CN209088832U - A kind of Switching Power Supply constant-current control circuit - Google Patents
A kind of Switching Power Supply constant-current control circuit Download PDFInfo
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- CN209088832U CN209088832U CN201822101223.3U CN201822101223U CN209088832U CN 209088832 U CN209088832 U CN 209088832U CN 201822101223 U CN201822101223 U CN 201822101223U CN 209088832 U CN209088832 U CN 209088832U
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Abstract
The utility model relates to a kind of Switching Power Supply constant-current control circuits, including rectifier bridge D, single-chip microcontroller U, energy storage capacitor C, constant pressure module, 1 foot and 3 feet of rectifier bridge D is connect with the firewire of external power and zero curve respectively, one end of energy storage capacitor C is connect with one end of 2 feet of rectifier bridge D and constant pressure module, the other end of energy storage capacitor C is connect with one end of single-chip microcontroller U, the other end of single-chip microcontroller U is connect with the other end of 4 feet of rectifier bridge and constant pressure module respectively, the other end of single-chip microcontroller U is further connected with solid-state memory S, by the way that energy storage capacitor C is arranged, single-chip microcontroller U and solid-state memory S, this Switching Power Supply can have a variety of current constant control effects, structure is simple, application easy to spread.
Description
Technical field
The utility model relates to a kind of Switching Power Supply constant-current control circuits.
Background technique
With the development of power electronics technology, Switching Power Supply is increasingly widely used, opening with current constant control effect
Powered-down source can provide stable use environment for the more sensitive electrical equipment of some pairs of power goods, for example, LED light equipment
It generally requires and is used cooperatively with constant-current control circuit, still, the control of the general Switching Power Supply with different current constant control effects
Circuit processed is more complicated, is unfavorable for promoting and applying.
Therefore, it is necessary to be further improved.
Utility model content
The purpose of the utility model is to overcome above-mentioned the shortcomings of the prior art, and provide a kind of Switching Power Supply constant current
Control circuit, it is intended to solve one of above-mentioned technical problem in the prior art at least to a certain extent.
Purpose of the utility model is realized as follows:
A kind of Switching Power Supply constant-current control circuit, including rectifier bridge D, single-chip microcontroller U, energy storage capacitor C, constant pressure module, rectification
1 foot and 3 feet of bridge D is connect with the firewire of external power and zero curve respectively, one end of energy storage capacitor C and 2 feet of rectifier bridge D and
One end of constant pressure module connects, and the other end of energy storage capacitor C is connect with one end of single-chip microcontroller U, the other end of single-chip microcontroller U respectively with
4 feet of rectifier bridge and the other end connection of constant pressure module, single-chip microcontroller U are further connected with solid-state memory S.
The constant pressure module includes resistance R1, resistance R2, resistance R3, and zener diode ZD1, close source of stable pressure TL, field is imitated
It should pipe Q, capacitor C1, diode D1, current regulator diode D2 and inductance L；
One end of resistance R1, the cathode of diode D1, one end of resistance R2, two pole of one end and constant current of energy storage capacitor C
The cathode of pipe and 2 feet of rectifier bridge connect；
The cathode of the other end of resistance R1 and zener diode ZD1, one end of capacitor C1, the grid of field-effect tube Q and
The cathode connection of close source of stable pressure TL；
The anode of zener diode ZD1 and the other end of capacitor C1 are grounded after connecting with the source electrode of field-effect tube Q；
The anode of diode D1 and one end of inductance L are connect with the drain electrode of field-effect tube Q respectively；
The anode with close source of stable pressure TL, one end of resistance R3 and power output end connect the other end of inductance L respectively；
The other end of resistance R2 and the other end of resistance R3 are connect with the reference pole of close source of stable pressure TL respectively；
The anode of current regulator diode D2 is connect with power output end.
Between 1 foot and 3 feet of the rectifier bridge D and it is connected to varistor VRR.
The varistor VRR is removable installed on resistance frame, the both ends of resistance frame respectively with 1 foot of rectifier bridge D
It is connected with 3 feet.
The beneficial effects of the utility model are:
By the way that energy storage capacitor C, single-chip microcontroller U and solid-state memory S is arranged, this Switching Power Supply can have a variety of constant current controls
Effect processed, structure is simple, application easy to spread.
The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this
The practice of type is recognized.
Detailed description of the invention
Fig. 1 is the electrical block diagram of the utility model embodiment.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and embodiments.
Referring to Fig. 1, this Switching Power Supply constant-current control circuit, including rectifier bridge D, single-chip microcontroller U, energy storage capacitor C, constant pressure mould
Block, 1 foot and 3 feet of rectifier bridge D are connect with the firewire of external power and zero curve respectively, and one end of energy storage capacitor C is with rectifier bridge D's
The connection of one end of 2 feet and constant pressure module, the other end of energy storage capacitor C are connect with one end of single-chip microcontroller U, and single-chip microcontroller U's is another
End is connect with the other end of 4 feet of rectifier bridge and constant pressure module respectively, and single-chip microcontroller U is further connected with solid-state memory S；
The working principle of the utility model is such that energy storage capacitor C in outer power cut-off or because adjusting current constant control
After voltage fluctuation caused by effect, it can maintain to power to single-chip microcontroller U with the short time, at this point, single-chip microcontroller U can sample reception dispatch from foreign news agency
The input voltage in source changes, and this variation is stored in solid-state memory S, when adjusting current constant control effect next time,
Single-chip microcontroller U reads solid-state memory S to issue corresponding control signal to constant pressure module, reaches adjustment current constant control effect；
By the way that energy storage capacitor C, single-chip microcontroller U and solid-state memory S is arranged, this Switching Power Supply can have a variety of constant current controls
Effect processed, structure is simple, application easy to spread.
Further, constant pressure module includes resistance R1, resistance R2, resistance R3, zener diode ZD1, close source of stable pressure TL,
Field-effect tube Q, capacitor C1, diode D1, current regulator diode D2 and inductance L；
One end of resistance R1, the cathode of diode D1, one end of resistance R2, two pole of one end and constant current of energy storage capacitor C
The cathode of pipe and 2 feet of rectifier bridge connect；
The cathode of the other end of resistance R1 and zener diode ZD1, one end of capacitor C1, the grid of field-effect tube Q and
The cathode connection of close source of stable pressure TL；
The anode of zener diode ZD1 and the other end of capacitor C1 are grounded after connecting with the source electrode of field-effect tube Q；
The anode of diode D1 and one end of inductance L are connect with the drain electrode of field-effect tube Q respectively；
The anode with close source of stable pressure TL, one end of resistance R3 and power output end connect the other end of inductance L respectively；
The other end of resistance R2 and the other end of resistance R3 are connect with the reference pole of close source of stable pressure TL respectively；
The anode of current regulator diode D2 is connect with power output end.
Further, between 1 foot and 3 feet of rectifier bridge D and it is connected to varistor VRR, anti-lightning strike damage can be played
Effect increases the safety of product.
Further, varistor VRR is removable installed on resistance frame (being not drawn into figure), the both ends point of resistance frame
It is not connect with 1 foot of rectifier bridge D and 3 feet, user is facilitated to replace varistor VRR.
Above-described embodiment is the preferred embodiment of the utility model, and the utility model can also have other embodiments.Ability
The technical staff in domain can also make equivalent deformation or replacement without departing from the spirit of the present invention, these equivalent changes
Type or replacement are all contained in range set by the claim of this application.
Claims (4)
1. a kind of Switching Power Supply constant-current control circuit, including rectifier bridge D, single-chip microcontroller U, energy storage capacitor C, constant pressure module, feature
It is, 1 foot and 3 feet of the rectifier bridge D is connect with the firewire of external power and zero curve respectively, one end of the energy storage capacitor C
It is connect with one end of 2 feet of rectifier bridge D and constant pressure module, the other end of energy storage capacitor C is connect with one end of single-chip microcontroller U, single
The other end of piece machine U is connect with the other end of 4 feet of rectifier bridge and constant pressure module respectively, and single-chip microcontroller U is further connected with solid-state storage
Device S.
2. Switching Power Supply constant-current control circuit according to claim 1, it is characterised in that: the constant pressure module includes resistance
R1, resistance R2, resistance R3, zener diode ZD1, close source of stable pressure TL, field-effect tube Q, capacitor C1, diode D1, constant current two
Pole pipe D2 and inductance L；
One end of the resistance R1, the cathode of diode D1, one end of resistance R2, two pole of one end and constant current of energy storage capacitor C
The cathode of pipe and 2 feet of rectifier bridge connect；
The cathode of the other end of resistance R1 and zener diode ZD1, one end of capacitor C1, the grid of field-effect tube Q and close
The cathode of source of stable pressure TL connects；
The anode of zener diode ZD1 and the other end of capacitor C1 are grounded after connecting with the source electrode of field-effect tube Q；
The anode of diode D1 and one end of inductance L are connect with the drain electrode of field-effect tube Q respectively；
The anode with close source of stable pressure TL, one end of resistance R3 and power output end connect the other end of inductance L respectively；
The other end of resistance R2 and the other end of resistance R3 are connect with the reference pole of close source of stable pressure TL respectively；
The anode of current regulator diode D2 is connect with power output end.
3. Switching Power Supply constant-current control circuit according to claim 1, it is characterised in that: 1 foot and 3 feet of the rectifier bridge D
Between and be connected to varistor VRR.
4. Switching Power Supply constant-current control circuit according to claim 3, it is characterised in that: the varistor VRR is detachable
Ground is set on resistance frame, and the both ends of the resistance frame are connect with 1 foot of rectifier bridge D and 3 feet respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822101223.3U CN209088832U (en) | 2018-12-13 | 2018-12-13 | A kind of Switching Power Supply constant-current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822101223.3U CN209088832U (en) | 2018-12-13 | 2018-12-13 | A kind of Switching Power Supply constant-current control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088832U true CN209088832U (en) | 2019-07-09 |
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ID=67127028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822101223.3U Active CN209088832U (en) | 2018-12-13 | 2018-12-13 | A kind of Switching Power Supply constant-current control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209088832U (en) |
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2018
- 2018-12-13 CN CN201822101223.3U patent/CN209088832U/en active Active
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