CN218041211U - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN218041211U CN218041211U CN202221910688.3U CN202221910688U CN218041211U CN 218041211 U CN218041211 U CN 218041211U CN 202221910688 U CN202221910688 U CN 202221910688U CN 218041211 U CN218041211 U CN 218041211U
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Abstract
The application discloses power supply circuit includes: the device comprises a first switch circuit, a control chip, a detection chip and a sampling resistor; the first switch circuit and the sampling resistor are connected in series between the power supply and the load; the detection chip comprises a first acquisition end, a second acquisition end, a detection signal output end, a first input end, a second input end and a comparison result output end; the first acquisition end and the second acquisition end are respectively and electrically connected with two ends of the sampling resistor; the detection signal output end is electrically connected with the first input end; the comparison result output end is electrically connected with the second control end of the first switch circuit; the control chip comprises a control signal output end, a detection signal receiving end and a comparison result receiving end; the control signal output end is electrically connected with a first control end of the first switch circuit. By adopting the technical scheme, the current can be effectively monitored, and the circuit can be effectively controlled and correspondingly processed.
Description
Technical Field
The utility model relates to a power management technical field especially relates to a power supply circuit.
Background
The power supply circuits of direct current electric devices such as electric vehicles, computer hosts, routers and the like mostly need overcurrent protection design so as to protect the direct current electric devices when the current suddenly changes. The current overcurrent protection design generally cannot realize the monitoring function at the same time, and when a large current passes through, the current cannot be effectively monitored, and the circuit cannot be effectively controlled and correspondingly processed so as to protect a power supply and a load.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power supply circuit to when the electric current is too big, carry out effective monitoring and carry out effectual control and corresponding processing to the circuit to the electric current.
According to the utility model discloses an aspect provides a power supply circuit for control and monitoring power supply exports the electric current to the load, a serial communication port, include: the device comprises a first switch circuit, a control chip, a detection chip and a sampling resistor;
the first switch circuit and the sampling resistor are connected in series between the power supply and the load;
the detection chip comprises a first acquisition end, a second acquisition end, a detection signal output end, a first input end, a second input end and a comparison result output end; the first collecting end and the second collecting end are electrically connected with two ends of the sampling resistor respectively; the detection signal output end is electrically connected with the first input end; the second input end is electrically connected with the reference voltage module; the comparison result output end is electrically connected with the second control end of the first switch circuit;
the control chip comprises a control signal output end, a detection signal receiving end and a comparison result receiving end; the control signal output end is electrically connected with a first control end of the first switch circuit; the detection signal receiving end is electrically connected with the detection signal output end; and the comparison result receiving end is electrically connected with the comparison result output end.
Optionally, the first switch circuit includes a first switch, a second switch and a third switch;
the first end of the first switch is electrically connected with the power supply, and the second end of the first switch is electrically connected with the sampling resistor; the control end of the first switch is electrically connected with the first end of the second switch, and the second end of the second switch is grounded; the control end of the second switch is electrically connected with the control signal output end, the control end of the second switch is also connected with the first end of the third switch, and the second end of the third switch is grounded; the control end of the third switch is electrically connected with the comparison result output end; the first end of the third switch is also electrically connected with the comparison result receiving end.
Optionally, the first switch circuit further includes a first capacitor;
the first end of the first capacitor is electrically connected with the power supply, and the second end of the first capacitor is electrically connected with the control end of the first switch.
Optionally, the detection chip further comprises a power supply terminal;
the power end is electrically connected with the power supply.
Optionally, the method further includes: a second switching circuit;
the second switching circuit is connected in series between the power supply and the power supply end;
the control chip also comprises an energy-saving signal output end; the energy-saving signal output end is electrically connected with the control end of the second switch circuit.
Optionally, the second switch circuit includes a fourth switch and a fifth switch;
a first end of the fourth switch is electrically connected with the power supply, and a second end of the fourth switch is electrically connected with the power supply end; the control end of the fourth switch is electrically connected with the first end of the fifth switch, and the second end of the fifth switch is grounded; and the control end of the fifth switch is electrically connected with the energy-saving signal output end.
Optionally, the second switch circuit further includes a second capacitor;
and the first end of the second capacitor is electrically connected with the power supply, and the second end of the second capacitor is electrically connected with the control end of the fourth switch.
Optionally, the method further includes: a first filter capacitor and a second filter capacitor;
the first end of the first filter capacitor is electrically connected with the power supply, and the second end of the first filter capacitor is grounded; the first end of the second filter capacitor is electrically connected with the load, and the second end of the second filter capacitor is grounded.
Optionally, the method further includes: an anti-reverse connection circuit;
the input end of the reverse-connection-prevention circuit is electrically connected with the power supply, and the output end of the reverse-connection-prevention circuit is electrically connected with the load.
The embodiment of the utility model provides a power supply circuit, control chip can output control signal control first switch circuit and switch on or break off, and the voltage at sampling resistor both ends is gathered respectively to the first collection end and the second collection end of detection chip, and the voltage difference at sampling resistor both ends can be calculated and amplified to the detection chip to export the result after amplifying to control chip, and control chip can confirm the current value that flows through sampling resistor according to the detected signal, monitors the electric current that power supply exported to the load; the detection chip can also output the comparison result to the first switch circuit and the control chip, and the first switch circuit and the control chip can protect the power supply and the load.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a power circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of another power circuit provided in an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of another power circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic circuit diagram of a power circuit according to an embodiment of the present invention, for controlling and monitoring a current outputted from a power supply to a load. Referring to fig. 1, the power supply circuit includes a first switching circuit 100, a control chip 200, a detection chip 300, and a sampling resistor R9683; the first switch circuit 100 and the sampling resistor R9683 are connected in series between the power supply and the load; the detection chip 300 comprises a first acquisition end 05, a second acquisition end 06, a detection signal output end 07, a first input end 03, a second input end 02 and a comparison result output end 01; the first acquisition end 05 and the second acquisition end 06 are respectively electrically connected with two ends of a sampling resistor R9683; the detection signal output end 07 is electrically connected with the first input end 03; the second input 02 is electrically connected to a reference voltage module (not shown); the comparison result output terminal 01 is electrically connected to the second control terminal 104 of the first switching circuit 100; the control chip 200 comprises a control signal output end 11, a detection signal receiving end 14 and a comparison result receiving end 12; the control signal output terminal 11 is electrically connected to the first control terminal 103 of the first switch circuit 100; the detection signal receiving end 14 is electrically connected with the detection signal output end 07; the comparison result receiving terminal 12 is electrically connected to the comparison result output terminal 01.
Specifically, the first collecting terminal 05 and the second collecting terminal 06 of the detection chip 300 may respectively collect voltages at two ends of the sampling resistor R9683, and the detection chip 300 may calculate and amplify a voltage difference at two ends of the sampling resistor R9683, and output the amplified voltage difference through the detection signal output terminal 07; the detection chip 300 may further compare the amplified voltage difference with a preset voltage value, and output a comparison result through a comparison result output terminal 01. The control chip 200 may output a control signal through the control signal output terminal 11 to control the on/off of the first switch circuit 100, and may also receive the amplified voltage difference through the detection signal receiving terminal 14, determine the current flowing through the sampling resistor R9683 according to the amplification factor and the resistance value of the sampling resistor R9683, and determine whether the circuit is open-circuited; the control chip 200 may also receive the comparison result in this state when the amplified voltage difference across the sampling resistor R9683 is greater than the preset voltage value, determine whether the current value flowing through the sampling resistor R9683 is too large, and perform corresponding processing.
Illustratively, the input terminal 101 of the first switch circuit 100 is electrically connected to a power supply, the output terminal 102 of the first switch circuit 100 is electrically connected to a first terminal of the sampling resistor R9683, and a second terminal of the sampling resistor R9683 is electrically connected to a load. The control chip 200 outputs a control signal to the first control terminal 103 of the first switch circuit 100 through the control signal output terminal 11, and under the control of the control signal, the first switch circuit 100 is turned on, and the power supply is turned on with the load. When a current signal output to a load by a power supply is normal, a current value flowing through the sampling resistor R9683 is in a normal range, the resistance of the sampling resistor R9683 is generally small, that is, the voltage difference between two ends of the sampling resistor R9683 is small, a detection signal output by the detection signal output end 07 is also small, the amplified voltage difference is smaller than a preset voltage value, the comparison result output end 01 can output a low-level signal to the second control end 104 of the first switch circuit 100, and the low-level signal does not control the first switch circuit; if the circuit of the load part is open, the control chip 200 can determine that the current value flowing through the sampling resistor R9683 is zero through the sampling chip 300, and the control chip 200 can alarm to prompt a user that the load is open; if the current value flowing through the sampling resistor R9683 is large, that is, the voltage difference between the two ends of the sampling resistor R9683 is large, and the amplified voltage difference is larger than the preset voltage value, the comparison result output terminal 01 may output a high-level signal to the second control terminal 104 of the first switch circuit 100, and the high-level signal may control the first switch circuit to be turned off to protect the power supply and the load; meanwhile, the comparison result output end 01 can also output a high-level signal to the comparison result receiving end 12 of the control chip 2, and the control chip 200 can store fault information that the current value of the circuit where the load is located is too large and alarm to prompt a user so as to facilitate subsequent maintenance. It can be understood that the amplification factor of the voltage difference between the two ends of the sampling resistor R9683 and the preset voltage value can be set according to actual requirements, and the embodiment of the present invention does not specifically limit this.
For example, the detection chip 300 may include a subtraction difference amplifier and a comparator, the first acquisition terminal 05 is a non-inverting input terminal of the subtraction difference amplifier, the second acquisition terminal 06 is an inverting input terminal of the subtraction difference amplifier, and the detection signal output terminal 07 is an output terminal of the subtraction difference amplifier; the first input 03 is the non-inverting input of the comparator, the second input 02 is the inverting input of the comparator, and the comparison result output 01 is the output of the comparator. The first acquisition end 05 and the first end of the sampling resistor R9683 can be electrically connected through a resistor R801, and the second acquisition end 06 and the second end of the sampling resistor R9683 can be electrically connected through a resistor R808, so that the first acquisition end 05 and the second acquisition end 06 of the detection chip 300 can be ensured to work effectively; one end of the resistor R813 is electrically connected with the first acquisition end 05, the other end of the resistor R813 is grounded, and the resistor R814 is connected between the second acquisition end 06 and the detection signal output end 07 to ensure that the subtraction difference amplifier operates normally and works effectively, so that the detection chip 300 can effectively perform subtraction operation on the voltages at the two ends of the sampling resistor R9683, and the voltage difference amplification factor at the two ends of the sampling resistor R9683 is adjusted. The first input terminal 03 can be electrically connected to the detection signal output terminal 07 through a resistor R792, the second input terminal 02 can be electrically connected to a reference voltage module (not shown in the figure) through a resistor R793, the second input terminal 02 is further electrically connected to a capacitor C177, the other end of the capacitor C177 is grounded, and the resistor R793 and the capacitor C177 perform a filtering function. The detection signal output end 07 is electrically connected with the detection signal receiving end 14 through a resistor R670, the detection signal receiving end 14 is also electrically connected with a capacitor C181 and a resistor R800, the other end of the resistor R800 and the other end of the capacitor C181 are both grounded, the resistor R670 and the capacitor C181 can play a role in filtering, the resistor R800 can play a role in voltage division, and the voltage value of a detection signal received by the detection signal receiving end 14 can be adjusted through the resistance value of the resistor R800. The comparison result output terminal 01 may output the comparison result to the second control terminal 104 of the first switch circuit 100 and the comparison result receiving terminal 12 of the control chip 200 through the resistor R409, and the resistor R409 may play a role of limiting current and may play a role of protecting a circuit.
The embodiment of the utility model provides a power supply circuit, control chip can output control signal control first switch circuit and switch on or break off, and the voltage at sampling resistor both ends is gathered respectively to the first collection end and the second collection end of detection chip, and the voltage difference at sampling resistor both ends can be calculated and amplified to the detection chip to export the result after amplifying to control chip, and control chip can confirm the current value that flows through sampling resistor according to the detected signal, monitors the electric current that power supply exported to the load; the detection chip can also output the comparison result to the first switch circuit and the control chip, and the first switch circuit and the control chip can protect the power supply and the load.
Optionally, fig. 2 is a schematic circuit diagram of another power circuit provided in an embodiment of the present invention. Referring to fig. 2, the first switching circuit 100 includes a first switch Q42, a second switch Q24, and a third switch Q21; a first end of the first switch Q42 is electrically connected with a power supply, and a second end of the first switch Q42 is electrically connected with the sampling resistor R9683; the control end of the first switch Q24 is electrically connected with the first end of the second switch Q24, and the second end of the second switch Q24 is grounded; the control end of the second switch Q24 is electrically connected with the control signal output end 11, the control end of the second switch Q24 is also connected with the first end of the third switch Q21, and the second end of the third switch Q21 is grounded; the control end of the third switch Q21 is electrically connected with the comparison result output end 01; the first terminal of the third switch Q21 is also electrically connected to the comparison result receiving terminal 12.
For example, the first switch Q42 is a PMOS transistor, the second switch Q24 is an NPN transistor, and the third switch Q21 is an NPN transistor. The control chip 200 may output a high-level control signal to the control terminal of the second switch Q24, the second switch Q24 is turned on, the potential of the control terminal of the first switch Q42 is pulled down by the second terminal of the second switch Q24, the first switch Q42 is turned on, and the power supply may output a current to the load. When the amplified voltage difference at the two ends of the sampling resistor R9683 is smaller than the preset voltage value, the comparison result output end 01 may output a low-level signal, the third switch Q21 is turned off, the potential of the first end of the third switch Q21 may be at a high level as the potential of the control end of the second switch Q24, and at this time, the comparison result receiving end 12 may receive a high-level signal, which indicates that the current flowing through the sampling resistor R9683 is not too large, and the circuit where the load is located is not in an overcurrent state. When the amplified voltage difference at the two ends of the sampling resistor R9683 is greater than the preset voltage value, the comparison result output end 01 may output a high-level signal, the third switch Q21 is turned on, the potential at the first end of the third switch Q21 is pulled down by the second end of the third switch Q21, that is, the potential at the control end of the second switch Q24 is a low level, the second switch Q24 is turned off, the control end of the first switch Q42 cannot maintain the low level, the first switch Q42 is turned off, and the power supply no longer provides current for the load; meanwhile, the third switch Q21 is turned on, and the comparison result receiving terminal 12 can receive a low-level signal, which indicates that the current flowing through the sampling resistor R9683 is too large.
Optionally, the first switch circuit 100 further includes a bias resistor R678, and the bias resistor R678 may enable a potential difference to exist between the first terminal and the control terminal of the first switch Q42, so as to form a bias, so that the first switch Q342 may operate normally. The first switch circuit 100 further includes a resistor R483, a resistor R211, a resistor R791, a resistor R697, and a resistor R795, wherein a control end of the first switch Q42 is electrically connected to a first end of the second switch Q24 through the resistor R483, a control end of the second switch Q24 is electrically connected to the control signal output end 11 of the control chip 200 through the resistor R791 and the resistor R211, a control end of the second switch Q24 is electrically connected to a first end of the third switch Q21 through the resistor R211, a first end of the third switch Q21 is electrically connected to a comparison result receiving end 12 of the control chip 200 through the resistor R795, a first end of the resistor R697 is electrically connected to a control end of the second switch Q24, and a second end of the resistor R697 is grounded. The power supply circuit further comprises a resistor R480, a first end of the resistor R480 is electrically connected with a control end of the third switch Q21, and a second end of the resistor R480 is grounded.
Optionally, with continued reference to fig. 2, the first switch circuit 100 further includes a first capacitor C178, a first end of the first capacitor C178 is electrically connected to the power supply, and a second end of the first capacitor C179 is electrically connected to the control end of the first switch Q42. The first capacitor C178 can control the turn-on speed of the first switch Q42 to play a role of slow turn-on, so as to prevent the first switch Q42 from being turned on too fast, and prevent the load from being damaged by excessive transient current when the first switch Q42 is turned on.
Optionally, with continued reference to fig. 2, the detection chip 300 further includes a power supply terminal 08, and the power supply terminal 08 is electrically connected to a power supply. Specifically, the power supply may supply power to the detection chip 300. Illustratively, the power supply may provide an electrical signal of 12V to the detection chip. The power circuit further comprises a capacitor C184 and a capacitor C185, a first end of the capacitor C184 and a first end of the capacitor C185 are both electrically connected to a power supply terminal 08, a second end of the capacitor C184 and a second end of the capacitor C185 are both grounded, and the capacitor C184 and the capacitor C185 can play a role of filtering.
It is understood that the detecting chip 300 further has a ground terminal 04, and the ground terminal 04 is grounded. The control chip 200 also has a power terminal and a ground terminal (not shown), and the detection chip 300 and the control chip 200 may have other ports besides the ports shown in the drawings, which is not specifically limited by the embodiment of the present invention.
Optionally, fig. 3 is a schematic circuit diagram of another power circuit provided in an embodiment of the present invention. Referring to fig. 3, the power supply circuit further includes a second switching circuit 400, the second switching circuit 400 being connected in series between the power supply and the power source terminal 08; the control chip 200 further includes an energy-saving signal output terminal 13, and the energy-saving signal output terminal 13 is electrically connected to the control terminal 403 of the second switch circuit 400.
Illustratively, the input terminal 401 of the second switch circuit 400 is electrically connected to the power supply, and the output terminal 402 of the second switch circuit 400 is electrically connected to the power supply terminal 08 of the detection chip 300. The control chip 200 outputs an energy-saving signal to the control terminal 403 of the second switch circuit 400 through the energy-saving signal output terminal 13, and the second switch circuit 400 is turned on under the control of the energy-saving signal, so that the power supply is turned on with the power supply terminal 08. When the load and/or the power supply do not need to work or the load or the power supply is in a standby state, the voltage at two ends of the sampling resistor R9683 and the current value flowing through the sampling resistor R9683 do not need to be collected any more, the energy-saving signal output end 13 of the control chip 200 can output an energy-saving signal to the control end 403 of the second switch circuit 400, and the second switch circuit 400 is controlled to be switched off, so that the detection chip 300 stops working, the energy consumption of the power supply circuit is reduced, and the purpose of low power consumption is achieved.
Optionally, with continued reference to fig. 3, the second switching circuit 400 includes a fourth switch Q22 and a fifth switch Q23; a first end of the fourth switch Q22 is electrically connected with the power supply, and a second end of the fourth switch Q22 is electrically connected with the power supply end 08; the control end of the fourth switch Q22 is electrically connected with the first end of the fifth switch Q23, and the second end of the fifth switch Q23 is grounded; the control terminal of the fifth switch Q23 is electrically connected to the power-saving signal output terminal 13.
For example, the fourth switch Q22 is a PNP transistor, and the fifth switch Q23 is an NPN transistor. When the load needs to work, the control chip 200 may output a high-level energy saving signal to the control end of the fifth switch Q23, the fifth switch Q23 is turned on, the potential of the control end of the fourth switch Q22 is pulled low by the second end of the fifth switch Q23, the fourth switch Q22 is turned on, the power supply is turned on with the power supply end 08, and the power supply may supply power to the power supply end 08 of the detection chip 300; when the load does not work, the control chip 200 may output a low-level energy saving signal to the control terminal of the fifth switch Q23, the fifth switch Q23 is turned off, the control terminal of the fourth switch Q22 cannot maintain a low level, the fourth switch Q22 is turned off, the power supply is disconnected from the power source terminal 08, and the power supply no longer supplies power to the power source terminal 08 of the detection chip 300.
Optionally, the second switch circuit 400 further includes a bias resistor R674, and the bias resistor R674 can make a potential difference between the first terminal and the control terminal of the fourth switch Q22, so as to form a bias, and make the fourth switch Q22 operate normally. The first switch circuit 100 further includes a resistor R671, a resistor R676, and a resistor R675, wherein the control end of the fourth switch Q22 is electrically connected to the first end of the fifth switch Q23 through the resistor R671, the control end of the fifth switch Q23 is electrically connected to the energy-saving signal output end 13 of the control chip 200 through the resistor R676, the first end of the resistor R675 is electrically connected to the control end of the fifth switch Q23, and the second end of the resistor R675 is grounded.
Optionally, with continued reference to fig. 3, the second switch circuit 400 further includes a second capacitor C183, a first end of the second capacitor C183 is electrically connected to the power supply, and a second end of the second capacitor C183 is electrically connected to the control end of the fourth switch Q22. The second capacitor C183 can control the opening speed of the fourth switch Q22 to play a role of slow opening, so that the fourth switch Q22 can be prevented from being opened too fast, and the detection chip 300 is prevented from being damaged by too large transient current when the fourth switch Q22 is opened.
Optionally, with continued reference to fig. 3, the power circuit further includes a first filter capacitor C182 and a second filter capacitor C179; a first end of the first filter capacitor C182 is electrically connected with the power supply, and a second end of the first filter capacitor C182 is grounded; a first terminal of the second filter capacitor C179 is electrically connected to the load, and a second terminal of the second filter capacitor C179 is grounded. The first filter capacitor C182 and the second filter capacitor C179 may function as a filter.
Optionally, with continued reference to fig. 3, the power circuit further includes an anti-reverse connection circuit 500, an input terminal 501 of the anti-reverse connection circuit 500 is electrically connected to the power supply, and an output terminal 502 of the anti-reverse connection circuit 500 is electrically connected to the load.
Illustratively, the reverse connection preventing circuit 500 includes a first diode D98 and a second diode D97 connected in parallel, an anode of the first diode D98 and an anode of the second diode D97 are both electrically connected to the power supply through the first switch circuit 100 and the sampling resistor R9683, and a cathode of the first diode D98 and a cathode of the second diode D97 are both electrically connected to the load, so as to prevent reverse connection.
It will be appreciated that various forms of circuit arrangements shown above may be used, with configurations recombined, added or subtracted. For example, the components described in the present invention may exist simultaneously or may not exist in combination with each other, and the present disclosure is not limited thereto as long as the desired result of the technical aspects of the present invention can be achieved.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A power circuit for controlling and monitoring the current delivered by a power supply to a load, comprising: the device comprises a first switch circuit, a control chip, a detection chip and a sampling resistor;
the first switch circuit and the sampling resistor are connected in series between the power supply and the load;
the detection chip comprises a first acquisition end, a second acquisition end, a detection signal output end, a first input end, a second input end and a comparison result output end; the first collecting end and the second collecting end are electrically connected with two ends of the sampling resistor respectively; the detection signal output end is electrically connected with the first input end; the second input end is electrically connected with the reference voltage module; the comparison result output end is electrically connected with the second control end of the first switch circuit;
the control chip comprises a control signal output end, a detection signal receiving end and a comparison result receiving end; the control signal output end is electrically connected with a first control end of the first switch circuit; the detection signal receiving end is electrically connected with the detection signal output end; and the comparison result receiving end is electrically connected with the comparison result output end.
2. The power supply circuit according to claim 1, wherein the first switch circuit comprises a first switch, a second switch, and a third switch;
the first end of the first switch is electrically connected with the power supply, and the second end of the first switch is electrically connected with the sampling resistor; the control end of the first switch is electrically connected with the first end of the second switch, and the second end of the second switch is grounded; the control end of the second switch is electrically connected with the control signal output end, the control end of the second switch is also connected with the first end of the third switch, and the second end of the third switch is grounded; the control end of the third switch is electrically connected with the comparison result output end; the first end of the third switch is also electrically connected with the comparison result receiving end.
3. The power supply circuit of claim 2, wherein the first switching circuit further comprises a first capacitor;
the first end of the first capacitor is electrically connected with the power supply, and the second end of the first capacitor is electrically connected with the control end of the first switch.
4. The power supply circuit according to claim 1, wherein the detection chip further comprises a power supply terminal;
the power end is electrically connected with the power supply.
5. The power supply circuit according to claim 4, further comprising: a second switching circuit;
the second switching circuit is connected in series between the power supply and the power supply end;
the control chip also comprises an energy-saving signal output end; the energy-saving signal output end is electrically connected with the control end of the second switch circuit.
6. The power supply circuit according to claim 5, wherein the second switch circuit includes a fourth switch and a fifth switch;
a first end of the fourth switch is electrically connected with the power supply, and a second end of the fourth switch is electrically connected with the power supply end; the control end of the fourth switch is electrically connected with the first end of the fifth switch, and the second end of the fifth switch is grounded; and the control end of the fifth switch is electrically connected with the energy-saving signal output end.
7. The power supply circuit according to claim 6, wherein the second switch circuit further comprises a second capacitor;
and the first end of the second capacitor is electrically connected with the power supply, and the second end of the second capacitor is electrically connected with the control end of the fourth switch.
8. The power supply circuit according to claim 1, further comprising: a first filter capacitor and a second filter capacitor;
the first end of the first filter capacitor is electrically connected with the power supply, and the second end of the first filter capacitor is grounded; the first end of the second filter capacitor is electrically connected with the load, and the second end of the second filter capacitor is grounded.
9. The power supply circuit according to claim 1, further comprising: an anti-reverse connection circuit;
the input end of the reverse-connection-prevention circuit is electrically connected with the power supply, and the output end of the reverse-connection-prevention circuit is electrically connected with the load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221910688.3U CN218041211U (en) | 2022-07-21 | 2022-07-21 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221910688.3U CN218041211U (en) | 2022-07-21 | 2022-07-21 | Power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218041211U true CN218041211U (en) | 2022-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221910688.3U Active CN218041211U (en) | 2022-07-21 | 2022-07-21 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218041211U (en) |
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2022
- 2022-07-21 CN CN202221910688.3U patent/CN218041211U/en active Active
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