CN212433648U - Voltage adjusting device, chip, power supply and electronic equipment - Google Patents
Voltage adjusting device, chip, power supply and electronic equipment Download PDFInfo
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- CN212433648U CN212433648U CN202020958975.6U CN202020958975U CN212433648U CN 212433648 U CN212433648 U CN 212433648U CN 202020958975 U CN202020958975 U CN 202020958975U CN 212433648 U CN212433648 U CN 212433648U
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Abstract
The utility model relates to a voltage adjusting device, chip, power and electronic equipment, the device includes: a voltage input module for receiving an input voltage; the current determining module is electrically connected with the voltage input module and used for determining the adjusting current according to the input voltage and the variation of the input voltage and the adjacent input voltage at the previous moment; the control module is electrically connected with the current determination module and used for outputting a control signal according to the adjusting current; and the voltage output module is electrically connected with the voltage input module, the current determination module and the control module and is used for outputting a target voltage according to the control signal and the input voltage. According to the utility model provides a voltage adjusting device can export stable target voltage, can have reliable, stable characteristics to input voltage's change quick response.
Description
Technical Field
The utility model relates to an integrated circuit field especially relates to a voltage adjusting device, chip, power and electronic equipment.
Background
In a power driving management chip of an AMOLED (Active-matrix organic light-emitting diode), there is a TDMA (Time division multiple access) test requirement: the input power is disturbed at intervals, jumping up or down by 500mV in 10 μ s, and the 500mV jump lasts at least 500 μ s. If such interference occurs, there must be an overshoot or an undershoot at the output of the Boost architecture of the DC-DC, which requires that the interference is less than 20mV under a load condition within 200mA and less than 60mV under a load condition within 1A.
However, in the related art, when the input power supply is disturbed, the change cannot be quickly tracked, and often the output voltage is disturbed by overshooting, undershooting and the like, so that the output voltage is unstable.
SUMMERY OF THE UTILITY MODEL
Technical problem
In view of this, the present invention is to solve the technical problem of how to output a stable target voltage.
Solution scheme
In order to solve the above technical problem, according to the utility model discloses an embodiment provides a voltage adjustment device, the device includes:
a voltage input module for receiving an input voltage;
the current determining module is electrically connected with the voltage input module and used for determining the adjusting current according to the input voltage and the variation of the input voltage and the adjacent input voltage at the previous moment;
the control module is electrically connected with the current determination module and used for outputting a control signal according to the adjusting current;
and the voltage output module is electrically connected with the voltage input module, the current determination module and the control module and is used for outputting a target voltage according to the control signal and the input voltage.
With regard to the above apparatus, in one possible implementation, the adjustment current comprises a first adjustment current, the current determination module comprises a first determination unit configured to determine the first adjustment current,
the first determination unit includes a first operational amplifier, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, and a first resistor, wherein,
the positive input end of the first operational amplifier is used for receiving the input voltage, the negative input end of the first operational amplifier is electrically connected with the source electrode of the first transistor and the first end of the first resistor, the output end of the first operational amplifier is electrically connected with the grid electrode of the first transistor, the second end of the first resistor is grounded,
a drain of the first transistor is electrically connected to a source of the second transistor, a gate of the second transistor, and a gate of the third transistor,
a drain of the second transistor and a drain of the third transistor are for receiving a supply voltage,
a source of the third transistor is electrically connected to a source of the fourth transistor, a gate of the fourth transistor, and a gate of the fifth transistor,
a source of the fourth transistor and a source of the fifth transistor are grounded,
the drain of the fifth transistor is used for outputting the first adjusting current.
With regard to the above-mentioned apparatus, in a possible implementation, the adjustment current comprises a second adjustment current, the current determination module comprises a second determination unit for determining the second adjustment current, the second determination unit comprises a current detection subunit, a multiplication subunit, a current determination subunit, wherein,
the current detection subunit is electrically connected to the voltage output module and is used for detecting load current and obtaining detection voltage according to the load current;
the multiplier subunit is electrically connected to the voltage output module and the voltage input module and is used for multiplying the input voltage and the detection voltage to obtain an intermediate voltage;
the current determining subunit is electrically connected to the multiplier subunit and configured to determine the second adjustment current according to the intermediate voltage.
For the above device, in one possible implementation, the current detection subunit includes a sixth transistor, a seventh transistor, a second operational amplifier, a second resistor, and a first capacitor, wherein,
a gate of the sixth transistor is configured to receive the control signal, a drain of the sixth transistor is electrically connected to the voltage input module, a source of the sixth transistor is electrically connected to the positive input terminal of the second operational amplifier and the drain of the seventh transistor,
the negative input end of the second operational amplifier is electrically connected to the voltage output module, the output end of the second operational amplifier is electrically connected to the grid electrode of the seventh transistor, the source electrode of the seventh transistor is electrically connected to the first end of the second resistor and the first end of the first capacitor,
a second terminal of the second resistor and a second terminal of the first capacitor are grounded,
the first end of the second resistor is used for outputting the detection voltage.
With regard to the above apparatus, in one possible implementation, the voltage output module includes an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a third operational amplifier, a third resistor, a fourth resistor, and a second capacitor, wherein,
a gate of the eighth transistor is electrically connected to the gate of the sixth transistor, the gate of the tenth transistor, and the control module, and is configured to receive the control signal,
a drain of the eighth transistor is electrically connected to a drain of the ninth transistor, a drain of the sixth transistor, a drain of the tenth transistor, and the voltage input module,
a source of the eighth transistor is electrically connected to the negative input terminal of the third operational amplifier, the negative input terminal of the second operational amplifier, the first end of the third resistor, and the first end of the second capacitor, a second end of the third resistor is electrically connected to the control module and the first end of the fourth resistor, a second end of the fourth resistor is grounded, and a second end of the second capacitor is grounded,
the gate of the ninth transistor is electrically connected to the control module for receiving the control signal, the source of the ninth transistor is grounded,
a positive input end of the third operational amplifier is electrically connected to a source of the tenth transistor and a drain of the eleventh transistor, an output end of the third operational amplifier is electrically connected to a gate of the eleventh transistor,
a source of the eleventh transistor is electrically connected to the current determination module and the control module, and a first end of the third resistor is configured to output the target voltage.
For the above apparatus, in one possible implementation, the voltage input module includes an input capacitor, an input inductor, wherein,
the first end of the input capacitor is electrically connected to the first end of the input inductor and is used for receiving the input voltage, the second end of the input capacitor is grounded,
a second end of the input inductor is electrically connected to the drain of the ninth transistor, the drain of the eighth transistor, the drain of the sixth transistor, and the drain of the tenth transistor.
In order to solve the above technical problem, according to another embodiment of the present invention, there is provided a chip, including:
the voltage adjusting device.
In order to solve the above technical problem, according to another embodiment of the present invention, there is provided a power supply including:
the chip is described.
In order to solve the above technical problem, according to another embodiment of the present invention, there is provided an electronic apparatus including:
the power supply.
In one possible implementation, the electronic device includes a display, a smartphone, or a portable device.
Through above device, the embodiment of the utility model provides an utilize the electric current to confirm the module basis input voltage reaches input voltage and the adjacent last moment's input voltage's variable quantity confirms the adjustment current, as long as input voltage changes, the module can quick response be confirmed to the electric current, exports control module with the adjustment current to produce control signal, voltage output module can be according to control signal, can not appear excessive overshoot, undershoot phenomenon to the stable target voltage of output. According to the utility model provides a voltage adjusting device can export stable target voltage, can have reliable, stable characteristics to input voltage's change quick response.
Other features and aspects of the present invention will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present invention and, together with the description, serve to explain the principles of the invention.
Fig. 1 shows a schematic diagram of a voltage regulating device according to an embodiment of the present invention.
Fig. 2 shows a schematic diagram of a voltage regulating device according to an embodiment of the present invention.
Fig. 3 shows a schematic diagram of a first determination unit according to an embodiment of the invention.
Fig. 4 shows a voltage variation diagram in a related art DC-DC architecture.
Fig. 5 is a schematic diagram illustrating a voltage variation in the voltage regulator according to an embodiment of the present invention.
Fig. 6 shows a schematic diagram of voltage change in the voltage adjustment device without using the second determination unit.
Fig. 7 shows a schematic diagram of a voltage change in the voltage adjustment apparatus using the second determination unit.
Detailed Description
Various exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating a voltage regulator according to an embodiment of the present invention.
As shown in fig. 1, the apparatus includes:
a voltage input module 10 for receiving an input voltage;
a current determining module 20, electrically connected to the voltage input module 10, for determining an adjustment current according to the input voltage and a variation of the input voltage between the input voltage and an adjacent previous input voltage;
a control module 30, electrically connected to the current determination module 20, for outputting a control signal according to the adjusted current;
and a voltage output module 40 electrically connected to the voltage input module 10, the current determination module 20 and the control module 30, and configured to output a target voltage according to the control signal and the input voltage.
Through above device, the embodiment of the utility model provides an utilize the electric current to confirm the module basis input voltage reaches input voltage and the adjacent last moment's input voltage's variable quantity confirms the adjustment current, as long as input voltage changes, the module can quick response be confirmed to the electric current, exports control module with the adjustment current to produce control signal, voltage output module can be according to control signal, can not appear excessive overshoot, undershoot phenomenon to the stable target voltage of output. According to the utility model provides a voltage adjusting device can export stable target voltage, can have reliable, stable characteristics to input voltage's change quick response.
The utility model provides a voltage adjusting device can include DC-DC converting circuit (direct current-direct current converting circuit), can be according to the stable, reliable target voltage of the direct current voltage output of input.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating a voltage regulator according to an embodiment of the present invention.
In a possible implementation, as shown in fig. 2, the adjustment current may include a first adjustment current Isink1, and the current determination module 20 may include a first determination unit 210, where the first determination unit 210 is configured to determine the first adjustment current.
Referring to fig. 3, fig. 3 is a schematic diagram of a first determining unit according to an embodiment of the present invention.
In one possible implementation, as shown in fig. 3, the first determining unit may include a first operational amplifier OP1, a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, and a first resistor R1, wherein,
a positive input terminal of the first operational amplifier OP1 is configured to receive the input voltage Vin, a negative input terminal of the first operational amplifier OP1 is electrically connected to the source of the first transistor Q1 and the first end of the first resistor, an output terminal of the first operational amplifier OP1 is electrically connected to the gate of the first transistor Q1, a second end of the first resistor R1 is grounded,
the drain of the first transistor Q1 is electrically connected to the source of the second transistor Q2, the gate of the second transistor Q2 and the gate of the third transistor Q3,
the drain of the second transistor Q2 and the drain of the third transistor Q3 are used to receive a supply voltage Vdd,
a source of the third transistor Q3 is electrically connected to the source of the fourth transistor Q4, the gate of the fourth transistor Q4 and the gate of the fifth transistor Q5,
the source of the fourth transistor Q4 and the source of the fifth transistor Q5 are grounded,
the drain of the fifth transistor Q5 is used to output the first regulated current Isink 1.
Through above device, the embodiment of the utility model provides a confirm first adjustment current Isink1 through first determining unit response to input voltage's change to compensate input voltage's change, and produce control signal, can make output voltage stable, when input voltage changes, reduce output voltage's volatility.
In one example, when Vin is changed by a variable of Δ Vin, when Vin is input to the first determining unit, a change Δ Isink1 of the first trim current Isink1 may be determined by the first determining unit to be gm1 × Δ Vin, where gm1 denotes a predetermined trim parameter, Vin denotes an input voltage, and "×" denotes a multiplication operation.
Thus, when the first adjustment current is input to the control module, the control module can compensate the change of the input voltage by using the first adjustment current and generate a control signal to adaptively adjust the magnitude of the output voltage, so that the fluctuation of the output voltage is small.
It should be noted that the embodiment of the present invention does not limit the specific size of gm1, and those skilled in the art can determine the specific size by means of simulation as needed.
With continuing reference to fig. 2, in a possible implementation, as shown in fig. 2, the adjustment current may further include a second adjustment current Isink2, the current determination module 2 may further include a second determination unit, the second determination unit is configured to determine the second adjustment current, the second determination unit may include a current detection subunit 220, a multiplier subunit 230, and a current determination subunit 240, wherein,
the current detection subunit 220 is electrically connected to the voltage output module, and is configured to detect a load current and obtain a detection voltage Vctrl according to the load current;
the multiplier subunit 230 is electrically connected to the voltage output module and the voltage input module, and configured to multiply the input voltage Vin and the detection voltage Vctrl to obtain an intermediate voltage;
the current determining subunit 240 is electrically connected to the multiplying subunit 230, and is configured to determine the second adjustment current Isink2 according to the intermediate voltage.
Through above device, the embodiment of the utility model provides a can respond to input voltage's change, control signal to make output voltage stable, and, through combining detection voltage and the input voltage that current detection subunit detected load current and obtained, control signal, can realize under the different load circumstances, the homoenergetic realizes the stable output of voltage.
In one possible implementation, as shown in fig. 2, the current detecting subunit 220 may include a sixth transistor Q6, a seventh transistor Q7, a second operational amplifier OP2, a second resistor R2, and a first capacitor C1, wherein,
the gate of the sixth transistor Q6 is used for receiving the control signal, the drain of the sixth transistor Q6 is electrically connected to the voltage input module, the source of the sixth transistor Q6 is electrically connected to the positive input terminal of the second operational amplifier OP2 and the drain of the seventh transistor Q7,
a negative input terminal of the second operational amplifier OP2 is electrically connected to the voltage output module, an output terminal of the second operational amplifier OP2 is electrically connected to a gate of the seventh transistor Q7, a source of the seventh transistor Q7 is electrically connected to a first end of the second resistor R2 and a first end of the first capacitor C1,
a second terminal of the second resistor R2 and a second terminal of the first capacitor C1 are grounded,
a first end of the second resistor R2 is configured to output the detection voltage Vctrl.
Through above device, the embodiment of the utility model provides a can realize the detection to load current through the current detection subunit to load current according to detecting the load current that obtains confirms detection voltage, and confirm the second adjustment current according to detection voltage, can compensate the change of load end, realize the control to control signal based on different load conditions.
In one example, in the detection, the current detection subunit may average the current of the eighth transistor at (1-D) T × IL, so as to obtain a detection voltage Vtrcl ═ T × IL R, where D denotes a duty ratio, T denotes a clock period, IL denotes an inductance of the input inductance L, and R denotes a resistance value of the second resistor R2.
The current detection subunit may convert the value of the load current into a detection voltage Vctrl ═ α × Id, where α denotes a preset parameter and Id denotes the load current.
In one example, the multiplier subunit may include an Analog multiplier (Analog Multiple), and the embodiment of the present invention does not limit the implementation manner of the multiplier, and one skilled in the art may implement the multiplier by using a dedicated hardware circuit or an existing Analog multiplier as needed.
The multiplier subunit outputs an intermediate voltage Vmul ═ β × Vctrl ═ Vin ═ α × β × Id · Vin, where β denotes a preset multiplication parameter.
In one example, the current determination subunit 240 outputs the second adjustment current Isink2 ═ gm2 ═ Vmul ═ gm2 ×. α ×. β ×. Id ·, where gm2 is a preset parameter of the current determination subunit.
In one example, the change in the regulated current output by the current determination module 20 may be represented as Δ Isink ═ Δ Isink1 +/Δ Isink2 ═ gm1 ═ Δ Vin + gm2 · α × β Id Vin ═ gm1+ gm2 · α × β Id) · Vin.
The implementation manner of the current determining subunit 240 may refer to the implementation manner of the first determining unit 210, and is not described herein again.
Through above device, the embodiment of the utility model provides a can realize the quick response to input voltage, and can provide the compensation to different loads, consequently, the device can adapt to multiple load, has increased environmental suitability.
In one possible implementation, as shown in fig. 2, the voltage output module 40 may include an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10, an eleventh transistor Q11, a third operational amplifier OP3, a third resistor R3, a fourth resistor R4, and a second capacitor C2, wherein,
a gate of the eighth transistor Q8 is electrically connected to the gate of the sixth transistor Q6, the gate of the tenth transistor Q10 and the control module, for receiving the control signal,
the drain of the eighth transistor Q8 is electrically connected to the drain of the ninth transistor Q9, the drain of the sixth transistor Q6, the drain of the tenth transistor Q10 and the voltage input module,
a source of the eighth transistor Q8 is electrically connected to the negative input terminal of the third operational amplifier OP3, the negative input terminal of the second operational amplifier OP2, the first end of the third resistor R3 and the first end of the second capacitor C2, a second end of the third resistor R3 is electrically connected to the control module and the first end of the fourth resistor R4, a second end of the fourth resistor R4 is grounded, a second end of the second capacitor C2 is grounded,
the gate of the ninth transistor Q9 is electrically connected to the control module for receiving the control signal, the source of the ninth transistor Q9 is grounded,
a positive input terminal of the third operational amplifier OP3 is electrically connected to the source of the tenth transistor Q10 and the drain of the eleventh transistor Q11, an output terminal of the third operational amplifier OP3 is electrically connected to the gate of the eleventh transistor Q11,
the source of the eleventh transistor Q11 is electrically connected to the current determination module and the control module,
a first end of the third resistor R3 is used for outputting the target voltage.
Through above device, the utility model discloses voltage output module can realize voltage output according to the input voltage that control signal and input module spread into to output stable target voltage.
In one possible embodiment, the target voltage may be obtained according to the following formula:
vout is Vin/(1-D), where D may represent the duty cycle of the control signal.
Therefore, through adjustment control signal's duty cycle, the utility model discloses can the quick response input voltage's change, the target output voltage of output needs.
While a description of possible implementations of the voltage input module 10 follows, it should be understood that the following description is exemplary and should not be taken as limiting the invention.
In one possible embodiment, as shown in fig. 2, the voltage input module 10 may include an input capacitor Cin, an input inductor L, wherein,
a first end of the input capacitor Cin is electrically connected to the first end of the input inductor L for receiving the input voltage, a second end of the input capacitor Cin is grounded,
a second end of the input inductor L is electrically connected to the drain of the ninth transistor Q9, the drain of the eighth transistor Q8, the drain of the sixth transistor Q6, and the drain of the tenth transistor Q10.
It should be noted that, although the present invention has been described by taking an input capacitor as an example, it should be understood that the present invention is not limited thereto, and in other embodiments, the input capacitor may be replaced by an input capacitor network composed of a plurality of capacitors, and the input capacitor network may include a plurality of capacitors, and the present invention is not limited to the connection relationship and the number thereof.
In a possible embodiment, the input inductor L may be provided with or replaced by a plurality of inductors, and the connection manner of the plurality of inductors may be in series, in parallel, or a combination thereof, and the present invention does not limit the number of inductors included in the input inductor L and the connection relationship.
While a description of possible implementations of the control module 30 follows, it should be understood that the following description is exemplary and should not be taken as limiting the invention.
In one possible implementation, as shown in fig. 2, the Control module 30 may include an error amplifier gm, a reference resistor Rea, a reference capacitor Cea, a comparator CMP, an Oscillator (Oscillator), a flip-flop, a PWM controller (PWM controller), a current source Iramp, a reset switch Vreset, a capacitor Cramp, and a sampling resistor Rramp, where:
the positive end of the error amplifier gm is electrically connected between the third resistor and the fourth resistor and is used for inputting the feedback voltage signal Vfb of the voltage output module 40, the negative end of the error amplifier gm is used for inputting the reference voltage Vref, and the output end of the error amplifier gm is electrically connected to the first end of the reference resistor Rea and the negative end of the comparator CMP;
the second end of the reference resistor Rea is electrically connected to the first end of the reference capacitor Cea, and the second end of the reference capacitor Cea is grounded;
the positive electrode end of the comparator CMP is electrically connected to a current source Iramp, a first end of a capacitor Cramp and a first end of a reset switch and used for inputting a comparison voltage Vramp, and the output end of the comparator CMP is electrically connected to a first end R of the trigger;
the output end of the current determination module is electrically connected to the second end of the reset switch, the second end of the capacitor Cramp and the first end of the sampling resistor Rramp, and outputs a first adjusting current Isink1 and/or a second adjusting current Isink2, and the second end of the sampling resistor Rramp is grounded;
a second end S of the trigger is electrically connected to the output end of the oscillator and used for receiving a clock signal CLK output by the oscillator, and an output end Q of the trigger is electrically connected to the input end of the PWM controller;
and a first output end of the PWM controller is electrically connected to a grid electrode of the ninth transistor, and a second output end of the PWM controller is electrically connected to a grid electrode of the eighth transistor, a grid electrode of the tenth transistor and a grid electrode of the sixth transistor.
In one possible implementation, the trigger may be configured to:
when the input of the first end R is high level (1), the output of the output end Q is 1;
when the second terminal sin is high, the output terminal Q is 0.
In one possible implementation, the PWM controller may be configured to:
when the input end input is 1, the output is 1;
when the input of the input end is 0, the output is 0.
In an embodiment of the present invention, the voltage determination module may include a first determination unit and/or a second determination unit.
For the voltage determining module comprising the first determining unit, in a possible embodiment, in case of an increase in the input voltage, for example, when Vin changes by a variable of Δ Vin, when Vin is input to the first determining unit, the first determining unit may determine that the change of the first adjustment current Isink1 is Δ Isink1 — gm1 — Δ Vin, so that the initial level of Vramp changes by a component of gm1 Δ Vin Rramp, which is used to ensure that the output of Vea is as unchanged as possible, which means that the amount of change of Vfb is small, i.e., the change of Δ Vout is small, thereby reducing the fluctuation of the output voltage, in such a way that the voltage output module 40 can output a stable target voltage.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating voltage variation in a related art DC-DC architecture.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a voltage variation in a voltage regulator according to an embodiment of the present invention.
As shown in fig. 4, in the related art, when the input voltage Vin changes, the change of the voltage output Vout acting on the error amplifier gm will affect Vea, and when the Vea changes more, the new duty ratio D is adjusted by the loop more slowly, so that the output voltage whose output jumps up or down with the input voltage will be very large, in which case, the peak-to-peak value of the output voltage Vout can reach 130 mV.
As shown in fig. 5, by the embodiment of the present invention, the first determining unit determines the first adjustment current to control the control module, so that the fluctuation of the output voltage is greatly reduced, and the peak-to-peak value of the output voltage is only 30 mV.
It can be seen that this scheme can respond well to changes in the input voltage, with the peak-to-peak value Vpp of the changes in the output voltage decreasing from 130mV to 30 mV.
In order to adapt to the change of load, the current determination module of the embodiment of the present invention may further include a second determination unit, and the first adjustment current determined by the first determination unit and the second adjustment current determined by the second determination unit may act on the control module together, so that the control module may both respond to the change of the input voltage quickly and may adapt to different load conditions.
Referring to fig. 6, fig. 6 is a schematic diagram illustrating voltage variation in the voltage adjusting apparatus without using the second determining unit.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating a voltage variation in the voltage adjusting apparatus using the second determining unit.
As shown in fig. 6, since gm1 needs to be determined in the first determination unit in advance according to the set load size, the balance point is selected between light and heavy loads, and the compensation is often insufficient or overflowed for the load that is too light or too heavy, when fig. 6 does not use the second determination unit to detect the load current, the voltage adjustment device cannot adapt to the load change, and the peak-to-peak value of the change Δ Vout of the output voltage has large fluctuation when the load changes (the load current Id in fig. 6).
As shown in fig. 7, by setting the first determining unit to quickly respond to the change of the input voltage to determine the first adjusting current and setting the second determining unit to detect and compensate the load current, the voltage adjusting device not only can quickly respond to the change of the input voltage, but also can provide compensation for different loads, and under different loads, the peak-to-peak value Vpp of the fluctuation interval of the output voltage Vout is within 20mV, so that the environmental adaptability of the device is improved, the fast line excitation performance of the power supply in the TDMA test meets the requirement of SPEC, and the TDMA test requirement of the AMOLED under various application environments is met.
It should be understood that the present invention is not limited to the selection of the components and the selection of the reference voltage of the control module 30, and those skilled in the art can determine the reference voltage as needed.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A voltage regulation device, the device comprising:
a voltage input module for receiving an input voltage;
the current determining module is electrically connected with the voltage input module and used for determining the adjusting current according to the input voltage and the variation of the input voltage and the adjacent input voltage at the previous moment;
the control module is electrically connected with the current determination module and used for outputting a control signal according to the adjusting current;
and the voltage output module is electrically connected with the voltage input module, the current determination module and the control module and is used for outputting a target voltage according to the control signal and the input voltage.
2. The apparatus of claim 1, wherein the adjustment current comprises a first adjustment current, wherein the current determination module comprises a first determination unit to determine the first adjustment current,
the first determination unit includes a first operational amplifier, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, and a first resistor, wherein,
the positive input end of the first operational amplifier is used for receiving the input voltage, the negative input end of the first operational amplifier is electrically connected with the source electrode of the first transistor and the first end of the first resistor, the output end of the first operational amplifier is electrically connected with the grid electrode of the first transistor, the second end of the first resistor is grounded,
a drain of the first transistor is electrically connected to a source of the second transistor, a gate of the second transistor, and a gate of the third transistor,
a drain of the second transistor and a drain of the third transistor are for receiving a supply voltage,
a source of the third transistor is electrically connected to a source of the fourth transistor, a gate of the fourth transistor, and a gate of the fifth transistor,
a source of the fourth transistor and a source of the fifth transistor are grounded,
the drain of the fifth transistor is used for outputting the first adjusting current.
3. The apparatus according to claim 1 or 2, wherein the adjustment current comprises a second adjustment current, wherein the current determination module comprises a second determination unit for determining the second adjustment current, wherein the second determination unit comprises a current detection subunit, a multiplication subunit, a current determination subunit, wherein,
the current detection subunit is electrically connected to the voltage output module and is used for detecting load current and obtaining detection voltage according to the load current;
the multiplier subunit is electrically connected to the voltage output module and the voltage input module and is used for multiplying the input voltage and the detection voltage to obtain an intermediate voltage;
the current determining subunit is electrically connected to the multiplier subunit and configured to determine the second adjustment current according to the intermediate voltage.
4. The apparatus of claim 3, wherein the current detection subunit comprises a sixth transistor, a seventh transistor, a second operational amplifier, a second resistor, and a first capacitor, wherein,
a gate of the sixth transistor is configured to receive the control signal, a drain of the sixth transistor is electrically connected to the voltage input module, a source of the sixth transistor is electrically connected to the positive input terminal of the second operational amplifier and the drain of the seventh transistor,
the negative input end of the second operational amplifier is electrically connected to the voltage output module, the output end of the second operational amplifier is electrically connected to the grid electrode of the seventh transistor, the source electrode of the seventh transistor is electrically connected to the first end of the second resistor and the first end of the first capacitor,
a second terminal of the second resistor and a second terminal of the first capacitor are grounded,
the first end of the second resistor is used for outputting the detection voltage.
5. The apparatus of claim 4, wherein the voltage output module comprises an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a third operational amplifier, a third resistor, a fourth resistor, and a second capacitor, wherein,
a gate of the eighth transistor is electrically connected to the gate of the sixth transistor, the gate of the tenth transistor, and the control module, and is configured to receive the control signal,
a drain of the eighth transistor is electrically connected to a drain of the ninth transistor, a drain of the sixth transistor, a drain of the tenth transistor, and the voltage input module,
a source of the eighth transistor is electrically connected to the negative input terminal of the third operational amplifier, the negative input terminal of the second operational amplifier, the first end of the third resistor, and the first end of the second capacitor, a second end of the third resistor is electrically connected to the control module and the first end of the fourth resistor, a second end of the fourth resistor is grounded, and a second end of the second capacitor is grounded,
the gate of the ninth transistor is electrically connected to the control module for receiving the control signal, the source of the ninth transistor is grounded,
a positive input end of the third operational amplifier is electrically connected to a source of the tenth transistor and a drain of the eleventh transistor, an output end of the third operational amplifier is electrically connected to a gate of the eleventh transistor,
a source of the eleventh transistor is electrically connected to the current determination module and the control module,
the first end of the third resistor is used for outputting the target voltage.
6. The apparatus of claim 5, wherein the voltage input module comprises an input capacitor, an input inductor, wherein,
the first end of the input capacitor is electrically connected to the first end of the input inductor and is used for receiving the input voltage, the second end of the input capacitor is grounded,
a second end of the input inductor is electrically connected to the drain of the ninth transistor, the drain of the eighth transistor, the drain of the sixth transistor, and the drain of the tenth transistor.
7. A chip, wherein the chip comprises:
a voltage regulation device as claimed in any one of claims 1 to 6.
8. A power supply, characterized in that the power supply comprises:
the chip of claim 7.
9. An electronic device, characterized in that the electronic device comprises:
the power supply of claim 8.
10. The electronic device of claim 9, wherein the electronic device comprises a display, a smartphone, or a portable device.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021238571A1 (en) * | 2020-05-29 | 2021-12-02 | 北京集创北方科技股份有限公司 | Voltage regulating apparatus, chip, power supply, and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021238571A1 (en) * | 2020-05-29 | 2021-12-02 | 北京集创北方科技股份有限公司 | Voltage regulating apparatus, chip, power supply, and electronic device |
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