CN113162386B - Reference voltage soft start circuit suitable for boost conversion circuit - Google Patents
Reference voltage soft start circuit suitable for boost conversion circuit Download PDFInfo
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- CN113162386B CN113162386B CN202110253381.4A CN202110253381A CN113162386B CN 113162386 B CN113162386 B CN 113162386B CN 202110253381 A CN202110253381 A CN 202110253381A CN 113162386 B CN113162386 B CN 113162386B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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Abstract
The application discloses a reference voltage soft start circuit suitable for a boost conversion circuit, which comprises a self-starting oscillation circuit module, a control time generation circuit module and a capacitor charging circuit module; the first end of the self-starting oscillating circuit module is connected with a reference voltage, the second end of the self-starting oscillating circuit module is connected with the first end of the control time generating circuit module, the second end of the control time generating circuit module is connected with the first end of the capacitor charging circuit module, the third end of the control time generating circuit module is connected with the voltage input end of the boost conversion circuit, and the second end of the capacitor charging circuit module is grounded; the application has the advantages of wide working voltage range, high integration level, small area, low power consumption and the like, and can be suitable for soft start of the boost converter circuit, thereby ensuring normal start of the boost converter circuit; the application can be widely applied to the technical field of integrated circuits.
Description
Technical Field
The application relates to the field of integrated circuits, in particular to a reference voltage soft start circuit suitable for a boost conversion circuit.
Background
With the increasing demand for portable electronic products, the demand for power management chips is also expanding. The boost converter circuit is widely used because of its high load capacity, low start voltage and high working efficiency. In the starting working stage of the boost conversion circuit, the problems that the circuit cannot boost, the output voltage overshoots, the current is too large, elements are burnt out and the like occur due to the fact that the loop feedback establishment time is too short and the initial output feedback is too low. The soft start circuit is a solution to the problem that the boost conversion circuit cannot be started normally, and the soft start circuit provides enough soft start time for the boost conversion circuit by slowing down the output change of the feedback loop operational amplifier, so that the normal start of the boost conversion circuit is ensured, and the problems of overshoot of output voltage and overlarge inductance current are prevented. However, the traditional soft start circuit has the defects of low circuit integration level, overlarge circuit area, overlarge circuit power consumption and the like.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a reference voltage soft start circuit suitable for a boost conversion circuit.
The technical scheme adopted by the application is as follows:
the application comprises a reference voltage soft start circuit suitable for a boost conversion circuit, which comprises a self-starting oscillation circuit module, a control time generation circuit module and a capacitor charging circuit module; the first end of the self-starting oscillating circuit module is connected with a reference voltage, the second end of the self-starting oscillating circuit module is connected with the first end of the control time generating circuit module, the second end of the control time generating circuit module is connected with the first end of the capacitor charging circuit module, the third end of the control time generating circuit module is connected with the voltage input end of the boost conversion circuit, and the second end of the capacitor charging circuit module is grounded;
the self-starting oscillating circuit module is used for generating a low-voltage control signal;
the control time generation circuit module comprises a level conversion circuit unit and a narrow pulse generation circuit unit, wherein the level conversion circuit unit is used for carrying out level conversion on the low-voltage control signal to obtain a first control signal, and the narrow pulse generation circuit unit is used for accessing the first control signal and generating a corresponding narrow pulse control signal;
the capacitor charging circuit module is used for slowly charging the capacitor to a preset reference voltage according to the narrow pulse control signal.
Further, a first end of the level conversion circuit unit is connected with a second end of the self-starting oscillation circuit module, a second end of the level conversion circuit unit is connected with a first end of the narrow pulse generation circuit unit, and a second end of the narrow pulse generation circuit unit is connected with a first end of the capacitor charging circuit module.
Further, the self-starting oscillation circuit module comprises a plurality of inverters and a driving circuit, wherein the inverters are connected in series, and the output end of the driving circuit is the second end of the self-starting oscillation circuit module.
Further, the number of the inverters is an odd number.
Further, the self-starting oscillation circuit module comprises a first inverter, a second inverter, a third inverter, a fourth inverter, a fifth inverter and a driving circuit, wherein the first end of the first inverter is connected with the second end of the fifth inverter, the second end of the first inverter is connected with the first end of the second inverter, the second end of the second inverter is connected with the first end of the third inverter, the second end of the third inverter is connected with the first end of the fourth inverter, the second end of the fourth inverter is connected with the first end of the fifth inverter, and the second end of the fifth inverter is connected with the input end of the driving circuit.
Further, each inverter is connected to a reference voltage, and the driving circuit is also connected to the reference voltage.
Further, the capacitor charging circuit module comprises a first PMOS tube, a second PMOS tube, a first switch and a capacitor; the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first PMOS tube is connected with the drain electrode of the first PMOS tube and is commonly connected with reference current, the source electrode of the first PMOS tube and the source electrode of the second PMOS tube are connected with reference voltage, the drain electrode of the second PMOS tube is connected with the first end of the first switch, the second end of the first switch is connected with the first end of the capacitor, and the second end of the capacitor is grounded.
Further, the narrow pulse control signal is used for controlling the on and off of the first switch.
Further, the first PMOS tube and the second PMOS tube form a current mirror structure.
The beneficial effects of the application are as follows:
(1) The self-starting oscillation circuit module is adopted and is used for spontaneously generating a low-voltage control signal matched with the reference voltage; the integrated level of the circuit is increased without adding a control clock, and the design complexity of the off-chip circuit is reduced;
(2) The application adopts the narrow pulse generating circuit unit to be connected into the first control signal and generate the corresponding narrow pulse control signal to be used as the control signal for capacitor charging, thereby reducing the use of off-chip large capacitors, increasing the integration level of the circuit and reducing the consumption area of the circuit;
(3) The self-starting oscillating circuit module, the control time generating circuit module and the capacitor charging circuit module are combined with analog-digital signals, so that the stability of the circuit in the working process is improved, the applicability of the circuit is improved, and the power consumption of the circuit is reduced.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a circuit diagram of a control architecture of a boost converter circuit according to an embodiment of the present application;
FIG. 2 is a circuit diagram of a soft start reference voltage circuit according to an embodiment of the present application;
FIG. 3 is a circuit diagram of a self-starting oscillation circuit module according to an embodiment of the present application;
fig. 4 is a circuit configuration diagram of a control time generation circuit module according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Embodiments of the present application will be further described below with reference to the accompanying drawings.
Referring to fig. 1, first, a main body architecture of a boost conversion circuit is described, where the boost conversion circuit includes a dc power supply, an inductor, a high-side power switching tube, a low-side power switching tube, a capacitor, a first resistor, a second resistor, and a third resistor; the first end of the direct current power supply is connected with the first end of the high-side power switch tube through the inductance coil, the first end of the direct current power supply is connected with the first end of the low-side power switch tube through the inductance coil, the second end of the low-side power switch tube is connected with the second end of the direct current power supply, the second end of the high-side power switch tube is respectively connected with the first end of the capacitor, the first end of the first resistor and the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, and the second end of the capacitor, the second end of the first resistor and the second end of the third resistor are all connected with the second end of the direct current power supply; the output end of the reference voltage soft start circuit is connected between the second resistor and the third resistor so as to realize soft start of the boost conversion circuit and ensure normal start of the boost conversion circuit.
Referring to fig. 2, an embodiment of the present application provides a reference voltage soft start circuit suitable for a boost converter circuit, including a self-starting oscillation circuit module, a control time generating circuit module, and a capacitor charging circuit module; the first end of the self-starting oscillation circuit module is connected with a reference voltage, the second end of the self-starting oscillation circuit module is connected with the first end of the control time generation circuit module, the second end of the control time generation circuit module is connected with the first end of the capacitor charging circuit module, and the third end of the control time generation circuit module is connected with the voltage input end of the boost conversion circuit;
the self-starting oscillating circuit module is used for generating a low-voltage control signal;
the control time generation circuit module comprises a level conversion circuit unit and a narrow pulse generation circuit unit, wherein the level conversion circuit unit is used for carrying out level conversion on the low-voltage control signal to obtain a first control signal, and the narrow pulse generation circuit unit is used for accessing the first control signal and generating a corresponding narrow pulse control signal;
the capacitor charging circuit module is used for slowly charging the capacitor to a preset reference voltage according to the narrow pulse control signal.
Specifically, the self-starting oscillation circuit module comprises a first inverter, a second inverter, a third inverter, a fourth inverter, a fifth inverter and a driving circuit, wherein the first end of the first inverter is connected with the second end of the fifth inverter, the second end of the first inverter is connected with the first end of the second inverter, the second end of the second inverter is connected with the first end of the third inverter, the second end of the third inverter is connected with the first end of the fourth inverter, the second end of the fourth inverter is connected with the first end of the fifth inverter, and the second end of the fifth inverter is connected with the input end of the driving circuit.
Referring to fig. 3, in the present embodiment, the self-starting oscillation circuit module includes an inverter INV 1 Inverter INV 2 Inverter INV 3 Inverter INV 4 Inverter INV 5 A driving circuit BUFFER; the inverter INV 1 Output end of (a) and inverter INV 2 Is connected with the input end of the inverter INV 2 Output end of (a) and inverter INV 3 Is connected with the input end of the inverter INV 3 Output end of (a) and inverter INV 4 Is connected with the input end of the inverter INV 4 Output end of (a) and inverter INV 5 Is connected with the input end of the inverter INV 5 Output end of (a) and inverter INV 1 Is connected with the input end of the inverter INV 5 The output end of the self-starting oscillation circuit module is the output OSC of the driving circuit BUFFER LOW The output is connected to the input of the control time generation circuit module, and the power supply input of the self-starting oscillation circuit is connected to the reference voltage.
In this embodiment, the self-starting oscillation circuit module will induce the power-on jump of the reference voltage, and start to oscillate under the power supply of the reference voltage, and the oscillation signal will be used as the input of the control time signal through the driving of the driving circuit, so as to ensure the self-starting and stable supply of the control signal in the working process of the soft start circuit, and ensure the normal working of the soft start circuit.
Specifically, a first end of the level conversion circuit unit is connected with a second end of the self-starting oscillation circuit module, a second end of the level conversion circuit unit is connected with a first end of the narrow pulse generation circuit unit, and a second end of the narrow pulse generation circuit unit is connected with a first end of the capacitor charging circuit module.
Referring to fig. 4, in this embodiment, the control time generating circuit module includes a level converting circuit unit and a narrow pulse generating circuit unit, the level converting circuit unit will first receive an oscillating signal from the self-starting oscillating circuit module, and level convert the oscillating signal, raise the high level amplitude of the control signal on the basis of maintaining the frequency of the oscillating signal, ensure that the amplitude of the final output control signal can control the switch to be turned on and off, and the signal after the level conversion is a first control signal, and the first control signal is input to the narrow pulse generating circuit unit for converting the first control signal into a narrow pulse control signal with a corresponding frequency.
Specifically, the capacitor charging circuit module comprises a first PMOS tube, a second PMOS tube, a first switch and a capacitor; the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first PMOS tube is connected with the drain electrode of the first PMOS tube and is commonly connected with reference current, the source electrode of the first PMOS tube and the source electrode of the second PMOS tube are connected with reference voltage, the drain electrode of the second PMOS tube is connected with the first end of the first switch, the second end of the first switch is connected with the first end of the capacitor, and the second end of the capacitor is grounded; the first PMOS tube and the second PMOS tube form a current mirror structure.
In this embodiment, the capacitor charging circuit module includes PMOS transistors PM0 and PM1, and further includes a switch Y 0 Capacitor C 0 The method comprises the steps of carrying out a first treatment on the surface of the The grid electrodes of the PMOS tube PM0 and the PMOS tube PM1 are connected with each other, meanwhile, the grid electrode of the PMOS tube PM0 is connected with the drain electrode and is connected with a reference current together, and the source electrode of the PMOS tube PM0 and the source electrode of the PMOS tube PM1 are connected with the reference voltage and form a current mirror structure; drain electrode of PMOS tube PM1 and switch Y At 0 Is connected to one end of capacitor C 0 Will be connected with switch Y 0 Is connected to the other end of the housing.
In this embodiment, the capacitor charging circuit module will receive the output control signal from the control time generating circuit module, i.e. the narrow pulse control signal; the signal is input to a switch signal control input end of the capacitor charging circuit module and is used for controlling the connection and disconnection of a capacitor charging current switch, so that the capacitor is driven to be slowly charged to a reference voltage, and finally, the soft start process of the reference voltage is realized.
Specifically, the working flow of the reference voltage soft start circuit suitable for the boost conversion circuit is as follows:
(1) The self-starting oscillating circuit module mainly comprises an odd number of inverters and a driving circuit; when the reference voltage is in power-on jump, the self-starting oscillation circuit module senses the jump and oscillates under the power supply of the reference voltage, and a signal generated by oscillation is shaped and driven by the driving circuit to obtain a low-amplitude rectangular wave pulse with a certain frequency;
(2) The low-amplitude rectangular wave pulse generated by the self-starting oscillation circuit module is firstly input into the control time generation circuit module, and the low-amplitude rectangular wave pulse can be converted into high-amplitude rectangular wave pulse with corresponding frequency through the level conversion circuit unit so as to ensure that a final control signal controls a charging switch; the high-amplitude rectangular wave pulse will act on the narrow pulse generating circuit unit, assuming that the frequency of the high-amplitude rectangular wave pulse is f s The delay circuit generates a time difference of Deltat, so that the narrow pulse circuit will generate a frequency f s Pulse control signal with delay time delta t;
(3) Under the action of the narrow pulse control signal, the capacitor starts to charge, and the reference voltage value is assumed to be V REF Capacitance value is C REF The charging current is I REF And if the charging time is T, calculating the relationship of the variables:
meanwhile, since the delay circuit generates a time difference Δt, that is, a narrow pulse width Δt, the number of required pulses NUM can be expressed as:
therefore, the circuit realizes soft start of the circuit by controlling the capacitor charge, and finally ensures normal start of the boost conversion circuit, and avoids the problems of overshoot of output and burning out elements due to overlarge current.
The reference voltage soft start circuit suitable for the boost conversion circuit has the following technical effects:
(1) The embodiment of the application adopts a self-starting oscillation circuit module which is used for spontaneously generating a low-voltage control signal matched with the reference voltage; the integrated level of the circuit is increased without adding a control clock, and the design complexity of the off-chip circuit is reduced;
(2) The embodiment of the application adopts the narrow pulse generation circuit unit to be connected into the first control signal and generate the corresponding narrow pulse control signal to be used as the control signal for capacitor charging, thereby reducing the use of off-chip large capacitors, increasing the integration level of the circuit and reducing the consumption area of the circuit;
(3) The embodiment of the application comprises a self-starting oscillation circuit module, a control time generation circuit module and a plurality of digitizing modules of a capacitor charging circuit module, and combines analog-digital signals, thereby improving the stability of the circuit in the working process, increasing the applicability of the circuit and reducing the power consumption of the circuit.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application.
Claims (7)
1. The reference voltage soft start circuit suitable for the boost conversion circuit is characterized by comprising a self-starting oscillation circuit module, a control time generation circuit module and a capacitor charging circuit module; the first end of the self-starting oscillating circuit module is connected with a reference voltage, the second end of the self-starting oscillating circuit module is connected with the first end of the control time generating circuit module, the second end of the control time generating circuit module is connected with the first end of the capacitor charging circuit module, the third end of the control time generating circuit module is connected with the voltage input end of the boost conversion circuit, and the second end of the capacitor charging circuit module is grounded;
the self-starting oscillating circuit module is used for generating a low-voltage control signal;
the control time generation circuit module comprises a level conversion circuit unit and a narrow pulse generation circuit unit, wherein the level conversion circuit unit is used for carrying out level conversion on the low-voltage control signal to obtain a first control signal, and the narrow pulse generation circuit unit is used for accessing the first control signal and generating a corresponding narrow pulse control signal;
the capacitor charging circuit module is used for slowly charging the capacitor to a preset reference voltage according to the narrow pulse control signal;
the self-starting oscillating circuit module comprises a plurality of inverters and a driving circuit, wherein the inverters are connected in series, and the output end of the driving circuit is the second end of the self-starting oscillating circuit module;
the capacitor charging circuit module comprises a first PMOS tube, a second PMOS tube, a first switch and a capacitor; the grid electrode of the first PMOS tube is connected with the grid electrode of the second PMOS tube, the grid electrode of the first PMOS tube is connected with the drain electrode of the first PMOS tube and is commonly connected with reference current, the source electrode of the first PMOS tube and the source electrode of the second PMOS tube are connected with reference voltage, the drain electrode of the second PMOS tube is connected with the first end of the first switch, the second end of the first switch is connected with the first end of the capacitor, and the second end of the capacitor is grounded.
2. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
the first end of the level conversion circuit unit is connected with the second end of the self-starting oscillation circuit module, the second end of the level conversion circuit unit is connected with the first end of the narrow pulse generation circuit unit, and the second end of the narrow pulse generation circuit unit is connected with the first end of the capacitor charging circuit module.
3. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
the number of the inverters is an odd number.
4. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
the self-starting oscillating circuit module comprises a first inverter, a second inverter, a third inverter, a fourth inverter, a fifth inverter and a driving circuit, wherein the first end of the first inverter is connected with the second end of the fifth inverter, the second end of the first inverter is connected with the first end of the second inverter, the second end of the second inverter is connected with the first end of the third inverter, the second end of the third inverter is connected with the first end of the fourth inverter, the second end of the fourth inverter is connected with the first end of the fifth inverter, and the second end of the fifth inverter is connected with the input end of the driving circuit.
5. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
each inverter is connected with a reference voltage, and the driving circuit is also connected with the reference voltage.
6. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
the narrow pulse control signal is used for controlling the on and off of the first switch.
7. A reference voltage soft start circuit for a boost converter circuit according to claim 1,
the first PMOS tube and the second PMOS tube form a current mirror structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110253381.4A CN113162386B (en) | 2021-03-05 | 2021-03-05 | Reference voltage soft start circuit suitable for boost conversion circuit |
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| CN202110253381.4A CN113162386B (en) | 2021-03-05 | 2021-03-05 | Reference voltage soft start circuit suitable for boost conversion circuit |
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| CN113162386B true CN113162386B (en) | 2023-09-26 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377480B1 (en) * | 2001-01-18 | 2002-04-23 | Hitachi, Ltd. | Soft start circuit for switching power supply |
| CN103647440A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Soft-start circuit and DC-DC circuit including soft-start circuit |
| US20150162830A1 (en) * | 2013-12-05 | 2015-06-11 | Texas Instruments Incorporated | Power converter soft start circuit |
| CN106505849A (en) * | 2016-12-24 | 2017-03-15 | 成都卓创科微电子有限公司 | A kind of controllable linear soft starting circuit of time |
| CN110380602A (en) * | 2019-07-26 | 2019-10-25 | 佛山中科芯蔚科技有限公司 | A kind of DC-DC converter based on soft start |
| CN112260530A (en) * | 2020-12-22 | 2021-01-22 | 深圳英集芯科技股份有限公司 | Power supply soft start control circuit, control chip and control device |
-
2021
- 2021-03-05 CN CN202110253381.4A patent/CN113162386B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6377480B1 (en) * | 2001-01-18 | 2002-04-23 | Hitachi, Ltd. | Soft start circuit for switching power supply |
| CN103647440A (en) * | 2013-11-08 | 2014-03-19 | 上海华力微电子有限公司 | Soft-start circuit and DC-DC circuit including soft-start circuit |
| US20150162830A1 (en) * | 2013-12-05 | 2015-06-11 | Texas Instruments Incorporated | Power converter soft start circuit |
| CN106505849A (en) * | 2016-12-24 | 2017-03-15 | 成都卓创科微电子有限公司 | A kind of controllable linear soft starting circuit of time |
| CN110380602A (en) * | 2019-07-26 | 2019-10-25 | 佛山中科芯蔚科技有限公司 | A kind of DC-DC converter based on soft start |
| CN112260530A (en) * | 2020-12-22 | 2021-01-22 | 深圳英集芯科技股份有限公司 | Power supply soft start control circuit, control chip and control device |
Non-Patent Citations (1)
| Title |
|---|
| 一种用于升压型DC-DC变换器的新型软启动电路;付贤松等;《固体电子学研究与进展》;第38卷(第5期);第367-371、387页 * |
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