CN216134429U - Charge pump circuit for promoting charge balance and enhancing driving capability - Google Patents
Charge pump circuit for promoting charge balance and enhancing driving capability Download PDFInfo
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- CN216134429U CN216134429U CN202121911214.6U CN202121911214U CN216134429U CN 216134429 U CN216134429 U CN 216134429U CN 202121911214 U CN202121911214 U CN 202121911214U CN 216134429 U CN216134429 U CN 216134429U
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Abstract
The utility model provides a charge pump circuit for promoting charge balance and enhancing driving capability, which at least comprises a first group of capacitor circuits, a second group of capacitor circuits and a charge pump circuit, wherein the first group of capacitor circuits comprises a first capacitor and a second capacitor and is electrically connected with a plurality of voltage switching elements, the second group of capacitor circuits comprises a third capacitor and a fourth capacitor and is electrically connected with a plurality of voltage switching elements, the charge pump circuit comprises two connecting circuits controlled by a switch, under a pump mode, the phases of the first group of capacitor circuits and the second group of capacitor circuits are complementary, the switches of the two connecting circuits are in a closed state, so that a series circuit formed by the first capacitor and the third capacitor is connected in parallel with a series circuit formed by the second capacitor and the fourth capacitor, the problem of the capacitor circuits when the capacitor circuits face a larger load condition can be effectively solved, and the output voltage reference can be ensured not to be disturbed, the utility model has simple structure, strong function and great commercial value.
Description
Technical Field
The present invention relates to the field of driving chip power supply charge pump circuit technology, and is especially one kind of charge pump circuit with balanced charge and strengthened driving capacity.
Background
With the progress of display technology, various display panels are continuously developed, and a negative analog voltage needs to be provided for driving the display panel. Generally speaking, the negative analog voltage can be realized by two kinds of combination circuits, the first combination circuit is a combination of a boost circuit and a boost-buck conversion circuit, the second combination circuit is a combination of a boost circuit and a charge-discharge pump circuit, the charge-discharge pump circuit can adjust the magnitude of output voltage to provide a circuit with the purpose of outputting voltage larger than input voltage, and the second combination circuit is widely used because the charge-discharge pump circuit has lower cost.
At present, the existing capacitor circuit has different switches in different voltage doubling modes, and control signals are utilized to respectively switch to control the charging and discharging of different capacitors and pump behaviors, and each group of switches and the capacitor behaviors are independent, so that the capacitor circuit can be pushed to the situation of smaller load under the condition of limited space; when a large load condition is encountered, the capacitor circuit may have problems of insufficient thrust of the components, unbalanced charge or poor voltage stabilization, etc., and further cause the quasi-voltage of the output voltage to be disturbed, so that the rear-end application condition is not as expected.
To overcome the above-mentioned drawbacks of the prior art, the present application provides a charge pump circuit for balancing charge and enhancing driving capability.
SUMMERY OF THE UTILITY MODEL
The utility model provides a charge pump circuit for promoting charge balance and enhancing driving capability, which aims at solving the technical defects of insufficient component thrust, unbalanced charge and poor voltage stabilization condition of the existing capacitor circuit when facing a larger load condition and promoting charge balance and enhancing driving capability;
the first group of capacitor circuits comprise a first capacitor and a second capacitor, the first capacitor and the second capacitor are electrically connected with the plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential; the second group of capacitor circuits comprise a third capacitor and a fourth capacitor, the third capacitor and the fourth capacitor are electrically connected with the plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential;
the charge pump circuit comprises two connecting circuits controlled by a switch, and under a pump mode, the phases of the first group of capacitor circuits and the second group of capacitor circuits are complementary, and the switches of the two connecting circuits are in a closed state, so that a series circuit formed by the first capacitor and the third capacitor is connected in parallel with a series circuit formed by the second capacitor and the fourth capacitor.
Preferably, in the pump mode, the voltage stabilizing effect of the circuit is increased so that the output equivalent capacitance is the sum of the second capacitance and the fourth capacitance.
Preferably, when the control switch of the charge pump circuit is in an off state and the phi 1 and phi 1_2 control signals of the first group of capacitor circuits are at a high level, the phi 2 control signal is at a low level, so that the circuit forming loop charges the second capacitor and the first capacitor with charges;
when the control switch of the charge pump circuit is in an off state and phi 2 control signals of the first group of capacitor circuits are in a high potential, phi 1 is converted into a low potential, so that an open circuit is formed between the first capacitor and the second capacitor, and two groups of loops are formed through the switching elements corresponding to phi 2, wherein a power supply of one of the loops continuously charges the first capacitor through the switching elements, and the second capacitor reversely discharges charges an output node, so that the pump circuit is in a voltage doubling output mode;
when the control switch of the charge pump circuit is in an off state and the phi 2 and phi 2_2 control signals of the second group of capacitor circuits are high, the phi 1 control signal is low, so that the circuit forming loop charges the fourth capacitor and the third capacitor;
when the control switch of the charge pump circuit is in an off state and the phi 1 control signal of the second group of capacitor circuits is at a high potential, phi 2 is converted into a low potential, so that an open circuit is formed between the third capacitor and the fourth capacitor, and two groups of loops are formed through the corresponding switching element of phi 1, wherein one power supply continuously charges the third capacitor through the switching element, and the fourth capacitor reversely discharges charges to an output node, so that the pump circuit is in a voltage doubling output mode.
Preferably, when the control switch of the charge pump circuit is in an off state and the first and second sets of capacitor circuits are in a voltage doubling mode, for Φ 1 and Φ 2, the first and second capacitors have the same charge/discharge behavior as the third and fourth capacitors.
The utility model provides a charge pump circuit for promoting charge balance and enhancing driving capability, which at least comprises a first group of capacitor circuits, a second group of capacitor circuits and a charge pump circuit, wherein the charge pump circuit comprises two connecting circuits controlled by a switch, under a pump mode, the phases of the first group of capacitor circuits and the second group of capacitor circuits are complementary, and the switches of the two connecting circuits are in a closed state, so that a series circuit formed by a first capacitor and a third capacitor is connected in parallel with a series circuit formed by a second capacitor and a fourth capacitor, the behaviors of the first group of capacitor circuits and the second group of capacitor circuits are dependent, and the charging pump behaviors of phi 1 and phi 2 are consistent, thereby achieving balance; meanwhile, the capacitors are connected in parallel, the voltage stabilizing effect of the circuit is increased to enable the output equivalent capacitor to be the sum of the second capacitor and the fourth capacitor, the problems of insufficient component thrust, unbalanced charge or poor voltage stabilizing situation and the like when the capacitor circuit faces a larger load situation can be effectively solved, the output voltage standard voltage can be guaranteed not to be disturbed, and the rear-end application is enabled to be in line with the expectation.
Drawings
Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of a charge pump circuit for charge balancing and drive enhancement according to an embodiment of the present invention;
in fig. 1: a first group of capacitive circuits 1; a first capacitor 11; a second capacitor 12; a second group of capacitance circuits 2; a third capacitor 21; a fourth capacitor 22; a charge pump circuit 3.
Detailed Description
In order to better and clearly show the technical scheme of the utility model, the utility model is further described with reference to the attached drawings.
FIG. 1 is a schematic diagram of a charge pump circuit for balancing charge and enhancing driving capability according to an embodiment of the present invention, wherein the charge pump circuit for balancing charge and enhancing driving capability includes a first capacitor circuit 1, a second capacitor circuit 2, and a charge pump circuit 3; the first group of capacitor circuits 1 comprises a first capacitor 11 and a second capacitor 12, wherein the first capacitor 11 and the second capacitor 12 are electrically connected with a plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential; the second group of capacitor circuits 2 comprises a third capacitor 21 and a fourth capacitor 22, the third capacitor 21 and the fourth capacitor 22 are electrically connected with a plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential;
the charge pump circuit 3 includes two connection circuits controlled by switches, and in the pump mode, the phases of the first capacitor circuit 1 and the second capacitor circuit 2 are complementary, and the switches of the two connection circuits are in a closed state, so that the series circuit formed by the first capacitor 11 and the third capacitor 21 is connected in parallel with the series circuit formed by the second capacitor 12 and the fourth capacitor 22.
It is understood by those skilled in the art that the present invention provides a charge pump circuit for balancing charge and enhancing driving capability, which comprises a first capacitor circuit 1, a second capacitor circuit 2, and a charge pump circuit 3, wherein the first capacitor circuit 1 and the second capacitor circuit 2 respectively comprise two capacitors and a plurality of voltage switching elements connected to the two capacitors, the charge pump circuit 3 comprises two connection circuits controlled by switches, in a pump mode, the phases of the first capacitor circuit 1 and the second capacitor circuit 2 are complementary, and the switches of the two connection circuits are in a closed state, so that a series circuit formed by the first capacitor 11 and the third capacitor 21 and a series circuit formed by the second capacitor 12 and the fourth capacitor 22 are connected in parallel, so that the first capacitor circuit 1 and the second capacitor circuit 2 act as a dependency, the charging pumps with phi 1 and phi 2 act in the same way, so as to reach the balance; meanwhile, the capacitors are connected in parallel, the voltage stabilizing effect of the circuit is increased, the problems that the thrust of the components is insufficient, the electric charge is unbalanced or the voltage stabilizing situation is poor when the capacitor circuit faces a larger load situation can be effectively solved, the output voltage standard voltage is not disturbed, and therefore the rear-end application is expected.
Further, in the pump mode, the voltage stabilizing effect of the circuit is increased to make the output equivalent capacitor be the sum of the second capacitor 12 and the fourth capacitor 22, and those skilled in the art understand that, in the pump mode, the switches of the two paths of the connection circuit controlled by the switch of the charge pump circuit 3 are in the closed state, so that the series circuit formed by the first capacitor 11 and the third capacitor 21 is connected in parallel with the series circuit formed by the second capacitor 12 and the fourth capacitor 22, the first group of capacitor circuits 1 and the second group of capacitor circuits 2 act in a dependent manner, and the charge pump behaviors of phi 1 and phi 2 are consistent, that is, when phi 1 is at a high potential or phi 2 is at a high potential, the second capacitor 12 and the fourth capacitor 22 both form reverse discharge charges to the output node, the output equivalent capacitor is the sum of the second capacitor 12 and the fourth capacitor 22, and the voltage stabilizing effect of the circuit is increased.
Further, when the control switch of the charge pump circuit 3 is in an off state and the phi 1 and phi 1_2 control signals of the first capacitor circuit 1 are at high potentials, the corresponding voltage switching element switch is in an on state, the phi 2 control signal of the capacitor circuit is at a low potential, and the corresponding voltage switching element switch is in an off state, so that the circuit forms a single loop to charge the second capacitor 12 and the first capacitor 11 with charges;
when the control switch of the charge pump circuit 3 is in an off state and the phi 2 control signal of the first group of capacitor circuits 1 is in a high potential, the switch of the switching element corresponding to phi 2 is in a closed state, and phi 1 is converted into a low potential, and the switch of the corresponding switching element is in an off state, so that an open circuit is formed between the first capacitor 11 and the second capacitor 12, and two groups of loops are formed through the switch element corresponding to phi 2, wherein a power supply of the loop continuously charges the first capacitor 11 through the switching element, and the second capacitor 12 reversely discharges charges to an output node, so that the pump circuit is in a voltage doubling output mode;
when the control switch of the charge pump circuit 3 is in an off state and the phi 2 and phi 2_2 control signals of the second group of capacitor circuits 2 are high, the corresponding switch of the switching element is in an on state, the phi 1 control signal of the capacitor circuit is low, the corresponding switch of the switching element is in an off state, so that a single loop is formed between the third capacitor 21 and the fourth capacitor 22, and charges are charged into the fourth capacitor 22 and the third capacitor 21;
when the control switch of the charge pump circuit 3 is in an off state and the phi 1 control signal of the second group of capacitor circuits 2 is at a high potential, the switch of the switching element corresponding to phi 1 is in an on state, phi 2 is converted to a low potential and the switch of the switching element corresponding to the low potential is in an off state, so that an open circuit is formed between the third capacitor 21 and the fourth capacitor 22, and two groups of loops are formed through the switch element corresponding to phi 1, wherein a power supply of one of the loops continuously charges the third capacitor 21 through the switch element, and the fourth capacitor 22 reversely discharges charges to an output node, so that the pump circuit is in a voltage-doubling output mode.
It is understood by those skilled in the art that when the control switch of the charge pump circuit 3 is in the off state, in the voltage doubling output mode, for φ 1 and φ 2, the first set of capacitor circuits 1 and the second set of capacitor circuits 2 operate in two complementary ways, and can operate normally when the load is light or evenly distributed.
Further, when the control switch of the charge pump circuit 3 is in an off state and the first and second sets of capacitor circuits 1 and 2 are in a voltage doubling mode, for Φ 1 and Φ 2, the charging and discharging behaviors of the first and second capacitors 11 and 12, the third and fourth capacitors 21 and 22 are the same, and in the voltage doubling mode, the capacitor circuits are matched with phases Φ 1, Φ 2, Φ 1_1 and Φ 2_ 1.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model.
Claims (4)
1. A charge pump circuit for promoting charge balance and enhancing driving capability, which is characterized in that it at least comprises a first group of capacitor circuits (1), a second group of capacitor circuits (2) and a charge pump circuit (3);
the first group of capacitor circuits (1) comprises a first capacitor (11) and a second capacitor (12), wherein the first capacitor (11) and the second capacitor (12) are electrically connected with a plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential; the second group of capacitor circuits (2) comprises a third capacitor (21) and a fourth capacitor (22), wherein the third capacitor (21) and the fourth capacitor (22) are electrically connected with the plurality of voltage switching elements, and the switch is in a closed state when phi is a high potential and is in an open state when phi is a low potential;
the charge pump circuit (3) comprises two connecting circuits controlled by switches, phases of the first group of capacitor circuits (1) and the second group of capacitor circuits (2) are complementary under a pump mode, and the switches of the two connecting circuits are in a closed state, so that a series circuit formed by the first capacitor (11) and the third capacitor (21) is connected in parallel with a series circuit formed by the second capacitor (12) and the fourth capacitor (22).
2. The charge pump circuit of claim 1, wherein in the pump mode, the voltage regulation effect is increased such that the output equivalent capacitance is the sum of the second capacitor (12) and the fourth capacitor (22).
3. The charge pump circuit according to claim 1, wherein when the control switch of the charge pump circuit (3) is in an off state and the control signals Φ 1 and Φ 1_2 of the first capacitor circuit (1) are at a high level, the control signal Φ 2 is at a low level, so that the circuit forms a loop to charge the second capacitor (12) and the first capacitor (11);
when the control switch of the charge pump circuit (3) is in an off state and phi 2 control signals of the first group of capacitor circuits (1) are in a high potential, phi 1 is converted into a low potential, so that an open circuit is formed between the first capacitor (11) and the second capacitor (12), two groups of loops are formed through the corresponding switching elements of phi 2, one power supply of the loop continuously charges the first capacitor (11) through the switching elements, and the other second capacitor (12) reversely discharges charges to an output node, so that the pump circuit is in a voltage doubling output mode;
when the control switch of the charge pump circuit (3) is in an off state and the phi 2 and phi 2_2 control signals of the second group of capacitor circuits (2) are high potential, the phi 1 control signal is low potential, so that the circuit forms a loop to charge the fourth capacitor (22) and the third capacitor (21) with charges;
when the control switch of the charge pump circuit (3) is in an off state and the phi 1 control signal of the second group of capacitor circuits (2) is at a high potential, phi 2 is converted into a low potential, so that an open circuit is formed between the third capacitor (21) and the fourth capacitor (22), and two loops are formed through the corresponding switch element of phi 1, one power supply of the loop continuously charges the third capacitor (21) through the switch element, and the fourth capacitor (22) reversely discharges charges an output node, so that the pump circuit is in a voltage doubling output mode.
4. The charge pump circuit of claim 3, wherein when the control switch of the charge pump circuit (3) is in an off state and the first and second capacitor circuits (1, 2) are in a voltage doubling mode, the first and second capacitors (11, 12) and the third and fourth capacitors (21, 22) are charged and discharged in the same manner for φ 1 and φ 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121911214.6U CN216134429U (en) | 2021-08-16 | 2021-08-16 | Charge pump circuit for promoting charge balance and enhancing driving capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121911214.6U CN216134429U (en) | 2021-08-16 | 2021-08-16 | Charge pump circuit for promoting charge balance and enhancing driving capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216134429U true CN216134429U (en) | 2022-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121911214.6U Active CN216134429U (en) | 2021-08-16 | 2021-08-16 | Charge pump circuit for promoting charge balance and enhancing driving capability |
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| Country | Link |
|---|---|
| CN (1) | CN216134429U (en) |
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2021
- 2021-08-16 CN CN202121911214.6U patent/CN216134429U/en active Active
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| CB03 | Change of inventor or designer information |
Inventor after: Xu Yixi Inventor after: Zhou Jian Inventor before: Xu Yixi |