CN203339954U - Series-voltage stabilizing circuit for protecting integrated circuit - Google Patents
Series-voltage stabilizing circuit for protecting integrated circuit Download PDFInfo
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- CN203339954U CN203339954U CN2013201400500U CN201320140050U CN203339954U CN 203339954 U CN203339954 U CN 203339954U CN 2013201400500 U CN2013201400500 U CN 2013201400500U CN 201320140050 U CN201320140050 U CN 201320140050U CN 203339954 U CN203339954 U CN 203339954U
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- filter capacitor
- potential drop
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Abstract
The utility model relates to the technical field of triode series voltage-stabilizing circuits, and especially relates to a product which is high in input power voltage, lower in normal working current of an integrated circuit, and higher in requirement of the stability of a working voltage. The technical scheme employed by the utility model is that a series voltage-stabilizing circuit for protecting the integrated circuit is characterized in that the series voltage-stabilizing circuit comprises a triode series voltage-stabilizing circuit which is disposed at a power supply input end, and a high and low frequency filtering and peak and glitch filtering circuit. Through the above technical scheme, the series voltage-stabilizing circuit overcomes problems in the prior art. According to the utility model, a power supply voltage is adjusted from a high voltage to a working voltage which is required by the integrate circuit, and a filter network at an output end can effectively eliminate high and low frequency and peak and glitch signals generated at a power supply end, thereby protecting the working voltage of the integrated circuit from being affected by a complex power application environment. The series voltage-stabilizing circuit provided by the utility model is applicable to the product which is high in input power voltage, lower in normal working current of an integrated circuit, and higher in requirement of stability of a working voltage.
Description
Technical field
The utility model relates to the technical field of triode serial regulating circuit, particularly relates to the high and integrated circuit running current is less and stable operating voltage is had relatively high expectations the product of a kind of input supply voltage.
Background technology
Application scenario at some integrated circuits, often need to drop to light current voltage stabilizing from supply voltage (forceful electric power), be generally first through transformer or capacitance-resistance voltage reduction circuit, to complete the step-down process on the market, and then carry out voltage stabilizing by three terminal regulator or the mode of parallel voltage-stabilizing.The space that so not only circuit is complicated, cost is high but also electric sub-member plate is shared is also larger, compact and there is no a more difficult realization for the product of redundant space for some interior layouts.Less for some oneself power consumption, the integrated circuit that generally only has a few mA operating currents, can realize power supply by the circuit of triode series voltage stabilizing, and not only circuit is simple, and guaranteed the required precision of voltage, guaranteed that the operating voltage of integrated circuit is not affected by complicated power utilization environment.
Fig. 1 is depicted as present triode serial regulating circuit, through resistance and triode step-down, carry out voltage stabilizing by voltage-stabiliser tube again, due to triode not only step-down but also adjust effective, withstand voltage and own power to triode all has higher requirements, at output only and connect large bulk capacitance, there is no other filter networks in addition, can only filtering part low-frequency interference signal.
Summary of the invention
The utility model overcomes the problem that prior art exists, provide a kind of supply voltage is adjusted to the required stable operating voltage of integrated circuit from forceful electric power, and the filter network of output can effectively be eliminated the interference signals such as low-and high-frequency that power end produces, spike burr, guarantee that the operating voltage of integrated circuit is not affected by complicated power utilization environment.Be applicable to the high and novel serial regulating circuit based on Protective IC of the product that the integrated circuit running current is less and stable operating voltage is had relatively high expectations of input supply voltage.
In order to realize above purpose, the utility model adopts following scheme: a kind of serial regulating circuit based on Protective IC, include the current-limiting resistance R1 of power input, voltage is adjusted triode Q2, biasing resistor R45, voltage stabilizing didoe D1 and power output end filter capacitor C1, it is characterized in that: also include the triode bleeder circuit that is arranged on power input and the low-and high-frequency filtering and the spike burr filtering circuit that are arranged on power output end, wherein the triode bleeder circuit is by biasing resistor R23, dividing potential drop triode Q1 forms, low-and high-frequency filtering and spike burr filtering circuit are by filter capacitor C1, filter capacitor C2 and diode D2 form.
Further setting of the present utility model is: dividing potential drop triode Q1 and adjustment triode Q2 are connected in power circuit, supply voltage enters into the collector electrode of dividing potential drop triode Q1 through current-limiting resistance R1, biasing resistor R23 mono-termination power positive pole, the base stage of another termination dividing potential drop triode Q1, the emitter of dividing potential drop triode Q1 is connected with the collector electrode of adjusting triode Q2, the base stage of biasing resistor R45 mono-termination dividing potential drop triode Q1, another termination is adjusted the base stage of triode Q2, the emitter of adjusting triode Q2 connects power output end, voltage stabilizing didoe D1 is attempted by between the base stage and power supply GND of adjusting triode Q1, filter capacitor C1, between output and power supply GND that the low-and high-frequency filtering that filter capacitor C2 and diode D2 form and spike burr filtering circuit are attempted by power supply, described current-limiting resistance R1 is fixed resistance or variable resistor, described biasing resistor R23 is comprised of resistance R 2 and R3, and biasing resistor R45 is comprised of resistance R 4 and R5, and resistance R 2, R3, R4, R5 are fixed resistance or variable resistor, described dividing potential drop triode Q1 and adjustment triode Q2 are the NPN triode, described diode D1 is voltage stabilizing didoe, described diode D2 is the TVS transient voltage suppressor diode, and described filter capacitor C1 has polarity tantalum electric capacity, and described filter capacitor C2 is nonpolarity leaded multilayer ceramic capacitor.
The beneficial effects of the utility model are: circuit is simple and reliable, with low cost, the less difficult heating of power consumption on output voltage stabilization, discrete component.The operating voltage that can guarantee integrated circuit is not affected by complicated power utilization environment.Be applicable to the high and integrated circuit running current is less and stable operating voltage is had relatively high expectations the product of input supply voltage, such as in the circuit such as band time delay adjustable electronic component palette on three phase electric leakage breaker very effectively and practical.
Below in conjunction with accompanying drawing, to this use is novel, be further described.
The accompanying drawing explanation
Fig. 1 is present triode serial regulating circuit structural representation;
The structural representation that Fig. 2 is the utility model embodiment.
Embodiment
Shown in Fig. 2, a kind of serial regulating circuit based on Protective IC, include the current-limiting resistance R1 of power input, voltage is adjusted triode Q2, biasing resistor R45, voltage stabilizing didoe D1 and power output end filter capacitor C1, in the present embodiment, also include the triode bleeder circuit that is arranged on power input and the low-and high-frequency filtering and the spike burr filtering circuit that are arranged on power output end, wherein the triode bleeder circuit is by biasing resistor R23, dividing potential drop triode Q1 forms, low-and high-frequency filtering and spike burr filtering circuit are by filter capacitor C1, filter capacitor C2 and diode D2 form.
In the utility model embodiment, dividing potential drop triode Q1 and adjustment triode Q2 are connected in power circuit, supply voltage enters into the collector electrode of dividing potential drop triode Q1 through current-limiting resistance R1, biasing resistor R23 mono-termination power positive pole, the base stage of another termination dividing potential drop triode Q1, the emitter of dividing potential drop triode Q1 is connected with the collector electrode of adjusting triode Q2, the base stage of biasing resistor R45 mono-termination dividing potential drop triode Q1, another termination is adjusted the base stage of triode Q2, the emitter of adjusting triode Q2 connects power output end, voltage stabilizing didoe D1 is attempted by between the base stage and power supply GND of adjusting triode Q1, filter capacitor C1, between output and power supply GND that the low-and high-frequency filtering that filter capacitor C2 and diode D2 form and spike burr filtering circuit are attempted by power supply, described current-limiting resistance R1 is fixed resistance or variable resistor, described biasing resistor R23 is comprised of resistance R 2 and R3, and biasing resistor R45 is comprised of resistance R 4 and R5, and resistance R 2, R3, R4, R5 are fixed resistance or variable resistor, described dividing potential drop triode Q1 and adjustment triode Q2 are the NPN triode, described diode D1 is voltage stabilizing didoe, described diode D2 is the TVS transient voltage suppressor diode, and described filter capacitor C1 has polarity tantalum electric capacity, and described filter capacitor C2 is nonpolarity leaded multilayer ceramic capacitor.
Wherein resistance R 1 is metering function, can select resistance and power according to operating current and the voltage of load (integrated circuit).Resistance R 2, R3, R4, R5 provide base bias voltage to triode, and its resistance and power are selected according to the base stage operating current of triode, and resistance should be selected larger as far as possible.Diode D1 plays pressure stabilization function, and its voltage stabilizing value specification is fixed.Diode D2 plays the transient voltage inhibitory action, and its breakdown voltage value specification is fixed.Filter capacitor C1 has polarity tantalum electric capacity, and nonpolarity leaded multilayer ceramic capacitor C2 composition low-and high-frequency filter network, and the capacity of electric capacity and withstand voltage need calculate.Because capacitance and you want square being inversely proportional to of rejection frequency, thus the capacitance of filter capacitor C1, filter capacitor C2 require to differ two more than the order of magnitude, the larger filtering frequency range with acquisition.
Claims (7)
1. the serial regulating circuit based on Protective IC, include the current-limiting resistance R1 of power input, voltage is adjusted triode Q2, biasing resistor R45, voltage stabilizing didoe D1 and power output end filter capacitor C1, it is characterized in that: also include the triode bleeder circuit that is arranged on power input and the low-and high-frequency filtering and the spike burr filtering circuit that are arranged on power output end, wherein the triode bleeder circuit is by biasing resistor R23, dividing potential drop triode Q1 forms, low-and high-frequency filtering and spike burr filtering circuit are by filter capacitor C1, filter capacitor C2 and diode D2 form.
2. a kind of serial regulating circuit based on Protective IC according to claim 1, it is characterized in that: dividing potential drop triode Q1 and adjustment triode Q2 are connected in power circuit, supply voltage enters into the collector electrode of dividing potential drop triode Q1 through current-limiting resistance R1, biasing resistor R23 mono-termination power positive pole, the base stage of another termination dividing potential drop triode Q1, the emitter of dividing potential drop triode Q1 is connected with the collector electrode of adjusting triode Q2, the base stage of biasing resistor R45 mono-termination dividing potential drop triode Q1, another termination is adjusted the base stage of triode Q2, the emitter of adjusting triode Q2 connects power output end, voltage stabilizing didoe D1 is attempted by between the base stage and power supply GND of adjusting triode Q1, filter capacitor C1, between output and power supply GND that the low-and high-frequency filtering that filter capacitor C2 and diode D2 form and spike burr filtering circuit are attempted by power supply.
3. a kind of serial regulating circuit based on Protective IC according to claim 1 and 2, it is characterized in that: described current-limiting resistance R1 is fixed resistance or variable resistor.
4. a kind of serial regulating circuit based on Protective IC according to claim 1 and 2; it is characterized in that: described biasing resistor R23 is comprised of resistance R 2 and R3; biasing resistor R45 is comprised of resistance R 4 and R5, and resistance R 2, R3, R4, R5 are fixed resistance or variable resistor.
5. a kind of serial regulating circuit based on Protective IC according to claim 1 and 2; it is characterized in that: described dividing potential drop triode Q1 and adjustment triode Q2 are the NPN triode; described diode D1 is voltage stabilizing didoe; described diode D2 is the TVS transient voltage suppressor diode; described filter capacitor C1 has polarity tantalum electric capacity, and described filter capacitor C2 is nonpolarity leaded multilayer ceramic capacitor.
6. a kind of serial regulating circuit based on Protective IC according to claim 3; it is characterized in that: described dividing potential drop triode Q1 and adjustment triode Q2 are the NPN triode; described diode D1 is voltage stabilizing didoe; described diode D2 is the TVS transient voltage suppressor diode; described filter capacitor C1 has polarity tantalum electric capacity, and described filter capacitor C2 is nonpolarity leaded multilayer ceramic capacitor.
7. a kind of serial regulating circuit based on Protective IC according to claim 4; it is characterized in that: described dividing potential drop triode Q1 and adjustment triode Q2 are the NPN triode; described diode D1 is voltage stabilizing didoe; described diode D2 is the TVS transient voltage suppressor diode; described filter capacitor C1 has polarity tantalum electric capacity, and described filter capacitor C2 is nonpolarity leaded multilayer ceramic capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201400500U CN203339954U (en) | 2013-03-25 | 2013-03-25 | Series-voltage stabilizing circuit for protecting integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201400500U CN203339954U (en) | 2013-03-25 | 2013-03-25 | Series-voltage stabilizing circuit for protecting integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203339954U true CN203339954U (en) | 2013-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201400500U Expired - Lifetime CN203339954U (en) | 2013-03-25 | 2013-03-25 | Series-voltage stabilizing circuit for protecting integrated circuit |
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| Country | Link |
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| CN (1) | CN203339954U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213286A1 (en) * | 2020-04-24 | 2021-10-28 | 深圳市韶音科技有限公司 | Charging control circuit and acoustic output device |
| CN116995906A (en) * | 2023-07-11 | 2023-11-03 | 江苏展芯半导体技术有限公司 | Peak voltage suppression circuit |
-
2013
- 2013-03-25 CN CN2013201400500U patent/CN203339954U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021213286A1 (en) * | 2020-04-24 | 2021-10-28 | 深圳市韶音科技有限公司 | Charging control circuit and acoustic output device |
| CN116995906A (en) * | 2023-07-11 | 2023-11-03 | 江苏展芯半导体技术有限公司 | Peak voltage suppression circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |