CN209731070U - Decoupling voltage regulator circuit and power supply - Google Patents
Decoupling voltage regulator circuit and power supply Download PDFInfo
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- CN209731070U CN209731070U CN201920286783.2U CN201920286783U CN209731070U CN 209731070 U CN209731070 U CN 209731070U CN 201920286783 U CN201920286783 U CN 201920286783U CN 209731070 U CN209731070 U CN 209731070U
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Abstract
The utility model discloses a kind of decoupling voltage regulator circuit and power supplys, including voltage stabilizing chip, first decoupling capacitance, second decoupling capacitance, inductance, first resistor, second resistance, 5th resistance, third capacitor and first diode, the voltage stabilizing chip is XL7005A voltage-stablizer, the voltage stabilizing chip is connect with the cathode of one end of inductance and first diode respectively, one end of the first resistor, one end of second resistance, one end of third capacitor, one end of first decoupling capacitance, one end of second decoupling capacitance is connect with the other end of inductance respectively, the other end of the first resistor, the other end of second resistance and the other end of third capacitor are connect with voltage stabilizing chip respectively, 5th resistance is serially connected with the other end of first resistor and with reference between ground, the voltage stabilizing chip, the anode of first diode, first decoupling capacitance The other end of the other end and the second decoupling capacitance with reference is connect, so that circuit is more reliable and more stable, user is allowed to feel more relieved.
Description
Technical field
The utility model relates to circuit fields, in particular to decoupling voltage regulator circuit field.
Background technique
Since capacitor has the function of logical high frequency, resistance low frequency, logical exchange, stopping direct current, capacitor is frequently applied to electricity
Lu Zhong realizes the effect of filtering, so that the waveform that circuit is exported is complete, will be free from impulse signal, drops to a certain extent
The low interference of noise；But people often only consider the requirement of filtering, often have ignored and move back when designing circuit
The requirement of coupling, even if therefore circuit increase filter capacitor, but noise jamming can be led to the problem of.
Utility model content
The purpose of this utility model is that at least solving one of the technical problems existing in the prior art, a kind of stabilization is provided
Reliable decoupling voltage regulator circuit and power supply.
The utility model in a first aspect, provide a kind of decoupling voltage regulator circuit, including voltage stabilizing chip, the first decoupling capacitance,
Second decoupling capacitance, inductance, first resistor, second resistance, the 5th resistance, third capacitor and first diode, the pressure stabilizing core
Piece be XL7005A voltage-stablizer, the power switch output pin of the voltage stabilizing chip respectively with one end of inductance and first diode
Cathode connection, one end of the first resistor, one end of second resistance, one end of third capacitor, the first decoupling capacitance one
End, the second decoupling capacitance one end connect respectively with the other end of inductance, the other end of the first resistor, second resistance it is another
The other end of one end and third capacitor is connect with the feedback pin of voltage stabilizing chip respectively, and the 5th resistance is serially connected with first resistor
The other end and with reference between ground, the enabled pin of the voltage stabilizing chip, the grounding pin of voltage stabilizing chip, first diode are just
The other end of pole, the other end of the first decoupling capacitance and the second decoupling capacitance with reference is connect.
Above-mentioned decoupling voltage regulator circuit at least has the advantages that XL7005A voltage-stablizer is a efficient, high pressure decompression
Type DC-DC converter, fixed 150KHz switching frequency, it is possible to provide highest 0.4A exports current capacity, and low ripple, outstanding is linear
Regulation and load regulation.Fixed oscillator built in XL7005A and frequency compensated circuit, simplify circuit design；The
One decoupling capacitance and the second decoupling capacitance act as the role of decoupling capacitance in decoupling voltage regulator circuit, and the second decoupling capacitance is small
Capacitor can eliminate the parasitic couplings of high frequency；First decoupling capacitance is bulky capacitor, can eliminate the parasitic couplings of low frequency, moreover it is possible to
Enough play filtering, smooth effect；First diode can also prevent electric current from playing a reversed role well, to protect circuit well
Safety and stabilization.
It further include the second diode according to decoupling voltage regulator circuit described in the utility model first aspect, the described 2nd 2
The cathode of pole pipe and the other end of inductance connect, and the anode of second diode is connect with one end of the second decoupling capacitance.The
Two diodes are cascaded with the second decoupling capacitance, playing a reversed role for electric current can be further prevented, so that circuit is safer.
It further include 3rd resistor and the 4th resistance, institute according to decoupling voltage regulator circuit described in the utility model first aspect
It states 3rd resistor and the 4th resistance is serially connected between the other end of inductance and the feedback pin of voltage stabilizing chip.First resistor, second
Resistance, 3rd resistor, the 4th resistance and the 5th resistance form resistance pressure-dividing network, and the feedback pin of voltage stabilizing chip is defeated according to detecting
Voltage is adjusted out.
It further include the 4th capacitor according to decoupling voltage regulator circuit described in the utility model first aspect, the 4th capacitor
It is serially connected with the first power supply and with reference between ground.4th capacitor is electrolytic capacitor, for eliminating noise.
According to decoupling voltage regulator circuit described in the utility model first aspect, first decoupling capacitance is polar capacitor,
The anode of first decoupling capacitance is connect with the other end of inductance, and the cathode of first decoupling capacitance is connect with reference.
First decoupling capacitance is polar capacitor, can not only play the parasitic couplings generated to low frequency signal and eliminate, additionally it is possible into
Row filtering processing.
Second aspect according to the present utility model provides a kind of power supply comprising such as moving back for the utility model first aspect
Coupling voltage regulator circuit.
Above-mentioned power supply at least has the advantages that the decoupling pressure stabilizing electricity of power utilization the utility model first aspect
Road enables power supply to be powered with security and stability, and user is allowed to feel more relieved.
Detailed description of the invention
The utility model is described in further detail with example with reference to the accompanying drawing.
Fig. 1 is a kind of decoupling voltage regulator circuit schematic diagram provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
It should be noted that each feature in the utility model embodiment can be combined with each other if do not conflicted, exist
Within the protection scope of the utility model.
Since capacitor has the function of logical high frequency, resistance low frequency, logical exchange, stopping direct current, capacitor is frequently applied to electricity
Lu Zhong realizes the effect of filtering, so that the waveform that circuit is exported is complete, will be free from impulse signal, drops to a certain extent
The low interference of noise；But people often only consider the requirement of filtering, often have ignored and move back when designing circuit
The requirement of coupling, even if therefore circuit increase filter capacitor, but the case where noise jamming can be generated.
Based on this, the utility model provides a kind of decoupling voltage regulator circuit and power supply, using decoupling capacitance, so that circuit is more
Add reliable and stable, user is allowed to feel more relieved.
With reference to the accompanying drawing, the utility model embodiment is further elaborated.
Referring to Fig.1, the utility model embodiment provides a kind of decoupling voltage regulator circuit, one such embodiment include but
It is not limited to following characteristics:
A kind of decoupling voltage regulator circuit, including voltage stabilizing chip U1, the first decoupling capacitance C1, the second decoupling capacitance C2, inductance L,
First resistor R1, second resistance R2, the 5th resistance R5, third capacitor C3 and first diode D1, the voltage stabilizing chip U1 are
XL7005A voltage-stablizer, the power switch output pin of the voltage stabilizing chip U1 respectively with one end of inductance L and first diode D1
Cathode connection, one end of the first resistor R1, one end of second resistance R2, one end of third capacitor C3, the first decoupling electricity
One end of one end, the second decoupling capacitance C2 for holding C1 is connect with the other end of inductance L respectively, and the first resistor R1's is another
The other end at end, the other end of second resistance R2 and third capacitor C3 is connect with the feedback pin of voltage stabilizing chip U1 respectively, described
5th resistance R5 is serially connected between the other end of first resistor R1 and reference ground, the enabled pin of the voltage stabilizing chip U1, pressure stabilizing
The grounding pin of chip U1, the anode of first diode D1, the other end of the first decoupling capacitance C1 and the second decoupling capacitance C2
The other end with reference is connect.XL7005A voltage-stablizer is a efficient, high pressure buck mode DC-DC converter, fixed 150KHz
Switching frequency, it is possible to provide highest 0.4A exports current capacity, low ripple, outstanding line regulation and load regulation.
Fixed oscillator built in XL7005A and frequency compensated circuit, simplify circuit design；First decoupling capacitance C1 and second is moved back
Coupling capacitor C2 acts as the role of decoupling capacitance in decoupling voltage regulator circuit, and the second decoupling capacitance C2 is small capacitances, can eliminate
The parasitic couplings of high frequency；First decoupling capacitance C1 be bulky capacitor, the parasitic couplings of low frequency can be eliminated, additionally it is possible to play filtering,
Smooth effect；First diode D1 can also prevent electric current from playing a reversed role well, thus protect well circuit safety and
Stablize.
Wherein, voltage stabilizing chip U1 can also be XL7005E1, and XL7005E1 is a kind of high pressure decompression DC/DC switch chip,
It is equally applicable to as the voltage stabilizing chip U1 in the present embodiment.
It wherein, further include the second diode D2, the cathode of the second diode D2 is connect with the other end of inductance L, institute
The anode for stating the second diode D2 is connect with one end of the second decoupling capacitance C2.Second diode D2 and the second decoupling capacitance C2 goes here and there
It is linked togather, playing a reversed role for electric current can be further prevented, so that circuit is safer.
It wherein, further include 3rd resistor R3 and the 4th resistance R4, the 3rd resistor R3 and the 4th resistance R4 are serially connected with electricity
Feel between the other end of L and the feedback pin of voltage stabilizing chip U1.First resistor R1, second resistance R2,3rd resistor R3, the 4th electricity
It hinders R4 and the 5th resistance R5 and forms resistance pressure-dividing network, the feedback pin of voltage stabilizing chip U1 is adjusted according to detection output voltage
It is whole.
It wherein, further include the 4th capacitor C4, the 4th capacitor C4 is serially connected with the first power supply VCC1 and with reference between ground.
VCC1 can be between 5V-80V, and the 4th capacitor C4 is electrolytic capacitor, for eliminating noise.
Wherein, the first decoupling capacitance C1 is polar capacitor, and the first decoupling capacitance C1's is positive another with inductance L
The cathode of one end connection, the first decoupling capacitance C1 is connect with reference.First decoupling capacitance C1 is polar capacitor, not only may be used
It is eliminated with playing the parasitic couplings generated to low frequency signal, additionally it is possible to be filtered.
The utility model embodiment additionally provides a kind of power supply, applies the decoupling voltage regulator circuit in above-described embodiment, energy
Enough power good is allowed reliably to run, user is allowed to feel more relieved.
The above, the only preferred embodiment of the utility model, the utility model are not limited to above-mentioned implementation
Mode, as long as its technical effect for reaching the utility model with identical means, all should belong to the protection scope of the utility model.
Claims (6)
1. a kind of decoupling voltage regulator circuit, it is characterised in that: including voltage stabilizing chip, the first decoupling capacitance, the second decoupling capacitance, electricity
Sense, first resistor, second resistance, the 5th resistance, third capacitor and first diode, the voltage stabilizing chip are XL7005A pressure stabilizing
The power switch output pin of device, the voltage stabilizing chip is connect with the cathode of one end of inductance and first diode respectively, described
One end of first resistor, one end of second resistance, one end of third capacitor, one end of the first decoupling capacitance, the second decoupling capacitance
One end connect respectively with the other end of inductance, the other end of the first resistor, the other end of second resistance and third capacitor
The other end connect respectively with the feedback pin of voltage stabilizing chip, the 5th resistance is serially connected with the other end and the reference of first resistor
Between ground, the enabled pin of the voltage stabilizing chip, the grounding pin of voltage stabilizing chip, the anode of first diode, the first decoupling electricity
The other end of the other end of appearance and the second decoupling capacitance with reference is connect.
2. decoupling voltage regulator circuit according to claim 1, it is characterised in that: it further include the second diode, the described 2nd 2
The cathode of pole pipe and the other end of inductance connect, and the anode of second diode is connect with one end of the second decoupling capacitance.
3. decoupling voltage regulator circuit according to claim 1, it is characterised in that: further include 3rd resistor and the 4th resistance, institute
It states 3rd resistor and the 4th resistance is serially connected between the other end of inductance and the feedback pin of voltage stabilizing chip.
4. decoupling voltage regulator circuit according to claim 1, it is characterised in that: it further include the 4th capacitor, the 4th capacitor
It is serially connected with the first power supply and with reference between ground.
5. decoupling voltage regulator circuit according to claim 1, it is characterised in that: first decoupling capacitance is polar capacitor,
The anode of first decoupling capacitance is connect with the other end of inductance, and the cathode of first decoupling capacitance is connect with reference.
6. a kind of power supply, it is characterised in that: including any decoupling voltage regulator circuit of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920286783.2U CN209731070U (en) | 2019-03-06 | 2019-03-06 | Decoupling voltage regulator circuit and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920286783.2U CN209731070U (en) | 2019-03-06 | 2019-03-06 | Decoupling voltage regulator circuit and power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209731070U true CN209731070U (en) | 2019-12-03 |
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ID=68685505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920286783.2U Active CN209731070U (en) | 2019-03-06 | 2019-03-06 | Decoupling voltage regulator circuit and power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209731070U (en) |
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2019
- 2019-03-06 CN CN201920286783.2U patent/CN209731070U/en active Active
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