CN219760865U - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN219760865U CN219760865U CN202320238439.2U CN202320238439U CN219760865U CN 219760865 U CN219760865 U CN 219760865U CN 202320238439 U CN202320238439 U CN 202320238439U CN 219760865 U CN219760865 U CN 219760865U
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- 239000003990 capacitor Substances 0.000 claims description 108
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- 230000002441 reversible effect Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 10
- 230000002829 reductive effect Effects 0.000 description 9
- 230000000670 limiting effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a power supply circuit for a multi-axis analog quantity generator, which comprises: the power supply system comprises a power supply interface module, a linear voltage stabilizing module, a voltage conversion module and a power supply interface module, wherein a first end of the power supply interface module is connected with a direct current power supply and used for inputting direct current power supply voltage; the input end of the linear voltage stabilizing module is connected with the second end of the power interface module and is used for converting the direct current power supply voltage into a first direct current voltage and a second direct current voltage; the first end of the voltage conversion module is connected with the first output end of the linear voltage stabilizing module and is used for converting the first direct-current voltage into a third direct-current voltage; the first input end of the power supply interface module is connected with the second output end of the linear voltage stabilizing module and used for inputting a second direct-current voltage, and the second input end of the power supply interface module is used for inputting a third direct-current voltage. The power supply circuit can inhibit ripple waves in the output voltage, and can enable the multi-axis analog quantity generator to output voltage analog quantities in different ranges.
Description
Technical Field
The utility model relates to the technical field of power supply, in particular to a power supply circuit.
Background
The multi-axis analog generator needs to output voltage analog quantity lower, for example 5V or 10V, and the voltage difference between the external power supply of the power supply circuit of the existing multi-axis analog generator and the output voltage of the voltage stabilizer is large.
In the prior art, when the quiescent current in the power supply circuit of the voltage stabilizer is overlarge, the consumed power is easy to be high, the efficiency of the voltage stabilizer is influenced, the heating problem can be caused, and the ripple exists in the power supply voltage, so that the voltage quality for supplying power to the multi-axis analog quantity generator is lower.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a power supply circuit capable of suppressing ripple in an output voltage, reducing an influence of the ripple on power supply to a load, and enabling a multi-axis analog quantity generator to output voltage analog quantities in different ranges.
In order to achieve the above object, an embodiment of a first aspect of the present utility model provides a power supply circuit for a multi-axis analog quantity generator, including: the first end of the power interface module is connected with the direct current power supply and is used for inputting direct current power supply voltage; the input end of the linear voltage stabilizing module is connected with the second end of the power interface module and is used for converting the direct-current power supply voltage into a first direct-current voltage and a second direct-current voltage; the first end of the voltage conversion module is connected with the first output end of the linear voltage stabilizing module and is used for converting the first direct-current voltage into a third direct-current voltage, wherein the third direct-current voltage is a reverse voltage of the first direct-current voltage; the first input end of the power supply interface module is connected with the second output end of the linear voltage stabilizing module and used for inputting the second direct-current voltage, and the second input end of the power supply interface module is connected with the second end of the voltage converting module and used for inputting the third direct-current voltage.
According to the power supply circuit provided by the embodiment of the utility model, the linear voltage stabilizing module is arranged to convert the direct current power supply voltage into the first direct current voltage and the second direct current voltage, so that the voltage provided by the external direct current power supply is regulated in a rising/falling way, the range of the output voltage of the external direct current power supply is enlarged, the linear voltage stabilizing module can output the stable voltage for supplying power to the load, the ripple wave in the output voltage is restrained, and the influence of the ripple wave on the power supply of the load is reduced. And the linear voltage stabilizing module is directly connected with the power supply interface module, so that the linear voltage stabilizing module can directly provide forward output voltage for a load. The voltage conversion module can bias the voltage output by the linear voltage stabilizing module into reverse voltage and output the reverse voltage to the power supply interface module, and the power supply interface module is connected with the output end of the linear voltage stabilizing module and the output end of the voltage conversion module, so that the multi-axis analog quantity generator can output voltage analog quantities in different ranges.
In some embodiments of the utility model, the linear voltage regulator module comprises: the input end of the first linear voltage stabilizing chip is connected with the second end of the power interface module, and the output end of the first linear voltage stabilizing chip is connected with the first end of the voltage conversion module and is used for converting the direct current power supply voltage into the first direct current voltage; the first end of the first bypass protection circuit is connected with the input end of the first linear voltage stabilizing chip and the second end of the power interface module, and the second end of the first bypass protection circuit is grounded; the input end of the second linear voltage stabilizing chip is connected with the input end of the first linear voltage stabilizing chip, the second end of the power interface module and the first end of the first bypass protection circuit, and the output end of the second linear voltage stabilizing chip is connected with the first input end of the power supply interface module and is used for converting the direct current power supply voltage into the second direct current voltage; the first end of the second bypass protection circuit is connected with the input end of the second linear voltage stabilizing chip, the second end of the power interface module, the input end of the first linear voltage stabilizing chip and the first end of the first bypass protection circuit, and the second end of the second bypass protection circuit is grounded.
In some embodiments of the utility model, the first bypass protection circuit comprises: the first end of the first capacitor is connected with the first end of the second capacitor and the first end of the third capacitor to serve as the first end of the first bypass protection circuit, and the second end of the first capacitor is connected with the second end of the second capacitor and the second end of the third capacitor to serve as the second end of the first bypass protection circuit; the second bypass protection circuit includes: the first end of the fourth capacitor is connected with the first end of the fifth capacitor and the first end of the sixth capacitor to serve as the first end of the first bypass protection circuit, and the second end of the fourth capacitor is connected with the second end of the fifth capacitor and the second end of the sixth capacitor to serve as the second end of the second bypass protection circuit.
In some embodiments of the utility model, the linear voltage regulator module further comprises: the first end of the first decoupling circuit is connected with the output end of the first linear voltage stabilizing chip and the first end of the voltage conversion module, and the second end of the first decoupling circuit is grounded; and the first end of the second decoupling circuit is connected with the output end of the second linear voltage stabilizing chip and the first input end of the power supply interface module, and the second end of the second decoupling circuit is grounded.
In some embodiments of the utility model, the voltage conversion module comprises: the input end of the DCDC chip is connected with the output end of the first linear voltage stabilizing chip, the output end of the DCDC chip is connected with the second input end of the power supply interface module, and the DCDC chip is used for converting the first direct-current voltage into the third direct-current voltage; and the first end of the feedback voltage dividing circuit is connected with a feedback pin of the DCDC chip, the second end of the feedback voltage dividing circuit is connected with an output end of the DCDC chip, and the feedback voltage dividing circuit is used for feeding the output third direct current voltage back to the feedback pin.
In some embodiments of the utility model, the feedback voltage divider circuit comprises: the first end of the first resistor is connected with the output end of the DCDC chip, and the second end of the first resistor is connected with the feedback pin of the DCDC chip; the first end of the second resistor is connected with the first end of the first resistor and the output end of the DCDC chip; a seventh capacitor, wherein a first end of the seventh capacitor is connected with a second end of the second resistor, and a second end of the seventh capacitor is connected with a second end of the first resistor and a feedback pin of the DCDC chip; a third resistor, the first end of the third resistor is connected with the second end of the seventh capacitor, the second end of the first resistor and the feedback pin of the DCDC chip, and the second end of the third resistor is connected with the VREF pin of the DCDC chip.
In some embodiments of the utility model, the power interface module comprises: the first power supply interface is connected with the second output end of the linear voltage stabilizing module through a fourth resistor and used for inputting the second direct-current voltage, the second pin of the first power supply interface is grounded, and the third pin of the first power supply interface is connected with the second end of the voltage converting module through a fifth resistor and used for inputting the third direct-current voltage; the first pin of the second power supply interface is connected with the second output end of the linear voltage stabilizing module through a sixth resistor and is used for inputting the second direct-current voltage, the second pin of the second power supply interface is grounded, and the third pin of the second power supply interface is connected with the second end of the voltage converting module through a seventh resistor and is used for inputting the third direct-current voltage; the first pin of the third power supply interface is connected with the second output end of the linear voltage stabilizing module through an eighth-fifth resistor and used for inputting the second direct-current voltage, the second pin of the third power supply interface is grounded, and the third pin of the third power supply interface is connected with the second end of the voltage converting module through a ninth resistor and used for inputting the third direct-current voltage.
In some embodiments of the utility model, the first power supply interface, the second power supply interface, and the third power supply interface are connected in parallel.
In some embodiments of the utility model, the dc supply voltage ranges from 5V to 24V, the first dc voltage ranges from 1.8V to 5.7V, the second dc voltage ranges from 1.8V to 5.7V, and the third dc voltage ranges from-10V to 10V.
In some embodiments of the utility model, the power interface module comprises: the power supply interface is used for being connected with the direct-current power supply; and the switch unit is connected with the power interface and the linear voltage stabilizing module and is used for controlling the power supply state of the power supply circuit.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic diagram of a structure of a power supply circuit according to an embodiment of the present utility model;
fig. 2 is a schematic diagram of a structure of a power supply circuit according to another embodiment of the present utility model;
FIG. 3 is a circuit diagram of a linear voltage regulator module according to one embodiment of the present utility model;
FIG. 4 is a circuit diagram of a voltage conversion module according to one embodiment of the utility model;
fig. 5 is a circuit diagram of a power interface module according to one embodiment of the utility model.
Drawing figures marking:
a power supply circuit 10 and a DC power supply 20;
the power supply device comprises a power interface module 1, a linear voltage stabilizing module 2, a voltage conversion module 3 and a power supply interface module 4;
the power supply interface 11, the switch unit 12, the first linear voltage stabilizing chip 21, the first bypass protection circuit 22, the second linear voltage stabilizing chip 24, the second bypass protection circuit 25, the first decoupling circuit 23, the second decoupling circuit 26, the DCDC chip 31 and the feedback voltage dividing circuit 32;
the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the capacitor Cn, the capacitor Cm, the first resistor R1, the second resistor R2, the third resistor R3, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10, the eleventh capacitor C11, the twelfth capacitor C12, the thirteenth capacitor C13, the schottky diode D1, the first power supply interface 41, the second power supply interface 42, the third power supply interface 43, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10.
Detailed Description
Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.
A power supply circuit according to an embodiment of the present utility model is described below with reference to fig. 1 to 5.
In some embodiments of the present utility model, the power supply circuit 10 is used for a multi-axis analog quantity generator, as shown in fig. 1, and is a block diagram of the power supply circuit according to one embodiment of the present utility model, wherein the power supply circuit 10 includes a power interface module 1, a linear voltage stabilizing module 2, a voltage converting module 3, and a power interface module 4. The first end of the power interface module 1 is connected to the dc power supply 20 for inputting a dc supply voltage. Wherein the dc power source 20 may be used to provide 5V-24V dc power.
Specifically, in some embodiments, as shown in fig. 2, a block diagram of a power supply circuit according to another embodiment of the present utility model is shown, where the power interface module 1 includes a power interface 11 and a switch unit 12, where the power interface 11 may be a power plug with a hardware structure for connecting with the dc power supply 20, and is used for inputting a dc power supply voltage of 5V-24V. The switching unit 12 may be configured as a hardware switch, and the switching unit 12 is connected to the power interface 11 and the linear voltage stabilizing module 2, for controlling the power supply state of the power supply circuit 10. For example, when the switch is in the open state, the power supply circuit 10 is not energized, and the dc power supply 20 can provide a stable dc power supply voltage to the linear voltage stabilizing module 2 after the switch is closed.
The input end of the linear voltage stabilizing module 2 is connected with the second end of the power interface module 1, and the linear voltage stabilizing module 2 is used for converting the direct current power supply voltage into a first direct current voltage and a second direct current voltage. The first direct current voltage and the second direct current voltage can be equal, and the first direct current voltage and the second direct current voltage are used for providing the load with stable voltage, so that ripple interference in the power supply process can be reduced.
When the power supply circuit works normally, the dc supply voltage is input to the linear voltage stabilizing module 2, and the range of the output voltage of the external dc power supply 20 is enlarged by converting the dc supply voltage into the first dc voltage and the second dc voltage, and when the voltage output by the dc power supply 20 is lower, the multi-axis analog generator can still output a higher voltage analog. For example, the output voltage of the linear voltage stabilizing module 2 is greater than the maximum voltage provided by the dc power supply 20, that is, the first dc voltage and the second dc voltage are greater than the dc supply voltage. The linear voltage stabilizing module 2 can output voltage analog quantities in different ranges by carrying out step-up/step-down adjustment on the voltage provided by the external direct current power supply 20, so that the voltage stabilizing module can stabilize the voltage for supplying power to a load, can inhibit ripple waves generated by the direct current power supply 20 and reduce ripple interference.
In some embodiments, the first end of the voltage conversion module 3 is connected to the first output end of the linear voltage stabilizing module 2, for converting the first dc voltage into the third dc voltage, where the voltage conversion module 3 is configured to bias the input voltage into an inverted voltage and output the inverted voltage, that is, the output third dc voltage is the inverted voltage of the input first dc voltage.
The first input end of the power supply interface module 4 is connected with the second output end of the linear voltage stabilizing module 2 and is used for inputting a second direct current voltage, and the input end of the power supply interface module 4 is connected with the second end of the voltage converting module 3 and is used for inputting a third direct current voltage. The second direct voltage is forward voltage, the third direct voltage is reverse voltage, and the power supply interface module 4 is connected with the output end of the linear voltage stabilizing module 2 and the output end of the voltage conversion module 3, so that the second direct voltage and the third direct voltage can be input at the same time, and the multi-axis analog quantity generator can output voltage analog quantities in different ranges. For example, the voltage analog ranges may include-10V-0V, 0V-10V, -5V-0V, 0V-5V, -2.5V-0V, 0V-2.5V, -1V-0V, 0V-1V, etc., without specific limitation herein.
According to the power supply circuit 10 provided by the embodiment of the utility model, the linear voltage stabilizing module 2 is arranged to convert the direct current power supply voltage into the first direct current voltage and the second direct current voltage, so that the voltage provided by the external direct current power supply 20 is regulated in a rising/falling manner, the range of the output voltage of the external direct current power supply 20 is enlarged, the linear voltage stabilizing module 2 can output a stable voltage for supplying power to a load, the ripple wave in the output voltage is restrained, and the influence of the ripple wave on the power supply of the load is reduced. And, the linear voltage stabilizing module 2 is directly connected with the power supply interface module 4, so that the forward output voltage can be directly provided for a load. The voltage conversion module 3 can bias the voltage output by the linear voltage stabilizing module 2 into reverse voltage and output the reverse voltage to the power supply interface module 2, and the power supply interface module 4 is connected with the output end of the linear voltage stabilizing module 2 and the output end of the voltage conversion module 3, so that the multi-axis analog quantity generator can output voltage analog quantities in different ranges.
In some embodiments of the present utility model, as shown in fig. 2, a block diagram of a power supply circuit according to another embodiment of the present utility model is shown, where the linear voltage regulator module 2 includes a first linear voltage regulator chip 21, a first bypass protection circuit 22, a second linear voltage regulator chip 24, and a second bypass protection circuit 25.
In particular, the linear voltage stabilizing module 2 of the embodiment of the present utility model can be understood in conjunction with fig. 2 and 3. Fig. 3 is a circuit diagram of a linear voltage regulator module according to one embodiment of the present utility model.
As shown in fig. 3, an input end of the first linear voltage stabilizing chip 21 is connected to the second end of the power interface module 1, and an output end of the first linear voltage stabilizing chip 21 is connected to the first end of the voltage converting module 3, for converting the dc supply voltage into a first dc voltage. The input end of the second linear voltage stabilizing chip 24 is connected with the input end of the first linear voltage stabilizing chip 21, the second end of the power interface module 1 and the first end of the first bypass protection circuit 22, and the output end of the second linear voltage stabilizing chip 24 is connected with the first input end of the power interface module 4 and is used for converting the direct current power supply voltage into a second direct current voltage.
Specifically, the input end of the first linear voltage stabilizing chip 21, i.e. the IN pin, and the input end of the second linear voltage stabilizing chip 24, i.e. the IN pin, are both connected with the bat+ end of the power interface, i.e. the positive pole of the dc power supply 20, and the first linear voltage stabilizing chip 21 and the second linear voltage stabilizing chip 24 can both adopt linear voltage stabilizing chips with low quiescent current, so that the self power consumption can be effectively reduced, and the power efficiency is improved. For example, the first linear voltage stabilizing chip 21 and the second linear voltage stabilizing chip 24 can be selected from PW6206 chips, and the input voltage of the linear voltage stabilizing chips ranges from 4.75V to 40V; the output voltage ranges from 1.8V to 5.7V, namely the range of the first direct current voltage is 1.8V to 5.7V, and the range of the second direct current voltage is 1.8V to 5.7V; the output current is 150mA (typical value) up to 300mA; when the output end of the linear voltage stabilizing chip, namely the current output by the OUT pin is 100mA, the self voltage drop of the linear voltage stabilizing chip is 600mV; when the direct current supply voltage input by the IN pin is 12V, the quiescent current of the linear voltage stabilizing chip is 4.2uA. The quiescent current of the linear voltage stabilizing chip is very low, the self power consumption is small, full-amplitude output can be basically realized, and the efficiency of the direct current power supply 20 can be greatly improved.
Further, the output voltages of the first linear voltage stabilizing chip 21 and the second linear voltage stabilizing chip 24 are larger than the maximum voltage provided by the dc power supply, when the power supply circuit works normally, the voltages output by the output end and the output end of the linear voltage stabilizing chip are the difference between the dc power supply voltage and the self voltage drop, and when the self voltage drop of the selected linear voltage stabilizing chip is lower, the first dc voltage and the second dc voltage are approximately equal to the dc power supply voltage, so that the working efficiency of the linear voltage stabilizing chip is improved. And by adopting the linear voltage stabilizing chip with low quiescent current, the power consumption of the linear voltage stabilizing module 2 can be reduced, the heat generation is reduced, the output voltage precision is improved, the ripple wave in the output voltage is restrained, and the influence of the ripple wave on the power supply of a load is reduced.
The first bypass protection circuit 22 is used as a bypass protection circuit of the first linear voltage stabilizing chip 21, a first end of the first bypass protection circuit 22 is connected with an input end of the first linear voltage stabilizing chip 21 and a second end of the power interface module 1, and a second end of the first bypass protection circuit 22 is grounded.
Specifically, as shown in fig. 3, the first bypass protection circuit 22 includes a first capacitor C1, a second capacitor C2, and a third capacitor C3, where a first end of the first capacitor C1 is connected to a first end of the second capacitor C2 and a first end of the third capacitor C3 to serve as a first end of the first bypass protection circuit 22, and a second end of the first capacitor C1 is connected to a second end of the second capacitor C2 and a second end of the third capacitor C3 to serve as a second end of the first bypass protection circuit 22. That is, the first capacitor C1, the second capacitor C2 and the third capacitor C3 are connected IN parallel to form a bypass protection circuit of the first linear voltage stabilizing chip 21, and the first bypass protection circuit 22 is connected to the input terminal of the first linear voltage stabilizing chip 21, i.e. the IN pin and the GND pin.
The first end of the second bypass protection circuit 25 is connected to the input end of the second linear voltage stabilizing chip 24, the second end of the power interface module 1, the input end of the first linear voltage stabilizing chip 21, and the first end of the first bypass protection circuit 22, and the second end of the second bypass protection circuit 25 is grounded.
Specifically, as shown in fig. 3, the second bypass protection circuit 25 includes a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6, where a first end of the fourth capacitor C4 is connected to a first end of the fifth capacitor C5 and a first end of the sixth capacitor C6 to serve as a first end of the second bypass protection circuit 25, and a second end of the fourth capacitor C4 is connected to a second end of the fifth capacitor C5 and a second end of the sixth capacitor C6 to serve as a second end of the second bypass protection circuit 25.
That is, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are connected IN parallel to form a bypass protection circuit of the second linear voltage stabilizing chip 23, and the second bypass protection circuit 25 is connected to the input terminal of the second linear voltage stabilizing chip 23, i.e. the IN pin and the GND pin.
Based on the above, by providing the first bypass protection circuit 22 and the second bypass protection circuit 25 and connecting with the IN pin and the GND pin of the two linear voltage stabilizing chips, respectively, high frequency noise on the dc power supply 20 can be filtered.
In other embodiments of the present utility model, as shown in fig. 2, the linear voltage stabilizing module 2 further includes a first decoupling circuit 23 and a second decoupling circuit 26.
The first end of the first decoupling circuit 23 is connected to the output end of the first linear voltage stabilizing chip 21 and the first end of the voltage conversion module 3, and the second end of the first decoupling circuit 23 is grounded. Specifically, as shown in fig. 3, the first decoupling circuit 23 is composed of a capacitor Cm connected to the output terminal of the first linear voltage regulator chip 21, that is, the OUT pin and the GND pin. A first end of the second decoupling circuit 26 is connected to the output of the second linear voltage regulator chip 24 and to the first input of the power supply interface module 4, and a second end of the second decoupling circuit 26 is grounded. Specifically, as shown in fig. 3, the second decoupling circuit 26 is composed of a capacitor Cn, and the capacitor Cn is connected to the output terminal of the second linear voltage stabilizing chip 23, that is, the OUT pin and the GND pin.
Based on the above, by setting the first decoupling circuit 23 and the second decoupling circuit 26, the capacitor Cm and the capacitor Cn can be used as energy storage capacitors, respectively, for reducing noise generated when the first linear voltage stabilizing chip 21 and the second linear voltage stabilizing chip 24 work to interfere with the power supply, or inhibiting the power supply from generating fluctuation, so as to improve the voltage output quality. Therefore, by arranging the bypass protection circuit and the decoupling circuit, high-frequency noise of the direct-current power supply 20 can be effectively filtered, noise generated by the operation of the linear voltage stabilizing chip can be reduced, and the voltage output quality is improved.
Further, the first linear voltage stabilizing chip 21 and the second linear voltage stabilizing chip 24 may also be selected from linear voltage stabilizing chips including a short-circuit protection unit, a current limiting protection unit, and an overheat protection unit (not shown). The short-circuit protection unit can realize a short-circuit protection function on the power supply interface; the current limiting protection unit can realize a current limiting protection function for the power supply interface, and when the output current of the interface exceeds the maximum output current, a switch in the linear voltage stabilizing chip is disconnected to stop the output of an external power supply; the overheat protection unit can protect the heat of the linear voltage stabilizing chip when the heat exceeds a heat preset value. Through the short-circuit protection unit, the current-limiting protection unit and the overheat protection unit in the linear voltage-stabilizing chip, the safety of the power supply circuit can be improved in all aspects.
Furthermore, the linear voltage stabilizing module 2 of the present embodiment can be directly connected with the external dc power supply 20 through the power interface module 1, so as to directly convert the dc power supply voltage into the first dc voltage and the second dc voltage, without setting a sampling resistor and an AD converter, and can improve the response speed of the output short-circuit protection.
In some embodiments of the present utility model, as shown in fig. 2, the voltage conversion module 3 includes a DCDC chip 31 and a feedback voltage dividing circuit 32.
In particular, the voltage conversion module 3 of the embodiment of the present utility model can be understood in conjunction with fig. 2 and 4, and fig. 4 is a circuit diagram of the voltage conversion module according to one embodiment of the present utility model.
As shown in fig. 2, an input end of the DCDC chip 31 is connected to an output end of the first linear voltage stabilizing chip 21, an output end of the DCDC chip 31 is connected to an input end of the power supply interface module 4, and the DCDC chip 31 is configured to convert the first dc voltage into a third dc voltage and output the third dc voltage to the power supply interface module 4. It will be appreciated that the third dc voltage is a reverse voltage of the first dc voltage, for example, the input first dc voltage is +5v, and the output third dc voltage is-5V, so that when the second dc voltage and the third dc voltage are input to the power supply interface module 4, the voltage of-5V can be provided to the multi-axis analog generator, preferably the DCDC chip 31, and the forward voltage is converted into the reverse voltage by the voltage conversion module 3, so that the power supply circuit 10 can provide a larger range of forward and reverse input voltages for the multi-axis analog generator.
For example, as shown in fig. 4, the DCDC chip 31 may be a Tps63700 chip, where the Tps63700 chip is a reverse DC-DC converter capable of generating negative output voltages as low as-15V, and the DCDC chip 31 may be configured to output stable voltages of-2V-15V.
The first end of the feedback voltage dividing circuit 32 is connected with a feedback pin, FB pin, of the DCDC chip 31, the second end of the feedback voltage dividing circuit 32 is connected with an output end of the DCDC chip 31, and the feedback voltage dividing circuit 32 is configured to feedback the output third dc voltage to the feedback pin. Specifically, as shown in fig. 4, the feedback voltage dividing circuit 32 includes a first resistor R1, a second resistor R2, a seventh capacitor C7, and a third resistor R3.
The first end of the first resistor R1 is connected to the output end of the DCDC chip 31, and the second end of the first resistor R1 is connected to the feedback pin of the DCDC chip 31. The first end of the second resistor R2 is connected to the first end of the first resistor R1 and the output end of the DCDC chip 31. The first end of the seventh capacitor C7 is connected to the second end of the second resistor R2, and the second end of the seventh capacitor C7 is connected to the second end of the first resistor R1 and the feedback pin of the DCDC chip 31, where the seventh capacitor C7 is a feedforward capacitor, so that the control loop can be accelerated. The second resistor R can effectively limit the bandwidth and suppress the coupling noise. By connecting the second resistor R2 and the seventh capacitor C7 in series and connecting the second resistor R2 and the seventh capacitor C7 in parallel, the coupling noise can be effectively restrained and suppressed, and the quality of the output voltage can be improved. The third resistor R3 is connected in series with the first resistor R1, the first end of the third resistor R3 is connected with the second end of the seventh capacitor C7, the second end of the first resistor R1 and the feedback pin of the DCDC chip 31, and the second end of the third resistor R3 is connected with the VREF pin of the DCDC chip 31. The VREF pin is used for outputting a reference voltage.
Further, the voltage conversion module 3 of the embodiment of the present utility model further includes an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a tenth resistor R10, and a schottky diode D1.
Specifically, as shown in fig. 4, the eighth capacitor C8 is connected between the VIN pin of the DCDC chip 31 and the EN pin, which is an enable pin (en=gnd: disabled; en=vin: enabled), and ground, wherein the VIN pin of the DCDC chip 31 is an input pin, a first direct voltage input for controlling logic, and an RC circuit of 10R and 100nf is connected to filter the power voltage; one end of the ninth capacitor C9 is grounded, the other end of the ninth capacitor C9 is connected with the VREF pin of the DCDC chip 31 and the third resistor R3, and the ninth capacitor C9 can be a capacitor with a capacitance value of 220-nF; one end of the seventh capacitor C7 is connected with the third resistor R3, and the other end of the seventh capacitor C7 is connected with the feedback pin FB, the third resistor R3 and the first resistor R1 of the DCDC chip 31; the tenth capacitor C10 is connected between the first output end of the linear voltage stabilizing module 2 and the ground wire; the eleventh capacitor C11 and the twelfth capacitor C12 are connected in parallel between the output pin OUT of the DCDC chip 31 and the ground; the thirteenth capacitor C13 is connected between the COMP pin of the DCDC chip 31 and the ground, and the thirteenth capacitor C13 may select the COMP pin of the 4.7nF capacitor as the compensation pin for control; one end of a tenth resistor R10 is connected with the first output end of the linear voltage stabilizing module 2, and the other end of the tenth resistor R10 is connected with the VIN pin and the EN pin of the DCDC chip 31, wherein the tenth resistor R10 is a current limiting resistor; one end of the third resistor R3 is connected with the VREF pin of the DCDC chip 31 and the ninth capacitor C9, and the other end of the third resistor R3 is connected with the feedback pin FB, the first resistor R1 and the seventh capacitor C7; one end of the first resistor R1 is connected with the FB pin, the third resistor R3 and the seventh capacitor C7, and the other end of the first resistor R1 is connected with the output pin OUT of the DCDC chip 31 and the anode of the Schottky diode D1; the third resistor R3 is connected with the seventh capacitor C7 in series and connected with the first resistor R1 in parallel; the inductor L1 is disposed between the SW pin of the DCDC chip 31 and the ground, the SW pin is an inverting switch output pin, and the electric setting inductor L1 can be used for preventing the output current of the SW pin from suddenly changing; the cathode of the schottky diode D1 is connected with the SW pin of the DCDC chip 31, and the anode of the schottky diode D1 is connected with the output pin OUT of the DCDC chip 31, so that the reverse current can be prevented from being generated by arranging the schottky diode D1; the enable terminal of the DCDC chip 31, i.e., the EN pin, is connected to the first output terminal of the linear voltage regulator module 2 through a tenth resistor R10, and the ps_gnd pin and the GND pin of the DCDC chip 31 are grounded, wherein the ps_gnd pin is used to implement control logic when connected to the GND pin.
In some embodiments of the present utility model, as shown in fig. 5, a circuit of a power interface module according to one embodiment of the present utility model is shown.
Specifically, the power supply interface module 4 includes three parallel power supply interfaces, namely, a first power supply interface 41, a second power supply interface 42, and a third power supply interface 43. The first pin of the first power supply interface 41 is connected to the second output end of the linear voltage stabilizing module 2 through the fourth resistor R4, and is used for inputting a second direct current voltage, the second pin of the first power supply interface 41 is grounded, and the third pin of the first power supply interface 41 is connected to the second end of the voltage converting module 3 through the fifth resistor R5, and is used for inputting a third direct current voltage. The first pin of the second power supply interface 42 is connected with the second output end of the linear voltage stabilizing module 2 through a sixth resistor R6, and is used for inputting a second direct current voltage, the second pin of the second power supply interface 42 is grounded, and the third pin of the second power supply interface 42 is connected with the second end of the voltage converting module 3 through a seventh resistor R7, and is used for inputting a third direct current voltage. The first pin of the third power supply interface 43 is connected with the second output end of the linear voltage stabilizing module 2 through the eighth resistor R8, and is used for inputting the second direct current voltage, the second pin of the third power supply interface 43 is grounded, and the third pin of the third power supply interface 43 is connected with the second end of the voltage converting module 3 through the ninth resistor R9, and is used for inputting the third direct current voltage. The range of the third dc voltage is-10V, that is, the first pins of the first power supply interface 41, the second power supply interface 42, and the third power supply interface 43 are connected to the normal phase input of the multi-axis analog generator, the output of the maximum forward voltage is 10V, the second pins of the first power supply interface 41, the second power supply interface 42, and the third power supply interface 43 are connected to the reverse input of the multi-axis analog generator, and the output of the maximum reverse voltage is-10V. The power supply interface module 4 is connected with the output end of the linear voltage stabilizing module 2 and the output end of the voltage conversion module 3, and can simultaneously input a second direct current voltage and a third direct current voltage, so that the multi-axis analog quantity generator can output voltage analog quantities in different ranges.
Based on the above, the power supply circuit 10 provided by the embodiment of the utility model, the power interface module 1 can be externally connected with the 5V-24V direct current power supply 20, and by arranging the linear voltage stabilizing module 2, the quiescent current of the linear voltage stabilizing chip is very small, the energy loss of the linear voltage stabilizing chip in the whole power supply circuit 10 can be greatly reduced, the power supply efficiency is improved, and the voltage converting module 3 realizes the output of the inverse step-up/step-down.
Other configurations and operations of the power supply circuit 10 according to embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.
The terms "first," "second," and the like, 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 defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A power supply circuit for a multi-axis analog quantity generator, comprising:
the first end of the power interface module is connected with the direct current power supply and is used for inputting direct current power supply voltage;
the input end of the linear voltage stabilizing module is connected with the second end of the power interface module and is used for converting the direct-current power supply voltage into a first direct-current voltage and a second direct-current voltage;
the first end of the voltage conversion module is connected with the first output end of the linear voltage stabilizing module and is used for converting the first direct-current voltage into a third direct-current voltage, wherein the third direct-current voltage is a reverse voltage of the first direct-current voltage;
the first input end of the power supply interface module is connected with the second output end of the linear voltage stabilizing module and used for inputting the second direct-current voltage, and the second input end of the power supply interface module is connected with the second end of the voltage converting module and used for inputting the third direct-current voltage.
2. The power supply circuit of claim 1, wherein the linear voltage regulator module comprises:
the input end of the first linear voltage stabilizing chip is connected with the second end of the power interface module, and the output end of the first linear voltage stabilizing chip is connected with the first end of the voltage conversion module and is used for converting the direct current power supply voltage into the first direct current voltage;
the first end of the first bypass protection circuit is connected with the input end of the first linear voltage stabilizing chip and the second end of the power interface module, and the second end of the first bypass protection circuit is grounded;
the input end of the second linear voltage stabilizing chip is connected with the input end of the first linear voltage stabilizing chip, the second end of the power interface module and the first end of the first bypass protection circuit, and the output end of the second linear voltage stabilizing chip is connected with the first input end of the power supply interface module and is used for converting the direct current supply voltage into the second direct current voltage;
the first end of the second bypass protection circuit is connected with the input end of the second linear voltage stabilizing chip, the second end of the power interface module, the input end of the first linear voltage stabilizing chip and the first end of the first bypass protection circuit, and the second end of the second bypass protection circuit is grounded.
3. The power supply circuit of claim 2, wherein,
the first bypass protection circuit includes:
the first end of the first capacitor is connected with the first end of the second capacitor and the first end of the third capacitor to serve as the first end of the first bypass protection circuit, and the second end of the first capacitor is connected with the second end of the second capacitor and the second end of the third capacitor to serve as the second end of the first bypass protection circuit;
the second bypass protection circuit includes:
the first end of the fourth capacitor is connected with the first end of the fifth capacitor and the first end of the sixth capacitor to serve as the first end of the first bypass protection circuit, and the second end of the fourth capacitor is connected with the second end of the fifth capacitor and the second end of the sixth capacitor to serve as the second end of the second bypass protection circuit.
4. The power supply circuit of claim 3, wherein the linear voltage regulator module further comprises:
the first end of the first decoupling circuit is connected with the output end of the first linear voltage stabilizing chip and the first end of the voltage conversion module, and the second end of the first decoupling circuit is grounded;
and the first end of the second decoupling circuit is connected with the output end of the second linear voltage stabilizing chip and the first input end of the power supply interface module, and the second end of the second decoupling circuit is grounded.
5. The power supply circuit of claim 2, wherein the voltage conversion module comprises:
the input end of the DCDC chip is connected with the output end of the first linear voltage stabilizing chip, the output end of the DCDC chip is connected with the input end of the power supply interface module, and the DCDC chip is used for converting the first direct current voltage into the third direct current voltage;
and the first end of the feedback voltage dividing circuit is connected with a feedback pin of the DCDC chip, the second end of the feedback voltage dividing circuit is connected with an output end of the DCDC chip, and the feedback voltage dividing circuit is used for feeding the output third direct current voltage back to the feedback pin.
6. The power supply circuit of claim 5, wherein the feedback voltage divider circuit comprises:
the first end of the first resistor is connected with the output end of the DCDC chip, and the second end of the first resistor is connected with the feedback pin of the DCDC chip;
the first end of the second resistor is connected with the first end of the first resistor and the output end of the DCDC chip;
a seventh capacitor, wherein a first end of the seventh capacitor is connected with a second end of the second resistor, and a second end of the seventh capacitor is connected with a second end of the first resistor and a feedback pin of the DCDC chip;
and the first end of the third resistor is connected with the second end of the seventh capacitor, the second end of the first resistor and the feedback pin of the DCDC chip, and the second end of the third resistor is connected with the VREF pin of the DCDC chip.
7. The power supply circuit of claim 1, wherein the power supply interface module comprises:
a first power supply interface, a first pin of the first power supply interface is connected with a second output end of the linear voltage stabilizing module through a fourth resistor and is used for inputting the second direct current voltage, a second pin of the first power supply interface is grounded, and the first power supply interface is connected with the second output end of the linear voltage stabilizing module through a third resistor
A third pin of the first power supply interface is connected with the second end of the voltage conversion module through a fifth resistor and is used for inputting the third direct-current voltage;
the first pin of the second power supply interface is connected with the second output end of the linear voltage stabilizing module through a sixth resistor and is used for inputting the second direct-current voltage, the second pin of the second power supply interface is grounded, and the third pin of the second power supply interface is connected with the second end of the voltage converting module through a seventh resistor and is used for inputting the third direct-current voltage;
the first pin of the third power supply interface is connected with the second output end of the linear voltage stabilizing module through an eighth-fifth resistor and used for inputting the second direct-current voltage, the second pin of the third power supply interface is grounded, and the third pin of the third power supply interface is connected with the second end of the voltage converting module through a ninth resistor and used for inputting the third direct-current voltage.
8. The power supply circuit of claim 7, wherein the first power supply interface, the second power supply interface, and the third power supply interface are connected in parallel.
9. The power supply circuit of claim 1, wherein the dc supply voltage is in the range of 5V-24V, the first dc voltage is in the range of 1.8V-5.7V, the second dc voltage is in the range of 1.8V-5.7V, and the third dc voltage is in the range of-10V.
10. The power supply circuit of any one of claims 1-9, wherein the power interface module comprises:
the power supply interface is used for being connected with the direct-current power supply;
and the switch unit is connected with the power interface and the linear voltage stabilizing module and is used for controlling the power supply state of the power supply circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320238439.2U CN219760865U (en) | 2023-02-06 | 2023-02-06 | Power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320238439.2U CN219760865U (en) | 2023-02-06 | 2023-02-06 | Power supply circuit |
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| CN219760865U true CN219760865U (en) | 2023-09-26 |
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