CN205453496U - Chip mounter equipment's power supply circuit - Google Patents

Chip mounter equipment's power supply circuit Download PDF

Info

Publication number
CN205453496U
CN205453496U CN201521122957.XU CN201521122957U CN205453496U CN 205453496 U CN205453496 U CN 205453496U CN 201521122957 U CN201521122957 U CN 201521122957U CN 205453496 U CN205453496 U CN 205453496U
Authority
CN
China
Prior art keywords
voltage
electric capacity
foot
inductance
connects
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.)
Active
Application number
CN201521122957.XU
Other languages
Chinese (zh)
Inventor
余耀国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENZHEN ETON AUTOMATION EQUIPMENT Co Ltd
Original Assignee
SHENZHEN ETON AUTOMATION EQUIPMENT Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHENZHEN ETON AUTOMATION EQUIPMENT Co Ltd filed Critical SHENZHEN ETON AUTOMATION EQUIPMENT Co Ltd
Priority to CN201521122957.XU priority Critical patent/CN205453496U/en
Application granted granted Critical
Publication of CN205453496U publication Critical patent/CN205453496U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The utility model discloses a chip mounter equipment's power supply circuit, including first diode, a filter module, power voltage reduction and stabilization module and the 2nd filter module who connects gradually, outside switching power supply's output voltage is handled by a filter module filtering behind first diode rectification to among the input power voltage reduction and stabilization module, power voltage reduction and stabilization module converts outside switching power supply's output voltage step -down into first voltage earlier, , the steady voltage exports stable first voltage after handling, later step down first voltage and export second voltage after the conversion, carry out filtering through the 2nd filter module and handle output second voltage, messenger chip mounter equipment's available voltage includes outside switching power supply's output voltage, first voltage and second voltage are three kinds, and stabilization of output, each circuit module does not receive switching power supply's bad interference.

Description

A kind of power circuit of chip mounter equipment
Technical field
This utility model relates to power panel designing technique, particularly to the power circuit of a kind of chip mounter equipment.
Background technology
Chip mounter equipment generally uses Switching Power Supply civil power is changed, power panel receives the DC source from Switching Power Supply, then give power voltage step down to meet the requirement of the power supply of each circuit module pair, finally stable voltage source is delivered in each circuit module, it is ensured that each circuit module is not by the bad interference of Switching Power Supply.
At present, after chip mounter equipment uses Switching Power Supply to change civil power, directly Switching Power Supply is accessed each circuit module, at this moment different due to the supply voltage that each circuit module needs, thus need multiple different Switching Power Supply that circuit is powered, cause the complexity of circuit.
Use multiple Switching Power Supply that circuit is powered, cause the complexity of circuit, and because outside Switching Power Supply is big by electric network influencing, when being powered directly to circuit, the operation of circuit can be produced interference.Visible Switching Power Supply is carried out blood pressure lowering and increase mu balanced circuit be necessary.
Utility model content
In place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide the power circuit of chip mounter equipment, can provide multiple different voltage for circuit in the case of using same Switching Power Supply.
In order to achieve the above object, this utility model takes techniques below scheme:
The power circuit of a kind of chip mounter equipment, is connected with external switch power supply, and it includes the first diode, the first filtration module, power voltage step down Voltage stabilizing module and the second filtration module being sequentially connected with;The output voltage of external switch power supply is after the first diode rectification, by the first filtration module Filtering Processing, and in input power lowering and stabilizing blood pressure module;The output voltage blood pressure lowering of external switch power supply is first converted to the first voltage by described power voltage step down Voltage stabilizing module, the first stable voltage is exported after voltage stabilizing processes, export the second voltage after afterwards the first voltage being carried out blood pressure lowering conversion, be filtered processing output the second voltage through the second filtration module.
In the power circuit of described chip mounter equipment, described power voltage step down Voltage stabilizing module includes: the first pressure unit, voltage regulation unit and the second pressure unit, the output voltage of the external switch power supply after described first filtration module Filtering Processing is the first voltage through the first pressure unit blood pressure lowering, enter in the second pressure unit after voltage regulation unit voltage stabilizing, be the second voltage output through the second pressure unit blood pressure lowering.
In the power circuit of described chip mounter equipment, described first filtration module includes the first inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;One end of described first electric capacity connects negative pole and one end of the first inductance, the other end ground connection of described first electric capacity of described first diode;The other end of described first inductance connects one end of described second electric capacity, one end of the 3rd electric capacity, one end of the 4th electric capacity and power voltage step down Voltage stabilizing module, the other end of described second electric capacity, the other end of the 3rd electric capacity and the other end ground connection of the 4th electric capacity.
In the power circuit of described chip mounter equipment, described first pressure unit includes the first reducing transformer, 1st foot of described blood pressure lowering chip connects the other end of the first inductance, and the 2nd foot of described blood pressure lowering chip connects and the 4th foot connects voltage regulation unit, and the 3rd foot of described blood pressure lowering chip connects and the 5th foot ground connection.
In the power circuit of described chip mounter equipment, described first reducing transformer is switch type buck regulator.
In the power circuit of described chip mounter equipment, described voltage regulation unit includes the second diode, the second inductance, the 5th electric capacity, the 6th electric capacity and the 7th electric capacity;The negative pole of described second diode connects the 2nd foot and one end of the second inductance of the first reducing transformer, the plus earth of the second diode, the other end of described second inductance connects the 4th foot, one end of the 5th electric capacity, one end of the 6th electric capacity, one end of the 7th electric capacity and second pressure unit of the first reducing transformer, the other end of the 5th electric capacity, the other end of the 6th electric capacity, the other end ground connection of the 7th electric capacity, the other end of described second inductance is the first voltage output end.
In the power circuit of described chip mounter equipment, described second pressure unit includes the second reducing transformer, the 3rd inductance and the 8th electric capacity, one end of described 3rd inductance connects the 4th foot and the other end of the second inductance of the first reducing transformer, the other end of the 3rd inductance connects the 3rd foot of the second reducing transformer, also by the 8th capacity earth, 1st foot ground connection of the second reducing transformer, the 2nd foot of the second reducing transformer connects the second filtration module.
In the power circuit of described chip mounter equipment, described second reducing transformer is linear voltage stabilization reducing transformer.
In the power circuit of described chip mounter equipment, described second filtration module includes the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, one end of described 9th electric capacity connects the 2nd foot, one end of the tenth electric capacity and one end of the 11st electric capacity of the second reducing transformer, the other end, the other end of the tenth electric capacity and the other end ground connection of the 11st electric capacity of described 9th electric capacity, the other end of described 9th electric capacity is the second voltage output end.
In the power circuit of described chip mounter equipment, described first voltage is 5V, and the second voltage is 3.3V.
Compared to prior art, the power circuit of the chip mounter equipment that this utility model provides includes the first diode, the first filtration module, power voltage step down Voltage stabilizing module and the second filtration module being sequentially connected with;The output voltage of external switch power supply is after the first diode rectification, by the first filtration module Filtering Processing, and in input power lowering and stabilizing blood pressure module;The output voltage blood pressure lowering of external switch power supply is first converted to the first voltage by described power voltage step down Voltage stabilizing module, the first stable voltage is exported after voltage stabilizing processes, the second voltage is exported after afterwards the first voltage being carried out blood pressure lowering conversion, it is filtered processing output the second voltage through the second filtration module, the voltage available making chip mounter equipment includes the output voltage of external switch power supply, the first voltage and the second voltage three kinds, and output voltage stabilization, each circuit module is not by the bad interference of Switching Power Supply.
Accompanying drawing explanation
The structured flowchart of the power circuit of the chip mounter equipment that Fig. 1 provides for this utility model embodiment.
The circuit diagram of the power circuit of the chip mounter equipment that Fig. 2 provides for this utility model embodiment.
Detailed description of the invention
This utility model provides the power circuit of a kind of chip mounter equipment, and this chip mounter equipment can be LED lamp bead chip mounter.For making the purpose of this utility model, technical scheme and effect clearer, clear and definite, this utility model is further described by the embodiment that develops simultaneously referring to the drawings.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Referring to Fig. 1 and Fig. 2, the power circuit of the chip mounter equipment that this utility model provides includes the first diode D1, the first filtration module 10, power voltage step down Voltage stabilizing module 20 and the second filtration module 30 being sequentially connected with;The output voltage of external switch power supply is after the first diode D1 rectification, by the first filtration module 10 Filtering Processing, and in input power lowering and stabilizing blood pressure module 20;The output voltage blood pressure lowering of external switch power supply is first converted to the first voltage by described power voltage step down Voltage stabilizing module 20, the first stable voltage is exported after voltage stabilizing processes, export the second voltage after afterwards the first voltage being carried out blood pressure lowering conversion, be filtered processing output the second voltage through the second filtration module 30.
In the present embodiment, the output voltage of described external switch power supply is 24V, the first voltage is 5V, the second voltage is 3.3V, and described first diode D1 is commutation diode, for flowing to the first filtration module 10 after external switch power supply 24V rectification.First filtration module 10, for the 24V voltage after rectifies is carried out voltage filter, makes voltage more stable.Described power voltage step down Voltage stabilizing module 20 is powered for 24V is carried out a step reduced output voltage 5V voltage, and also 5V voltage carries out blood pressure lowering, and output 3.3V voltage is powered.Described second filtration module 30 is for voltage filter, make the 3.3V that the output of each circuit module is stable, it is achieved thereby that after power voltage step down, stable voltage is delivered to the requirement in each circuit module, it is ensured that each circuit module will not be by the bad interference of Switching Power Supply.
Please continue to refer to Fig. 1 and Fig. 2, described power voltage step down Voltage stabilizing module 20 includes: the first pressure unit 201, voltage regulation unit 202 and the second pressure unit 203, described first pressure unit 201, voltage regulation unit 202 and the second pressure unit 203 are sequentially connected in series, the output voltage of the external switch power supply after described first filtration module 10 Filtering Processing is the first voltage through the first pressure unit 201 blood pressure lowering, enter in the second pressure unit 203 after voltage regulation unit 202 voltage stabilizing, be the second voltage output through the second pressure unit 203 blood pressure lowering.
Described first pressure unit 201 is for being depressurized to 5V by 24V supply voltage switch, then the 5V voltage after blood pressure lowering is flowed to described voltage regulation unit 202, described voltage regulation unit 202 carries out voltage stabilizing process to 5V, then the 5V power voltage supply that the output of each circuit module is stable is given, and described voltage regulation unit 202 also flows to the second pressure unit 203 the 5V after voltage stabilizing, the second pressure unit 203 5V is depressurized to 3.3V.
When being embodied as, described first filtration module 10 includes the first inductance L1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3 and the 4th electric capacity C4;One end of described first electric capacity C1 connects negative pole and one end of the first inductance L1, the other end ground connection of described first electric capacity C1 of described first diode D1;The other end of described first inductance L1 connects one end, one end of the 3rd electric capacity C3, one end of the 4th electric capacity C4 and the power voltage step down Voltage stabilizing module 20 of described second electric capacity C2, the other end, the other end of the 3rd electric capacity C3 and the other end ground connection of the 4th electric capacity C4 of described second electric capacity C2.
Wherein, described first electric capacity C1 and the first inductance L1 constitutes LC filter circuit, acts primarily as filter action, and described second electric capacity C2 plays energy storage effect so that the 24V electric current of output is higher, more stable.3rd electric capacity C3 and the 4th electric capacity C4 plays power supply filter action in described first filtration module 10.Described first filtration module 10 is by 24V and 0V(of the external switch power supply i.e. GND terminal voltage of external switch module) filtering after, provide stable 24V voltage to described first pressure unit 201.
Described first pressure unit 201 includes the first reducing transformer U1, and the 1st foot of described blood pressure lowering chip connects the other end of the first inductance L1, and the 2nd foot of described blood pressure lowering chip connects and the 4th foot connects voltage regulation unit 202, and the 3rd foot of described blood pressure lowering chip connects and the 5th foot ground connection.
Wherein, described first reducing transformer U1 is switch type buck regulator, is mainly used in 24V is depressurized to 5V.The first preferred model of reducing transformer U1 is the switch type buck regulator of LM2576S-5.03A.When use LM2576S-5.03A time, the 1st foot of blood pressure lowering chip is voltage input end, the 2nd foot be voltage output end, the 2nd foot and the 5th foot be earth terminal, the 4th foot of blood pressure lowering chip is feedback end.The most in other embodiments, this reducing transformer can also replace with other electronic devices and components, such as, LM2576-ADJ family chip can be selected to replace, and adapts to the circuit of different voltage requirements for exporting different voltage.
Referring to Fig. 2, described voltage regulation unit 202 includes the second diode D2, the second inductance L2, the 5th electric capacity C5, the 6th electric capacity C6 and the 7th electric capacity C7;The negative pole of described second diode D2 connects the 2nd foot and one end of the second inductance L2 of the first reducing transformer U1, the plus earth of the second diode D2, the other end of described second inductance L2 connects the 4th foot, one end of the 5th electric capacity C5, one end of the 6th electric capacity C6, one end of the 7th electric capacity C7 and second pressure unit 203 of the first reducing transformer U1, the other end of the 5th electric capacity C5, the other end of the 6th electric capacity C6, the other end ground connection of the 7th electric capacity C7, the other end of described second inductance L2 is the first voltage output end.
Described second diode D2 is Schottky rectification diode, and for the voltage-stabilizing protection of 5V power supply, its reversal connection, at DC positive power input, plays unidirectional protection effect;Described second inductance L2 is filtered for the 5V of the 2nd foot of described first reducing transformer U1;Described 5th electric capacity C5 is electrochemical capacitor, for the 5V voltage of output is carried out energy storage so that the 5V electric current of output is higher, more stable;Described 6th electric capacity C6 and the 7th electric capacity C7, for the 5V filtering of the 4th foot to described first reducing transformer U1, the voltage of filtered rear 5V is available for 5V power circuit and uses.
Please continue to refer to Fig. 1 and Fig. 2, described second pressure unit 203 includes the second reducing transformer U2, the 3rd inductance L3 and the 8th electric capacity C8, one end of described 3rd inductance L3 connects the 4th foot and the other end of the second inductance of the first reducing transformer U1, the other end of the 3rd inductance L3 connects the 3rd foot of the second reducing transformer U2, also by the 8th electric capacity C8 ground connection, the 1st foot ground connection of the second reducing transformer U2, the 2nd foot of the second reducing transformer U2 connects the second filtration module 30.
In the present embodiment, described second reducing transformer U2 is linear voltage stabilization reducing transformer, such as GM1117-3.31A high-efficient linear voltage-releasing voltage stabilizer, its 3rd foot be voltage input end, the 2nd foot be voltage output end, the 1st foot is earth terminal.The most in other embodiments, this reducing transformer can also replace with other electronic devices and components, such as, GM1117-ADJ family chip can be selected to replace, and adapts to the circuit of different voltage requirements for exporting different voltage.But, the magnitude of voltage selecting GM1117-ADJ family chip to need to refer to described first reducing transformer U1 carries out type selecting.
Described 3rd inductance L3 is for again filtering the 5V voltage of voltage regulation unit 202 output, it is to avoid the 3.3V circuit of the influence of fluctuations rear class of 5V circuit.Described 8th electric capacity C8 filters again for the 5V voltage of the 3rd inductance L3 output, and 5V voltage is involved in the 3rd foot of the second reducing transformer U2;Described second reducing transformer U2 is depressurized to 3.3V for 5V, eventually passes after described second filtration module 30 carries out voltage filter, and the circuit of output services voltage 3.3V is powered.
Please again continue with Fig. 1 and Fig. 2, described second filtration module 30 includes the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11, one end of described 9th electric capacity C9 connects the 2nd foot, one end of the tenth electric capacity C10 and one end of the 11st electric capacity C11 of the second reducing transformer U2, the other end, the other end of the tenth electric capacity C10 and the other end ground connection of the 11st electric capacity C11 of described 9th electric capacity C9, the other end of described 9th electric capacity C9 is the second voltage output end.
Described 9th electric capacity C9 is electrochemical capacitor, for the 3.3V of output carries out the function of energy storage so that the 3.3V electric current of output is higher, more stable.Described tenth electric capacity C10 and the 11st electric capacity C11, for being filtered 3.3V, makes the 3.3V voltage stabilization of output.
In order to be better understood from this utility model, below in conjunction with Fig. 2, power circuit of the present utility model is described in detail:
The 24V unidirectional current of external switch power supply output is accessed at power circuit, 24V is after the first diode D1 rectification, again after the first electric capacity C1 filtering, filtering is continued by the first inductance L1, enter the second electric capacity C2 and carry out energy storage, the 24V electric current making output is higher, more stable, and then 24V enters the 3rd electric capacity C3 and the 4th electric capacity C4, carries out the last filtering of 24V.
The filtered unidirectional current of 24V enters after in the first reducing transformer U1, blood pressure lowering becomes 5V, stably made it more stable by the second diode D2, input in the 5th electric capacity C5 after the second inductance L2 filtering again and carry out energy storage, the 5V electric current making output is higher, more stable, then 5V enters the 6th electric capacity C6 and the 7th electric capacity C7, carrying out the last filtering of 5V, 5V at this moment can be supplied directly to 5V circuit module and use.
The filtered unidirectional current of 5V is due to for giving 5V circuit module, 5V circuit module also may can produce interference waveform, so 5V enters again the 3rd inductance L3 and the 8th electric capacity C8 and is filtered, after in the second reducing transformer U2, blood pressure lowering becomes 3.3V, enter the 9th electric capacity C9 and carry out energy storage, the 3.3V electric current making output is higher, more stable, then 3.3V entrance the tenth electric capacity C10 and the 11st electric capacity C11 carries out the last filtering of 3.3V, and 3.3V at this moment can be supplied directly to 3.3V circuit module and use.
In sum, this utility model carries out blood pressure lowering and voltage stabilizing by the 24V unidirectional current providing outside Switching Power Supply, realize galvanic blood pressure lowering and voltage stabilizing, achieve the requirement of the power supply of each circuit module pair, finally stable voltage source is delivered in each circuit module, it is ensured that each circuit module is not by the bad interference of Switching Power Supply.It addition, this utility model only uses the conventional electronic component of minority, there is dependable performance, low cost feature.
It is understandable that; for those of ordinary skills; in addition equivalent or change can be conceived according to the technical solution of the utility model and utility model thereof, and all these change or replace and all should belong to the scope of the claims appended by this utility model.

Claims (10)

1. a power circuit for chip mounter equipment, is connected with external switch power supply, it is characterised in that include the first diode, the first filtration module, power voltage step down Voltage stabilizing module and the second filtration module being sequentially connected with;The output voltage of external switch power supply is after the first diode rectification, by the first filtration module Filtering Processing, and in input power lowering and stabilizing blood pressure module;The output voltage blood pressure lowering of external switch power supply is first converted to the first voltage by described power voltage step down Voltage stabilizing module, the first stable voltage is exported after voltage stabilizing processes, export the second voltage after afterwards the first voltage being carried out blood pressure lowering conversion, be filtered processing output the second voltage through the second filtration module.
The power circuit of chip mounter equipment the most according to claim 1, it is characterized in that, described power voltage step down Voltage stabilizing module includes: the first pressure unit, voltage regulation unit and the second pressure unit, the output voltage of the external switch power supply after described first filtration module Filtering Processing is the first voltage through the first pressure unit blood pressure lowering, enter in the second pressure unit after voltage regulation unit voltage stabilizing, be the second voltage output through the second pressure unit blood pressure lowering.
The power circuit of chip mounter equipment the most according to claim 2, it is characterised in that described first filtration module includes the first inductance, the first electric capacity, the second electric capacity, the 3rd electric capacity and the 4th electric capacity;One end of described first electric capacity connects negative pole and one end of the first inductance, the other end ground connection of described first electric capacity of described first diode;The other end of described first inductance connects one end of described second electric capacity, one end of the 3rd electric capacity, one end of the 4th electric capacity and power voltage step down Voltage stabilizing module, the other end of described second electric capacity, the other end of the 3rd electric capacity and the other end ground connection of the 4th electric capacity.
The power circuit of chip mounter equipment the most according to claim 3, it is characterized in that, described first pressure unit includes the first reducing transformer, 1st foot of described blood pressure lowering chip connects the other end of the first inductance, 2nd foot of described blood pressure lowering chip connects and the 4th foot connects voltage regulation unit, and the 3rd foot of described blood pressure lowering chip connects and the 5th foot ground connection.
The power circuit of chip mounter equipment the most according to claim 4, it is characterised in that described first reducing transformer is switch type buck regulator.
The power circuit of chip mounter equipment the most according to claim 4, it is characterised in that described voltage regulation unit includes the second diode, the second inductance, the 5th electric capacity, the 6th electric capacity and the 7th electric capacity;The negative pole of described second diode connects the 2nd foot and one end of the second inductance of the first reducing transformer, the plus earth of the second diode, the other end of described second inductance connects the 4th foot, one end of the 5th electric capacity, one end of the 6th electric capacity, one end of the 7th electric capacity and second pressure unit of the first reducing transformer, the other end of the 5th electric capacity, the other end of the 6th electric capacity, the other end ground connection of the 7th electric capacity, the other end of described second inductance is the first voltage output end.
The power circuit of chip mounter equipment the most according to claim 6, it is characterized in that, described second pressure unit includes the second reducing transformer, the 3rd inductance and the 8th electric capacity, one end of described 3rd inductance connects the 4th foot and the other end of the second inductance of the first reducing transformer, the other end of the 3rd inductance connects the 3rd foot of the second reducing transformer, also by the 8th capacity earth, 1st foot ground connection of the second reducing transformer, the 2nd foot of the second reducing transformer connects the second filtration module.
The power circuit of chip mounter equipment the most according to claim 6, it is characterised in that described second reducing transformer is linear voltage stabilization reducing transformer.
The power circuit of chip mounter equipment the most according to claim 7, it is characterized in that, described second filtration module includes the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, one end of described 9th electric capacity connects the 2nd foot, one end of the tenth electric capacity and one end of the 11st electric capacity of the second reducing transformer, the other end, the other end of the tenth electric capacity and the other end ground connection of the 11st electric capacity of described 9th electric capacity, the other end of described 9th electric capacity is the second voltage output end.
The power circuit of chip mounter equipment the most according to claim 1, it is characterised in that described first voltage is 5V, the second voltage is 3.3V.
CN201521122957.XU 2015-12-31 2015-12-31 Chip mounter equipment's power supply circuit Active CN205453496U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521122957.XU CN205453496U (en) 2015-12-31 2015-12-31 Chip mounter equipment's power supply circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521122957.XU CN205453496U (en) 2015-12-31 2015-12-31 Chip mounter equipment's power supply circuit

Publications (1)

Publication Number Publication Date
CN205453496U true CN205453496U (en) 2016-08-10

Family

ID=56572888

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201521122957.XU Active CN205453496U (en) 2015-12-31 2015-12-31 Chip mounter equipment's power supply circuit

Country Status (1)

Country Link
CN (1) CN205453496U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106487219A (en) * 2016-12-16 2017-03-08 李鹏 A kind of power circuit of central air-conditioning zoning controller
CN107834852A (en) * 2017-11-28 2018-03-23 浙江水利水电学院 A kind of reduction voltage circuit
CN111509949A (en) * 2019-11-25 2020-08-07 深圳市海洋王照明工程有限公司 Voltage reduction circuit and lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106487219A (en) * 2016-12-16 2017-03-08 李鹏 A kind of power circuit of central air-conditioning zoning controller
CN107834852A (en) * 2017-11-28 2018-03-23 浙江水利水电学院 A kind of reduction voltage circuit
CN111509949A (en) * 2019-11-25 2020-08-07 深圳市海洋王照明工程有限公司 Voltage reduction circuit and lamp

Similar Documents

Publication Publication Date Title
CN205453496U (en) Chip mounter equipment's power supply circuit
US20130187625A1 (en) Convergence type power supply device
CN108770117B (en) A kind of integrated LED drive power of compatible electronic transformer
CN204482133U (en) A kind of LED constant pressure and flow drive circuit
CN204119029U (en) A kind of voltage conversion circuit based on boosted switch transducer
CN107148113B (en) A kind of LED drive circuit for T-type fluorescent tube
CN103401428B (en) Switch power supply control chip and switch power supply control system
CN205451749U (en) Backlight drive circuit and television
CN204392101U (en) AC/DC circuit and switching power supply
CN202798505U (en) Bridge rectifier filter circuit
CN203457045U (en) A DC-to-DC converter
CN205793526U (en) LED drive power
CN206100547U (en) LED power of high power factor , low output ripple, high performance -price ratio
CN206099754U (en) Wide input voltage range's auxiliary source circuit
CN204993097U (en) Turn over and swash formula alternately load regulation switching power supply and TV
CN101364771B (en) Single chip controlled power supply apparatus
CN205193651U (en) Instantaneous large current output circuit among low -power circuit
CN204517683U (en) Non-isolated AC/DC regulator circuit and Switching Power Supply
CN207251469U (en) A kind of DC DC conversion circuits for being used for intelligent express delivery cabinet
WO2014086069A1 (en) Conversion module based on train auxiliary electrical system and train auxiliary electrical system
CN215452798U (en) Digital high-voltage module
CN203278658U (en) Switch power supply circuit
CN201499087U (en) Voltage boosting circuit
CN208284211U (en) A kind of backlight constant-current circuit
CN211701876U (en) Power supply circuit with two isolated power supplies and electric energy meter

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model