CN216819693U - Isolation voltage driving circuit and electronic device - Google Patents
Isolation voltage driving circuit and electronic device Download PDFInfo
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- CN216819693U CN216819693U CN202123321189.9U CN202123321189U CN216819693U CN 216819693 U CN216819693 U CN 216819693U CN 202123321189 U CN202123321189 U CN 202123321189U CN 216819693 U CN216819693 U CN 216819693U
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Abstract
The application relates to an isolation voltage drive circuit and electronic equipment, wherein isolation voltage drive circuit is used for utilizing first power isolation to carry out on-off control to the second power, isolation voltage drive circuit includes: the first isolation circuit is used for isolating a drive enabling signal input by the first power supply and then outputting a drive signal; the second isolation circuit is connected with the first isolation circuit and used for outputting a switch control signal according to the driving signal; and the driving circuit is connected with the second isolation circuit and used for switching according to the switching control signal so as to control the switching of the second power supply. The application realizes the isolation driving of the first power supply and the second power supply under the condition of not using an isolation chip.
Description
Technical Field
The application belongs to the technical field of drive circuits, and particularly relates to an isolation voltage drive circuit and an electronic device.
Background
At present, when a traditional power driving circuit needs to use one group of independent power supply to control another group of independent power supply switches, mutual influence of two groups of power supplies is easy to occur, output of the controlled independent power supply fluctuates, unstable conditions of the controlled independent power supply can be caused, and the voltage of the whole circuit is caused to have problems.
The traditional solution is to adopt the isolation chip to realize the isolation of two sets of independent power supplies, and a set of independent power supply controls another set of independent power supply through the isolation chip, and the cost of this scheme is higher, and in the actual production process, receives the restriction of isolation chip stock quantity, supply quantity easily, leads to production scale, income also to receive the restriction.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide an isolation voltage driving circuit and an electronic device, and the isolation voltage driving circuit and the electronic device aim at solving the problems of high cost and large production limitation existing in a traditional power isolation scheme.
A first aspect of an embodiment of the present application provides an isolated voltage driving circuit, configured to perform switching control on a second power supply by using first power supply isolation, where the isolated voltage driving circuit includes: the first isolation circuit is used for being connected with the first power supply, and the first isolation circuit is used for isolating a drive enabling signal input by the first power supply and then outputting a drive signal; the second isolation circuit is connected with the first isolation circuit and used for outputting a switch control signal according to the driving signal; and the driving circuit is connected with the second isolation circuit and used for switching according to the switching control signal so as to control the switching of the second power supply.
In one embodiment, the first isolation circuit includes a first voltage dividing circuit, a second voltage dividing circuit, and a third voltage dividing circuit, a first end of the third voltage dividing circuit is connected to the second isolation circuit, and a second end of the third voltage dividing circuit is connected to the first end of the first voltage dividing circuit and the first end of the second voltage dividing circuit, respectively; the second end of the first voltage division circuit is connected with a second reference ground; the controlled end of the first voltage division circuit is connected with the first power supply; a second end of the second voltage division circuit is connected with the second reference ground, and an output end of the second voltage division circuit is connected with a controlled end of the second isolation circuit; the first voltage division circuit is used for being switched on or switched off according to the driving enabling signal so as to output the driving signal at the output end of the second voltage division circuit.
In one embodiment, the first voltage division circuit comprises a first one-way conductor, a first switch tube, a second one-way conductor and a first voltage regulation resistor which are sequentially connected in series; the positive electrode of the first unidirectional conductor is connected with the second end of the third voltage division circuit, the negative electrode of the first unidirectional conductor is connected with the first conducting end of the first switch tube, the second conducting end of the first switch tube is connected with the positive electrode of the second unidirectional conductor, the negative electrode of the second unidirectional conductor is connected with the first end of the first voltage regulation resistor, and the second end of the first voltage regulation resistor is connected with the second reference ground; the second conducting end of the first switch tube is also connected with a first reference ground, and the control end of the first switch tube is connected with the controlled end of the first voltage division circuit.
In one embodiment, the third voltage dividing circuit includes a first voltage dividing resistor; the first end of the first divider resistor is connected with the second isolation circuit; the second end of the first voltage-dividing resistor is connected with the first end of the first voltage-dividing circuit; the second voltage division circuit comprises a third one-way conductor and a second voltage regulation resistor which are sequentially connected in series; the positive electrode of the third unidirectional conductor is connected with the second end of the third voltage-dividing circuit, the negative electrode of the third unidirectional conductor is connected with the first end of the second voltage-regulating resistor, and the second end of the second voltage-regulating resistor is connected with the second reference ground; and the first end of the second voltage regulating resistor is connected with the output end of the second voltage regulating circuit.
In one embodiment, the second isolation circuit includes a second voltage-dividing resistor and a second switching tube; a first end of the second voltage-dividing resistor is connected with the driving circuit, a second end of the second voltage-dividing resistor is connected with a first conducting end of the second switching tube, a control end of the second switching tube is connected with an output end of the second voltage-dividing circuit, the control end of the second switching tube is used as a controlled end of the second isolation circuit, and a second conducting end of the second switching tube is connected with the second reference ground; the first conducting end of the second switch tube is connected with the control end of the driving circuit, and the second switch tube is used for outputting the switch control signal to the driving circuit according to the driving signal.
In one embodiment, the driving circuit comprises a third switching tube and a fourth switching tube; the first conducting end of the third switching tube is connected with the second power supply, the second conducting end of the third switching tube is the output end of the driving circuit and is connected with the first conducting end of the fourth switching tube, and the second conducting end of the fourth switching tube is connected with a second reference ground; and the control end of the third switching tube and the control end of the fourth switching tube are both connected with the control end of the driving circuit.
In one embodiment, the driving circuit further includes an output voltage dividing resistor; the output voltage-dividing resistor is connected in series with the output end of the drive circuit.
In one embodiment, the first isolation circuit further includes a driving resistor and a third voltage dividing resistor; the driving resistor is connected between the first power supply and the control end of the first switching tube in series; the third voltage dividing resistor is connected in series between the control end of the first switch tube and the first reference ground.
In an embodiment, the second voltage division circuit further includes a fourth unidirectional conductor, the fourth unidirectional conductor is connected in series between the third unidirectional conductor and the second voltage regulation resistor, an anode of the fourth unidirectional conductor is connected to a cathode of the third unidirectional conductor, and a cathode of the fourth unidirectional conductor is connected to the first end of the second voltage regulation resistor; the resistance values of the second voltage regulating resistor and the first voltage regulating resistor are equal, and the conduction voltage drops of the first one-way conductor, the second one-way conductor, the third one-way conductor and the fourth one-way conductor are equal.
A second aspect of the embodiments of the present application provides an electronic device, including a first power supply and a second power supply, and an isolated voltage driving circuit as described above connected to the first power supply and the second power supply.
Compared with the prior art, the embodiment of the application has the advantages that: the first power supply can indirectly control the second isolation circuit and the driving circuit through the first isolation circuit, and finally control the output of the driving circuit. Meanwhile, the first power supply, the second power supply and the driving circuit can be isolated under the condition that the isolation chip is not used through the first isolation circuit and the second isolation circuit, and the embodiment of the application cannot be limited by the supply of the isolation chip in the actual production process of products.
Drawings
Fig. 1 is a schematic block diagram of an isolated voltage driving circuit according to an embodiment of the present application;
fig. 2 is a circuit schematic diagram of an isolated voltage driving circuit according to an embodiment of the present disclosure.
The above figures illustrate: 100. a first isolation circuit; 110. a first voltage dividing circuit; 120. a second voltage dividing circuit; 130. a third voltage dividing circuit; 200. a second isolation circuit; 300. a drive circuit.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "coupled in series" to another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Fig. 1 shows a schematic block diagram of an isolated voltage driving circuit according to a first embodiment of the present application.
The isolation voltage driving circuit includes a first isolation circuit 100, a second isolation circuit 200, and a driving circuit 300, which are connected in sequence. The driving circuit 300 can be controlled sequentially through the first isolation circuit 100 and the second isolation circuit 200, and the isolation between the power supply connected with the first isolation circuit 100 and the power supply connected with the driving circuit 300 can be effectively realized.
For convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
as shown in fig. 2, in particular, the isolation voltage driving circuit is configured to drive the second power source VCC in an isolated manner by using the driving enable signal EN output by the first power source, so as to perform switching control on the second power source VCC. The first isolation circuit 100 is used for being connected with a first power supply to receive a driving enable signal EN, and the first isolation circuit 100 is used for isolating the driving enable signal EN input by the first power supply and then outputting a driving signal; the second isolation circuit 200 is connected to the first isolation circuit 100, and is configured to output a switch control signal according to the driving signal; the driving circuit 300 is connected to the second isolation circuit 200, and is configured to perform switching according to the switching control signal to control switching of the second power source VCC.
In this embodiment, an isolation chip is not used, and a circuit composed of the first isolation circuit 100, the second isolation circuit 200 and the driving circuit 300, which are composed of discrete components, is used to control the driving circuit 300 through the first power supply on the premise that the first power supply and the second power supply VCC are isolated from each other.
Specifically, the first power supply corresponds to a first ground reference GND1, and the second power supply VCC corresponds to a second ground reference GND 2. The first ground reference GND1 is different from the second ground reference GND2, and they are isolated from each other.
As shown in fig. 2, the first isolation circuit 100 includes a first voltage dividing circuit 110, a second voltage dividing circuit 120, and a third voltage dividing circuit 130. A first terminal of the third voltage dividing circuit 130 is connected to the input terminal of the second isolation circuit 200, and a second terminal of the third voltage dividing circuit 130 is connected to the first terminal of the first voltage dividing circuit 110 and the first terminal of the second voltage dividing circuit 120, respectively; the second end of the first voltage dividing circuit 110 is connected to the second ground reference GND 2; the controlled terminal of the first voltage dividing circuit 110 is connected to a first power supply; the second terminal of the second voltage divider circuit 120 is connected to the second ground reference GND2, and the output terminal of the second voltage divider circuit 120 is connected to the controlled terminal of the second isolation circuit 200; the first voltage dividing circuit 110 is configured to be turned on or off according to the driving enable signal EN to enable the output terminal of the second voltage dividing circuit 120 to output the driving signal.
Specifically, the third voltage dividing circuit 130 includes a first voltage dividing resistor R1, and a first terminal of the first voltage dividing resistor R1 is connected to the input terminal of the second isolation circuit 200. The first voltage division circuit 110 comprises a first one-way conductor D1, a first switch tube Q1, a second one-way conductor D2 and a first voltage-regulating resistor R3 which are sequentially connected in series; the anode of the first unidirectional conductor D1 is connected to the second end of the first voltage-dividing resistor R1, the cathode of the first unidirectional conductor D1 is connected to the first conducting end of the first switch tube Q1, the second conducting end of the first switch tube Q1 is connected to the anode of the second unidirectional conductor D2, the cathode of the second unidirectional conductor D2 is connected to the first end of the first voltage-dividing resistor R3, and the second end of the first voltage-dividing resistor R3 is connected to the second reference ground GND 2; the second conducting terminal of the first switch Q1 is further connected to the first ground GND1, and the control terminal of the first switch Q1 is connected to the controlled terminal of the first voltage divider circuit 110. The second voltage division circuit 120 comprises a third unidirectional conductor D3 and a second voltage regulation resistor R2 which are sequentially connected in series; the anode of the third unidirectional conductor D3 is connected to the second end of the third voltage-dividing circuit 130, the cathode of the third unidirectional conductor D3 is connected to the first end of the second voltage-regulating resistor R2, and the second end of the second voltage-regulating resistor R2 is connected to the second reference ground GND 2; a first end of the second voltage-regulating resistor R2 is connected to the output end of the second voltage-dividing circuit 120.
The first switch tube Q1 may be an NMOS tube, the first conducting end of the first switch tube Q1 is a drain of the NMOS tube, the second conducting end of the first switch tube Q1 is a source of the NMOS tube, and the control end of the first switch tube Q1 is a gate of the NMOS tube. The first unidirectional conductor D1, the second unidirectional conductor D2 and the third unidirectional conductor D3 are all composed of diodes.
The first unidirectional conductor D1 is used to prevent the first ground reference GND1 from affecting the second power supply VCC and the second ground reference GND2 through the internal diode of the first switch Q1. The second unidirectional conductor D2 is used to prevent the second ground reference GND2 from affecting the first ground reference GND1 through the first voltage-regulating resistor R3. The third unidirectional conductor D3 is used to prevent the second ground reference GND2 from affecting the first ground reference GND1 through the second voltage-regulating resistor R2 and the first unidirectional conductor D1, that is, the first isolation circuit 100 can achieve electrical isolation between the first power supply and the second power supply.
In another embodiment, the first switch Q1 may be a PNP transistor, the first conducting terminal of the first switch Q1 is a collector of the PNP transistor, the second conducting terminal of the first switch Q1 is an emitter of the PNP transistor, and the control terminal of the first switch Q1 is a base of the PNP transistor.
As shown in fig. 2, in the present embodiment, the second voltage dividing circuit 120 further includes a fourth one-way conductor D4, and the fourth one-way conductor D4 is also composed of a diode; the fourth unidirectional conductor D4 is connected in series between the third unidirectional conductor D3 and the second voltage-regulating resistor R2, the resistances of the second voltage-regulating resistor R2 and the first voltage-regulating resistor R3 are equal, the conduction voltage drops of the first unidirectional conductor D1, the second unidirectional conductor D2, the third unidirectional conductor D3 and the fourth unidirectional conductor D4 are equal, and finally, when the first switch tube Q1 is switched on, the voltages of the second voltage-regulating resistor R2 and the first voltage-regulating resistor R3 are equal, so that the voltage output by the first isolation circuit 100 can be accurately controlled. It should be noted that, the first voltage dividing circuit 110 and the second voltage dividing circuit 120 are equivalent to form a parallel circuit, so that when factors such as the resistance value of the first voltage dividing circuit 110 change, the voltage on the second voltage dividing circuit 120 is directly affected, the voltage applied to the second voltage regulating resistor R2 is changed, and the purpose of outputting the driving signal to the second isolation circuit 200 is achieved. The fourth one-way conductor D4 can also prevent the second ground reference GND2 from affecting the first ground reference GND1 through the second voltage-regulating resistor R2 and the first one-way conductor D1.
It can be understood that the first unidirectional conductor D1, the second unidirectional conductor D2, the third unidirectional conductor D3, the fourth unidirectional conductor D4, the first voltage-regulating resistor R3 and the second voltage-regulating resistor R2 may be set to an expected number according to requirements, and it is only necessary to ensure that the second switching tube Q2 is in an off state when the first switching tube Q1 is turned on.
As shown in fig. 2, specifically, when the drive enable signal EN output by the first power supply is at a low level, the first switching tube Q1 is turned off, that is, the first voltage dividing circuit 110 is turned off, and at this time, the second power supply VCC is connected to the second reference ground GND2 through the first voltage dividing resistor R1, the third unidirectional conductor D3, the fourth unidirectional conductor D4, and the second voltage regulating resistor R2, and by setting a resistance ratio of the second voltage regulating resistor R2 to the first voltage dividing resistor R1, the voltage applied to the second voltage regulating resistor R2 can be increased to a high level, that is, the first isolation circuit 100 outputs a high-level drive signal for controlling the second isolation circuit 200 to be connected to the second isolation circuit 200. And the first power supply and the second power supply VCC are isolated from each other and the first ground reference GND1 and the second ground reference GND2 are isolated from each other through the isolation of the first unidirectional conductor D1, the second unidirectional conductor D2, the third unidirectional conductor D3 and the fourth unidirectional conductor D4, so that the purpose of driving the second power supply VCC by isolating the first power supply is realized.
When the drive enable signal EN output by the first power supply is at a high level, the first switching tube Q1 is turned on, that is, the first voltage-dividing circuit 110 is turned on, and at this time, the first voltage-dividing circuit 110 and the second voltage-dividing circuit 120 are connected in parallel, so that the total resistance of the parallel circuit is smaller than the resistance of a single second voltage-dividing circuit 120, the voltage applied to the second voltage-dividing circuit 120 in the loop is reduced, and by setting the resistance ratio of the first voltage-dividing resistor R3 to the first voltage-dividing resistor R1, the voltage applied to the second voltage-dividing resistor R2 can be reduced to a low level, that is, the first isolation circuit 100 outputs a low-level drive signal for controlling the second isolation circuit 200 to be turned off to the second isolation circuit 200.
As shown in fig. 2, in the present embodiment, the second isolation circuit 200 includes a second voltage-dividing resistor R4 and a second switch Q2; a first end of the second voltage-dividing resistor R4 is connected to the input end of the driving circuit 300, a first end of the second voltage-dividing resistor R4 is also connected to a first end of the first voltage-dividing resistor R1 as the input end of the second isolation circuit 200, a second end of the second voltage-dividing resistor R4 is connected to a first conducting end of the second switch Q2, a control end of the second switch Q2 is connected to the output end of the second voltage-dividing circuit 120, a control end of the second switch Q2 is used as the controlled end of the second isolation circuit 200, and a second conducting end of the second switch Q2 is connected to the second reference ground GND 2; the first conducting terminal of the second switching tube Q2 is connected to the control terminal of the driving circuit 300, and the second switching tube Q2 is configured to output a switching control signal to the driving circuit 300 according to the driving signal.
Wherein the switch control signal comprises a stop signal and an output signal. The second switch Q2 may be an NMOS transistor, the first conducting end of the second switch Q2 is a drain of the NMOS transistor, the second conducting end of the second switch Q2 is a source of the NMOS transistor, and the control end of the second switch Q2 is a gate of the NMOS transistor.
In this embodiment, when the driving enable signal EN is at a low level, the driving signal is at a high level, and at this time, the second switch tube Q2 is turned on, so as to pull down the switch control signal at the control end of the driving circuit 300, that is, output the switch control signal (stop signal) at the low level to the driving circuit 300; when the driving enable signal EN is at a high level and the driving signal is at a low level, the second switch Q2 is turned off, and the second power is output to the control terminal of the driving circuit 300 through the second voltage-dividing resistor R4, so as to form a high-level switch control signal (output signal).
In another embodiment, the second switch Q2 may be a PNP transistor, the first conducting terminal of the second switch Q2 is a collector of the PNP transistor, the second conducting terminal of the second switch Q2 is an emitter of the PNP transistor, and the control terminal of the second switch Q2 is a base of the PNP transistor.
As shown in fig. 2, in the present embodiment, the driving circuit 300 includes a third switching tube Q3, a fourth switching tube Q4; a first conducting end of the third switching tube Q3 is connected to the second power source VCC, a first conducting end of the third switching tube Q3 is also an input end of the driving circuit 300, a second conducting end of the third switching tube Q3 is an output end of the driving circuit 300 and is connected to a first conducting end of the fourth switching tube Q4, and a second conducting end of the fourth switching tube Q4 is connected to the second ground GND 2; the control end of the third switch tube Q3 and the control end of the fourth switch tube Q4 are both connected to the control end of the driving circuit 300.
The third switching tube Q3 may be a PNP transistor, and the fourth switching tube Q4 may be an NPN transistor. The first conducting end of the third switching tube Q3 is a collector of the PNP triode, the second conducting end of the third switching tube Q3 is an emitter of the PNP triode, and the control end of the third switching tube Q3 is a base of the PNP triode. A first conduction end of the fourth switching tube Q4 is an emitter of the NPN triode, a second conduction end of the second switching tube Q2 is a collector of the NPN triode, and a control end of the fourth switching tube Q4 is a base of the NPN triode.
In another embodiment, the third transistor Q3 may be an NMOS transistor, and the fourth transistor Q4 may be a PMOS transistor. The first conducting end of the third switch tube Q3 is the drain of the NMOS tube, the second conducting end of the third switch tube Q3 is the source of the NMOS tube, and the control end of the third switch tube Q3 is the gate of the NMOS tube. The first conducting end of the fourth switching tube Q4 is a drain electrode of a PMOS tube, the second conducting end of the second switching tube Q2 is a source electrode of the PMOS tube, and the control end of the fourth switching tube Q4 is a gate electrode of the PMOS tube.
When the driving circuit 300 receives the stop signal, the third switching transistor Q3 is turned off and the fourth switching transistor Q4 is turned on, and the voltage at the output terminal of the driving circuit 300 is the ground voltage of the second ground reference GND 2. When the driving circuit 300 receives the output signal, the third switching transistor Q3 is turned on and the fourth switching transistor Q4 is turned off, and at this time, the voltage output by the output terminal of the driving circuit 300 is the driving voltage provided by the second power source VCC.
As shown in fig. 2, in the present embodiment, the driving circuit 300 further includes an output voltage dividing resistor R5; the output voltage-dividing resistor R5 is connected in series to the output terminal of the driving circuit 300, and the output voltage-dividing resistor R5 is used for adjusting the voltage output by the driving circuit 300 and avoiding the direct connection of the power-consuming device to the second power source VCC.
As shown in fig. 2, in the present embodiment, the first isolation circuit 100 further includes a driving resistor R6 and a third voltage dividing resistor R7; the driving resistor R6 is connected in series between the first power supply and the control end of the first switch tube Q1; the third voltage dividing resistor R7 is connected in series between the control terminal of the first switch Q1 and the first ground reference GND 1.
A second embodiment of the present application provides an electronic device, which includes a first power supply VCC and a second power supply VCC, and an isolated voltage driving circuit as in the above embodiments connected to the first power supply VCC and the second power supply VCC.
The electronic device disclosed in this embodiment may be an energy storage device or other electronic devices having an energy storage structure, and the embodiment of this application does not limit the specific kind of the electronic device.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present application, and they should be construed as being included in the present application.
Claims (10)
1. An isolated voltage drive circuit for switching control of a second power supply using first power supply isolation, the isolated voltage drive circuit comprising:
the first isolation circuit is used for being connected with the first power supply, and the first isolation circuit is used for isolating a drive enabling signal input by the first power supply and then outputting a drive signal;
the second isolation circuit is connected with the first isolation circuit and used for outputting a switch control signal according to the driving signal; and
and the driving circuit is connected with the second isolation circuit and used for switching according to the switching control signal so as to control the switching of the second power supply.
2. The isolated voltage driving circuit of claim 1, wherein the first isolation circuit comprises a first voltage divider circuit, a second voltage divider circuit, and a third voltage divider circuit, wherein a first terminal of the third voltage divider circuit is connected to the second isolation circuit, and wherein a second terminal of the third voltage divider circuit is connected to the first terminal of the first voltage divider circuit and the first terminal of the second voltage divider circuit, respectively; the second end of the first voltage division circuit is connected with a second reference ground; the controlled end of the first voltage division circuit is connected with the first power supply; a second end of the second voltage division circuit is connected with the second reference ground, and an output end of the second voltage division circuit is connected with a controlled end of the second isolation circuit; the first voltage division circuit is used for being switched on or switched off according to the driving enabling signal so as to output the driving signal at the output end of the second voltage division circuit.
3. The isolated voltage driving circuit according to claim 2, wherein the first voltage dividing circuit comprises a first one-way conductor, a first switch tube, a second one-way conductor and a first voltage regulating resistor connected in series in sequence; the positive electrode of the first unidirectional conductor is connected with the second end of the third voltage division circuit, the negative electrode of the first unidirectional conductor is connected with the first conducting end of the first switch tube, the second conducting end of the first switch tube is connected with the positive electrode of the second unidirectional conductor, the negative electrode of the second unidirectional conductor is connected with the first end of the first voltage regulation resistor, and the second end of the first voltage regulation resistor is connected with the second reference ground; the second conducting end of the first switch tube is also connected with a first reference ground, and the control end of the first switch tube is connected with the controlled end of the first voltage division circuit.
4. The isolated voltage driver circuit of claim 3, wherein the third voltage divider circuit comprises a first voltage divider resistor; the first end of the first divider resistor is connected with the second isolation circuit; the second end of the first voltage-dividing resistor is connected with the first end of the first voltage-dividing circuit;
the second voltage division circuit comprises a third one-way conductor and a second voltage regulation resistor which are sequentially connected in series; the positive electrode of the third unidirectional conductor is connected with the second end of the third voltage-dividing circuit, the negative electrode of the third unidirectional conductor is connected with the first end of the second voltage-regulating resistor, and the second end of the second voltage-regulating resistor is connected with the second reference ground; and the first end of the second voltage regulating resistor is connected with the output end of the second voltage dividing circuit.
5. The isolated voltage driving circuit of any one of claims 2 to 4, wherein the second isolation circuit comprises a second voltage-dividing resistor and a second switching tube; a first end of the second voltage-dividing resistor is connected to the driving circuit, a second end of the second voltage-dividing resistor is connected to a first conduction end of the second switching tube, a control end of the second switching tube is connected to an output end of the second voltage-dividing circuit, the control end of the second switching tube is used as a controlled end of the second isolation circuit, and a second conduction end of the second switching tube is connected to the second reference ground; the first conducting end of the second switch tube is connected with the control end of the driving circuit, and the second switch tube is used for outputting the switch control signal to the driving circuit according to the driving signal.
6. An isolated voltage driving circuit according to any of claims 1 to 4, wherein the driving circuit comprises a third switching tube and a fourth switching tube; the first conducting end of the third switching tube is connected with the second power supply, the second conducting end of the third switching tube is the output end of the driving circuit and is connected with the first conducting end of the fourth switching tube, and the second conducting end of the fourth switching tube is connected with a second reference ground;
and the control end of the third switching tube and the control end of the fourth switching tube are both connected with the control end of the driving circuit.
7. The isolated voltage driver circuit of claim 6, wherein the driver circuit further comprises an output voltage dividing resistor; the output voltage-dividing resistor is connected in series with the output end of the drive circuit.
8. The isolated voltage driver circuit of claim 3, wherein the first isolation circuit further comprises a driver resistor and a third voltage divider resistor; the driving resistor is connected between the first power supply and the control end of the first switching tube in series; the third voltage dividing resistor is connected in series between the control end of the first switch tube and the first reference ground.
9. The isolated voltage driver circuit of claim 4, wherein the second voltage divider circuit further comprises a fourth one-way conductor connected in series between the third one-way conductor and the second voltage regulator resistor, wherein an anode of the fourth one-way conductor is connected to a cathode of the third one-way conductor, and a cathode of the fourth one-way conductor is connected to the first end of the second voltage regulator resistor; the resistance values of the second voltage regulating resistor and the first voltage regulating resistor are equal, and the conduction voltage drops of the first one-way conductor, the second one-way conductor, the third one-way conductor and the fourth one-way conductor are equal.
10. An electronic device comprising a first power supply and a second power supply, and the isolated voltage driver circuit of any one of claims 1-9 connected to the first power supply and the second power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202123321189.9U CN216819693U (en) | 2021-12-27 | 2021-12-27 | Isolation voltage driving circuit and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123321189.9U CN216819693U (en) | 2021-12-27 | 2021-12-27 | Isolation voltage driving circuit and electronic device |
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| CN216819693U true CN216819693U (en) | 2022-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123321189.9U Active CN216819693U (en) | 2021-12-27 | 2021-12-27 | Isolation voltage driving circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216819693U (en) |
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2021
- 2021-12-27 CN CN202123321189.9U patent/CN216819693U/en active Active
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