CN209088834U - Switching power circuit and Switching Power Supply - Google Patents
Switching power circuit and Switching Power Supply Download PDFInfo
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- CN209088834U CN209088834U CN201821684637.7U CN201821684637U CN209088834U CN 209088834 U CN209088834 U CN 209088834U CN 201821684637 U CN201821684637 U CN 201821684637U CN 209088834 U CN209088834 U CN 209088834U
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- direct current
- voltage changing
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Abstract
The utility model relates to a kind of switching power circuit and Switching Power Supplies, preposition processing module accesses Alternating Current Power Supply, alternating current is carried out preposition processing to be converted into DC power transmission to voltage changing module, switch voltage changing module is switched being the direct current output of Switching Power Supply load supplying according to direct current acquisition.When direct current output occurs abnormal, the output adjustment module by acquiring direct current output is adjusted switch voltage changing module, with the direct current output of stable switch voltage changing module, eliminates influence when direct current output occurs abnormal to switching power circuit and load.
Description
Technical field
The utility model relates to switch power technology fields, more particularly to a kind of switching power circuit and Switching Power Supply.
Background technique
Switching Power Supply is the time ratio that control switch pipe turns on and off using modern power electronics technology, remains steady
Determine a kind of power supply of output voltage, currently, Switching Power Supply be widely used with small-sized, light weight and efficient feature it is nearly all
Electronic equipment, be that current electronics and information industry develops rapidly a kind of indispensable power mode.
Traditional Switching Power Supply is when integrated circuit occurs unstable, such as load abnormal power multiplication or the feelings of output short-circuit
Condition, will affect the normal work of Switching Power Supply, and the damage of Switching Power Supply is resulted even in when serious.
Utility model content
Based on this, it is necessary to for drawbacks described above present in traditional Switching Power Supply, provide a kind of switching power circuit
And Switching Power Supply.
A kind of switching power circuit, including preposition processing module, switch voltage changing module and output adjustment module；
Preposition processing module connection switch voltage changing module, and for accessing Alternating Current Power Supply；
Output adjustment module connection switch voltage changing module, and the direct current output of switch voltage changing module is acquired, and be used for basis
The direct current output of direct current output stable switch voltage changing module.
It in one of the embodiments, further include constant voltage and current limiting module；
The direct current output that output adjustment module passes through constant voltage and current limiting module acquisition switch voltage changing module.
It in one of the embodiments, further include current limliting sampling module；
The direct current output that constant voltage and current limiting module passes through current limliting sampling module acquisition switch voltage changing module.
Preposition processing module includes voltage protection module, EMI module and rectifying and wave-filtering mould in one of the embodiments,
Block；
Voltage protection module passes sequentially through EMI module and rectification filtering module connection switch voltage changing module, and for accessing
Alternating Current Power Supply.
Voltage protection module includes surging protection circuit and overvoltage crowbar in one of the embodiments,；
Alternating Current Power Supply is exported through surging protection circuit and overvoltage crowbar to EMI module.
It in one of the embodiments, further include output rectification filter module；
It switchs voltage changing module and direct current output is exported by output rectification filter module.
Output adjustment module includes power management control chip in one of the embodiments,.
Constant voltage and current limiting module includes TSM103 chip in one of the embodiments,.
Current limliting sampling module includes the current-limiting resistance of default precision in one of the embodiments,.
A kind of Switching Power Supply, including Switching Power Supply shell, and the switch electricity in Switching Power Supply enclosure interior space is set
Source circuit；
Switching power circuit includes preposition processing module, switch voltage changing module and output adjustment module；
Preposition processing module connection switch voltage changing module, and for accessing Alternating Current Power Supply；
Output adjustment module connection switch voltage changing module, and the direct current output of switch voltage changing module is acquired, and be used for basis
The direct current output of direct current output stable switch voltage changing module.
Above-mentioned switching power circuit and Switching Power Supply, preposition processing module access Alternating Current Power Supply, carry out to alternating current preposition
Processing is converted into DC power transmission to voltage changing module is switched, and it is that Switching Power Supply load supplies that switch voltage changing module is obtained according to direct current
The direct current output of electricity.When direct current output occurs abnormal, by acquiring the output adjustment module of direct current output to switch transformation
Module is adjusted, and with the direct current output of stable switch voltage changing module, is eliminated when direct current output occurs abnormal to switch power supply
The influence on road and load.
Detailed description of the invention
Fig. 1 is the switching power circuit function structure chart of an embodiment；
Fig. 2 is the preposition processing module function structure chart of an embodiment；
Fig. 3 is the preposition processing module circuit diagram of an embodiment；
Fig. 4 is the switching power circuit function structure chart of another way of example.
Specific embodiment
The purpose of this utility model, technical solution and technical effect in order to better understand, below in conjunction with attached drawing and reality
It applies example and further explaining illustration is carried out to the utility model.It states simultaneously, embodiments described below is only used for explaining this
Utility model is not used to limit the utility model.
The utility model embodiment provides a kind of switching power circuit:
Fig. 1 is the switching power circuit function structure chart of an embodiment, as shown in Figure 1, before switching power circuit includes
Set processing module 100, switch voltage changing module 101 and output adjustment module 102；
Preposition 100 connection switch voltage changing module 101 of processing module, and for accessing Alternating Current Power Supply Vi；
Generally, Switching Power Supply is used to the alternating current of power grid being converted to direct current, for all kinds of DC loads.Wherein,
Preposition processing module 100 carries out preposition processing for accessing Alternating Current Power Supply Vi, to alternating current, converts alternating current to direct current fax
Transport to switch voltage changing module 101.
Fig. 2 is the preposition processing module function structure chart of an embodiment in one of the embodiments, as shown in Fig. 2,
Preposition processing module 100 includes voltage protection module 200, EMI (Electromagnetic Interference electromagnetic interference)
Module 201 and rectification filtering module 202；
Voltage protection module 200 passes sequentially through 202 connection switch voltage changing module of EMI module 201 and rectification filtering module
101, and for accessing Alternating Current Power Supply Vi.
Wherein, voltage protection module 200 handles alternating current, mentions for late-class circuit for accessing Alternating Current Power Supply Vi
Voltage supplied protection.
Voltage protection module 200 includes surging protection circuit and overvoltage crowbar in one of the embodiments,；
Alternating Current Power Supply Vi is exported through surging protection circuit and overvoltage crowbar to EMI module 201.
Wherein, carrying out surge protection is provided for late-class circuit by surging protection circuit, provides over-voltage by overvoltage crowbar
Protection.
Fig. 3 is the preposition processing module circuit diagram of an embodiment, as shown in figure 3, voltage protection module 200 includes temperature-sensitive
Resistance VR1, varistor VR2, resistance R1, resistance R2, capacitor C1 and fuse F1.Wherein, fuse F1 passes through thermistor
The one end VR1 connection Alternating Current Power Supply Vi, and pass through the varistor VR2 connection Alternating Current Power Supply Vi other end.Wherein, capacitor C1 with it is pressure-sensitive
Resistance VR2 is in parallel, and resistance R1 is in parallel with varistor VR2 after connecting with resistance R2.Pass through thermistor VR1, varistor
VR2, resistance R1, resistance R2 and capacitor C1 constitute carrying out surge protection and over-voltage protection.Wherein, fuse F1 is used in Alternating Current Power Supply Vi
Fusing is when abnormal to protect late-class circuit.
Wherein, electromagnetic interference shielding is provided for late-class circuit by EMI module 201.
In one of the embodiments, as shown in figure 3, EMI module 201 includes common mode inductance L1 and capacitor C2.Wherein altogether
One end connection of one end of resistance R1 and resistance R2 that one end connection of a coil of mould inductance L1 is connected in series, another coil is mutually gone here and there
The other end of the resistance R1 and resistance R2 of connection, the other end of a coil connect the other end of another coil by capacitor C2.
Wherein, rectification filtering module 202 is used to Alternating Current Power Supply Vi being converted to direct current, and is filtered place to direct current
Reason.As shown in figure 3, in one embodiment, rectification filtering module 202 includes rectifier bridge B1 and filter capacitor C3.Wherein, rectifier bridge
One end of the first end connection capacitor C2 of B1, second end connect the other end of capacitor C2, and for being grounded, the 4th end is used at third end
It is grounded by filter capacitor C3.It wherein, is alminium electrolytic condenser as preferably embodiment, a filter capacitor C3.
102 connection switch voltage changing module 101 of output adjustment module, and the direct current output Vo of switch voltage changing module 101 is acquired,
And for the direct current output Vo according to direct current output Vo stable switch voltage changing module 101.
Wherein, switch voltage changing module 101 is used to carry out direct current output according to the control of output adjustment module 102.Generally,
Switching voltage changing module 101 includes transformer and metal-oxide-semiconductor, and transformer one end connects preposition processing module 100, the other end
Output adjustment module 102 is connected by metal-oxide-semiconductor.Output adjustment module 102 can adjust transformer by controlling the on-off of metal-oxide-semiconductor
Working method.Wherein, as a preferably embodiment, Transformer Selection POT4020 transformer.
Output adjustment module 102 includes that power management controls chip in one of the embodiments,.
The direct current output that chip controls switch voltage changing module 101 is controlled by power management, with abundant switch voltage changing module
The size and variation of direct current output in 101.Chip selection OB2269 control is controlled as preferably embodiment, a power management
Coremaking piece realizes starting power supply, alternating voltage detection, buffer network and metal-oxide-semiconductor limit by the connection with metal-oxide-semiconductor and transformer
The functions such as stream detection.Meanwhile direct current of the end FB of OB2269 control chip for accessing collected switch voltage changing module 101 is defeated
Corresponding signal out, to control the on-off and adjustment PWM duty cycle of metal-oxide-semiconductor according to the direct current output of switch voltage changing module 101,
With the voltage value of the direct current output of stable switch voltage changing module 101, and limit the current value of direct current output.
Fig. 4 is the switching power circuit function structure chart of another way of example, such as Fig. 4 in one of the embodiments,
Shown, the switching power circuit of another way of example further includes constant voltage and current limiting module 300；
The direct current output that output adjustment module 102 passes through the acquisition switch voltage changing module 101 of constant voltage and current limiting module 300.
Wherein, constant-voltage power supply module 300 is mentioned by the voltage and current of detection direct current output for output adjustment module 102
It is realized for the voltage and current of output so that output adjustment module 102 can adjust the PWM duty cycle of metal-oxide-semiconductor according to the voltage and current
The power of constant voltage and current limiting is protected.It wherein, include TSM103 chip as preferably embodiment, a constant-voltage power supply module 300.
In one of the embodiments, as shown in figure 4, the switching power circuit of another way of example further includes that current limliting takes
Egf block 301；
The direct current output that constant voltage and current limiting module 300 passes through the acquisition switch voltage changing module 101 of current limliting sampling module 301.
Wherein, current limliting sampling module 301 is used for the size of current of 101 direct current output of limit switch voltage changing module, prevents out
Powered-down source circuit overpower work.It include the current limliting of default precision as preferably embodiment, a current limliting sampling module 301
Resistance, direct current output are transmitted to constant voltage and current limiting module 300 by presetting the current-limiting resistance of precision.Wherein, preferably as one
Embodiment, current limliting sampling module 301 select the resistance alloys of 1% precision.
In one of the embodiments, as shown in figure 4, further including output rectification filter module 302；
It switchs voltage changing module 101 and direct current output is exported by output rectification filter module 302.
Wherein, output rectification filter module 302 carries out rectifying and wave-filtering to direct current output.As a preferably embodiment party
Formula, output rectification filter module 302 include diode and capacitor.One end that switch voltage changing module 101 carries out direct current output is used for
The anode, cathode and capacity earth of diode are passed sequentially through, the cathode of diode is for exporting direct current output to load.As one
A preferably embodiment, diode use Schottky diode, and capacitor uses high frequency low-resistance alminium electrolytic condenser.
The utility model embodiment also provides a kind of Switching Power Supply, and Switching Power Supply includes Switching Power Supply shell, and setting
Switching power circuit in Switching Power Supply enclosure interior space；
Switching power circuit includes preposition processing module 100, switch voltage changing module 101 and output adjustment module 102；
Preposition 100 connection switch voltage changing module 101 of processing module, and for accessing Alternating Current Power Supply Vi；
102 connection switch voltage changing module 101 of output adjustment module, and the direct current output of switch voltage changing module 101 is acquired, and
For the direct current output according to direct current output stable switch voltage changing module 101.
It in one of the embodiments, further include constant voltage and current limiting module；
The direct current output that output adjustment module passes through constant voltage and current limiting module acquisition switch voltage changing module.
It in one of the embodiments, further include current limliting sampling module；
The direct current output that constant voltage and current limiting module passes through current limliting sampling module acquisition switch voltage changing module.
Preposition processing module includes voltage protection module, EMI module and rectifying and wave-filtering mould in one of the embodiments,
Block；
Voltage protection module passes sequentially through EMI module and rectification filtering module connection switch voltage changing module, and for accessing
Alternating Current Power Supply Vi.
Voltage protection module includes surging protection circuit and overvoltage crowbar in one of the embodiments,；
Alternating Current Power Supply Vi is exported through surging protection circuit and overvoltage crowbar to EMI module.
It in one of the embodiments, further include output rectification filter module；
It switchs voltage changing module and direct current output is exported by output rectification filter module.
Output adjustment module includes power management control chip in one of the embodiments,.
Constant voltage and current limiting module includes TSM103 chip in one of the embodiments,.
Current limliting sampling module includes the current-limiting resistance of default precision in one of the embodiments,.
Above-mentioned switching power circuit and Switching Power Supply, preposition processing module access Alternating Current Power Supply Vi, before carrying out to alternating current
It sets processing and is converted into DC power transmission to voltage changing module is switched, it is that Switching Power Supply loads that switch voltage changing module is obtained according to direct current
The direct current output of power supply.When direct current output occurs abnormal, the output adjustment module by acquiring direct current output becomes switch
Die block is adjusted, and with the direct current output of stable switch voltage changing module, is eliminated when direct current output occurs abnormal to Switching Power Supply
The influence of circuit and load.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of switching power circuit, which is characterized in that including preposition processing module, switch voltage changing module and output adjustment mould
Block；
The preposition processing module connects the switch voltage changing module, and for accessing Alternating Current Power Supply；
The output adjustment module connects the switch voltage changing module, and acquires the direct current output of the switch voltage changing module, and
For stablizing the direct current output of the switch voltage changing module according to the direct current output.
2. switching power circuit according to claim 1, which is characterized in that further include constant voltage and current limiting module；
The output adjustment module acquires the direct current output of the switch voltage changing module by the constant voltage and current limiting module.
3. switching power circuit according to claim 2, which is characterized in that further include current limliting sampling module；
The constant voltage and current limiting module acquires the direct current output of the switch voltage changing module by the current limliting sampling module.
4. switching power circuit according to claim 1, which is characterized in that the preposition processing module includes voltage protection
Module, EMI module and rectification filtering module；
The voltage protection module passes sequentially through the EMI module and connects the switch voltage changing module with rectification filtering module, and
For accessing Alternating Current Power Supply.
5. switching power circuit according to claim 4, which is characterized in that the voltage protection module includes carrying out surge protection
Circuit and overvoltage crowbar；
The Alternating Current Power Supply is exported through the surging protection circuit and the overvoltage crowbar to the EMI module.
6. switching power circuit according to claim 1, which is characterized in that further include output rectification filter module；
The switch voltage changing module exports the direct current output by the output rectification filter module.
7. according to claim 1 to switching power circuit described in 6 any one, which is characterized in that the output adjustment module
Chip is controlled including power management.
8. switching power circuit according to claim 2, which is characterized in that the constant voltage and current limiting module includes TSM103 core
Piece.
9. switching power circuit according to claim 3, which is characterized in that the current limliting sampling module includes default precision
Current-limiting resistance.
10. a kind of Switching Power Supply, which is characterized in that including Switching Power Supply shell, and be arranged in the Switching Power Supply shell
The switching power circuit in portion space；
The switching power circuit includes preposition processing module, switch voltage changing module and output adjustment module；
The preposition processing module connects the switch voltage changing module, and for accessing Alternating Current Power Supply；
The output adjustment module connects the switch voltage changing module, and acquires the direct current output of the switch voltage changing module, and
For stablizing the direct current output of the switch voltage changing module according to the direct current output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821684637.7U CN209088834U (en) | 2018-10-17 | 2018-10-17 | Switching power circuit and Switching Power Supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821684637.7U CN209088834U (en) | 2018-10-17 | 2018-10-17 | Switching power circuit and Switching Power Supply |
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| CN209088834U true CN209088834U (en) | 2019-07-09 |
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| CN201821684637.7U Active CN209088834U (en) | 2018-10-17 | 2018-10-17 | Switching power circuit and Switching Power Supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120164A (en) * | 2018-10-17 | 2019-01-01 | 李继前 | Switching power circuit and Switching Power Supply |
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2018
- 2018-10-17 CN CN201821684637.7U patent/CN209088834U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109120164A (en) * | 2018-10-17 | 2019-01-01 | 李继前 | Switching power circuit and Switching Power Supply |
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