUT2 and the first negative input terminal. The second resistor Electrically connected to the first negative input terminal and the power output terminal between. The third resistor Electrically connected to the output of the power supply And the ground between. The fourth resistor Electrically connected to the first negative input terminal and the ground terminal between.

The first voltage dividing circuit 124 of the electronic circuit breaker 12 includes a fifth resistor a sixth resistor a seventh resistor And an eighth resistor .

The fifth resistor Electrically connected between the first voltage output terminal OUT1 and the first positive input terminal. The sixth resistor Electrically connected to the first positive input terminal and the ground terminal between. The seventh resistor Electrically connected between the first positive input and the first output. The eighth resistor Electrically connected between the second voltage output terminal OUT2 and the first output terminal.

The switch circuit 123 includes a first transistor a second transistor And a third transistor .

The first transistor Having a drain, a gate and a source, the gate is electrically connected to the first output, and the source is electrically connected to the ground . The second transistor An emitter, a base and a collector, the emitter being electrically connected to the first voltage output terminal OUT1, the base being electrically connected to the first transistor Bungee jumping. The third transistor Having an emitter, a base and a collector, the third transistor The collector is electrically connected to the first voltage output terminal OUT1, the third transistor The base is electrically connected to the second transistor The collector's pole.

The electronic switch 122 includes a ninth resistor And a fourth transistor .

The fourth transistor Having a drain, a gate and a source, the fourth transistor The drain is electrically connected to the second voltage output terminal OUT2, the fourth transistor The gate is electrically connected to the third transistor Emitter, the fourth transistor The source is electrically connected to the power output . The ninth resistor Electrically connected to the fourth transistor Gate with the fourth transistor Between the sources.

The circuit operation of the electronic circuit breaker 12 of the power supply device having the electronic circuit breaker of the present invention is as follows.

Please refer to FIG. 3A, when the general standby state, that is, when an electrical device is not electrically connected to the power output. When charging, the first voltage outputted by the first voltage output terminal OUT1 is transmitted through the fifth resistor Sixth resistor And the seventh resistor After partial pressure generation, a first partial pressure is generated Output to the first positive input of the first comparator 121. The second voltage outputted by the second voltage output terminal OUT2 is transmitted through the first resistor Second resistor And the third resistor After partial pressure generation, a second partial pressure is generated Output to the first negative input of the first comparator 121. In the preferred embodiment, the first partial pressure is in the standby state. Less than the second partial pressure . Since the voltage value of the first positive input terminal is less than the voltage value of the first negative input terminal in the standby state, the first output end of the first comparator 121 is grounded to provide a voltage of 0V.

Please refer to FIG. 3B, when the electrical device 30 is electrically connected to the power output. At the time, due to the electrical device 30 and the third resistor Parallel, so through the first resistor Second resistor And the third resistor Second partial pressure generated by partial pressure Will reduce, make this second partial pressure Less than the first partial pressure . In this way, the voltage value of the first positive input terminal will be greater than the voltage value of the first negative input terminal, and the first output end of the first comparator 121 will form a floating.

Referring to FIG. 3C, when the first output end of the first comparator 121 forms a floating, the second voltage outputted by the second voltage output terminal OUT2 will pass through the eighth resistor. Seventh resistor And the sixth resistor After the partial pressure is applied, a third partial pressure is generated at the first output end of the first comparator 121. .

Due to the third partial pressure Further outputting to the first transistor The gate of the first transistor a voltage difference between the gate and the source, allowing the first transistor Entering a conducting state to make the first transistor The drain is electrically connected to the source to further enable the second transistor Base of the first transistor Connected to the ground . And the second transistor The base is grounded, so the second transistor a voltage difference between the emitter and the base causes the second transistor The emitter and the collector are turned on to further enable the third transistor Base of the second transistor Connected to the first voltage output terminal OUT1. When the third transistor The third transistor is connected to the first voltage output terminal OUT1 a voltage difference between the base and the emitter causes the third transistor The emitter and the collector are turned on to further enable the fourth transistor The gate is transmitted through the third transistor Connected to the first voltage output terminal OUT1.

Finally, when the third transistor When the emitter and the collector are turned on, the first voltage output terminal OUT1 passes through the ninth resistor And the third resistor Electrically connected to the ground A loop is formed to generate a current. Therefore the fourth transistor Passing the ninth resistor between the gate and the source Producing a pressure difference to further the fourth transistor The drain is electrically connected to the source, so that the second voltage outputted by the second voltage output terminal OUT2 can pass through the fourth transistor Output to the power output And electrically connected to the output of the power supply The electrical device 30 is charged.

In addition, since the second voltage output terminal OUT2 is the main feedback loop of the power converter 11, that is, the control unit 115 of the power converter 11 is based on the voltage of the main feedback loop, that is, the second The second voltage outputted by the voltage output terminal OUT2 determines whether the control signal is to be output. When the second voltage exceeds a threshold, it indicates that the output voltage of the power converter 11 is too high, so the control unit 115 suspends outputting the control signal, thereby restoring the output voltage of the power converter 11 to The normal value, that is, below the threshold, and the control unit 115 continues to output the control signal when the second voltage does not exceed the threshold, so that the power converter 11 outputs the first voltage and the second Voltage.

Therefore, as shown in FIG. 3D, when the electrical device 30 is removed, the first voltage output terminal OUT1 is originally transmitted through the ninth resistor. And the third resistor Electrically connected to the ground The current generated by the circuit may be reversely fed to the second voltage output terminal OUT2 because the electrical device 30 is removed, so that the second voltage outputted by the second voltage output terminal OUT2 exceeds the threshold. At this time, since the second voltage outputted by the second voltage output terminal OUT2 exceeds the threshold, the control unit 115 suspends outputting the control signal, and when the control unit 115 does not output the control signal, the first secondary side The coupling coil 113 and the second secondary side coupling coil 114 are not coupled to generate a voltage value. Therefore, the first voltage outputted by the first voltage output terminal OUT1 starts to decrease, but because the second voltage output terminal OUT2 receives the current fed in the reverse current, the second voltage outputted by the second voltage output terminal OUT2 Will remain above this threshold without falling.

Since the first voltage outputted by the first voltage output terminal OUT1 starts to decrease, and due to the first partial voltage Is a partial pressure generated according to the first voltage, and thus the first partial pressure Will also begin to fall, when the first partial pressure Falling less than the second partial pressure The first comparator 121 causes the first output terminal of the first comparator 121 to be grounded to provide a voltage of 0 V because the voltage value of the first positive input terminal is less than the voltage value of the first negative input terminal.

When the first output terminal of the first comparator 121 is grounded to provide a voltage of 0 V, the electronic circuit breaker 12 returns to the standby state as shown in FIG. 3A.

For example, in the standby state, the first partial pressure The voltage value is 1.5V, and the second partial pressure The voltage value is 2.5V, and the power output The output voltage value is 2V. When the electrical device 30 is charging, the first partial pressure The voltage value is 16V, and the second partial pressure The voltage value is 15V, and the power output is The output voltage is 18V.

According to the above-mentioned voltage values and the operation flow of FIG. 3A to FIG. 3D, the following table can be simply arranged:  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> </td><td> First positive input (first partial pressure <img wi= "16" he="22" file="TWM572062U_D0056.tif" img-format="jpg"></img>) </td><td> The first negative input (second partial pressure <img wi=" 18" he="22" file="TWM572062U_D0060.tif" img-format="jpg"></img>) </td><td> first output </td></tr><tr>< Td> Standby state (Fig. 3A) </td><td> 1.5V </td><td> 2.5V </td><td> GND </td></tr><tr><td> Electrical equipment At the beginning of the connection (Fig. 3B) </td><td> 1.5V </td><td> less than 1.5V </td><td> Floating </td></tr><tr><td> When the device is charging normally (Fig. 3C) </td><td> 16V </td><td> 15V </td><td> Floating </td></tr><tr><td> Electrical equipment has just been When removed (Figure 3D) </td><td> Less than 15V </td><td> 15V </td><td> GND </td></tr></TBODY></TABLE>

In summary, the present invention is electrically connected to the power output terminal by the operation of the electronic circuit breaker 12 when the electrical device 30 is electrically connected as a load. And the ground Between the time, the electronic circuit breaker 12 can be activated, so that the second voltage of the second voltage output terminal OUT2 of the power converter 11 can be output to the power output end. Thereby, the electrical device 30 is charged. When the electrical device 30 is fully charged and removed, the electronic circuit breaker 12 can be turned off, so that the second voltage of the second voltage output terminal OUT2 of the power converter 12 cannot be output to the power output terminal. . So that even the power output Exposed to the outside of the casing, when the electrical device 30 is not being charged, the power output The second voltage is not output, so the user is not shocked by the accidental touch, thereby improving the safety of use.

Further, referring to FIG. 4, a second preferred embodiment of the power supply device having the electronic circuit breaker is the same as the first preferred embodiment described above, but the power supply device having the electronic circuit breaker is further A power factor converter 13 is included. The primary side circuit unit 111 of the power converter 11 is electrically connected to the power source 20 through the power factor converter 13.

In addition, the electronic circuit breaker 12 further includes a fifth transistor a sixth transistor Tenth resistor And a first capacitor .

The fifth transistor Having a drain, a gate and a source, and the fifth transistor The gate is electrically connected to the first output end of the first comparator 121, the fifth transistor The source is electrically connected to the ground . The sixth transistor Having a drain, a gate and a source, the sixth transistor The drain is electrically connected to the third transistor Base of the sixth transistor The gate is electrically connected to the fifth transistor Bungee, the sixth transistor The source is electrically connected to the ground . The tenth resistor Electrically connected to the second voltage output terminal OUT2 of the power converter 11 and the fifth transistor Between the bungee jumping. The first capacitor Electrically connected to the sixth transistor Bungee with the sixth transistor Between the sources.

Due to the fifth transistor Gate and source with the first transistor The gate is connected to the source in the same way, so as shown in Figure 3C, when the first transistor The fifth transistor is turned into a conducting state It will also enter the conduction state together. And when the fifth transistor The sixth transistor is turned into a conducting state Base of the first transistor Connected to the ground To make the sixth transistor Enter the cutoff state. In addition, as described above, when the first transistor The second transistor is turned into a conducting state Will also enter a conducting state, so the first voltage output terminal OUT1 can pass through the second transistor The first capacitor Charging and letting the third transistor The voltage of the base can follow the first capacitance The charge is slowly increased and further passed through the third transistor The emitter and collector can be slowly increased to allow the electronic circuit breaker 12 to be soft start. And the first capacitor Capacitance value can determine the third transistor The voltage of the base is increased, so the user can design the first capacitor. The capacitance value sets the soft start time of the electronic circuit breaker 12.

In addition, in the preferred embodiment, the power supply device with the electronic circuit breaker further includes a short circuit protector 14 , and the short circuit protector 14 includes a second comparator 141 , a third voltage dividing circuit 142 , and A short circuit protects the switch circuit 143. In the preferred embodiment, the second comparator 141 is of the type LM339.

The second comparator 141 includes a second positive input terminal, a second negative input terminal, and a second output terminal. The second negative input terminal of the second comparator 141 is electrically connected to the first comparator 121. A negative input. The third voltage dividing circuit 142 is connected between the second positive input terminal and the first voltage output terminal OUT1. The short circuit protection switch circuit 143 is connected between the second output end of the second comparator 141 and the first output end of the first comparator 121.

Further, the short circuit protector 14 further includes a diode D.

The diode D includes an anode and a cathode, and an anode of the diode D is electrically connected to the third transistor The emitter.

The third voltage dividing circuit 142 of the short circuit protector 14 includes an eleventh resistor a twelfth resistor a thirteenth resistor And a fourteenth resistor .

The eleventh resistor Electrically connected between the cathode of the diode D and the second positive input. The twelfth resistor Electrically connected to the second positive input terminal and the ground terminal between. The thirteenth resistor Electrically connected between the second positive input and the second output. The fourteenth resistor Electrically connected between the first voltage output and the second output.

The short circuit protection switch circuit 143 of the short circuit protector 14 includes a seventh transistor .

The seventh transistor Having a drain, a gate and a source, the seventh transistor The drain is electrically connected to the first output of the first comparator 121, the seventh transistor a gate electrically connected to the second output of the second comparator 141, the seventh transistor The source is electrically connected to the ground .

The circuit operation mode of the short circuit protector 14 of the power supply device having the electronic circuit breaker of the present invention is as follows.

Please refer to FIG. 5A, when the user accidentally touches the exposed power output. Leading to the power output And the ground The second partial pressure when short circuited Because of the third resistor The two ends are short-circuited and lowered, thereby causing the second partial pressure after the reduction Less than the first partial pressure . Therefore, the voltage value of the first negative input terminal is smaller than the voltage value of the first positive input terminal, so that the first output end of the first comparator 121 will form a floating. At this time, the first transistor is the same as described above with respect to FIG. 3C. The second transistor And the third transistor Will be turned on, and through the first capacitor The electronic circuit breaker 12 will be softly activated to slowly increase the third transistor The voltage of the emitter.

At the same time, due to the third transistor Is turned on, the first voltage output terminal OUT1 will pass through the third transistor The diode D, the eleventh resistor And the twelfth resistor Connected to the ground And form a loop. Thereby providing a second positive input terminal and a fourth partial pressure of the second comparator 141 . At the same time, due to the power output And the ground Short circuit, the second partial pressure Lowering the second partial pressure Less than the fourth partial pressure . The second partial pressure Also outputted to the second negative input terminal of the second comparator 141, therefore, the voltage value of the second positive input terminal of the second comparator 141 is greater than the voltage value of the second negative input terminal, so that the second comparator The second output of 141 will form a floating.

Referring to FIG. 5B, when the second output end of the second comparator 141 forms an open circuit, the first voltage output terminal OUT1 will pass through the fourteenth resistor. The thirteenth resistor And the twelfth resistor Connected to the ground Forming a loop and generating a fifth partial pressure Output to the seventh transistor The gate of the seventh transistor The bungee is connected to the source. And due to the seventh transistor a drain connected to the first output of the first comparator 121 when the seventh transistor The first transistor is when the drain is turned on and the source is turned on The gate can pass through the seventh transistor Connected to the ground Locking the electronic circuit breaker 12 by the short circuit protector 14 to allow the first transistor The second transistor And the third transistor None will be conductive. Therefore, the first voltage output terminal OUT1 cannot pass through the third transistor. Connected to the fourth transistor The gate of the fourth transistor Unable to turn on, control the power output The voltage is maintained at the voltage in the standby state.

When the power output And the ground After the short circuit condition is removed, the second partial pressure It will gradually rise back to the voltage value in standby mode. Please refer to FIG. 5C, when the short circuit state is excluded, the second partial pressure Will gradually rise from the voltage value in the short circuit state, and has not exceeded the first partial pressure The first output end of the first comparator 121 will form an open circuit, and the second output end of the second comparator 141 will also form an open circuit. Therefore, the circuit operation principle is the same as that of FIG. 5B, and details are not described herein again.

Please refer to FIG. 5D, when the second partial pressure Rising above the first partial pressure But has not exceeded the fourth partial pressure The first output of the first comparator 121 will be grounded, and the second output of the second comparator 141 will form an open circuit. At this time, the first transistor The gate will be grounded through the first output of the first comparator 121 and through the seventh transistor. Turning on and grounding, the short circuit protector 14 locks the electronic circuit breaker 12, and the electronic circuit breaker 12 itself enters a standby state, so that the power output end The voltage is maintained at the voltage in the standby state.

Please refer to FIG. 5E, when the second partial pressure Continue to rise above the first partial pressure And exceeding the fourth partial pressure The first output of the first comparator 121 will be grounded, and the second output of the second comparator 141 will be grounded. At this time, the first transistor The gate will be grounded through the first output of the first comparator 121. But when the second partial pressure Exceeding the fourth partial pressure The seventh transistor The gate will be grounded through the second output of the second comparator 141, thereby closing the seventh transistor So that the short circuit protector 14 does not lock the electronic circuit breaker 12. However, due to the first transistor The gate is grounded through the first output end of the first comparator 121, so that the electronic circuit breaker 12 enters a standby state, and the power output terminal is The voltage is maintained at the voltage in the standby state.

For example, in the standby state, the first partial pressure The voltage value is 1.5V, and the second partial pressure The voltage value is 2.5V. When the short circuit protector 14 locks the electronic circuit breaker 12, the fourth partial pressure The voltage value is 2V.

According to the above-mentioned example voltage value and the operation flow of FIG. 5A to FIG. 5E, the following table can be simply arranged:  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> </td><td> First Comparator</td><td> Second Comparison </td><td> fourth transistor <img wi="22" he="22" file="02_image096.jpg" img-format="jpg"></img></td></tr ><tr><td> </td><td> First positive input (first partial pressure <img wi="16" he="22" file="TWM572062U_D0056.tif" img-format="jpg" ></img>) </td><td> The first negative input (second partial pressure <img wi="18" he="22" file="TWM572062U_D0060.tif" img-format="jpg"> </img>) </td><td> First output (third partial pressure <img wi="18" he="24" file="02_image097.jpg" img-format="jpg"></ Img>) </td><td> Second positive input (fourth partial pressure <img wi="18" he="22" file="TWM572062U_D0233.tif" img-format="jpg"></img >) </td><td> First negative input (second partial pressure <img wi="18" he="22" file="TWM572062U_D0060.tif" img-format="jpg"></img> ) </td><td> Second output (5th partial pressure <img wi="18" he="24" file="02_image098.jpg" img-format="jpg"></img>) < /td></tr><tr><td> When short circuited (Fig. 5A) </td><td> 1.5V </td><td> 1V </td><td> Floating </td>< Td> 0V </td><td> 1V </td><td> GND </td><td> Continuity</td></tr><tr><td> When shorted (Figure 5B) </td ><td> 1.5V </td><td> 1V </td><td> Floating </td><td> 2V </td><td> 1V </td><td> Floating </td> <td> Non-conducting</td></tr><tr><td> After the short circuit is removed (Fig. 5C) </td><td> 1.5V </td><td> 1V~1.5V </td> <td> Floating </td><td> 2V </td><td> 1V~1.5V </td><td> Floating </td><td> Non-conducting</td></tr><tr ><td> After the short circuit is removed (Fig. 5D) </td><td> 1.5V </td><td> 1.5V~2V </td><td> GND </td><td> 2V </td ><td> 1.5V~2V </td><td> Floating </td><td> Non-conducting</td></tr><tr><td> After the short circuit is removed (Fig. 5E) </td> <td> 1.5V </td><td> 2V~2.5V </td><td> GND </td><td> 2V </td><td> 2V~2.5V </td><td> GND </td><td> Non-conducting</td></tr></TBODY></TABLE>

Therefore, the electronic circuit breaker 12 enters the standby state when the electronic circuit breaker 12 locks the electronic circuit breaker 12 while the short circuit protector 14 is still unlocking during the unlocking process. , the locking state is overlapped with the effective time of the standby state, thereby ensuring that the electronic circuit breaker 12 does not make the fourth transistor during the unlocking state Turning on, avoiding outputting the second voltage outputted by the second voltage output terminal OUT2 to the power output end The electric shock hits the user who is in the wrong way.

Further, referring to FIG. 6, a third preferred embodiment of the power supply device with an electronic circuit breaker is the same as the second preferred embodiment described above, and the short circuit protector further includes a Zener two. Polar body ZD. The Zener diode ZD includes an anode and a cathode. The anode of the diode D is electrically connected to the third transistor through the Zener diode ZD An emitter, and an anode of the Zener diode ZD is electrically connected to an anode of the diode D, and a cathode of the Zener diode ZD is electrically connected to the third transistor The emitter.

Through the setting of the Zener diode ZD, the first voltage outputted by the first voltage output terminal OUT1 must exceed the breakdown voltage of the Zener diode ZD to enable the short circuit protector 14, thereby avoiding voltage floating. The wrong start caused by the time.

The short circuit protector further includes a fifteenth resistor . The seventh transistor Bungee system through the fifteenth resistor Electrically connected to the first output of the first comparator 121.

The electronic circuit breaker further includes a sixteenth resistor And a seventeenth resistor . The second transistor The base of the system through the sixteenth resistor Electrically connected to the first transistor Bungee jumping. The third transistor The base of the system through the seventeenth resistor Electrically connected to the second transistor The collector's pole.

In addition, the electronic circuit breaker further includes a second capacitor First output capacitor And a second output capacitor . The second capacitor Electrically connected to the negative input end of the first comparator 121 and the ground between. The first output capacitor Electrically connected to the second voltage output terminal OUT2 and the ground terminal between. The second output capacitor Electrically connected to the output of the power supply And the ground between.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention, and any technology that is familiar with the present technology. Those skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. Technical Substantial Equivalents Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present invention.

11‧‧‧Power converter, DC/DC converter

111‧‧‧Primary side loop unit

112‧‧‧primary side coupling coil

113‧‧‧First secondary side coupling coil

114‧‧‧Second secondary side coupling coil

115‧‧‧Control unit

12‧‧‧Electronic circuit breaker

121‧‧‧First comparator

122‧‧‧Electronic switch

123‧‧‧Switch circuit

124‧‧‧First voltage divider circuit

125‧‧‧Second voltage divider circuit

13‧‧‧Power Factor Converter

14‧‧‧Short-circuit protector

141‧‧‧Second comparator

142‧‧‧ Third voltage divider circuit

143‧‧‧Short-circuit protection switch circuit

20‧‧‧Power supply

30‧‧‧Electrical equipment

1 is a circuit diagram of a first preferred embodiment of a power supply apparatus having an electronic circuit breaker of the present invention. 2 is a circuit diagram of a power converter of the power supply device with the electronic circuit breaker of the present invention. 3A to 3D are schematic diagrams showing the flow of use of the first preferred embodiment of the power supply device with the electronic circuit breaker of the present invention. 4 is a circuit diagram showing a second preferred embodiment of the power supply apparatus of the present invention having an electronic circuit breaker. 5A to 5E are schematic diagrams showing the flow of use of the second preferred embodiment of the power supply device with the electronic circuit breaker of the present invention. Fig. 6 is a circuit diagram showing a third preferred embodiment of the power supply apparatus of the present invention having an electronic circuit breaker.

Claims (10)

A power supply device with an electronic circuit breaker, comprising: a power output terminal; a power converter having a first voltage output terminal and a second voltage output terminal; and an electronic circuit breaker comprising: an electronic switch Connected between the power output end and the second voltage output end of the power converter, the electronic switch has a control end to control its on and off; a first comparator includes a first positive input end, a first negative input terminal and a first output terminal; a first voltage dividing circuit connected between the first positive input terminal and the first voltage output terminal; a second voltage dividing circuit connected to the first a negative input terminal and the second voltage output terminal; a switching circuit connected between the first output end of the first comparator and the control end of the electronic switch. The power supply device with an electronic circuit breaker according to claim 1, wherein the power converter further comprises: a primary side circuit unit, the power supply is connected to a power source to receive the power; and the primary side coupling coil is electrically connected to a primary side loop unit; a first secondary side coupling coil coupled to the primary side coupling coil and coupled to the first voltage output terminal for outputting a first voltage through the first voltage output terminal; a secondary side coupling coil coupled to the primary side coupling coil and coupled to the second voltage output terminal for outputting a second voltage through the second voltage output terminal; wherein the first secondary side coupling coil has a larger number of turns a coil number of the second secondary side coupling coil; a control unit electrically connected to the second secondary side coupling coil and the primary side loop unit, and the control unit outputs the output according to the second secondary side coupling coil The second voltage generates a control signal to control the primary side loop unit. The power supply device with an electronic circuit breaker according to claim 1, wherein the switch circuit comprises: a first transistor having a drain, a gate and a source, the gate being electrically connected to the first An output terminal, the source is electrically connected to the ground; a second transistor has an emitter, a base and a collector, the emitter is electrically connected to the first voltage output, the base is electrically Connected to the drain of the first transistor; a third transistor having an emitter, a base and a collector, the collector of the third transistor being electrically connected to the first voltage output terminal, the first The base of the tri-electrode is electrically coupled to the collector of the second transistor. The power supply device with an electronic circuit breaker according to claim 3, wherein the electronic switch comprises: a fourth transistor having a drain, a gate and a source, and a drain of the fourth transistor Electrically connected to the second voltage output terminal, the gate of the fourth transistor is electrically connected to the emitter of the third transistor, the source of the fourth transistor is electrically connected to the power output end; a ninth resistor And electrically connected between the gate of the fourth transistor and the source of the fourth transistor. The power supply device with an electronic circuit breaker according to claim 4, wherein the electronic circuit breaker further comprises: a fifth transistor having a drain, a gate and a source, the fifth transistor The gate is electrically connected to the first output end of the first comparator, the source of the fifth transistor is electrically connected to the ground end; a sixth transistor has a drain, a gate and a source, a drain of the sixth transistor is electrically connected to a base of the third transistor, a gate of the sixth transistor is electrically connected to a drain of the fifth transistor, and a source of the sixth transistor is electrically connected To the ground terminal; a tenth resistor electrically connected between the second voltage output end of the power converter and the drain of the fifth transistor; a first capacitor electrically connected to the 电 of the sixth transistor Between the pole and the source of the sixth transistor. The power supply device with an electronic circuit breaker according to any one of claims 3 to 5, further comprising a short circuit protector, and the short circuit protector comprises: a second comparator comprising a second positive input a second negative input terminal and a second output terminal, the second negative input terminal of the second comparator is electrically connected to the first negative input terminal of the first comparator; a third voltage dividing circuit is connected to a second positive input terminal and the first voltage output terminal; a short circuit protection switch circuit connected between the second output end of the second comparator and the first output end of the first comparator. The power supply device of claim 6, wherein the short circuit protector further comprises: a diode comprising an anode and a cathode, the anode of the diode being electrically connected to the third The emitter of the crystal. The power supply device with an electronic circuit breaker according to claim 6, wherein the short circuit protection switch circuit of the short circuit protector comprises: a seventh transistor having a drain, a gate and a source, the first The drain of the seventh transistor is electrically connected to the first output end of the first comparator, and the gate of the seventh transistor is electrically connected to the second output end of the second comparator, the source of the seventh transistor Electrically connected to the ground. The power supply device with an electronic circuit breaker according to claim 8, wherein the short circuit protector further comprises: a Zener diode comprising an anode and a cathode; wherein an anode of the diode passes through the Zener a diode is electrically connected to the emitter of the third transistor, and an anode of the Zener diode is electrically connected to an anode of the diode, and a cathode of the Zener diode is electrically connected to the third The emitter of the crystal. The power supply device with an electronic circuit breaker according to claim 8, wherein the short circuit protector further comprises: a fifteenth resistor; wherein the drain of the seventh transistor is electrically connected to the fifteenth resistor through the fifteenth resistor a first output of the first comparator.