CN109217402B - Control circuit of charging seat and control method thereof - Google Patents
Control circuit of charging seat and control method thereof Download PDFInfo
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- CN109217402B CN109217402B CN201710550549.1A CN201710550549A CN109217402B CN 109217402 B CN109217402 B CN 109217402B CN 201710550549 A CN201710550549 A CN 201710550549A CN 109217402 B CN109217402 B CN 109217402B
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- 239000003990 capacitor Substances 0.000 claims description 26
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
A control method for the control circuit of charging stand includes receiving the power supply signal from power supply converter, providing the power supply signal to processing circuit via switch circuit to drive the processing circuit, detecting the potential of power supply signal by processing circuit and controlling the switch of switch circuit by power supply signal and processing circuit. The control circuit and the control method of the charging seat can ensure that the processing circuit in the charging seat can correspondingly operate or close respectively according to the coupling or disconnection of the power converter and the charging seat, so that the processing circuit can correspondingly switch from operation to closing when the power converter is pulled out from the charging seat under the condition that the power converter is continuously plugged in and pulled out, and correspondingly recover normal operation (can control the charging seat to normally supply power to a load) without crash when the power converter is electrically connected to the charging seat again.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to a control circuit of a charging seat and a control method thereof.
[ background of the invention ]
In known electronic products, the portable electronic product includes a rechargeable battery. The rechargeable battery can be divided into a detachable type and a non-detachable type, the detachable rechargeable battery can be independently placed on the charging seat, and the non-detachable rechargeable battery can be connected to the charging seat through the electronic product. When the power of the rechargeable battery is exhausted, the user can connect the charging seat to the external power supply and provide the power to the rechargeable battery through the charging seat, and the rechargeable battery can store the power to supply the power required by the electronic product during operation.
In order to provide power, most charging stations include a control circuit, which can control whether the charging station supplies power. When the charging seat is not connected with the rechargeable battery or the electronic product, the control circuit can control the charging seat not to supply power; when the charging seat is connected with the rechargeable battery or the electronic product, the control circuit can control the charging seat to supply power. However, if the habit of using the charging stand by the user is bad, the charging stand is down and cannot supply power. For example, when a user continuously plugs a plug of the charging base into the socket and then pulls the plug out of the socket within a short time, the control circuit is easily shut down, so that the charging base cannot supply power temporarily, and in a serious case, even the charging base may be damaged permanently and cannot supply power.
[ summary of the invention ]
In one embodiment, a control circuit of a charging cradle comprises: power input port, switch circuit and processing circuit. The power input port receives a power signal from the power converter. The switch circuit is conducted with the control signal according to the power signal. The processing circuit is coupled to the switch circuit, and the processing circuit receives the power supply signal through the switch circuit to operate. When the power supply is in operation, the processing circuit outputs the control signal and detects the potential of the power supply signal. When the electric potential of the power supply signal is lower than a threshold value, the processing circuit closes the control signal to close the switch circuit.
In one embodiment, a method for controlling a control circuit of a charging cradle comprises: the power supply circuit is used for receiving a power supply signal from the power supply converter, providing the power supply signal to the processing circuit through the switching circuit so as to drive the processing circuit to operate, detecting the potential of the power supply signal by the processing circuit and simultaneously controlling the switching circuit to be switched on and off by the power supply signal and the processing circuit.
In summary, according to the control circuit of the charging dock and the control method thereof in any embodiment, the processing circuit in the charging dock can be respectively and correspondingly operated or shut down according to the coupling or disconnection of the power converter and the charging dock, so that when the power converter is continuously plugged in or unplugged from the charging dock, the processing circuit can be correspondingly switched from operation to shut down when the power converter is unplugged from the charging dock, and correspondingly resumes normal operation (can control the charging dock to normally supply power to the load) when the power converter is electrically reconnected to the charging dock without shutdown.
[ description of the drawings ]
Fig. 1 is a schematic diagram of a charging cradle connected between a power converter and a load according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating a control method of a control circuit of a charging cradle according to an embodiment of the present invention.
FIG. 3 is a block diagram of a control circuit of the cradle of FIG. 1 according to an embodiment.
FIG. 4 is a circuit diagram of another embodiment of the control circuit of the charging cradle of FIG. 1.
[ detailed description ] embodiments
Fig. 1 is a schematic diagram of a charging cradle connected between a power converter and a load according to an embodiment of the invention. Referring to fig. 1, a charging dock 1 can be detachably connected to a power converter 2 and a load 3. The power converter 2 can convert an external ac power into a dc power and provide a power signal to the charging dock 1, and then the charging dock 1 supplies power to the load 3 according to the power signal to charge the load 3. In one embodiment, the voltage level of the power signal provided by the power converter 2 may be 3.3 volts (V). The load 3 may be a rechargeable battery or an electronic device with a rechargeable battery, such as a tablet computer, a mobile phone, a digital camera, and a personal digital assistant.
Fig. 2 is a flowchart of an embodiment of a control method of the control circuit of the charging cradle 1 according to the present invention. Fig. 3 is a circuit block diagram of an embodiment of the control circuit of the charging cradle 1 of fig. 1. Please refer to fig. 1 to fig. 3. The charging dock 1 includes a power input port 11, a switch circuit 12 and a processing circuit 13, and the switch circuit 12 is coupled between the power input port 11 and the processing circuit 13. The processing circuit 13 can control the power supply of the charging cradle 1. In one embodiment, the processing circuit 13 may be a microprocessor or microcontroller.
The switch circuit 12 includes an input terminal 12A, a control terminal 12B, and an output terminal 12C. The processing circuit 13 includes an input terminal 13A, a power terminal 13B and an output terminal 13C. The input terminal 12A of the switch circuit 12 is coupled to the power input port 11. The control terminal 12B of the switch circuit 12 is coupled to the power input port 11 and the output terminal 13C of the processing circuit 13. The output terminal 12C of the switching circuit 12 is coupled to the power terminal 13B of the processing circuit 13. An input terminal 13A of the processing circuit 13 is coupled to the power input port 11. When the charging dock 1 is electrically connected to the power converter 2, the power input port 11 receives the power signal S1 from the power converter 2 (step S01), the input terminal 12A and the control terminal 12B of the switch circuit 12 receive the power signal S1, and the switch circuit 12 is turned on according to the power signal S1 received by the control terminal 12B. When the switch circuit 12 is turned on, the output terminal 12C of the switch circuit 12 transmits the power signal S1 received by the input terminal 12A, and the switch circuit 12 provides the power signal S1 to the processing circuit 13 to drive the processing circuit 13 to operate (step S02).
When the processing circuit 13 is operating, the processing circuit 13 detects the voltage level of the power signal S1 through the input terminal 13A (step S03), and the processing circuit 13 controls the switch of the switch circuit 12 according to the voltage level of the power signal S1. When the processing circuit 13 detects that the voltage level of the power signal S1 is equal to or higher than a threshold, the output terminal 13C of the processing circuit 13 outputs a control signal S2 to the control terminal 12B of the switch circuit 12, the voltage level of the control signal S2 is greater than the turn-on voltage of the switch circuit 12, for example, the voltage level of the control signal S2 may be 3.3V, and the control signal S2 turns on the switch circuit 12; when the processing circuit 13 detects that the voltage level of the power signal S1 is lower than the threshold, for example, when the electrical connection between the power converter 2 and the charging dock 1 is disconnected, the processing circuit 13 turns off the control signal S2, that is, the processing circuit 13 does not output the control signal S2 to turn off the switch circuit 12.
Accordingly, the processing circuit 13 controls the switching of the switching circuit 12 in cooperation with the power supply signal S1 (step S04). When the charging dock 1 is electrically connected to the power converter 2, the power signal S1 controls the switch circuit 12 to be turned on, and the processing circuit 13 detects that the potential of the power signal S1 is not lower than the threshold when the charging dock 1 is electrically connected to the power converter 2, and the control signal S2 and the power signal S1 output by the processing circuit 13 control the switch circuit 12 to be turned on at the same time; when the charging dock 1 is electrically disconnected from the power converter 2 and the voltage level of the power signal S1 is not lower than the threshold, the processing circuit 13 detects that the voltage level of the power signal S1 is not lower than the threshold, and outputs the control signal S2 to maintain the switch circuit 12 turned on; when the charging dock 1 is electrically disconnected from the power converter 2 and the voltage level of the power signal S1 is lower than the threshold, the processing circuit 13 detects that the voltage level of the power signal S1 is lower than the threshold, and the processing circuit 13 does not output the control signal S2 to control the switch circuit 12 to turn off. Thus, when the switching circuit 12 is turned off, the power source terminal 13B of the processing circuit 13 does not receive the power source signal S1 when the switching circuit 12 is turned off, and the processing circuit 13 is turned off and does not operate. In one embodiment, the processing circuit 13 can be switched from operation to shutdown within 0.0005mS after the electrical connection between the power converter 2 and the charging dock 1 is disconnected. Therefore, when the user continuously plugs or unplugs the power converter 2, the processing circuit 13 can be rapidly switched between operation and shutdown, and when the user continuously plugs or unplugs the power converter 2 and then electrically connects the power converter 2 to the charging stand 1, the processing circuit 13 can normally operate, so that the charging stand 1 can normally supply power to the load 3.
Further, in an embodiment, when the charging dock 1 and the power converter 2 are electrically disconnected, the switch circuit 12 can provide a pre-stored power to the processing circuit 13 to maintain the operation of the processing circuit 13. As shown in fig. 3, the control circuit of the charging dock 1 may further include a capacitor 14, one end of the capacitor 14 is coupled to the power input port 11 and the input end 12A of the switch circuit 12, and the other end of the capacitor 14 is coupled to the ground GND. When the charging dock 1 is electrically connected to the power converter 2, the capacitor 14 receives the power signal S1 and charges the power converter, and the capacitor 14 stores the power signal S1; when the charging dock 1 and the power converter 2 are electrically disconnected and the voltage level of the power signal S1 is not lower than the threshold, the input terminal 12A of the switch circuit 12 receives the power signal S1 from the capacitor 14, and the switch circuit 12 provides the power signal S1 received from the capacitor 14 to the processing circuit 13 through the output terminal 12C in step S02 to maintain the operation of the processing circuit 13. When the charging dock 1 is electrically disconnected from the power converter 2 and the voltage level of the power signal S1 is lower than the threshold, the processing circuit 13 turns off the switch circuit 12, the capacitor 14 is disconnected from the power source terminal 13B of the processing circuit 13, and the power source terminal 13B of the processing circuit 13 is turned off without receiving the power signal S1 from the capacitor 14.
In one embodiment, the control circuit of the cradle 1 further comprises a charging circuit 18 and a power output node 19, and the processing circuit 13 further comprises another output terminal 13D. The power output node 19 is coupled to the charging circuit 18, and the charging circuit 18 is coupled to the output terminal 12C of the switching circuit 12 and the output terminal 13D of the processing circuit 13. When the charging dock 1 is electrically connected to the power converter 2, the switch circuit 12 provides the power signal S1 to the charging circuit 18 (step S05), and the processing circuit 13 outputs the charging control signal S4 through the output terminal 13D to control the charging circuit 18 to generate the charging signal S3 suitable for the load 3 according to the power signal S1 (step S06), and output the charging signal S3 through the power output node 19 (step S07). The load 3 may be charged after receiving the charging signal S3.
In one embodiment, the control circuit of the charging dock 1 further includes a regulator 15, the regulator 15 is coupled between the power input port 11 and the input port 12A of the switch circuit 12, and the capacitor 14 is coupled to the power input port 11 via the regulator 15. When the charging dock 1 is electrically connected to the power converter 2, the voltage regulator 15 receives the power signal S1 through the power input port 11, the voltage regulator 15 can regulate the voltage of the power signal S1 and output a regulated power signal S1 in step S02, and the switch circuit 12 provides the regulated power signal S1 to the processing circuit 13. The capacitor 14 can also be charged according to the power signal S1 from the regulator circuit 15 to store the power signal S1. In one embodiment, the Regulator circuit 15 may be a Low Dropout Regulator (LDO), a capacitor circuit, or any integrated circuit with voltage regulation function.
Fig. 4 is a circuit diagram of another embodiment of the control circuit of the charging cradle of fig. 1. As shown in fig. 4, the switching circuit 12 includes a first electrical chip switch 121 and a second electrical chip switch 122. The first electrical chip switch 121 is coupled between the power input port 11 and the power terminal 13B of the processing circuit 13, and the second electrical chip switch 122 is coupled between the power input port 11 and the output terminal 13C of the processing circuit 13. The first electrical chip switch 121 is controlled by the second electrical chip switch 122, and the second electrical chip switch 122 is controlled by the power signal S1 and the processing circuit 13. When the charging dock 1 is electrically connected to the power converter 2, in step S04, the power signal S1 turns on the second electrical chip switch 122, when the second electrical chip switch 122 is turned on, the second electrical chip switch 122 turns on the first electrical chip switch 121, and when the first electrical chip switch 121 is turned on, the first electrical chip switch 121 provides the power signal S1 to the processing circuit 13 and the charging circuit 18, so that the processing circuit 13 operates to detect the potential of the power signal S1 and control the charging circuit to generate the charging signal S3; on the other hand, when the electrical connection between the charging dock 1 and the power converter 2 is disconnected, the processing circuit 13 determines that the potential of the power signal S1 is lower than the threshold, and the processing circuit 13 controls the second electrical chip switch 122 to turn off. When second electrical chip switch 122 is closed, second electrical chip switch 122 closes first electrical chip switch 121. When the first electrical chip switch 121 is turned off, the power source terminal 13B of the processing circuit 13 does not receive the power source signal S1, and the processing circuit 13 is turned off and does not operate.
Further, taking the first electrical chip switch 121 and the second electrical chip switch 122 as Metal Oxide Semiconductor (MOS) field effect chips, and the first electrical chip switch 121 and the second electrical chip switch 122 are P-type electrical chips and N-type electrical chips, respectively, as shown in fig. 4, the first electrical chip switch 121 includes a drain terminal 121D, a source terminal 121S and a gate terminal 121G, and the source terminal 121S and the drain terminal 121D are used as the input terminal 12A and the output terminal 12C of the switch circuit 12, respectively. The second electrical chip switch 122 includes a drain terminal 122D, a source terminal 122S and a gate terminal 122G, the gate terminal 122G is used as the control terminal 12B of the switch circuit 12. The drain terminal 121D of the first electrical chip switch 121 is coupled to the power source terminal 13B of the processing circuit 13. The source terminal 121S of the first electrical chip switch 121 is coupled to a connection point between the output terminal of the voltage regulator 15 and the capacitor 14. The gate terminal 121G of the first electrical chip switch 121 is coupled to the source terminal 121S and the drain terminal 122D of the second electrical chip switch 122, the source terminal 122S of the second electrical chip switch 122 is coupled to the ground GND, and the gate terminal 122G of the second electrical chip switch 122 is coupled to the power input port 11, the output terminal 13C of the processing circuit 13 and the source terminal 122S.
When the charging dock 1 is electrically connected to the power converter 2, the gate terminal 122G of the second electrical on-chip switch 122 receives the power signal S1 from the power input port 11, the power signal S1 turns on the second electrical on-chip switch 122, the source terminal 122S of the second electrical on-chip switch 122 turns on the drain terminal 122D, the drain terminal 122D is turned on and grounded, and the drain terminal 122D has a low potential. The drain 122D transmits a low voltage to the gate 121G of the first electrical on-chip switch 121, so that the first electrical on-chip switch 121 is turned on. When the first electrical chip switch 121 is turned on, the drain terminal 121D of the first electrical chip switch 121 is turned on to the source terminal 121S, the drain terminal 121D transmits the power signal S1 received by the source terminal 121S from the voltage regulator circuit 15, and the processing circuit 13 receives the power signal S1 from the drain terminal 121D of the first electrical chip switch 121 for operation. In operation, the processing circuit 13 outputs a control signal S2 to the gate terminal 122G of the second electrical chip switch 122 to control the switching of the second electrical chip switch 122.
On the other hand, when the electrical connection between the charging dock 1 and the power converter 2 is disconnected and the processing circuit 13 has not determined that the potential of the power signal S1 is lower than the threshold, the second electrical chip switch 122 is turned on according to the control signal S2 output by the processing circuit 13, the drain terminal 122D of the second electrical chip switch 122 is turned on and grounded, and the first electrical chip switch 121 is controlled by the drain terminal 122D of the second electrical chip switch to be turned on. The source 121S of the first electrical chip switch 121 receives the power signal S1 stored in the capacitor 14, and the drain 121D transmits the power signal S1 stored in the capacitor 14 when the first electrical chip switch 121 is turned on, so as to maintain the operation of the processing circuit 13. Therefore, when the processing circuit 13 determines that the potential of the power signal S1 is lower than the threshold value after the charging dock 1 and the power converter 2 are electrically disconnected, the processing circuit 13 does not output the control signal S2, so that the second electrical chip switch 122 is turned off, the drain terminal 122D of the second electrical chip switch 122 is not turned on and grounded, the first electrical chip switch 121 is turned off, and the processing circuit 13 is turned off without receiving the power signal S1. When the charging dock 1 is electrically connected to the power converter 2 again, the processing circuit 13 operates according to the power signal S1 provided by the first electrical chip switch 121.
In one embodiment, as shown in fig. 4, the control circuit of the charging dock 1 further includes a voltage divider circuit 16, and the power input port 11 includes a positive terminal 111 and a negative terminal 112. The negative contact 112 is coupled to the ground GND. The voltage divider 16 is coupled between the positive terminal 111 and the negative terminal 112 of the power input port 11, and the voltage divider 16 is coupled between the power input port 11 and the input terminal 13A of the processing circuit 13 (i.e., the input terminal 13A of the processing circuit 13 is coupled to the power input port 11 via the voltage divider 16). Then, in step S03, the voltage dividing circuit 16 receives the power signal S1 and generates a voltage dividing signal of the power signal S1, the processing circuit 13 receives the voltage dividing signal from the voltage dividing circuit 16, and the processing circuit 13 detects the voltage level of the voltage dividing signal and determines whether the voltage level of the power signal S1 is lower than the threshold value.
In detail, the voltage divider circuit 16 includes two voltage divider resistors 161 and 162 connected in series. One end of the voltage dividing resistor 161 is coupled to the positive electrode contact 111, and one end of the voltage dividing resistor 162 is coupled to the negative electrode contact 112. A connection point C between the voltage dividing resistors 161 and 162 is coupled to the input terminal 13A of the processing circuit 13. The node C may generate a voltage-divided signal of the power signal S1, and the processing circuit 13 may receive the voltage-divided signal from the node C and detect the voltage level of the voltage-divided signal to determine whether the voltage level of the power signal S1 is lower than a threshold. For example, taking the two voltage-dividing resistors 161 and 162 having the same resistance value as an example, when the divided voltage signal is less than half of the threshold, the processing circuit 13 may determine that the voltage level of the power signal S1 is lower than the threshold. When the divided voltage signal is greater than or equal to half of the threshold value, the processing circuit 13 may determine that the potential of the power signal S1 is not lower than the threshold value.
In another embodiment, as shown in fig. 3, the input terminal 13A of the processing circuit 13 can also be directly connected to the power input port 11, the processing circuit 13 receives the power signal S1 from the power input port 11 and directly detects the voltage level of the power signal S1, and the processing circuit 13 directly compares the voltage level of the power signal S1 with the threshold value to determine whether the voltage level of the power signal S1 is lower than the threshold value.
In an embodiment, referring to fig. 2 to 4, the control circuit of the charging dock 1 further includes a reverse current prevention circuit including a first reverse diode 171 and a second reverse diode 172. The anti-reverse diode 171 is coupled between the power input port 11 and the gate terminal 122G of the second electrical chip switch 122, the anode of the anti-reverse diode 171 is coupled to the gate terminal 122G of the second electrical chip switch 122, and the cathode of the anti-reverse diode 171 is coupled to the power input port 11; the second anti-reverse diode 172 is coupled between the gate terminal 122G of the second electrical chip switch 122 and the output terminal 13C of the processing circuit 13, the anode of the second anti-reverse diode 172 is coupled to the output terminal 13C of the processing circuit 13, and the cathode of the second anti-reverse diode 172 is coupled to the gate terminal 122G of the second electrical chip switch 122. Accordingly, the first diode 171 can prevent the reverse current from flowing back to the power input port 11 from the switch circuit 12 (step S08), and the second diode 172 can prevent the reverse current from flowing back to the processing circuit 13 from the switch circuit 12 (step S09), so that the second electrical chip switch 122 will not be turned on by the noise from the power input port 11 and the output terminal 13C of the processing circuit 13 to cause the processing circuit 13 to malfunction.
In summary, according to the control circuit of the charging dock and the control method thereof in any embodiment, the processing circuit in the charging dock can be respectively and correspondingly operated or turned off according to the coupling or disconnection between the power converter and the charging dock, so that when the power converter is continuously plugged or unplugged, the processing circuit can be correspondingly switched from operation to turning off when the power converter is unplugged from the charging dock, and correspondingly resumes normal operation (can control the charging dock to normally supply power to the load) when the power converter is electrically reconnected to the charging dock without shutdown.
Although the present invention has been described with reference to particular embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (14)
1. A control circuit of a charging seat is characterized in that the control circuit of the charging seat comprises:
a power input port for receiving a power signal from a power converter;
a switch circuit having an input terminal for receiving the power signal, a control terminal for receiving the power signal and a control signal, and an output terminal, wherein the switch circuit is turned on according to the power signal and the control signal received by the control terminal to transmit the power signal received by the input terminal to the output terminal or turned off not to transmit the power signal received by the input terminal to the output terminal;
a capacitor, a first end of which is coupled to the power input port and the input end of the switch circuit, and a second end of which is grounded, the capacitor being configured to store the power signal when the charging seat is electrically connected to the power converter, and to provide the stored power signal to the input end of the switch circuit when the charging seat is electrically disconnected from the power converter and the potential of the power signal is not lower than a threshold value; and
a processing circuit having a power source end, an input end and an output end, wherein the power source end of the processing circuit is coupled to the output end of the switch circuit, the input end of the processing circuit is coupled to the power input port, and the output end of the processing circuit is coupled to the control end of the switch circuit, wherein when the power source end of the processing circuit does not receive the power signal transmitted by the switch circuit via the output end of the switch circuit, the processing circuit is not operated, and when the power source end of the processing circuit receives the power signal transmitted by the switch circuit via the output end of the switch circuit, the processing circuit starts to operate, wherein after the processing circuit starts to operate, the processing circuit detects a potential of the power signal input via the power input port via the input end of the processing circuit, and determines whether to output the control signal to the switch via the output end of the processing circuit according to the detection result The control terminal of the circuit, wherein when the detection result is that the potential of the power signal is lower than the threshold value, the processing circuit does not output the control signal through the output terminal of the processing circuit to turn off the switch circuit, and the processing circuit turns off and does not operate because the power terminal of the processing circuit does not receive the power signal after the switch circuit is turned off.
2. The control circuit of the charging-stand according to claim 1, further comprising:
the charging circuit is controlled by the processing circuit to generate a charging signal according to the power supply signal transmitted by the switch circuit; and
a power output node for outputting the charging signal.
3. The control circuit of the charging dock of claim 1, wherein the control circuit of the charging dock further comprises: a voltage stabilizing circuit, which receives the power signal input via the power input port and stabilizes the power signal, wherein the power signal stored in the capacitor is the power signal stabilized by the voltage stabilizing circuit, the input terminal of the switch circuit receives the power signal stabilized by the voltage stabilizing circuit, the control terminal of the switch circuit receives the power signal input via the power input port, and the switch circuit transmits the power signal stabilized by the voltage to the processing circuit when being conducted, so that the processing circuit starts to operate when receiving the power signal stabilized by the switch circuit.
4. The charging dock control circuit of claim 1, further comprising a voltage divider circuit coupled between the power input port and the processing circuit, the voltage divider circuit receiving the power signal to generate a voltage-divided signal of the power signal, wherein the processing circuit determines whether the voltage level of the power signal is lower than the threshold according to the voltage-divided signal.
5. The charging dock control circuit of claim 1, wherein the processing circuit receives the power signal provided by the capacitor via the output terminal of the switch circuit to maintain operation when the electrical connection between the charging dock and the power converter is disconnected and the voltage level of the power signal is not lower than the threshold.
6. The control circuit of the charging cradle according to claim 5, wherein the switch circuit comprises:
a first electrical chip switch coupled between the first end of the capacitor and the power source end of the processing circuit; and
the second electric chip switch is conducted according to the power signal and the control signal so as to conduct the first electric chip switch;
when the first electric chip switch is turned on, the power supply end of the processing circuit receives the power supply signal from the capacitor through the first electric chip switch to operate.
7. The charging-stand control circuit of claim 6, wherein the power input port comprises a positive contact and a negative contact, the charging-stand device control circuit further comprising:
a first anti-reverse diode coupled between the positive electrode contact and a control terminal of the second electrical chip switch; and
and the second anti-reverse diode is coupled between the control end of the second electric chip switch and the output end of the processing circuit for outputting the control signal.
8. A control method of a control circuit of a charging seat is characterized by comprising the following steps:
receiving a power supply signal input by a power supply converter through a power supply input port by using a capacitor, and storing the power supply signal;
receiving the power signal passing through the capacitor by using an input end of a switch circuit, receiving a control signal and the power signal input through the power input port by using a control end of the switch circuit, and conducting according to the control signal and the power signal input through the power input port by using the switch circuit to transmit the power signal received by the input end of the switch circuit to an output end of the switch circuit or closing not to transmit the power signal received by the input end of the switch circuit to the output end of the switch circuit, wherein when the electrical connection between the charging seat and the power converter is disconnected and the potential of the power signal is not lower than a threshold value, the capacitor provides the stored power signal to the input end of the switch circuit;
coupling a power source end of a processing circuit to the output end of the switching circuit, so that the processing circuit does not operate when the power source end of the processing circuit does not receive the power source signal transmitted by the switching circuit through the output end of the switching circuit, and so that the processing circuit starts to operate when the power source end of the processing circuit receives the power source signal transmitted by the switching circuit through the output end of the switching circuit;
after the processing circuit starts to operate, the processing circuit detects a potential of the power signal input through the power input port through an input end of the processing circuit, and determines whether to output the control signal to the control end of the switch circuit through an output end of the processing circuit according to a detection result; and
when the detection result is that the potential of the power signal is lower than the threshold value, the processing circuit is used for outputting the control signal not through the output end of the processing circuit so as to close the switch circuit, and the processing circuit is closed and does not operate because the power end of the processing circuit does not receive the power signal after the switch circuit is closed.
9. The method as claimed in claim 8, further comprising:
providing the power signal to a charging circuit via the output terminal of the switching circuit;
generating a charging signal by the charging circuit according to the power signal provided by the switch circuit; and
the charging signal is output through a power output node.
10. The method as claimed in claim 8, further comprising:
the power signal input by the power input port is stabilized by a voltage stabilizing circuit, wherein the power signal received and stored by the capacitor and the power signal received by the input end of the switch circuit are stabilized by the voltage stabilizing circuit.
11. The method as claimed in claim 8, wherein the step of detecting the voltage level of the power signal inputted from the power input port by the processing circuit via the input terminal of the processing circuit comprises:
a voltage division circuit divides the power signal input through the power input port to generate a voltage division signal; and
and the input end of the processing circuit judges whether the potential of the power supply signal is lower than the threshold value or not according to the voltage division signal.
12. The method as claimed in claim 8, further comprising: when the electrical connection between the charging socket and the power converter is disconnected and the potential of the power signal is not lower than the threshold value, the processing circuit is used for receiving the power signal provided by the capacitor through the output end of the switch circuit so as to maintain the operation.
13. The method as claimed in claim 8, wherein the step of turning on the switch circuit according to the control signal and the power signal inputted through the power input port to transmit the power signal received by the input terminal of the switch circuit to the output terminal of the switch circuit or turning off the switch circuit not to transmit the power signal received by the input terminal of the switch circuit to the output terminal of the switch circuit comprises:
conducting by a second electrical chip switch of the switching circuit according to the power signal input through the power input port;
when the second electric chip switch is conducted, the second electric chip switch conducts a first electric chip switch of the switch circuit;
when the first electric chip switch is conducted, the power supply signal received by the input end of the switch circuit is transmitted to the output end of the switch circuit so as to provide the power supply signal to the processing circuit and a charging circuit;
turning off the second electrical chip switch when the control signal is not received; and
when the second electrical chip switch is turned off, the first electrical chip switch is turned off by the second electrical chip switch so as not to transmit the power signal received by the input terminal of the switching circuit to the output terminal of the switching circuit.
14. The method as claimed in claim 8, further comprising:
preventing a reverse current from flowing back from the control terminal of the switching circuit to the power input port; and
the reverse current is prevented from flowing back from the control terminal of the switching circuit to the output terminal of the processing circuit.
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| CN111371471B (en) * | 2020-03-16 | 2022-02-08 | 环鸿电子（昆山）有限公司 | Portable terminal and charging seat thereof |
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| TW201517468A (en) * | 2013-10-17 | 2015-05-01 | Richtek Technology Corp | Control circuit and related capacitor charging circuit of power converter |
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| TWI356575B (en) * | 2007-10-05 | 2012-01-11 | Chimei Innolux Corp | Power supply circuit and control method thereof |
| CN101436830B (en) * | 2007-11-15 | 2011-06-08 | 鸿富锦精密工业（深圳）有限公司 | Power supply device and protection method thereof |
| CN102694403B (en) * | 2012-05-30 | 2015-01-21 | 江苏科技大学 | Charger and control method thereof |
| CN203423527U (en) * | 2013-08-09 | 2014-02-05 | 浙江超威创元实业有限公司 | Standby zero-power-consumption circuit for mobile power supply |
| CN103746681B (en) * | 2013-12-24 | 2017-06-30 | 北京时代民芯科技有限公司 | A kind of upper and lower electricity output tri-state control circuit of cmos device power supply |
| CN104065125B (en) * | 2014-06-28 | 2017-10-27 | 青岛歌尔声学科技有限公司 | A kind of charging system of electronic product |
| CN205453083U (en) * | 2015-11-30 | 2016-08-10 | 深圳Tcl数字技术有限公司 | Protection circuit and power connector |
| CN205595875U (en) * | 2016-04-19 | 2016-09-21 | 深圳市嘉洋电池有限公司 | Power management circuit and power supply unit |
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| CN102364856A (en) * | 2011-06-30 | 2012-02-29 | 成都芯源系统有限公司 | Switching power supply and no-load control circuit and control method thereof |
| TW201517468A (en) * | 2013-10-17 | 2015-05-01 | Richtek Technology Corp | Control circuit and related capacitor charging circuit of power converter |
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