WO2018010221A1 - 一种电压转换电路及液晶显示驱动芯片 - Google Patents

一种电压转换电路及液晶显示驱动芯片 Download PDF

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Publication number
WO2018010221A1
WO2018010221A1 PCT/CN2016/092324 CN2016092324W WO2018010221A1 WO 2018010221 A1 WO2018010221 A1 WO 2018010221A1 CN 2016092324 W CN2016092324 W CN 2016092324W WO 2018010221 A1 WO2018010221 A1 WO 2018010221A1
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Prior art keywords
switch
capacitor
voltage
turned
input power
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Ceased
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PCT/CN2016/092324
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English (en)
French (fr)
Inventor
纪飞林
谭小平
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US15/125,575 priority Critical patent/US10050523B1/en
Publication of WO2018010221A1 publication Critical patent/WO2018010221A1/zh
Anticipated expiration legal-status Critical
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/02Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/06Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H02M3/073Charge pumps of the Schenkel-type
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/02Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/06Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/028Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/02Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/06Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
    • H02M3/073Charge pumps of the Schenkel-type
    • H02M3/077Charge pumps of the Schenkel-type with parallel connected charge pump stages

Definitions

  • the present invention relates to the field of liquid crystal display technologies, and in particular, to a voltage conversion circuit and a liquid crystal display driving chip using the same.
  • liquid crystal display (LCD) module is a large power consumption in a smart phone, and its power conversion efficiency is directly related to the energy consumption of the entire smart phone system.
  • the embodiment of the invention provides a voltage conversion circuit and a liquid crystal display driving chip using the voltage conversion circuit, so as to convert the voltage of the input power source into output voltages of multiple magnifications, thereby improving the conversion efficiency of the power source.
  • a voltage conversion circuit includes a voltage conversion module and a control module
  • the voltage conversion module includes an input terminal, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, and a Seven switches, eighth switch, ninth switch, tenth switch, eleventh switch, twelfth switch, thirteenth switch and output end;
  • One ends of the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all connected to the input end, and the other end of the first switch and one end of the first capacitor and the One end of the ninth switch is connected, the other end of the ninth switch is grounded, the other end of the first capacitor is opposite to the other end of the second switch, one end of the sixth switch, and one end of the tenth switch Connecting, the other end of the sixth switch is connected to one end of the second capacitor, the other end of the tenth switch is opposite to one end of the eleventh switch, one end of the twelfth switch, the first One end of the thirteen switch is connected to the output end, and the other end of the second capacitor is connected to the other end of the third switch, the other end of the eleventh switch, and one end of the seventh switch.
  • the other end of the seventh switch is connected to one end of the third capacitor, the other end of the third capacitor is opposite to the other end of the fourth switch, the other end of the twelfth switch, and the eighth switch One end of the eighth switch is connected to the other end Capacitor connected to one end, the other end of the fourth other terminal of the capacitor and the other end of the fifth switch and the thirteenth switch is connected;
  • the input end is configured to connect an input power source
  • the control module is connected to the voltage conversion module, and is configured to control whether the first switch to the thirteenth switch is turned on or off, and the voltage conversion module is used by the voltage conversion module.
  • the voltage of the input power source is converted into an output voltage of a different power by the charging and discharging of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor, and is outputted from the output terminal.
  • the input power is to the first capacitor, the second capacitor, and the third The capacitor and the fourth capacitor are charged; when the fourth switch, the eighth switch, and the thirteenth switch are turned on, and the remaining switches are turned off, the voltage difference across the fourth capacitor is equal to 1/6 times the input power The voltage is equal to 7/6 times the voltage of the input power source.
  • the input power source charges the first capacitor, the second capacitor, and the third capacitor;
  • the second switch, the sixth switch, and the eleventh switch are turned on, and the other switches are turned off, the second capacitor is two
  • the voltage difference at the terminals is equal to 1/5 times the voltage of the input power source, which is equal to 6/5 times the voltage of the input power source.
  • the input power is to the first capacitor, the second capacitor, and the third The capacitor and the fourth capacitor are charged; when the first switch and the tenth switch are turned on, and the remaining switches are turned off, the voltage difference across the first capacitor is equal to 1/3 times the voltage of the input power source, The output voltage is equal to 4/3 times the voltage of the input supply.
  • the input power source charges the first capacitor, the second capacitor, and the third capacitor;
  • the first switch and the tenth switch are turned on, and the remaining switches are turned off, the voltage difference across the first capacitor is equal to 2/5 times the voltage of the input power source, and the output voltage is equal to 7/5 times The voltage of the input power supply.
  • the input power is to the first capacitor, the second capacitor, and the third The capacitor and the fourth capacitor are charged; when the first switch, the sixth switch, and the eleventh switch are turned on, and the remaining switches are turned off, the voltage difference between the first capacitor and the voltage across the second capacitor The sum of the differences is equal to 1/2 times the voltage of the input power source, the output voltage being equal to 3/2 times the voltage of the input power source.
  • the input power source charges the first capacitor, the second capacitor, and the third capacitor;
  • the first switch, the sixth switch and the eleventh switch are turned on, and the remaining switches are turned off, the sum of the voltage difference between the first capacitor and the voltage difference across the second capacitor is equal to 3/5 times
  • the voltage of the input power source is equal to 8/5 times the voltage of the input power source.
  • the input power source charges the first capacitor and the second capacitor; when the first switch and the first switch The ten switch is turned on, and when the remaining switches are turned off, the voltage difference across the first capacitor is equal to 2/3 times the voltage of the input power source, and the output voltage is equal to 5/3 times the voltage of the input power source.
  • the input power is to the first capacitor, the second capacitor, and the third The capacitor and the fourth capacitor are charged; when the first switch, the sixth switch, the seventh switch, and the twelfth switch are turned on, and the remaining switches are turned off, the voltage difference between the first capacitor and the second capacitor The voltage difference between the two ends of the capacitor The sum of the voltage differences across the third capacitor is equal to 5/6 times the voltage of the input power source, and the output voltage is equal to 11/6 times the voltage of the input power source.
  • the input power source charges the first capacitor; when the first switch and the tenth switch are turned on, the remaining switches are off When turned on, the voltage difference across the first capacitor is equal to the voltage of the input power source, and the output voltage is equal to twice the voltage of the input power source.
  • the voltage conversion module further includes a forty switch, one end of the fourteenth switch is connected between the third capacitor and the seventh switch, and the other end of the fourteenth switch is grounded.
  • the control module is further configured to control the on or off of the forty switch.
  • the third switch, the fourth switch, the sixth switch, the ninth switch, and the fourteenth switch are turned on, and the other switches are turned off, the input power is applied to the first capacitor, the second capacitor, and the first The three capacitors are charged; when the second switch, the sixth switch, the seventh switch, and the twelfth switch are turned on, and the remaining switches are turned off, the voltage difference between the two ends of the second capacitor is opposite to the ends of the third capacitor
  • the sum of the voltage differences is equal to 4/3 times the voltage of the input power source, which is equal to 7/3 times the voltage of the input power source.
  • the input power is applied to the first capacitor, The second capacitor, the third capacitor, and the fourth capacitor are charged; when the first switch, the sixth switch, the seventh switch, and the twelfth switch are turned on, and the remaining switches are turned off, the voltage difference between the first capacitors
  • the sum of the voltage difference across the second capacitor and the voltage difference across the third capacitor is equal to 5/3 times the voltage of the input power source, and the output voltage is equal to 8/3 times the voltage of the input power source.
  • the input power is applied to the first capacitor, The second capacitor, the third capacitor, and the fourth capacitor are charged; when the first switch, the sixth switch, the seventh switch, the eighth switch, and the thirteenth switch are turned on, and the remaining switches are turned off, the first capacitor a voltage difference at both ends, a voltage difference across the second capacitor, a voltage difference across the third capacitor, and a voltage difference across the fourth capacitor equal to twice the voltage of the input power source, the output voltage Equal to 3 times the voltage of the input power supply.
  • the first capacitor has the same capacitance as the third capacitor
  • the second capacitor has the same capacitance as the fourth capacitor
  • the first capacitor, the second capacitor, the third capacitor, and the first capacitor Four capacitor capacitance The ratio is 1:2:1:2.
  • the second capacitor is formed by two parallel connections of the first capacitor or the two capacitors
  • the fourth capacitor is formed by two parallel capacitors or two of the first capacitors.
  • a liquid crystal display driving chip includes a voltage conversion circuit, and the voltage conversion circuit includes a voltage conversion module and a control module;
  • the voltage conversion module includes an input terminal, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, and a Seven switches, eighth switch, ninth switch, tenth switch, eleventh switch, twelfth switch, thirteenth switch and output end;
  • One ends of the first switch, the second switch, the third switch, the fourth switch, and the fifth switch are all connected to the input end, and the other end of the first switch and one end of the first capacitor and the One end of the ninth switch is connected, the other end of the ninth switch is grounded, the other end of the first capacitor is opposite to the other end of the second switch, one end of the sixth switch, and one end of the tenth switch Connecting, the other end of the sixth switch is connected to one end of the second capacitor, the other end of the tenth switch is opposite to one end of the eleventh switch, one end of the twelfth switch, the first One end of the thirteen switch is connected to the output end, and the other end of the second capacitor is connected to the other end of the third switch, the other end of the eleventh switch, and one end of the seventh switch.
  • the other end of the seventh switch is connected to one end of the third capacitor, the other end of the third capacitor is opposite to the other end of the fourth switch, the other end of the twelfth switch, and the eighth switch One end of the eighth switch is connected to the other end Capacitor connected to one end, the other end of the other end of the fourth capacitor and the other end of the fifth switch and the thirteenth switch is connected;
  • the input end is configured to connect an input power source
  • the control module is connected to the voltage conversion module, and is configured to control whether the first switch to the thirteenth switch is turned on or off, and the voltage conversion module is used by the voltage conversion module.
  • the voltage of the input power source is converted into an output voltage of a different power by the charging and discharging of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor, and is outputted from the output terminal.
  • the voltage conversion module further includes a forty switch, one end of the fourteenth switch is connected between the third capacitor and the seventh switch, and the other end of the fourteenth switch is grounded.
  • the control module is further configured to control the on or off of the forty switch.
  • the first capacitor has the same capacitance as the third capacitor
  • the second capacitor has the same capacitance as the fourth capacitor
  • the first capacitor, the second capacitor, the third capacitor, and the first capacitor The capacitance ratio of the four capacitors is 1:2:1:2.
  • the second capacitor is formed by two parallel connections of the first capacitor or the two capacitors
  • the fourth capacitor is formed by two parallel capacitors or two of the first capacitors.
  • the power conversion circuit sets the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the first switch to the thirteenth switch, and controls the first switch to the first through the control module Turning on or off the thirteen switches to charge and discharge the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor, thereby converting the voltage of the input power source into a plurality of different ratios
  • the output voltage is beneficial to improve the power conversion efficiency.
  • FIG. 1 is a schematic structural diagram of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a first charging state of a voltage conversion circuit according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a first discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a second state of charge of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a second discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a third charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a third discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a fourth charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a fourth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a fifth charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a fifth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of a sixth charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of a sixth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of a seventh charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 15 is a schematic diagram of a seventh discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • 16 is a schematic diagram of an eighth charging state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 17 is a schematic diagram of an eighth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 18 is a schematic diagram of a ninth state of charge of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 19 is a schematic diagram of a ninth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • 20 is a schematic diagram of a tenth state of charge of a voltage conversion circuit according to an embodiment of the present invention.
  • 21 is a schematic diagram of a tenth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • 22 is a schematic diagram of an eleventh state of charge of a voltage conversion circuit according to an embodiment of the present invention.
  • FIG. 23 is a schematic diagram of an eleventh discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • 24 is a schematic diagram of a twelfth state of charge of a voltage conversion circuit according to an embodiment of the present invention.
  • 25 is a schematic diagram of a twelfth discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • 26 is a table of true values of switches in a charge/discharge state of a voltage conversion circuit according to an embodiment of the present invention.
  • a first embodiment of the present invention provides a voltage conversion circuit 100, including a voltage conversion module 110 and a control module 130;
  • the voltage conversion module 110 includes an input terminal 111, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first switch S1, a second switch S2, a third switch S3, and a fourth switch S4.
  • One ends of the first switch S1, the second switch S2, the third switch S3, the fourth switch S4, and the fifth switch S5 are connected to the input end 111, and the other end of the first switch S1 is One end of the first capacitor C1 is connected to one end of the ninth switch S9, the other end of the ninth switch S9 is grounded, the other end of the first capacitor C1 is opposite to the other end of the second switch S2, One end of the sixth switch S6 is connected to one end of the tenth switch S10, the other end of the sixth switch S6 is connected to one end of the second capacitor C2, and the other end of the tenth switch S10 is connected to the first One end of the eleven switch S11, one end of the twelfth switch S12, one end of the thirteenth switch S13, and the output end 113 are connected, and the other end of the second capacitor C2 and the third switch S3
  • the other end of the eleventh switch S11 and one end of the seventh switch S7 are connected, the other end of the seventh switch S7 and one end
  • the input terminal 111 is configured to be connected to the input power source Vin
  • the control module 130 is connected to the voltage conversion module 110 for controlling the conduction or disconnection of the first switch S1 to the fourteenth switch S14.
  • the voltage conversion module 110 is configured to convert the voltage of the input power source Vin into different magnifications under the charging and discharging of the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4. The voltage is output and output from the output terminal 113 to the corresponding load R.
  • the first capacitor C1 has the same capacitance as the third capacitor C3, the second capacitor has the same capacitance as the fourth capacitor C4, and the first capacitor C1
  • the capacitance ratio of the two capacitors C2, the third capacitor C3 and the fourth capacitor C4 is 1:2:1:2.
  • the capacitance of the first capacitor C1 and the third capacitor C3 may be 1 uF
  • the capacitance of the second capacitor C2 and the fourth capacitor C4 may be 2 uF.
  • the second capacitor C2 may be formed by two parallels of the first capacitor C1 or the two capacitors C3, and the fourth capacitor C4 may be composed of two The third capacitor C3 or the two of the first capacitors C1 are formed in parallel.
  • the control module 130 includes a controller 131 and a crystal oscillator (OSC) 133.
  • the controller 131 is electrically connected to the crystal oscillator 133 and the voltage conversion module 110.
  • the crystal oscillator 133 is electrically connected to the voltage conversion module 110, and the crystal oscillator 133 is configured to provide the controller 131 with a working timing signal to trigger the control 131 to control the first according to the working timing signal.
  • a switch S1 to the fourteenth switch S14 are turned on or off, thereby performing charging and discharging operations on the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4.
  • the voltage conversion circuit 100 can further include an input capacitor Cin and an output capacitor Cout, the input capacitor Cin is connected to the input terminal 111 and the other end is grounded; the output capacitor Cout is connected to the output end 113. Connect and ground the other end.
  • the input power source Vin is opposite to the A capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 are charged to form a first state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 pass through the fifth switch S5, the sixth switch S6, the seventh switch S7, the eighth switch S8, and the ninth switch.
  • S9 is connected in series between the positive pole of the input power source Vin and the ground.
  • the voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 and the input power source Vin Voltage phase Similarly, the voltage of one end of the fourth capacitor C4 connected to the third capacitor C3 is equal to 5/6 times the voltage of the input power source Vin, and the third capacitor C3 is connected to the end of the second capacitor C2.
  • the voltage is equal to 1/2 times the voltage of the input power source Vin, and the voltage of one end of the second capacitor C2 connected to the first capacitor C1 is equal to 1/3 times the voltage of the input power source Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to 1.17 times the voltage output of the input power source Vin by switching between the first state of charge and the first state of discharge.
  • the input power source Vin is opposite to the first capacitor C1.
  • the two capacitors C2 and the third capacitor C3 are charged to form a second state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, and the third capacitor C are connected in series to the input power source Vin through the fourth switch S4, the sixth switch S6, the seventh switch S7, and the ninth switch S9. Between the positive pole and the ground.
  • the voltage of one end of the third capacitor C3 connected to the fourth switch S4 is the same as the voltage of the input power source Vin.
  • the voltage of one end of the third capacitor C3 connected to the second capacitor C2 is equal to 3/5 times the voltage of the input power source Vin, and the voltage of the second capacitor C2 connected to the first capacitor C1 is equal to 1 /5 times the voltage of the input power source Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to 1.2 times the voltage output of the input power source Vin by switching between the second state of charge and the second state of discharge.
  • the fifth switch S5, the sixth switch S6, the seventh switch S7, and the eighth switch S8 and ninth switch S9 are turned on, and when the other switches are turned off, the input power source Vin charges the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 to form the voltage conversion.
  • the third state of charge of the circuit At this time, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 pass through the fifth switch S5, the sixth switch S6, the seventh switch S7, the eighth switch S8, and the ninth switch. S9 is connected in series between the positive pole of the input power source Vin and the ground.
  • the voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 and the input power source Vin is equal to 5/6 times the voltage of the input power source Vin
  • the third capacitor C3 is connected to the second capacitor C2.
  • the voltage at one end is equal to 1/2 times the voltage of the input power source Vin
  • the voltage of one end of the second capacitor C2 connected to the first capacitor C1 is equal to 1/3 times the voltage of the input power source Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to 1.33 times the voltage output of the input power source Vin.
  • the fourth switch S4, the sixth switch S4, the seventh switch S7, and the ninth switch S9 are turned on, and the other switches are turned off, the input power source Vin is opposite to the first capacitor C1.
  • the second capacitor C2 and the third capacitor C3 are charged to form a fourth state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, and the third capacitor C are connected in series to the input power source Vin through the fourth switch S4, the sixth switch S6, the seventh switch S7, and the ninth switch S9. Between the positive pole and the ground.
  • the voltage of one end of the third capacitor C3 connected to the fourth switch S4 is the same as the voltage of the input power source Vin.
  • the voltage of one end of the third capacitor C3 connected to the second capacitor C2 is equal to 3/5 times the voltage of the input power source Vin, and the voltage of the second capacitor C2 connected to the first capacitor C1 is equal to 1 /5 times the voltage of the input power source Vin.
  • the first capacitor C1 and the second capacitor C2 are completed in the fourth state of charge. And charging the third capacitor C3, when the first switch S1 and the tenth switch S10 are turned on, and the remaining switches are turned off, forming a fourth discharging state of the voltage converting circuit.
  • the voltage difference across the first capacitor C1 is equal to 2/5 times the voltage of the input power source Vin
  • the output voltage is equal to 7/5 times the voltage of the input power source Vin. That is, the voltage conversion circuit can convert the voltage of the input power source Vin to 1.4 times the voltage output of the input power source Vin by switching between the fourth state of charge and the fourth state of discharge.
  • the input power source Vin is opposite to the A capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 are charged to form a fifth state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 pass through the fifth switch S5, the sixth switch S6, the seventh switch S7, the eighth switch S8, and the ninth switch.
  • S9 is connected in series between the positive pole of the input power source Vin and the ground.
  • the voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 and the input power source Vin is equal to 5/6 times the voltage of the input power source Vin
  • the third capacitor C3 is connected to the second capacitor C2.
  • the voltage at one end is equal to 1/2 times the voltage of the input power source Vin
  • the voltage of one end of the second capacitor C2 connected to the first capacitor C1 is equal to 1/3 times the voltage of the input power source Vin.
  • the fifth charging state is completed, charging the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4, when the first switch S1 and the sixth The switch S6 and the eleventh switch S11 are turned on, and when the remaining switches are turned off, the fifth discharge state of the voltage conversion circuit is formed.
  • the sum of the voltage difference across the first capacitor C1 and the voltage difference across the second capacitor C2 is equal to 1/2 times the voltage of the input power source Vin, and the output voltage is equal to 3/2 times Enter the voltage of the power supply Vin. That is, the voltage conversion circuit can convert the voltage of the input power source Vin to 1.5 times the voltage output of the input power source Vin by switching between the fifth state of charge and the fifth state of discharge.
  • the input power source Vin is opposite to the first capacitor C1.
  • the two capacitors C2 and the third capacitor C3 are charged to form a sixth state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, and the third capacitor C are connected in series to the anode of the input power source Vin through the fourth switch S4, the sixth switch S6, the seventh switch S7, and the ninth switch S9. Between the ground and the ground.
  • the voltage of one end of the third capacitor C3 connected to the fourth switch S4 is the same as the voltage of the input power source Vin.
  • the voltage of one end of the third capacitor C3 connected to the second capacitor C2 is equal to 3/5 times the voltage of the input power source Vin, and the voltage of the second capacitor C2 connected to the first capacitor C1 is equal to 1 /5 times the voltage of the input power source Vin.
  • a sixth discharge state of the voltage conversion circuit is formed.
  • the sum of the voltage difference between the first capacitor C1 and the voltage difference across the second capacitor C2 is equal to 3/5 times the voltage of the input power source Vin
  • the output voltage is equal to 8/5 times Enter the voltage of the power supply Vin. That is, the voltage conversion circuit can convert the voltage of the input power source Vin to 1.6 times the voltage output of the input power source Vin by switching between the sixth state of charge and the sixth state of discharge.
  • the input power source Vin charges the first capacitor C1 and the second capacitor C2. Forming a seventh state of charge of the voltage conversion circuit.
  • the first capacitor C1 and the second capacitor C2 are connected in series between the positive pole of the input power source Vin and the ground through the third switch S3, the sixth switch S6, and the ninth switch S9.
  • the voltage of one end of the second capacitor C2 connected to the third switch S3 is the same as the voltage of the input power source Vin, and the second capacitor C2
  • the voltage of one end connected to the first capacitor C1 is equal to 2/3 times the voltage of the input power source Vin.
  • the first capacitor C1 and the second capacitor C2 are charged, when the first switch S1 and the tenth switch S10 are turned on, and the other switches are turned off.
  • Forming a seventh discharge state of the voltage conversion circuit At this time, the voltage difference across the first capacitor C1 is equal to 2/3 times the voltage of the input power source Vin, and the output voltage is equal to 5/3 times the voltage of the input power source Vin. That is, by switching between the seventh state of charge and the seventh state of discharge, the voltage conversion circuit can convert the voltage of the input power source Vin to 1.67 times the voltage output of the input power source Vin.
  • the input power source Vin is opposite to the first A capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 are charged to form an eighth state of charge of the voltage conversion circuit.
  • the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 pass through the fifth switch S5, the sixth switch S6, the seventh switch S7, the eighth switch S8, and the ninth switch.
  • S9 is connected in series between the positive pole of the input power source Vin and the ground.
  • the voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 and the input power source Vin is equal to 5/6 times the voltage of the input power source Vin
  • the third capacitor C3 is connected to the second capacitor C2.
  • the voltage at one end is equal to 1/2 times the voltage of the input power source Vin
  • the voltage of one end of the second capacitor C2 connected to the first capacitor C1 is equal to 1/3 times the voltage of the input power source Vin.
  • the input power source Vin charges the first capacitor C1 to form a ninth of the voltage conversion circuit. charging.
  • the first capacitor C1 is connected between the anode of the input power source Vin and the ground through the second switch S2 and the ninth switch S9.
  • the voltage of one end of the first capacitor C1 connected to the second switch S2 is equal to the voltage of the input power source Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to twice the voltage output of the input power source Vin by switching between the ninth state of charge and the ninth state of discharge.
  • the input power source Vin is The first capacitor C1, the second capacitor C2, and the third capacitor C3 are charged to form a tenth state of charge of the voltage conversion circuit.
  • the first capacitor C1 and the second capacitor C2 are connected in series between the positive pole of the input power source Vin and the ground through the third switch S3, the sixth switch S6, and the ninth switch S9, and the third The capacitor C3 is connected between the positive pole of the input power source Vin and the ground through the fourth switch S4 and the fourteenth switch S14.
  • a voltage of one end of the third capacitor C3 connected to the fourth switch S4 is equal to a voltage of the input power source Vin
  • a voltage of one end of the second capacitor C2 connected to the third switch S3 is equal to a voltage of the input power source Vin
  • a voltage of one end of the second capacitor C2 connected to the first capacitor C1 is equal to 2/3 times Enter the voltage of the power supply Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to 2.33 times the voltage output of the input power source Vin.
  • the input is The power source Vin charges the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 to form an eleventh state of charge of the voltage conversion circuit.
  • the first capacitor C1 and the second capacitor C2 are connected in series between the anode of the input power source Vin and the ground through the third switch S3, the sixth switch S6, and the ninth switch S9.
  • the third capacitor C3 and the fourth capacitor C4 are connected in series to the input power source Vin through the fifth switch S5, the eighth switch S8, and the fourteenth switch S14.
  • a voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 is equal to the input voltage Vin a voltage
  • a voltage of one end of the fourth capacitor C4 connected to the third capacitor C3 is equal to 2/3 times the voltage of the input voltage Vin
  • one end of the second capacitor C2 is connected to the third switch S3
  • the voltage is equal to the voltage of the input voltage Vin
  • the voltage of the second capacitor C2 connected to the first capacitor C1 is equal to 2/3 times the voltage of the input voltage Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to 2.67 times the voltage output of the input power source Vin.
  • the input is The power source Vin charges the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 to form a twelfth state of charge of the voltage conversion circuit.
  • the first capacitor C1 and the second capacitor C2 are connected in series between the anode of the input power source Vin and the ground through the third switch S3, the sixth switch S6, and the ninth switch S9.
  • the third capacitor C3 and the fourth capacitor C4 are connected in series between the positive pole of the input power source Vin and the ground through the fifth switch S5, the eighth switch S8, and the fourteenth switch S14.
  • a voltage of one end of the fourth capacitor C4 connected to the fifth switch S5 is equal to the input voltage Vin a voltage
  • a voltage of one end of the fourth capacitor C4 connected to the third capacitor C3 is equal to 2/3 times the voltage of the input voltage Vin
  • one end of the second capacitor C2 is connected to the third switch S3
  • the voltage is equal to the voltage of the input voltage Vin
  • the voltage of the second capacitor C2 connected to the first capacitor C1 is equal to 2/3 times the voltage of the input voltage Vin.
  • the voltage conversion circuit can convert the voltage of the input power source Vin to three times the voltage output of the input power source Vin by switching between the twelfth state of charge and the twelfth state of discharge.
  • the voltage conversion circuit 100 shown in FIG. 2 to FIG. 25 is a switch truth table in twelve groups of charging/discharging states.
  • the mode field corresponds to twelve different output voltages corresponding to the twelve groups of charging/discharging states, and the true values of the switches corresponding to the charging and discharging states of each output voltage are as shown in the figure.
  • the second embodiment of the present invention provides a liquid crystal display driving chip, including the voltage conversion circuit 100 according to the first embodiment of the present invention.
  • the specific structure and function of the voltage conversion circuit 100 can be as shown in FIG. 2 to FIG. 25. Related descriptions in the embodiments are not described herein again.
  • the power conversion circuit sets the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the first switch to the fourteenth switch, and controls the first switch to the first through the control module
  • the fourteen switches are turned on or off to realize charging and discharging of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor, thereby realizing converting the voltage of the input power source into a plurality of different magnifications.
  • the output voltage is beneficial to improve the power conversion efficiency.

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Abstract

提供了一种电压转换电路,包括电压转换模块(110)及控制模块(130);该电压转换模块(110)包括输入端(111)、第一电容(C1)、第二电容(C2)、第三电容(C3)、第四电容(C4)、第一开关至第十三开关(S1至S13)及输出端(113),该输入端(111)用于连接输入电源(Vin),该控制模块(130)与该电压转换模块(110)连接,用于控制该第一开关至该第十三开关(S1至S13)的导通或断开,该电压转换模块(110)用于在该第一电容(C1)、第二电容(C2)、第三电容(C3)及第四电容(C4)的充电和放电作用下,将该输入电源(Vin)的电压转换为不同倍率的输出电压,并从该输出端(113)输出。还提供一种应用该电压转换电路的液晶显示驱动芯片。该电压转换电路可以实现多倍率的电压输出,提升电压转换效率。

Description

一种电压转换电路及液晶显示驱动芯片
本发明要求2016年7月15日递交的发明名称为“一种电压转换电路及液晶显示驱动芯片”的申请号(201610559861.2)的在先申请优先权,上述在先申请的内容以引入的方式并入本文本中。
技术领域
本发明涉及液晶显示技术领域,尤其涉及一种电压转换电路及应用所述电压转换电路的液晶显示驱动芯片。
背景技术
随着液晶显示技术的不断发展,智能手机、平板电脑等便携式智能终端以其轻薄化、智能化的特点逐渐成为消费者的常规需求。随着智能手机、平板电脑等便携式智能终端越来越普及,其在日常生活中的使用场景也越来越广泛,例如接打电话、上网、阅读及影音娱乐等。目前,功耗的问题一直限制着智能手机的使用时间,故在整个智能手机系统中,电源的转换效率就至关重要。液晶显示屏(Liquid Crystal Display,LCD)模组作为智能手机中的功耗大件,其电源转换效率直接关系到整个智能手机系统的能耗。就LCD模组而言,一般只有两三个电源电压输入,然后通过驱动芯片中集成的电荷泵(charge pump)转换出需求的各种电压,并经过低压差线性稳压器(Low Dropout Regulator,LDO)稳压得到需求的电压。然而,这种方式容易受到charge pump架构的限制,通常只有两三种模式供切换得到固定倍率的电压;同时,随着需求的电压的复杂性,导致经charge pump转换和LDO稳压处理后,电源的转换效率变得非常低。
发明内容
本发明实施例提供一种电压转换电路及应用所述电压转换电路的液晶显示驱动芯片,以实现将输入电源的电压转换为多个倍率的输出电压,提升电源的转换效率。
一种电压转换电路,包括电压转换模块及控制模块;
所述电压转换模块包括输入端、第一电容、第二电容、第三电容、第四电容、第一开关、第二开关、第三开关、第四开关、第五开关、第六开关、第七开关、第八开关、第九开关、第十开关、第十一开关、第十二开关、第十三开关及输出端;
所述第一开关、第二开关、第三开关、第四开关及第五开关的一端均与所述输入端连接,所述第一开关的另一端与所述第一电容的一端及所述第九开关的一端连接,所述第九开关的另一端接地,所述第一电容的另一端与所述第二开关的另一端、所述第六开关的一端及所述第十开关的一端连接,所述第六开关的另一端与所述第二电容的一端连接,所述第十开关的另一端与所述第十一开关的一端、所述第十二开关的一端、所述第十三开关的一端及所述输出端连接,所述第二电容的另一端与所述第三开关的另一端、所述第十一开关的另一端及所述第七开关的一端连接,所述第七开关的另一端与所述第三电容的一端连接,所述第三电容的另一端与所述第四开关的另一端、所述第十二开关的另一端及所述第八开关的一端连接,所述第八开关的另一端与所述第四电容的一端连接,所述第四电容的另一端与所述第五开关的另一端及所述第十三开关的另一端连接;
所述输入端用于连接输入电源,所述控制模块与所述电压转换模块连接,用于控制所述第一开关至所述第十三开关的导通或断开,所述电压转换模块用于在所述第一电容、第二电容、第三电容及第四电容的充电和放电作用下,将所述输入电源的电压转换为不同倍率的输出电压,并从所述输出端输出。
其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第四开关、第八开关及第十三开关导通,其余开关断开时,所述第四电容两端的电压差等于1/6倍所述输入电源的电压,所述输出电压等于7/6倍所述输入电源的电压。
其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第二开关、第六开关及第十一开关导通,其余开关断开时,所述第二电容两 端的电压差等于1/5倍所述输入电源的电压,所述输出电压等于6/5倍所述输入电源的电压。
其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于1/3倍所述输入电源的电压,所述输出电压等于4/3倍所述输入电源的电压。
其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于2/5倍所述输入电源的电压,所述输出电压等于7/5倍所述输入电源的电压。
其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关及第十一开关导通,其余开关断开时,所述第一电容两端的电压差与所述第二电容两端的电压差之和等于1/2倍所述输入电源的电压,所述输出电压等于3/2倍所述输入电源的电压。
其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第一开关、第六开关及第十一开关导通,其余开关断开时,所述第一电容两端的电压差与所述第二电容两端的电压差之和等于3/5倍所述输入电源的电压,所述输出电压等于8/5倍所述输入电源的电压。
其中,当所述第三开关、第六开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容及第二电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于2/3倍所述输入电源的电压,所述输出电压等于5/3倍所述输入电源的电压。
其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差与所 述第三电容两端的电压差之和等于5/6倍所述输入电源的电压,所述输出电压等于11/6倍所述输入电源的电压。
其中,当所述第二开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于所述输入电源的电压,所述输出电压等于2倍所述输入电源的电压。
其中,所述电压转换模块还包括第四十开关,所述第十四开关的一端连接于所述第三电容与所述第七开关之间,所述第十四开关的另一端接地,所述控制模块还用于控制所述第四十开关的导通或断开。
其中,当所述第三开关、第四开关、第六开关、第九开关及第十四开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第二开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第二电容两端的电压差与所述第三电容两端的电压差之和等于4/3倍所述输入电源的电压,所述输出电压等于7/3倍所述输入电源的电压。
其中,当所述第三开关、第五开关、第六开关、第八开关、第九开关及第十四开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差与所述第三电容两端的电压差之和等于5/3倍所述输入电源的电压,所述输出电压等于8/3倍所述输入电源的电压。
其中,当所述第三开关、第五开关、第六开关、第八开关、第九开关及第十四开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关、第八开关及第十三开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差、所述第三电容两端的电压差与所述第四电容两端的电压差之和等于2倍所述输入电源的电压,所述输出电压等于3倍所述输入电源的电压。
其中,所述第一电容与所述第三电容的容值相同,所述第二电容与所述第四电容的容值相同,且所述第一电容、第二电容、第三电容与第四电容的容值 配比为1:2:1:2。
其中,所述第二电容由两个所述第一电容或两个所述第三电容并联形成,所述第四电容由两个所述第三电容或两个所述第一电容并联形成。
一种液晶显示驱动芯片,包括电压转换电路,所述电压转换电路包括电压转换模块及控制模块;
所述电压转换模块包括输入端、第一电容、第二电容、第三电容、第四电容、第一开关、第二开关、第三开关、第四开关、第五开关、第六开关、第七开关、第八开关、第九开关、第十开关、第十一开关、第十二开关、第十三开关及输出端;
所述第一开关、第二开关、第三开关、第四开关及第五开关的一端均与所述输入端连接,所述第一开关的另一端与所述第一电容的一端及所述第九开关的一端连接,所述第九开关的另一端接地,所述第一电容的另一端与所述第二开关的另一端、所述第六开关的一端及所述第十开关的一端连接,所述第六开关的另一端与所述第二电容的一端连接,所述第十开关的另一端与所述第十一开关的一端、所述第十二开关的一端、所述第十三开关的一端及所述输出端连接,所述第二电容的另一端与所述第三开关的另一端、所述第十一开关的另一端及所述第七开关的一端连接,所述第七开关的另一端与所述第三电容的一端连接,所述第三电容的另一端与所述第四开关的另一端、所述第十二开关的另一端及所述第八开关的一端连接,所述第八开关的另一端与所述第四电容的一端连接,所述第四电容的另一端与所述第五开关的另一端及所述第十三开关的另一端连接;
所述输入端用于连接输入电源,所述控制模块与所述电压转换模块连接,用于控制所述第一开关至所述第十三开关的导通或断开,所述电压转换模块用于在所述第一电容、第二电容、第三电容及第四电容的充电和放电作用下,将所述输入电源的电压转换为不同倍率的输出电压,并从所述输出端输出。
其中,所述电压转换模块还包括第四十开关,所述第十四开关的一端连接于所述第三电容与所述第七开关之间,所述第十四开关的另一端接地,所述控制模块还用于控制所述第四十开关的导通或断开。
其中,所述第一电容与所述第三电容的容值相同,所述第二电容与所述第四电容的容值相同,且所述第一电容、第二电容、第三电容与第四电容的容值配比为1:2:1:2。
其中,所述第二电容由两个所述第一电容或两个所述第三电容并联形成,所述第四电容由两个所述第三电容或两个所述第一电容并联形成。
所述电源转换电路通过设置所述第一电容、第二电容、第三电容、第四电容及所述第一开关至第十三开关,并通过所述控制模块控制所述第一开关至第十三开关的导通或断开来实现对所述第一电容、第二电容、第三电容及第四电容的充电和放电,实现了将所述输入电源的电压转换为多种不同倍率的输出电压,有利于提升电源转换效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的电压转换电路的结构示意图;
图2是本发明实施例提供的电压转换电路的第一充电状态示意图;
图3是本发明实施例提供的电压转换电路的第一放电状态示意图;
图4是本发明实施例提供的电压转换电路的第二充电状态示意图;
图5是本发明实施例提供的电压转换电路的第二放电状态示意图;
图6是本发明实施例提供的电压转换电路的第三充电状态示意图;
图7是本发明实施例提供的电压转换电路的第三放电状态示意图;
图8是本发明实施例提供的电压转换电路的第四充电状态示意图;
图9是本发明实施例提供的电压转换电路的第四放电状态示意图;
图10是本发明实施例提供的电压转换电路的第五充电状态示意图;
图11是本发明实施例提供的电压转换电路的第五放电状态示意图;
图12是本发明实施例提供的电压转换电路的第六充电状态示意图;
图13是本发明实施例提供的电压转换电路的第六放电状态示意图;
图14是本发明实施例提供的电压转换电路的第七充电状态示意图;
图15是本发明实施例提供的电压转换电路的第七放电状态示意图;
图16是本发明实施例提供的电压转换电路的第八充电状态示意图;
图17是本发明实施例提供的电压转换电路的第八放电状态示意图;
图18是本发明实施例提供的电压转换电路的第九充电状态示意图;
图19是本发明实施例提供的电压转换电路的第九放电状态示意图;
图20是本发明实施例提供的电压转换电路的第十充电状态示意图;
图21是本发明实施例提供的电压转换电路的第十放电状态示意图;
图22是本发明实施例提供的电压转换电路的第十一充电状态示意图;
图23是本发明实施例提供的电压转换电路的第十一放电状态示意图;
图24是本发明实施例提供的电压转换电路的第十二充电状态示意图;
图25是本发明实施例提供的电压转换电路的第十二放电状态示意图;
图26是本发明实施例提供的电压转换电路的充/放电状态的开关真值表。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
为便于描述,这里可以使用诸如“在…之下”、“在…下面”、“下”、“在…之上”、“上”等空间相对性术语来描述如图中所示的一个元件或特征与另一个(些)元件或特征的关系。可以理解,当一个元件或层被称为在另一元件或层“上”、“连接到”或“耦接到”另一元件或层时,它可以直接在另一元件或层上、直接连接到或耦接到另一元件或层,或者可以存在居间元件或层。相反,当一个元件被称为“直接在”另一元件或层上、“直接连接到”或“直接耦接到”另一元件或层时,不存在居间元件或层。
可以理解,这里所用的术语仅是为了描述特定实施例,并非要限制本发明。在这里使用时,除非上下文另有明确表述,否则单数形式“一”和“该”也旨在包括复数形式。进一步地,当在本说明书中使用时,术语“包括”和/或“包 含”表明所述特征、整体、步骤、操作、元件和/或组件的存在,但不排除一个或多个其他特征、整体、步骤、操作、元件、组件和/或其组合的存在或增加。
除非另行定义,这里使用的所有术语(包括技术术语和科学术语)都具有本发明所属领域内的普通技术人员所通常理解的相同含义。将进一步理解,诸如通用词典中所定义的术语,否则应当被解释为具有与它们在相关领域的语境中的含义相一致的含义,而不应被解释为理想化或过度形式化的意义,除非在此明确地如此定义。
请参阅图1,本发明第一实施例提供一种电压转换电路100,包括电压转换模块110及控制模块130;
所述电压转换模块110包括输入端111、第一电容C1、第二电容C2、第三电容C3、第四电容C4、第一开关S1、第二开关S2、第三开关S3、第四开关S4、第五开关S5、第六开关S6、第七开关S7、第八开关S8、第九开关S9、第十开关S10、第十一开关S11、第十二开关S12、第十三开关S13、第十四开关S14及输出端113;
所述第一开S1关、第二开关S2、第三开关S3、第四开关S4及第五开关S5的一端均与所述输入端111连接,所述第一开关S1的另一端与所述第一电容C1的一端及所述第九开关S9的一端连接,所述第九开关S9的另一端接地,所述第一电容C1的另一端与所述第二开关S2的另一端、所述第六开关S6的一端及所述第十开关S10的一端连接,所述第六开关S6的另一端与所述第二电容C2的一端连接,所述第十开关S10的另一端与所述第十一开关S11的一端、所述第十二开关S12的一端、所述第十三开关S13的一端及所述输出端113连接,所述第二电容C2的另一端与所述第三开关S3的另一端、所述第十一开关S11的另一端及所述第七开关S7的一端连接,所述第七开关S7的另一端与所述第三电容C3的一端及所述第十四开关S14的一端连接,所述第十四开关S14的另一端接地,所述第三电容C3的另一端与所述第四开关S4的另一端、所述第十二开关S12的另一端及所述第八开关S8的一端连接,所述第八开关S8的另一端与所述第四电容C4的一端连接,所述第四电容C4的另一端与所述第五开关S5的另一端及所述第十三开关S13的另一端连接;
所述输入端111用于连接输入电源Vin,所述控制模块130与所述电压转换模块110连接,用于控制所述第一开关S1至所述第十四开关S14的导通或断开,所述电压转换模块110用于在所述第一电容C1、第二电容C2、第三电容C3及第四电容C4的充电和放电作用下,将所述输入电源Vin的电压转换为不同倍率的输出电压,并从所述输出端113输出给对应的负载R。
在本实施例中,所述第一电容C1与所述第三电容C3的容值相同,所述第二电容与所述第四电容C4的容值相同,且所述第一电容C1、第二电容C2、第三电容C3与第四电容C4的容值配比为1:2:1:2。例如,所述第一电容C1与所述第三电容C3的容值可以为1uF,所述第二电容C2和所述第四电容C4的容值可以为2uF。可以理解,在可选实施方式中,所述第二电容C2可以由两个所述第一电容C1或两个所述第三电容C3并联形成,所述第四电容C4可以由两个所述第三电容C3或两个所述第一电容C1并联形成。
在本实施例中,所述控制模块130包括控制器(Control)131和晶体振荡器(OSC)133,所述控制器131与所述晶体振荡器133和所述电压转换模块110电连接,所述晶体振荡器133与所述电压转换模块110电连接,所述晶体振荡器133用于为所述控制器131提供工作时序信号,以触发所述控制131根据所述工作时序信号控制所述第一开关S1至所述第十四开关S14导通或断开,进而实现对所述述第一电容C1、第二电容C2、第三电容C3及第四电容C4的充电和放电操作。可以理解,所述电压转换电路100还可包括输入电容Cin及输出电容Cout,所述输入电容Cin一端与所述输入端111连接,另一端接地;所述输出电容Cout一端与所述输出端113连接,另一端接地。
请参阅图2,当所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第一充电状态。此时,所述第一电容C1、第二电容C2、第三电容C3及第四电容C4通过所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压与所述输入电源Vin的电压相 同,所述第四电容C4与所述第三电容C3连接的一端的电压等于5/6倍所述输入电源Vin的电压,所述第三电容C3与所述第二电容C2连接的一端的电压等于1/2倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/3倍所述输入电源Vin的电压。
请参阅图3,在所述第一充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第四开关S4、第八开关S8及第十三开关S13导通,其余开关断开时,形成所述电压转换电路的第一放电状态。此时,所述第四电容C4两端的电压差等于1/6倍所述输入电源Vin的电压,所述输出电压等于7/6倍所述输入电源Vin的电压。即,通过所述第一充电状态和所述第一放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.17倍所述输入电源Vin的电压输出。
请参阅图4,当所述第四开关S4、第六开关S6、第七开关S7及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2及第三电容C3进行充电,形成所述电压转换电路的第二充电状态。此时,所述第一电容C1、第二电容C2及第三电容C通过所述第四开关S4、第六开关S6、第七开关S7及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2及第三电容C3充电完成时,所述第三电容C3与所述第四开关S4连接的一端的电压与所述输入电源Vin的电压相同,所述第三电容C3与所述第二电容C2连接的一端的电压等于3/5倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/5倍所述输入电源Vin的电压。
请参阅图5,在所述第二充电状态完成对所述第一电容C1、第二电容C2及第三电容C3充电的基础上,当所述第二开关S2、第六开关S6及第十一开关S11导通,其余开关断开时,形成所述电压转换电路的第二放电状态。此时,所述第二电容C2两端的电压差等于1/5倍所述输入电源Vin的电压,所述输出电压等于6/5倍所述输入电源Vin的电压。即,通过所述第二充电状态和所述第二放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.2倍所述输入电源Vin的电压输出。
请参阅图6,当所述第五开关S5、第六开关S6、第七开关S7、第八开关 S8及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第三充电状态。此时,所述第一电容C1、第二电容C2、第三电容C3及第四电容C4通过所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压与所述输入电源Vin的电压相同,所述第四电容C4与所述第三电容C3连接的一端的电压等于5/6倍所述输入电源Vin的电压,所述第三电容C3与所述第二电容C2连接的一端的电压等于1/2倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/3倍所述输入电源Vin的电压。
请参阅图7,在所述第三充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第一开关S1及第十开关S10导通,其余开关断开时,形成所述电压转换电路的第三放电状态。此时,所述第一电容C1两端的电压差等于1/3倍所述输入电源Vin的电压,所述输出电压等于4/3倍所述输入电源Vin的电压。即,通过所述第三充电状态和所述第三放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.33倍所述输入电源Vin的电压输出。
请参阅图8,当所述第四开关S4、第六开关S4、第七开关S7及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2及第三电容C3进行充电,形成所述电压转换电路的第四充电状态。此时,所述第一电容C1、第二电容C2及第三电容C通过所述第四开关S4、第六开关S6、第七开关S7及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2及第三电容C3充电完成时,所述第三电容C3与所述第四开关S4连接的一端的电压与所述输入电源Vin的电压相同,所述第三电容C3与所述第二电容C2连接的一端的电压等于3/5倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/5倍所述输入电源Vin的电压。
请参阅图9,在所述第四充电状态完成对所述第一电容C1、第二电容C2 及第三电容C3充电的基础上,当所述第一开关S1及第十开关S10导通,其余开关断开时,形成所述电压转换电路的第四放电状态。此时,所述第一电容C1两端的电压差等于2/5倍所述输入电源Vin的电压,所述输出电压等于7/5倍所述输入电源Vin的电压。即,通过所述第四充电状态和所述第四放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.4倍所述输入电源Vin的电压输出。
请参阅图10,当所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第五充电状态。此时,所述第一电容C1、第二电容C2、第三电容C3及第四电容C4通过所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压与所述输入电源Vin的电压相同,所述第四电容C4与所述第三电容C3连接的一端的电压等于5/6倍所述输入电源Vin的电压,所述第三电容C3与所述第二电容C2连接的一端的电压等于1/2倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/3倍所述输入电源Vin的电压。
请参阅图11,在所述第五充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第一开关S1、第六开关S6及第十一开关S11导通,其余开关断开时,形成所述电压转换电路的第五放电状态。此时,所述第一电容C1两端的电压差与所述第二电容C2两端的电压差之和等于1/2倍所述输入电源Vin的电压,所述输出电压等于3/2倍所述输入电源Vin的电压。即,通过所述第五充电状态和所述第五放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.5倍所述输入电源Vin的电压输出。
请参阅图12,当所述第四开关S4、第六开关S4、第七开关S7及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2及第三电容C3进行充电,形成所述电压转换电路的第六充电状态。此 时,所述第一电容C1、第二电容C2及第三电容C通过所述第四开关S4、第六开关S6、第七开关S7及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2及第三电容C3充电完成时,所述第三电容C3与所述第四开关S4连接的一端的电压与所述输入电源Vin的电压相同,所述第三电容C3与所述第二电容C2连接的一端的电压等于3/5倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/5倍所述输入电源Vin的电压。
请参阅图13,在所述第六充电状态完成对所述第一电容C1、第二电容C2及第三电容C3充电的基础上,当所述第一开关S1、第六开关S6及第十一开关S11导通,其余开关断开时,形成所述电压转换电路的第六放电状态。此时,所述第一电容C1两端的电压差与所述第二电容C2两端的电压差之和等于3/5倍所述输入电源Vin的电压,所述输出电压等于8/5倍所述输入电源Vin的电压。即,通过所述第六充电状态和所述第六放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.6倍所述输入电源Vin的电压输出。
请参阅图14,当所述第三开关S3、第六开关S6及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1及第二电容C2进行充电,形成所述电压转换电路的第七充电状态。此时,所述第一电容C1及第二电容C2通过所述第三开关S3、第六开关S6及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1及第二电容C2充电完成时,所述第二电容C2与所述第三开关S3连接的一端的电压与所述输入电源Vin的电压相同,所述第二电容C2与所述第一电容C1连接的一端的电压等于2/3倍所述输入电源Vin的电压。
请参阅图15,在所述第七充电状态完成对所述第一电容C1及第二电容C2充电的基础上,当所述第一开关S1及第十开关S10导通,其余开关断开时,形成所述电压转换电路的第七放电状态。此时,所述第一电容C1两端的电压差等于2/3倍所述输入电源Vin的电压,所述输出电压等于5/3倍所述输入电源Vin的电压。即,通过所述第七充电状态和所述第七放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.67倍所述输入电源Vin的电压输出。
请参阅图16,当所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第八充电状态。此时,所述第一电容C1、第二电容C2、第三电容C3及第四电容C4通过所述第五开关S5、第六开关S6、第七开关S7、第八开关S8及第九开关S9串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压与所述输入电源Vin的电压相同,所述第四电容C4与所述第三电容C3连接的一端的电压等于5/6倍所述输入电源Vin的电压,所述第三电容C3与所述第二电容C2连接的一端的电压等于1/2倍所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于1/3倍所述输入电源Vin的电压。
请参阅图17,在所述第八充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第一开关S1、第六开关S6、第七开关S7及第十二开关S12导通,其余开关断开时,形成所述电压转换电路的第八放电状态。此时,所述第一电容C1两端的电压差、所述第二电容C2两端的电压差与所述第三电容C3两端的电压差之和等于5/6倍所述输入电源Vin的电压,所述输出电压等于11/6倍所述输入电源Vin的电压。即,通过所述第八充电状态和所述第八放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为1.83倍所述输入电源Vin的电压输出。
请参阅图18,当所述第二开关S2及第九开关S9导通,其余开关断开时,所述输入电源Vin对所述第一电容C1进行充电,形成所述电压转换电路的第九充电状态。此时,所述第一电容C1通过所述第二开关S2及第九开关S9连接于所述输入电源Vin的正极与地之间。当所述第一电容C1充电完成时,所述第一电容C1与所述第二开关S2连接的一端的电压等于所述输入电源Vin的电压。
请参阅图19,在所述第九充电状态完成对所述第一电容C1充电的基础上,当所述第一开关S1及第十开关S10导通,其余开关断开时,形成所述电压转换电路的第九放电状态。此时,所述第一电容C1两端的电压差等于所述输入 电源Vin的电压,所述输出电压等于2倍所述输入电源Vin的电压。即,通过所述第九充电状态和所述第九放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为2倍所述输入电源Vin的电压输出。
请参阅图20,当所述第三开关S3、第四开关S4、第六开关S6、第九开关S9及第十四开关S14导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2及第三电容C3进行充电,形成所述电压转换电路的第十充电状态。此时,所述第一电容C1及第二电容C2通过所述第三开关S3、第六开关S6及第九开关S9串联连接于所述输入电源Vin的正极与地之间,所述第三电容C3通过所述第四开关S4及所述第十四开关S14连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2及第三电容C3充电完成时,所述第三电容C3与所述第四开关S4连接的一端的电压等于所述输入电源Vin的电压,所述第二电容C2与所述第三开关S3连接的一端的电压等于所述输入电源Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于2/3倍所述输入电源Vin的电压。
请参阅图21,在所述第十充电状态完成对所述第一电容C1、第二电容C2及第三电容C3充电的基础上,当所述第二开关S2、第六开关S6、第七开关S7及第十二开关S12导通,其余开关断开时,形成所述电压转换电路的第十放电状态。此时,所述第二电容C2两端的电压差与所述第三电容C3两端的电压差之和等于4/3倍所述输入电源Vin的电压,所述输出电压等于7/3倍所述输入电源Vin的电压。即,通过所述第十充电状态和所述第十放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为2.33倍所述输入电源Vin的电压输出。
请参阅图22,当所述第三开关S3、第五开关S5、第六开关S6、第八开关S8、第九开关S9及第十四开关S14导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第十一充电状态。此时,所述第一电容C1及所述第二电容C2通过所述第三开关S3、第六开关S6及第九开关S9串联连接于所述输入电源Vin的正极与地之间,所述第三电容C3及所述第四电容C4通过所述第五开关S5、第八开关S8及第十四开关S14串联连接于所述输入电源Vin 的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压等于所述输入电压Vin的电压,所述第四电容C4与所述第三电容C3连接的一端的电压等于2/3倍所述输入电压Vin的电压,所述第二电容C2与所述第三开关S3连接的一端的电压等于所述输入电压Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于2/3倍所述输入电压Vin的电压。
请参阅图23,在所述第十一充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第一开关S1、第六开关S6、第七开关S7及第十二开关S12导通,其余开关断开时,形成所述电压转换电路的第十一放电状态。此时,所述第一电容C1两端的电压差、所述第二电容C2两端的电压差与所述第三电容C3两端的电压差之和等于5/3倍所述输入电源Vin的电压,所述输出电压等于8/3倍所述输入电源Vin的电压。即,通过所述第十一充电状态和所述第十一放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为2.67倍所述输入电源Vin的电压输出。
请参阅图24,当所述第三开关S3、第五开关S5、第六开关S6、第八开关S8、第九开关S9及第十四开关S14导通,其余开关断开时,所述输入电源Vin对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4进行充电,形成所述电压转换电路的第十二充电状态。此时,所述第一电容C1及所述第二电容C2通过所述第三开关S3、第六开关S6及第九开关S9串联连接于所述输入电源Vin的正极与地之间,所述第三电容C3及所述第四电容C4通过所述第五开关S5、第八开关S8及第十四开关S14串联连接于所述输入电源Vin的正极与地之间。当所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电完成时,所述第四电容C4与所述第五开关S5连接的一端的电压等于所述输入电压Vin的电压,所述第四电容C4与所述第三电容C3连接的一端的电压等于2/3倍所述输入电压Vin的电压,所述第二电容C2与所述第三开关S3连接的一端的电压等于所述输入电压Vin的电压,所述第二电容C2与所述第一电容C1连接的一端的电压等于2/3倍所述输入电压Vin的电压。
请参阅图25,在所述第十二充电状态完成对所述第一电容C1、第二电容C2、第三电容C3及第四电容C4充电的基础上,当所述第一开关S1、第六开 关S6、第七开关S7、第八开关S8及第十三开关S13导通,其余开关断开时,形成所述电压转换电路的第十二放电状态。此时,所述第一电容C1两端的电压差、所述第二电容C2两端的电压差、所述第三电容C3两端的电压差与所述第四电容C4两端的电压差之和等于2倍所述输入电源Vin的电压,所述输出电压等于3倍所述输入电源Vin的电压。即,通过所述第十二充电状态和所述第十二放电状态的切换,所述电压转换电路可以将所述输入电源Vin的电压转换为3倍所述输入电源Vin的电压输出。
请参阅图26,图中所示所述电压转换电路100在图2至图25所示十二组充/放电状态下的开关真值表。其中,mode栏位对应的是所述十二组充/放电状态所对应的十二种不同的输出电压,每一种输出电压对应的充电及放电状态的开关真值如图中所示,具体可参照图2至图25所示实施例中的相关描述,此处不再赘述。
本发明第二实施例提供一种液晶显示驱动芯片,包括如本发明第一实施例所述的电压转换电路100,所述电压转换电路100的具体结构及功能可以参照图2至图25所示实施例中的相关描述,此处不再赘述。
所述电源转换电路通过设置所述第一电容、第二电容、第三电容、第四电容及所述第一开关至第十四开关,并通过所述控制模块控制所述第一开关至第十四开关的导通或断开来实现对所述第一电容、第二电容、第三电容及第四电容的充电和放电,实现了将所述输入电源的电压转换为多种不同倍率的输出电压,有利于提升电源转换效率。
可以理解,以上所揭露的仅为本发明的较佳实施例而已,当然不能以此来限定本发明的权利范围,本领域普通技术人员可以理解实现上述实施例的全部或部分流程,并依本发明权利要求所作的等同变化,仍属于发明所涵盖的范围。

Claims (20)

  1. 一种电压转换电路,包括电压转换模块及控制模块;
    所述电压转换模块包括输入端、第一电容、第二电容、第三电容、第四电容、第一开关、第二开关、第三开关、第四开关、第五开关、第六开关、第七开关、第八开关、第九开关、第十开关、第十一开关、第十二开关、第十三开关及输出端;
    所述第一开关、第二开关、第三开关、第四开关及第五开关的一端均与所述输入端连接,所述第一开关的另一端与所述第一电容的一端及所述第九开关的一端连接,所述第九开关的另一端接地,所述第一电容的另一端与所述第二开关的另一端、所述第六开关的一端及所述第十开关的一端连接,所述第六开关的另一端与所述第二电容的一端连接,所述第十开关的另一端与所述第十一开关的一端、所述第十二开关的一端、所述第十三开关的一端及所述输出端连接,所述第二电容的另一端与所述第三开关的另一端、所述第十一开关的另一端及所述第七开关的一端连接,所述第七开关的另一端与所述第三电容的一端连接,所述第三电容的另一端与所述第四开关的另一端、所述第十二开关的另一端及所述第八开关的一端连接,所述第八开关的另一端与所述第四电容的一端连接,所述第四电容的另一端与所述第五开关的另一端及所述第十三开关的另一端连接;
    所述输入端用于连接输入电源,所述控制模块与所述电压转换模块连接,用于控制所述第一开关至所述第十三开关的导通或断开,所述电压转换模块用于在所述第一电容、第二电容、第三电容及第四电容的充电和放电作用下,将所述输入电源的电压转换为不同倍率的输出电压,并从所述输出端输出。
  2. 如权利要求1所述的电压转换电路,其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第四开关、第八开关及第十三开关导通,其余开关断开时,所述第四电容两端的电压差等于1/6倍所述输入电源的电压,所述输出电压等于7/6倍所述输入电源的电压。
  3. 如权利要求1所述的电压转换电路,其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第二开关、第六开关及第十一开关导通,其余开关断开时,所述第二电容两端的电压差等于1/5倍所述输入电源的电压,所述输出电压等于6/5倍所述输入电源的电压。
  4. 如权利要求1所述的电压转换电路,其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于1/3倍所述输入电源的电压,所述输出电压等于4/3倍所述输入电源的电压。
  5. 如权利要求1所述的电压转换电路,其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于2/5倍所述输入电源的电压,所述输出电压等于7/5倍所述输入电源的电压。
  6. 如权利要求1所述的电压转换电路,其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关及第十一开关导通,其余开关断开时,所述第一电容两端的电压差与所述第二电容两端的电压差之和等于1/2倍所述输入电源的电压,所述输出电压等于3/2倍所述输入电源的电压。
  7. 如权利要求1所述的电压转换电路,其中,当所述第四开关、第六开关、第七开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容及第三电容进行充电;当所述第一开关、第六开关及第十一开关 导通,其余开关断开时,所述第一电容两端的电压差与所述第二电容两端的电压差之和等于3/5倍所述输入电源的电压,所述输出电压等于8/5倍所述输入电源的电压。
  8. 如权利要求1所述的电压转换电路,其中,当所述第三开关、第六开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容及第二电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于2/3倍所述输入电源的电压,所述输出电压等于5/3倍所述输入电源的电压。
  9. 如权利要求1所述的电压转换电路,其中,当所述第五开关、第六开关、第七开关、第八开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差与所述第三电容两端的电压差之和等于5/6倍所述输入电源的电压,所述输出电压等于11/6倍所述输入电源的电压。
  10. 如权利要求1所述的电压转换电路,其中,当所述第二开关及第九开关导通,其余开关断开时,所述输入电源对所述第一电容进行充电;当所述第一开关及第十开关导通,其余开关断开时,所述第一电容两端的电压差等于所述输入电源的电压,所述输出电压等于2倍所述输入电源的电压。
  11. 如权利要求1所述的电压转换电路,其中,所述电压转换模块还包括第四十开关,所述第十四开关的一端连接于所述第三电容与所述第七开关之间,所述第十四开关的另一端接地,所述控制模块还用于控制所述第四十开关的导通或断开。
  12. 如权利要求11所述的电压转换电路,其中,当所述第三开关、第四开关、第六开关、第九开关及第十四开关导通,其余开关断开时,所述输入电 源对所述第一电容、第二电容及第三电容进行充电;当所述第二开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第二电容两端的电压差与所述第三电容两端的电压差之和等于4/3倍所述输入电源的电压,所述输出电压等于7/3倍所述输入电源的电压。
  13. 如权利要求11所述的电压转换电路,其中,当所述第三开关、第五开关、第六开关、第八开关、第九开关及第十四开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关及第十二开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差与所述第三电容两端的电压差之和等于5/3倍所述输入电源的电压,所述输出电压等于8/3倍所述输入电源的电压。
  14. 如权利要求11所述的电压转换电路,其中,当所述第三开关、第五开关、第六开关、第八开关、第九开关及第十四开关导通,其余开关断开时,所述输入电源对所述第一电容、第二电容、第三电容及第四电容进行充电;当所述第一开关、第六开关、第七开关、第八开关及第十三开关导通,其余开关断开时,所述第一电容两端的电压差、所述第二电容两端的电压差、所述第三电容两端的电压差与所述第四电容两端的电压差之和等于2倍所述输入电源的电压,所述输出电压等于3倍所述输入电源的电压。
  15. 如权利要求1所述的电压转换电路,其中,所述第一电容与所述第三电容的容值相同,所述第二电容与所述第四电容的容值相同,且所述第一电容、第二电容、第三电容与第四电容的容值配比为1:2:1:2。
  16. 如权利要求15所述的电压转换电路,其中,所述第二电容由两个所述第一电容或两个所述第三电容并联形成,所述第四电容由两个所述第三电容或两个所述第一电容并联形成。
  17. 一种液晶显示驱动芯片,包括电压转换电路,所述电压转换电路包括电压转换模块及控制模块;
    所述电压转换模块包括输入端、第一电容、第二电容、第三电容、第四电容、第一开关、第二开关、第三开关、第四开关、第五开关、第六开关、第七开关、第八开关、第九开关、第十开关、第十一开关、第十二开关、第十三开关及输出端;
    所述第一开关、第二开关、第三开关、第四开关及第五开关的一端均与所述输入端连接,所述第一开关的另一端与所述第一电容的一端及所述第九开关的一端连接,所述第九开关的另一端接地,所述第一电容的另一端与所述第二开关的另一端、所述第六开关的一端及所述第十开关的一端连接,所述第六开关的另一端与所述第二电容的一端连接,所述第十开关的另一端与所述第十一开关的一端、所述第十二开关的一端、所述第十三开关的一端及所述输出端连接,所述第二电容的另一端与所述第三开关的另一端、所述第十一开关的另一端及所述第七开关的一端连接,所述第七开关的另一端与所述第三电容的一端连接,所述第三电容的另一端与所述第四开关的另一端、所述第十二开关的另一端及所述第八开关的一端连接,所述第八开关的另一端与所述第四电容的一端连接,所述第四电容的另一端与所述第五开关的另一端及所述第十三开关的另一端连接;
    所述输入端用于连接输入电源,所述控制模块与所述电压转换模块连接,用于控制所述第一开关至所述第十三开关的导通或断开,所述电压转换模块用于在所述第一电容、第二电容、第三电容及第四电容的充电和放电作用下,将所述输入电源的电压转换为不同倍率的输出电压,并从所述输出端输出。
  18. 如权利要求17所述的液晶显示驱动芯片,其中,所述电压转换模块还包括第四十开关,所述第十四开关的一端连接于所述第三电容与所述第七开关之间,所述第十四开关的另一端接地,所述控制模块还用于控制所述第四十开关的导通或断开。
  19. 如权利要求17所述的液晶显示驱动芯片,其中,所述第一电容与所 述第三电容的容值相同,所述第二电容与所述第四电容的容值相同,且所述第一电容、第二电容、第三电容与第四电容的容值配比为1:2:1:2。
  20. 如权利要求19所述的液晶显示驱动芯片,其中,所述第二电容由两个所述第一电容或两个所述第三电容并联形成,所述第四电容由两个所述第三电容或两个所述第一电容并联形成。
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10720834B2 (en) * 2018-04-30 2020-07-21 Raydium Semiconductor Corporation Charge pump applied to organic light-emitting diode display pane
US10693370B1 (en) * 2019-05-08 2020-06-23 Marko Krstic Switched-capacitor converter with high step-up/step-down conversion ratio
CN112910220B (zh) * 2021-01-28 2023-07-25 维沃移动通信有限公司 电源装置及电子设备
CN113470590A (zh) * 2021-07-15 2021-10-01 Tcl华星光电技术有限公司 逻辑电路和显示面板
CN115864833B (zh) * 2022-12-09 2023-06-16 广东工业大学 一种内嵌型多电平的可重构开关电容变换器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060699A1 (en) * 2007-11-05 2009-05-14 Ricoh Company, Ltd. Operation control method of charge pump circuit
CN201904721U (zh) * 2010-12-29 2011-07-20 厦门联创微电子股份有限公司 一种升压电荷泵
US20150002214A1 (en) * 2011-01-18 2015-01-01 Peregrine Semiconductor Corporation Differential Charge Pump
CN104410271A (zh) * 2014-12-17 2015-03-11 南京航空航天大学 一种用三个飞跨电容实现的五转换比电荷泵多相交织技术
CN104781745A (zh) * 2012-10-16 2015-07-15 北极砂技术有限公司 具有级联驱动器的开关式电容电路的预充电

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100256251B1 (ko) * 1997-06-30 2000-05-15 김영환 이중 샘플링 아날로그 저역 통과 필터
JP2008042979A (ja) * 2006-08-02 2008-02-21 Rohm Co Ltd 半導体集積回路およびそれを備えた電子機器
US20110317456A1 (en) * 2008-05-01 2011-12-29 Tseng Tang-Kuei Optimum structure for charge pump circuit with bipolar output
US8044706B2 (en) * 2009-10-09 2011-10-25 Dialog Semiconductor Gmbh Reduced capacitor charge-pump
KR20110106686A (ko) * 2010-03-23 2011-09-29 삼성전자주식회사 차지 펌프, 그 제어 방법, 및 이를 구비한 디스플레이 구동 시스템
JP6541675B2 (ja) * 2014-02-24 2019-07-10 シグニファイ ホールディング ビー ヴィ 拡張動作範囲を有する駆動回路

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060699A1 (en) * 2007-11-05 2009-05-14 Ricoh Company, Ltd. Operation control method of charge pump circuit
CN101765963A (zh) * 2007-11-05 2010-06-30 株式会社理光 电荷泵电路的操作控制方法
CN201904721U (zh) * 2010-12-29 2011-07-20 厦门联创微电子股份有限公司 一种升压电荷泵
US20150002214A1 (en) * 2011-01-18 2015-01-01 Peregrine Semiconductor Corporation Differential Charge Pump
CN104781745A (zh) * 2012-10-16 2015-07-15 北极砂技术有限公司 具有级联驱动器的开关式电容电路的预充电
CN104410271A (zh) * 2014-12-17 2015-03-11 南京航空航天大学 一种用三个飞跨电容实现的五转换比电荷泵多相交织技术

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