CN202150695U - Surge current suppression circuit - Google Patents
Surge current suppression circuit Download PDFInfo
- Publication number
- CN202150695U CN202150695U CN201120266052U CN201120266052U CN202150695U CN 202150695 U CN202150695 U CN 202150695U CN 201120266052 U CN201120266052 U CN 201120266052U CN 201120266052 U CN201120266052 U CN 201120266052U CN 202150695 U CN202150695 U CN 202150695U
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Abstract
The utility model relates to a surge current suppression circuit comprising a voltage input end, a DC-DC (Direct Current) boost circuit and a voltage output end, wherein the DC-DC boost circuit is provided with a voltage input pin, two voltage output pins, and an enabling input pin; the voltage input pin is electrically connected to the voltage input end, the voltage output pins are electrically connected to the voltage output end, an inductor is connected between the voltage input pin and the voltage output pins; and the surge current suppression circuit also comprises a pulse-width modulator which is connected with the enabling input pin. The surge current suppression circuit of the utility model employs the pulse-width modulator to control the enabling input pin and divide the time when the surge current occurs into several sections, thus when the surge current begins to go up, the enabling input pin is closed, and a peak value of the surge current is smoothed, so as to achieve the purpose of resisting the surge current. The surge current suppression circuit of the utility model can well realize the purpose of suppressing the surge current without changing a structure of the boost circuit, and has the advantages of simple design and convenient use.
Description
Technical field
The utility model relates to surge current suppression circuit, is specifically related to consumer electronics product and with the DC/DC that boosts power supply is carried out the surge current suppression circuit in the booster circuit.
Background technology
In now a lot of designs, particularly in the consumer electronics product, all can use the DC/DC circuit that boosts power supply is boosted, to satisfy the design for scheme demand.In the general booster circuit,, can flow through the surge current that surpasses 2A more than 20 microseconds even can reach 3A, 4A on the inductance when enabling the moment that input pin is opened of booster circuit.If the load after particularly boosting is the time spent not, usually give the power supply of load and cut off, to reach purpose of power saving, in this case, open and enable input pin, then surge current can be bigger.The long-term use on the one hand, might be caused the collapse of power-supply system; On the other hand, reduce the useful life of device.
The utility model content
To the deficiency of prior art, the purpose of the utility model is intended to provide the surge current suppression circuit that resists the high surge current that produces when booster circuit is opened.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
Surge current suppression circuit; Comprise voltage input end, DC-DC booster circuit, voltage output end; Said DC-DC booster circuit is provided with a voltage input pin, two voltage output pins, and one enables input pin; Said voltage input pin and voltage input end electrically connect, and said voltage output pin is connected with the voltage output end circuit.Be connected with an inductance between said voltage input pin and the voltage output pin, also comprise a pulse-width modulator, said pulse-width modulator with enable input pin and link to each other.
As improvement, said DC-DC booster circuit also comprises the voltage stabilizing didoe that is arranged between said voltage output pin and the voltage output end.
Preferably, said DC-DC booster circuit comprises that also one starts input pin, a pressure reduction adjuster output pin slowly, and the said input pin that starts slowly is through capacitor C 2 ground connection, and said pressure reduction adjuster output pin is through capacitor C 3 ground connection.
Preferably, said DC-DC booster circuit also comprises the limit switch pin that opens the door, two power ground pins, three signal ground pins, the said limit switch pin that opens the door, power ground pin, the equal ground connection of signal ground pin.
Preferably, said DC-DC booster circuit also comprises error amplifier output pin, capacitor C 4, capacitor C 5, resistance R 2, and said error amplifier output pin is connected in the two ends of capacitor C 5 through capacitor C 5 ground connection after said resistance R 2 is connected with capacitor C 4.
Preferably; Said DC-DC booster circuit also comprises a feedback input pin, capacitor C 6, capacitor C 7, resistance R 1, resistance R 3; Parallelly connected with capacitor C 6, C7 respectively after said resistance R 1 and resistance R 3 series connection; Said feedback input pin is connected to voltage output end through resistance R 1, and said feedback input pin is through resistance R 3 ground connection.
The surge current suppression circuit that the utility model is set forth; Compared with prior art; Its beneficial effect is: the utility model adopts pulse-width modulator to go control to enable input pin; That is: being divided into several sections in the time that surge current occurs, pulse-width modulator is the switch enable input pin ceaselessly, pulls into low level enabling input pin more at last.When surge current begins up to dash, just close like this, repeat several cycles, scabble the peak value of surge current, to reach the purpose that resists surge current enabling input pin.Need not change the structure of DC-DC booster circuit, only need to introduce the pulse-width modulator interface enabling the input pin place, simplicity of design, easy to use can realize suppressing the purpose of surge current well.
Description of drawings
Embodiment
Below, in conjunction with accompanying drawing and embodiment, the surge current suppression circuit of the utility model done further describing, so that clearerly understand the utility model technological thought required for protection.
As shown in Figure 1; Surge current suppression circuit; Comprise the DC-DC booster circuit, said DC-DC booster circuit is used MP1517 type dc voltage conversion chip always, and the voltage input pin IN of voltage input end and DC-DC booster circuit electrically connects; The voltage output pin SW of voltage output end and DC-DC booster circuit electrically connects; In order to make the voltage transformation precision higher, connect a filter capacitor C1 at voltage input end and carry out filtering, between voltage output end and voltage output pin SW, introduce a voltage stabilizing didoe D and carry out voltage stabilizing.In the utility model; Dc voltage conversion chip MP1517 is the inductance type booster circuit; Between voltage input pin IN and voltage output pin SW, be provided with an inductance L, when opening, can flow through the above 2A of surpassing of 20 microseconds on the inductance L even can reach the surge current of 3A, 4A in order to suppress to enable input pin EN; Enabling to introduce a pulse-width modulator PWM on the input pin EN; Pulse-width modulator PWM cuts into some with the time that surge current occurs, and pulse-width modulator PWM is the switch enable input pin ceaselessly, pulls into low level enabling input pin EN more at last.When surge current begins up to dash, just close like this, repeat several cycles, scabble the peak value of surge current, to reach the purpose that resists surge current enabling input pin EN.The DC-DC booster circuit comprises that also one starts input pin SS, a pressure reduction adjuster output pin BP slowly, starts input pin SS slowly through capacitor C 2 ground connection, and pressure reduction adjuster output pin BP is through capacitor C 3 ground connection.The DC-DC booster circuit also comprises the limit switch pin OLS that opens the door, two power ground pin PGND, three signal ground pin SGND, the limit switch pin OLS that opens the door, power ground pin PGND and the equal ground connection of signal ground pin SGND.Said DC-DC booster circuit also comprises error amplifier output pin COMP, capacitor C 4, capacitor C 5, resistance R 2, and error amplifier output pin COMP is connected in the two ends of capacitor C 5 through capacitor C 5 ground connection after resistance R 2 is connected with capacitor C 4.The DC-DC booster circuit also comprises a feedback input pin FB, capacitor C 6, capacitor C 7, resistance R 1, resistance R 3; Parallelly connected with capacitor C 6, C7 respectively after said resistance R 1 and resistance R 3 series connection; Feedback input pin FB is connected to voltage output end through resistance R 1, and feedback input pin FB is through resistance R 3 ground connection.Comprise also in the DC-DC booster circuit that in addition several unsettled nothings connect pin NC.
For a person skilled in the art, can make other various corresponding changes and distortion, and these all changes and distortion should belong within the protection range of the utility model claim all according to the technical scheme and the design of above description.
Claims (6)
1. surge current suppression circuit comprises voltage input end, DC-DC booster circuit, voltage output end, and said DC-DC booster circuit is provided with a voltage input pin; Two voltage output pins; One enables input pin, and said voltage input pin and voltage input end electrically connect, and said voltage output pin is connected with the voltage output end circuit; Be connected with an inductance between said voltage input pin and the voltage output pin; It is characterized in that, also comprise a pulse-width modulator, said pulse-width modulator with enable input pin and link to each other.
2. surge current suppression circuit as claimed in claim 1 is characterized in that, said DC-DC booster circuit also comprises the voltage stabilizing didoe that is arranged between said voltage output pin and the voltage output end.
3. surge current suppression circuit as claimed in claim 1; It is characterized in that; Said DC-DC booster circuit comprises that also one starts input pin, a pressure reduction adjuster output pin slowly; The said input pin that starts slowly is through capacitor C 2 ground connection, and said pressure reduction adjuster output pin is through capacitor C 3 ground connection.
4. surge current suppression circuit as claimed in claim 3; It is characterized in that; Said DC-DC booster circuit also comprises the limit switch pin that opens the door, two power ground pins, three signal ground pins, the said limit switch pin that opens the door, power ground pin, the equal ground connection of signal ground pin.
5. surge current suppression circuit as claimed in claim 3; It is characterized in that; Said DC-DC booster circuit also comprises error amplifier output pin, capacitor C 4, capacitor C 5, resistance R 2; Said error amplifier output pin is connected in the two ends of capacitor C 5 through capacitor C 5 ground connection after said resistance R 2 is connected with capacitor C 4.
6. surge current suppression circuit as claimed in claim 3; It is characterized in that; Said DC-DC booster circuit also comprises a feedback input pin, capacitor C 6, capacitor C 7, resistance R 1, resistance R 3; Parallelly connected with capacitor C 6, C7 respectively after said resistance R 1 and resistance R 3 series connection, said feedback input pin is connected to voltage output end through resistance R 1, and said feedback input pin passes through resistance R 3 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120266052U CN202150695U (en) | 2011-07-26 | 2011-07-26 | Surge current suppression circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120266052U CN202150695U (en) | 2011-07-26 | 2011-07-26 | Surge current suppression circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202150695U true CN202150695U (en) | 2012-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120266052U Expired - Fee Related CN202150695U (en) | 2011-07-26 | 2011-07-26 | Surge current suppression circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202150695U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532118A (en) * | 2012-07-03 | 2014-01-22 | 英飞凌科技奥地利有限公司 | Inrush current limiting circuit |
| CN104578015A (en) * | 2013-10-17 | 2015-04-29 | 上海华虹宏力半导体制造有限公司 | Bit-line circuit capable of inhibiting high-voltage transient currents |
| CN112909907A (en) * | 2021-01-19 | 2021-06-04 | 索尔思光电（成都）有限公司 | Buffer circuit for inhibiting surge current and use method thereof |
-
2011
- 2011-07-26 CN CN201120266052U patent/CN202150695U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532118A (en) * | 2012-07-03 | 2014-01-22 | 英飞凌科技奥地利有限公司 | Inrush current limiting circuit |
| US9728986B2 (en) | 2012-07-03 | 2017-08-08 | Infineon Technologies Austria Ag | Inrush current limiting circuit |
| CN104578015A (en) * | 2013-10-17 | 2015-04-29 | 上海华虹宏力半导体制造有限公司 | Bit-line circuit capable of inhibiting high-voltage transient currents |
| CN112909907A (en) * | 2021-01-19 | 2021-06-04 | 索尔思光电（成都）有限公司 | Buffer circuit for inhibiting surge current and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Input surge current suppression circuit suitable for power factor correction (PFC) converter Effective date of registration: 20150602 Granted publication date: 20120222 Pledgee: Shenzhen high tech investment and financing Company limited by guarantee Pledgor: Shenzhen Yidao Digital Technology Co.,Ltd. Registration number: 2015990000425 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20160726 |