CN114567310A - Long-term reset circuit of switching power supply, printed circuit board and electronic equipment - Google Patents
Long-term reset circuit of switching power supply, printed circuit board and electronic equipment Download PDFInfo
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- CN114567310A CN114567310A CN202011362072.2A CN202011362072A CN114567310A CN 114567310 A CN114567310 A CN 114567310A CN 202011362072 A CN202011362072 A CN 202011362072A CN 114567310 A CN114567310 A CN 114567310A
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- 230000007774 longterm Effects 0.000 title claims abstract description 37
- 238000004146 energy storage Methods 0.000 claims abstract description 21
- 238000007599 discharging Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 43
- 238000002955 isolation Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
Abstract
The invention discloses a long-term reset circuit of a switching power supply, a printed circuit board and electronic equipment, which comprise an electric switching circuit, a reset signal maintaining circuit and a power supply energy storage circuit, wherein a power supply input end, the power supply switching circuit and a power supply pin of a chip are sequentially connected; the reset signal maintaining circuit is connected with the power supply switch circuit; the power supply energy storage circuit is respectively connected with the power supply input end and the reset signal maintaining circuit; after reset signal maintaining circuit received reset signal, output turn-off signal gives power supply switch circuit, make power supply switch circuit turn-off, cut off the power supply to the chip, power supply energy storage circuit discharges through reset signal maintaining circuit, make reset signal maintaining circuit stop outputting turn-off signal after discharging, power supply switch circuit switches on again and gives the power pin of chip with the power supply, this reset circuit reset control is simple, the structure is succinct, need not dispose independent auxiliary power supply, also need not increase the switch on power output main road, can reduce the board area, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of switching power supplies, in particular to a long-time reset circuit of a switching power supply, a printed circuit board and electronic equipment.
Background
In current electronic products, the load of the switching power supply often includes a critical chip. The key chip needs to be reset and restarted at some time, and the most effective and common method for resetting the chip is to cut off the power supply for a period of time, then electrify the chip and restart the chip naturally. This requires that when the chip needs to be reset, the system sends an instruction to the reset circuit, and the reset circuit turns off the power supply to the loads such as the chip for a while after receiving the instruction.
For the power supply of medium and small-sized systems and medium and small power, because the circuit function is simple, there is no management system in the power supply, it is difficult to realize the reset function, for example, it is necessary to configure a control circuit to cooperate with an energy storage circuit, it is necessary to adopt an independent auxiliary power supply or to add a switch at the power output end, and the manner of configuring a control circuit to cooperate with an energy storage circuit or adopt an independent auxiliary power supply can make the power supply circuit structure not simple enough, which results in large occupied area of the board, it is necessary to add a switch at the power output end, additional management is needed, there is a problem of complex control, which results in the decrease of the power supply efficiency, and the reliability of the switching power supply is reduced.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the prior art, and provides a long-time reset circuit of a switching power supply, a printed circuit board and electronic equipment, which have the advantages of simple circuit, simple reset control and low cost.
In a first aspect, an embodiment of the present invention provides a long-term reset circuit for a switching power supply, including:
the input end of the power supply switch circuit is connected with the power supply input end, and the output end of the power supply switch circuit is connected to a power supply pin of the chip;
the reset signal maintaining circuit is connected with the power supply switch circuit and is used for outputting a turn-off signal to the power supply switch circuit under the condition of receiving a reset signal;
the power supply energy storage circuit is respectively connected with a power supply input end and the reset signal maintaining circuit, and the power supply energy storage circuit is used for discharging through the reset signal maintaining circuit under the condition that the power supply switch circuit is turned off so that the reset signal maintaining circuit stops outputting the turn-off signal after the power supply energy storage circuit discharges.
In a second aspect, an embodiment of the present invention provides a printed circuit board, including the long-term reset circuit of the switching power supply described in the first aspect.
In a third aspect, an embodiment of the present invention provides an electronic device, including the long-term reset circuit of the switching power supply described in the above first aspect, or including the printed circuit board described in the above second aspect.
The embodiment of the invention comprises the following steps: the long-term reset circuit of the switching power supply, the printed circuit board and the electronic equipment, after the reset signal maintaining circuit receives the reset signal, the reset signal maintaining circuit outputs a turn-off signal to the power supply switching circuit, so that the power supply switching circuit is turned off, the power supply to the power pin of the chip is cut off, then the power supply energy storage circuit discharges through the reset signal maintaining circuit, after the power supply energy storage circuit discharges, the reset signal maintaining circuit stops outputting the turn-off signal, the power supply switching circuit is turned on again to supply power to the power pin of the chip, the long-term reset of the power supply switching circuit is realized through the cooperation between the reset signal maintaining circuit and the power supply energy storage circuit, and further the long-term reset of the chip is realized, the reset circuit has simple reset control and simple structure, does not need to be configured with an independent auxiliary power supply, does not need to add a switch on a main circuit of the power output, and can reduce the occupied area of the board, the cost is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a schematic diagram of a long-term reset circuit of a switching power supply according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a long-term reset circuit of a switching power supply according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a long-term reset circuit of a switching power supply according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of a long-term reset circuit of a switching power supply according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of a long-term reset circuit of a switching power supply according to a fifth embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present embodiments of the present invention, preferred embodiments of which are illustrated in the accompanying drawings, wherein the drawings are provided for the purpose of visually supplementing the description in the specification and so forth, and which are not intended to limit the scope of the invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The embodiment of the invention provides a long-time reset circuit of a switching power supply, a printed circuit board and electronic equipment, and the long-time reset circuit, the printed circuit board and the electronic equipment have the advantages of simple circuit, simple reset control and low cost.
The embodiments of the present invention will be further explained with reference to the drawings.
Referring to fig. 1, a first embodiment of the present invention provides a long-term reset circuit of a switching power supply, including a power supply switching circuit 100, a reset signal maintaining circuit 200, and a power supply tank circuit 300, where:
the input end of the power supply switch circuit 100 is connected with the power supply input end, and the output end of the power supply switch circuit 100 is connected to a power supply pin of the chip;
the reset signal maintaining circuit 200 is connected to the power supply switch circuit 100, and the reset signal maintaining circuit 200 is configured to output a turn-off signal to the power supply switch circuit 100 when receiving a reset signal;
the power supply energy storage circuit 300 is respectively connected to the power input terminal and the reset signal maintaining circuit 200, and the power supply energy storage circuit 300 is configured to discharge through the reset signal maintaining circuit 200 when the power supply switch circuit 100 is turned off, so that the reset signal maintaining circuit 200 stops outputting the turn-off signal after the power supply energy storage circuit 300 discharges.
In the long-term reset circuit of the switching power supply provided in this embodiment, after the reset signal maintaining circuit 200 receives the reset signal, the reset signal maintaining circuit 200 outputs a turn-off signal to the power supply switching circuit 100, so that the power supply switching circuit 100 is turned off to cut off the power supply to the power pin of the chip, then the power supply energy storage circuit 300 discharges through the reset signal maintaining circuit 200, after the power supply energy storage circuit 300 discharges, the reset signal maintaining circuit 200 stops outputting the turn-off signal, the power supply switching circuit 100 is turned on again to supply power to the power pin of the chip, the long-term reset of the power supply switching circuit 100 is realized through the cooperation between the reset signal maintaining circuit 200 and the power supply energy storage circuit 300, so as to realize the long-term reset of the chip, the reset circuit has simple reset control and simple structure, and does not need to configure an independent auxiliary power supply, and does not need to add a switch on the main power supply output circuit, the occupied area of the plate can be reduced, and the cost is reduced.
Referring to fig. 2, in the long reset circuit of the switching power supply, the power switch circuit 100 includes a first switch Q1 and a first diode D1, the reset circuit draws power from the primary winding of the transformer T1, pin 6 of the transformer T1 is connected to the anode of the first diode D1 as the power input terminal of the reset circuit, the cathode of the first diode D1 is connected to one switch pin of the first switch Q1, the other switch pin of the first switch Q1 is connected to the power pin of the chip M1, and the control pin of the first switch Q1 is connected to the reset signal maintaining circuit 200. It can be understood that when the power switch circuit 100 is turned on, that is, the first switch Q1 is turned on, the power provided by the primary winding of the transformer T1 is transmitted to the power pin of the chip M1 through the first diode D1 and the first switch Q1, so that the chip M1 operates normally; if the RESET signal RESET is received by the RESET signal maintaining circuit 200, a low-level turn-off signal is output to the base of the first switching tube Q1, so that the first switching tube Q1 is turned off, and power supply to the power supply pin of the chip M1 is cut off. The first switch Q1 in fig. 2 is an NPN type transistor, that is, the cathode of the first diode D1 is connected to the collector of the first switch Q1, the emitter of the first switch Q1 is connected to the power pin of the chip M1, and the base of the first switch Q1 is connected to the reset signal maintaining circuit 200.
Referring to fig. 2, in the long-term reset circuit of the switching power supply, the reset signal maintaining circuit 200 includes a reset signal input terminal, an off signal output terminal, a second switch tube Q2, a third switch tube Q3, a second resistor R2 and a second capacitor C2, the reset signal input terminal is respectively connected to one end of the second resistor R2, one end of the second capacitor C2, one switch pin of the second switch tube Q2 and a control pin of the third switch tube Q3, the other end of the second resistor R2, the other end of the second capacitor C2 and one switch pin of the third switch tube Q3 are grounded, another switch pin of the third switch tube Q3 is connected to a control pin of the second switch tube Q2, and another switch pin of the second switch tube Q2 is used as the off signal output terminal and is connected to the control pin of the first switch tube Q1.
After receiving the RESET signal RESET from the RESET signal input terminal, the RESET signal maintaining circuit 200 triggers the third switching tube Q3 to turn on, and after the third switching tube Q3 turns on, triggers the second switching tube Q2 to turn on, so as to pull down the potential of the base of the first switching tube Q1, and turn off the first switching tube Q1.
In the long-term reset circuit of the switching power supply in fig. 2, the second switching tube Q2 in the reset signal maintaining circuit 200 is an NPN-type triode, and the third switching tube Q3 is a PNP-type triode; the second switch Q2 and the third switch Q3 in the reset signal maintaining circuit 200 may also be selected from an N-type MOS transistor and a P-type MOS transistor, or selected from a triode and an MOS transistor.
In addition, the reset signal maintaining circuit 200 may also implement its function in the manner shown in fig. 4, where the reset signal maintaining circuit 200 includes a reset signal input terminal, a turn-off signal output terminal, a second resistor R2, a second capacitor C2, and a thyristor Q4, the reset signal input terminal is respectively connected to one end of the second resistor R2, one end of the second capacitor C2, and a control electrode of the thyristor Q4, the other end of the second resistor R2, the other end of the second capacitor C2, and a cathode of the thyristor Q4 are grounded, and an anode of the thyristor Q4 serves as the turn-off signal output terminal and is connected to the control pin of the first switching tube Q1.
After receiving the RESET signal RESET from the RESET signal input terminal, the RESET signal maintaining circuit 200 triggers the thyristor Q4 to turn on, and pulls down the potential of the base of the first switching tube Q1, so that the first switching tube Q1 is turned off.
Referring to fig. 3 and 4, the power supply tank circuit 300 includes a first capacitor C1 and a first resistor R1, wherein one end of the first capacitor C1 and one end of the first resistor R1 are both connected to the cathode of the first diode D1, the other end of the first capacitor C1 is grounded, and the other end of the first resistor R1 is connected to the control pin of the first switch transistor Q1.
When the first switch tube Q1 is turned on, the transformer T1 supplies power to the chip M1 through the first diode D1 and the first switch tube Q1, and after receiving the RESET signal RESET, the RESET signal maintaining circuit 200 outputs a turn-off signal to the first switch tube Q1, so that the first switch tube Q1 is turned off, and power supply to the power pin of the chip M1 is cut off; after the chip M1 stops working, the power supply of the transformer T1 is also cut off correspondingly, the first capacitor C1 finishes charging when the first switch tube Q1 is turned on, so after the first switch tube Q1 is turned off, the first capacitor C1 discharges through the first resistor R1 and the reset signal maintaining circuit 200, when the first capacitor C1 discharges to a certain extent, the discharging current of the first capacitor C1 is small and is not enough to maintain the second switch tube Q2 and the third switch tube Q3 in fig. 3 to be turned on or to maintain the thyristor Q4 in fig. 4 to be turned on, the reset signal maintaining circuit 200 no longer outputs the turn-off signal to the first switch tube Q1, and the first switch tube Q1 is turned on again, so that the chip M1 is reset. The magnitude of the discharge current can be adjusted through the magnitudes of the first capacitor C1 and the first resistor R1, so that the reset time is adjusted, and appropriate parameters are selected so that the reset time meets the long-term reset requirement of the second level.
Referring to fig. 3 and 5, the long-term reset circuit of the switching power supply further includes a reset signal filtering circuit 400, the reset signal filtering circuit 400 includes a third resistor R3 and a third capacitor C3, one end of the third resistor R3 is configured to receive a reset signal, the other end of the third resistor R3 is connected to one end of the third capacitor C3, the other end of the third capacitor C3 is grounded, and the other end of the third resistor R3 and one end of the third capacitor C3 are further connected to a reset signal input end, that is, a connection point of the second resistor R2 and the second capacitor C2. The reset signal filter circuit 400 is arranged to filter out ripple signals in the reset signal and reduce interference.
In addition, the long-term reset circuit of the switching power supply further comprises a reset signal isolation circuit, and the other end of the third resistor R3 and one end of the third capacitor C3 are connected to the reset signal input end through the reset signal isolation circuit. If the RESET signal RESET comes from the secondary winding of the transformer T1, a RESET signal isolation circuit needs to be provided to avoid interference between the primary and secondary windings. Neither of the circuits of fig. 3 and 5 show a reset signal isolation circuit, but this does not affect the understanding of the present invention. The reset signal isolation circuit can be isolated by a relay, can also be isolated by an optical coupler or isolated by other modes, and is not described herein any more.
Referring to fig. 3 and 5, the long-term reset circuit of the switching power supply further includes a reset start auxiliary circuit 500, the reset start auxiliary circuit 500 includes an auxiliary power supply terminal BUS, a fourth resistor R4 and a fourth capacitor C4, the auxiliary power supply terminal BUS is connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected to one end of the fourth capacitor C4, a power supply pin of the chip M1 and an output end of the power supply switching circuit 100, and the other end of the fourth capacitor C4 is grounded.
The reset starting auxiliary circuit 500 is arranged, when the first switch tube Q1 is turned on again, the auxiliary power supply end BUS charges the fourth capacitor C4 through the fourth resistor R4, so that the voltage of the power supply pin of the chip M1 is increased, and the auxiliary chip M1 is started again.
Referring to fig. 3 and 5, in the long-term reset circuit of the switching power supply, the reset start auxiliary circuit 500 further includes a second diode D2, the other end of the fourth resistor R4 is further connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the reset signal maintaining circuit 200.
The second diode D2 is provided, when the first switch Q1 is turned off, the auxiliary power source BUS and the fourth capacitor C4 can be discharged through the second diode D2 and the reset signal maintaining circuit 200, so as to prevent the fourth capacitor C4 from being in a full-charge state all the time.
In a second aspect, an embodiment of the present invention provides a printed circuit board, including the long-term reset circuit of the switching power supply of the embodiment of the first aspect of the present invention. After reset signal maintaining circuit 200 receives the reset signal, output turn-off signal for power supply switch circuit 100, make power supply switch circuit 100 turn-off, cut off the power supply to the power pin of chip, then power supply tank circuit 300 discharges through reset signal maintaining circuit 200, make reset signal maintaining circuit 200 stop outputting turn-off signal after power supply tank circuit 300 discharges, power supply switch circuit 100 switches on again in order to supply power to the power pin of chip, this reset circuit reset control is simple, the structure is succinct, need not dispose independent auxiliary power supply, also need not increase the switch on power output main road, can reduce the area of occupation of the board, reduce cost
In a third aspect, an embodiment of the present invention provides an electronic device, which includes the long-term reset circuit of the switching power supply of the first aspect of the present invention or includes the printed circuit board of the second aspect of the present invention. After reset signal maintaining circuit 200 receives the reset signal, output turn-off signal for power supply switch circuit 100, make power supply switch circuit 100 turn-off, cut off the power supply to the power pin of chip, then power supply tank circuit 300 discharges through reset signal maintaining circuit 200, make reset signal maintaining circuit 200 stop outputting turn-off signal after power supply tank circuit 300 discharges, power supply switch circuit 100 switches on again in order to supply power for the power pin of chip, this reset circuit reset control is simple, and the structure is succinct, need not dispose independent auxiliary power supply, also need not increase the switch on power output main road, can reduce the area of occupation of the board, and cost is reduced.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (11)
1. A long reset circuit for a switching power supply, comprising:
the input end of the power supply switch circuit is connected with the power supply input end, and the output end of the power supply switch circuit is connected to a power supply pin of the chip;
the reset signal maintaining circuit is connected with the power supply switch circuit and is used for outputting a turn-off signal to the power supply switch circuit under the condition of receiving a reset signal;
the power supply energy storage circuit is respectively connected with a power supply input end and the reset signal maintaining circuit, and the power supply energy storage circuit is used for discharging through the reset signal maintaining circuit under the condition that the power supply switch circuit is switched off so as to enable the reset signal maintaining circuit to stop outputting the switching-off signal after the power supply energy storage circuit discharges.
2. The long-term reset circuit of a switching power supply as claimed in claim 1, wherein the power supply switch circuit comprises a first switch tube and a first diode, a power input terminal is connected to an anode of the first diode, a cathode of the first diode is connected to one switch pin of the first switch tube, another switch pin of the first switch tube is connected to a power supply pin of a chip, and a control pin of the first switch tube is connected to the reset signal maintaining circuit.
3. The long-term reset circuit of switching power supply as claimed in claim 2, the reset signal maintaining circuit comprises a reset signal input end, a turn-off signal output end, a second switching tube, a third switching tube, a second resistor and a second capacitor, the reset signal input end is respectively connected to one end of the second resistor, one end of the second capacitor, one switch pin of the second switch tube and the control pin of the third switch tube, the other end of the second resistor, the other end of the second capacitor and one switch pin of the third switch tube are grounded, the other switch pin of the third switch tube is connected to the control pin of the second switch tube, and the other switch pin of the second switch tube is used as the turn-off signal output end and is connected to the control pin of the first switch tube.
4. The long-term reset circuit of a switching power supply according to claim 2, wherein the reset signal maintaining circuit comprises a reset signal input terminal, a turn-off signal output terminal, a second resistor, a second capacitor and a thyristor, the reset signal input terminal is respectively connected to one end of the second resistor, one end of the second capacitor and a control electrode of the thyristor, the other end of the second resistor, the other end of the second capacitor and a cathode of the thyristor are grounded, and an anode of the thyristor serves as the turn-off signal output terminal and is connected to the control pin of the first switching tube.
5. The long-term reset circuit of a switching power supply according to any one of claims 2 to 4, wherein the power supply energy storage circuit includes a first capacitor and a first resistor, one end of the first capacitor and one end of the first resistor are both connected to the cathode of the first diode, the other end of the first capacitor is grounded, and the other end of the first resistor is connected to the control pin of the first switch tube.
6. The long-term reset circuit of a switching power supply according to claim 3 or 4, further comprising a reset signal filter circuit, wherein the reset signal filter circuit includes a third resistor and a third capacitor, one end of the third resistor is configured to receive a reset signal, the other end of the third resistor is connected to one end of the third capacitor, the other end of the third capacitor is grounded, and the other end of the third resistor and one end of the third capacitor are further connected to the reset signal input terminal.
7. The long-term reset circuit of claim 6, further comprising a reset signal isolation circuit, wherein the other end of the third resistor and one end of the third capacitor are connected to the reset signal input terminal through the reset signal isolation circuit.
8. The long-term reset circuit of a switching power supply according to claim 1, further comprising a reset start auxiliary circuit, wherein the reset start auxiliary circuit comprises an auxiliary power supply terminal, a fourth resistor and a fourth capacitor, the auxiliary power supply terminal is connected to one end of the fourth resistor, the other end of the fourth resistor is respectively connected to one end of the fourth capacitor, the power supply pin of the chip and the output terminal of the power supply switching circuit, and the other end of the fourth capacitor is grounded.
9. The long-term reset circuit of a switching power supply according to claim 8, wherein the reset start auxiliary circuit further comprises a second diode, the other end of the fourth resistor is further connected to an anode of the second diode, and a cathode of the second diode is connected to the reset signal maintaining circuit.
10. A printed circuit board comprising the long-term reset circuit of the switching power supply according to any one of claims 1 to 9.
11. An electronic device comprising the long-term reset circuit of the switching power supply of any one of claims 1 to 9 or comprising the printed circuit board of claim 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011362072.2A CN114567310A (en) | 2020-11-27 | 2020-11-27 | Long-term reset circuit of switching power supply, printed circuit board and electronic equipment |
| PCT/CN2021/132126 WO2022111416A1 (en) | 2020-11-27 | 2021-11-22 | Extended-time reset circuit of switching power supply, printed circuit board, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011362072.2A CN114567310A (en) | 2020-11-27 | 2020-11-27 | Long-term reset circuit of switching power supply, printed circuit board and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114567310A true CN114567310A (en) | 2022-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011362072.2A Pending CN114567310A (en) | 2020-11-27 | 2020-11-27 | Long-term reset circuit of switching power supply, printed circuit board and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114567310A (en) |
| WO (1) | WO2022111416A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI241767B (en) * | 2004-11-25 | 2005-10-11 | Sunplus Technology Co Ltd | Power-low reset circuit |
| CN103809492B (en) * | 2014-02-25 | 2016-03-16 | 青岛歌尔声学科技有限公司 | One-touch multifunctional control circuit and wearing electronic product |
| CN206251066U (en) * | 2016-12-13 | 2017-06-13 | 深圳Tcl数字技术有限公司 | Chip reset circuit and electronic equipment |
| CN106874149B (en) * | 2017-03-15 | 2023-11-21 | 深圳市亿道数码技术有限公司 | Hardware watchdog logic circuit |
| CN109597701B (en) * | 2018-10-23 | 2022-06-21 | 上海移远通信技术股份有限公司 | Device for automatically restarting communication module |
| CN209265378U (en) * | 2019-02-20 | 2019-08-16 | 广州视源电子科技股份有限公司 | A kind of reset circuit and display terminal |
-
2020
- 2020-11-27 CN CN202011362072.2A patent/CN114567310A/en active Pending
-
2021
- 2021-11-22 WO PCT/CN2021/132126 patent/WO2022111416A1/en unknown
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| WO2022111416A1 (en) | 2022-06-02 |
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