CN207782660U - Inexpensive reduction voltage circuit - Google Patents
Inexpensive reduction voltage circuit Download PDFInfo
- Publication number
- CN207782660U CN207782660U CN201721851993.9U CN201721851993U CN207782660U CN 207782660 U CN207782660 U CN 207782660U CN 201721851993 U CN201721851993 U CN 201721851993U CN 207782660 U CN207782660 U CN 207782660U
- Authority
- CN
- China
- Prior art keywords
- filter capacitor
- dropping resistor
- terminal
- reduction voltage
- voltage circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a kind of inexpensive reduction voltage circuit, it solves the technical problems such as the prior art is of high cost.This low cost reduction voltage circuit, including dropping resistor, dropping resistor one end are connected with Input voltage terminal, and the dropping resistor other end is connected with zener diode one end and output voltage terminal respectively, and the zener diode other end is connected with ground terminal；Filter circuit is equipped between Input voltage terminal and ground terminal and/or between output voltage terminal and ground terminal；Filter circuit includes the first filter capacitor and the second filter capacitor parallel with one another.Advantage is：The main part of reduction voltage circuit is made of dropping resistor and zener diode, the parameter for changing dropping resistor and zener diode is only needed to can be adjusted the voltage value of output voltage terminal, and the reduction voltage circuit built with respect to chips such as such as 78LXX, LDO, reduce cost, simultaneously under the extreme cases such as load short circuits, also it is less likely to be damaged.
Description
Technical field
The utility model belongs to reduction voltage circuit technical field, more particularly, to a kind of inexpensive reduction voltage circuit.
Background technology
It, especially will be compared with currently, a large amount of electronic product needs power supply being converted to the direct current of suitable voltage to power
The direct current of high voltage is converted to the direct current of low voltage, so, market needs a large amount of reduction voltage circuit.Current decompression electricity
Road is mainly built by chips such as such as 78LXX, LDO, and cost is higher.
Invention content
The purpose of this utility model be in view of the above-mentioned problems, provide a kind of reasonable design, simple in structure, it is at low cost it is low at
This reduction voltage circuit.
In order to achieve the above objectives, the utility model uses following technical proposal：This low cost reduction voltage circuit, including decompression
Resistance, described dropping resistor one end are connected with Input voltage terminal, and the dropping resistor other end respectively with zener diode one
End is connected with output voltage terminal, and the zener diode other end is connected with ground terminal；Input voltage terminal and ground terminal it
Between and/or between output voltage terminal and ground terminal be equipped with filter circuit.
In above-mentioned inexpensive reduction voltage circuit, the filter circuit includes the first filter capacitor and parallel with one another
Two filter capacitors.
In above-mentioned inexpensive reduction voltage circuit, first filter capacitor is polarized capacitance, the described second filter
Wave capacitance is polarity free capacitor.
In above-mentioned inexpensive reduction voltage circuit, the capacitance of first filter capacitor in 1uF between 20uF, institute
The capacitance for the second filter capacitor stated is in 0.01uF between 2uF.
In above-mentioned inexpensive reduction voltage circuit, first filter capacitor is electrolytic capacitor, the described second filtering
Capacitance is ceramic condenser.
Compared with prior art, the advantages of this low cost reduction voltage circuit, is：By dropping resistor and zener diode structure
At the main part of reduction voltage circuit, it is only necessary to which the parameter for changing dropping resistor and zener diode can be adjusted output voltage terminal
Voltage value, and the reduction voltage circuit built with respect to chips such as such as 78LXX, LDO reduce cost, while negative
It carries under the extreme cases such as short circuit, is also less likely to be damaged.
Description of the drawings
Fig. 1 provides the structural schematic diagram of the utility model.
In figure, dropping resistor 1, Input voltage terminal 2, zener diode 3, output voltage terminal 4, ground terminal 5, the first filtered electrical
Hold the 6, second filter capacitor 7.
Specific implementation mode
The technical issues of in order to keep the utility model solved, technical solution and advantageous effect are more clearly understood, below
The utility model is described further with reference to the drawings and specific embodiments, but the utility model is not limited to described implementation
Example, on the contrary, the utility model includes whole modifications, modification and the equivalent fallen within the scope of the appended claims.
As shown in Figure 1, this low cost reduction voltage circuit, including dropping resistor 1,1 one end of dropping resistor and 2 phase of Input voltage terminal
Even, and 1 other end of dropping resistor is connected with 3 one end of zener diode and output voltage terminal 4 respectively, and zener diode 3 is another
End is connected with ground terminal 5；It is equipped between Input voltage terminal 2 and ground terminal 5 and/or between output voltage terminal 4 and ground terminal 5
Filter circuit.The model of zener diode 3 can be 1N41 ××s series, 1N46 ××s series, 1N47 ××s series, 1N52 ×
× series, 1N59 ××s are serial, 1N6 ××s are serial, 1N700 series, 1N900 series, MTZ series, MTZJ is serial, RLZ is serial,
RLZJ series, HZ series, RD series, 05Z series, PTZ series, DTZ series etc..The voltage of Input voltage terminal 2 can be 5-
60V。
First resistor can be connected between dropping resistor 1 and Input voltage terminal 2, in dropping resistor 1 and output voltage
It can be connected with second resistance between end 4, first resistor and second resistance are not shown in figures.
Filter circuit includes the first filter capacitor 6 and the second filter capacitor 7 parallel with one another；First filter capacitor 6 with connect
It is connected with 3rd resistor between ground terminal 5, the 4th resistance, 3rd resistor and are connected between the second filter capacitor 7 and ground terminal 5
Four resistance are not shown in the accompanying drawings；Preferably, the first filter capacitor 6 is polarized capacitance, and the second filter capacitor 7 is nonpolarity
Capacitance, the capacitance of the first filter capacitor 6 is in 1uF between 20uF, and the capacitance of the second filter capacitor 7 is in 0.01uF to 2uF
Between；More preferred scheme, the first filter capacitor 6 are electrolytic capacitor, and the second filter capacitor 7 is ceramic condenser.Because of electrolysis
The parasitic inductance of capacitance is larger, and elimination high frequency ripple ability is poor, and polarity free capacitor parasitic inductance is smaller, filters out high frequency ripple
Ability is preferable；But if capacity is selected according to the requirement of low frequency, polarity free capacitor volume is too big, and cost is also high, and electrolytic capacitor
Small, same capacity price is relatively inexpensive, therefore uses polarity free capacitor and electrolytic capacitor in parallel.
This low cost reduction voltage circuit is made of the main part of reduction voltage circuit dropping resistor 1 and zener diode 3, it is only necessary to
The parameter of change dropping resistor 1 and zener diode 3 can be adjusted the voltage value of output voltage terminal 4, and with respect to such as
The reduction voltage circuit that the chips such as 78LXX are built reduces cost, while under the extreme cases such as load short circuits, being also not easy
Damage.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although dropping resistor 1 is used more herein, Input voltage terminal 2, zener diode 3, output voltage terminal 4, connects
The terms such as ground terminal 5, the first filter capacitor 6, the second filter capacitor 7, but it does not preclude the possibility of using other terms.Use this
A little terms are used for the purpose of more easily describing and explaining the essence of the utility model；It is additional to be construed as any type
Limitation is all contrary to the spirit of the present invention.
Claims (4)
1. it is a kind of low cost reduction voltage circuit, which is characterized in that including dropping resistor (1), the dropping resistor (1) one end with it is defeated
Enter voltage end (2) be connected, and dropping resistor (1) other end respectively with zener diode (3) one end and output voltage terminal (4) phase
Even, the zener diode (3) other end is connected with ground terminal (5)；Between Input voltage terminal (2) and ground terminal (5) and/
Or filter circuit is equipped between output voltage terminal (4) and ground terminal (5)；The filter circuit includes parallel with one another first
Filter capacitor (6) and the second filter capacitor (7).
2. low cost reduction voltage circuit according to claim 1, which is characterized in that first filter capacitor (6) is to have
Polar capacitor, second filter capacitor (7) are polarity free capacitor.
3. low cost reduction voltage circuit according to claim 2, which is characterized in that the electricity of first filter capacitor (6)
Capacitance is in 1uF between 20uF, and the capacitance of second filter capacitor (7) is in 0.01uF between 2uF.
4. low cost reduction voltage circuit according to claim 2, which is characterized in that first filter capacitor (6) is electricity
Capacitance is solved, second filter capacitor (7) is ceramic condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721851993.9U CN207782660U (en) | 2017-12-26 | 2017-12-26 | Inexpensive reduction voltage circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721851993.9U CN207782660U (en) | 2017-12-26 | 2017-12-26 | Inexpensive reduction voltage circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207782660U true CN207782660U (en) | 2018-08-28 |
Family
ID=63224552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721851993.9U Expired - Fee Related CN207782660U (en) | 2017-12-26 | 2017-12-26 | Inexpensive reduction voltage circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207782660U (en) |
-
2017
- 2017-12-26 CN CN201721851993.9U patent/CN207782660U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180828 Termination date: 20201226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |