CN206099804U - Switch steady voltage source system based on UC3843 - Google Patents
Switch steady voltage source system based on UC3843 Download PDFInfo
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- CN206099804U CN206099804U CN201621133120.XU CN201621133120U CN206099804U CN 206099804 U CN206099804 U CN 206099804U CN 201621133120 U CN201621133120 U CN 201621133120U CN 206099804 U CN206099804 U CN 206099804U
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Abstract
The utility model discloses an use UC3843 as BOOST owner's topology of PWM controller high stability switch steady voltage source as the core, specifically be a switch steady voltage source system based on UC3843. Including 220V voltage reducing module, full -bridge rectifier module, based on UC3843's BOOST boost module, voltage current sample module, single -chip computer control module, keyboard module, display module, overcurrent protection module and auxiliary power supply module. This system is an output voltage 25V is 2A to the accurate step -by -step adjustable of 36V, maximum output electric current high stability switch steady voltage source. There is following advantage: (1 )The high accuracy, step -by -step adjustable, stability is good, the system load regulation is less than 0.1%, voltage regulation and is less than 0.01% (2) efficiently, can reach the simple compactness of (3) the whole structure 90% or more, has current -voltage and shows and the overload protection function, man -machine interface cordially.
Description
Technical field
This utility model is related to a kind of switch voltage-stabilizing source, is primarily referred to as what the BOOST with UC3843 as control core boosted
High stability switch voltage-stabilizing source, i.e., a kind of switch voltage-stabilizing origin system based on UC3843.
Background technology
Power supply is the important component part of various electronic equipments, it just like the heart of human body, be all electric kind equipments just
Often operation provides power.With various electronic equipments, the fast development of electrical equipment, to high efficiency, the quality power of stable performance
There is great demand.Therefore design and Implement a kind of efficiency high, stable performance, output voltage is adjustable, carrying load ability by force simultaneously
There is important realistic meaning in switch voltage-stabilizing source with certain defencive function.
Utility model content
The purpose of this utility model be meet reality in actual demand, while overcome in existing power supply some not
Foot part, there is provided a kind of efficiency high, stable performance, output voltage is adjustable, carrying load ability is by force and with certain defencive function
Switch voltage-stabilizing source.
This utility model adopts the following technical scheme that realization：
A kind of switch voltage-stabilizing origin system based on UC3843, including 220V voltage reduction modules, full-bridge rectifier filter module, be based on
The BOOST boost modules of UC3843, voltage x current sampling module, single chip control module, Keysheet module；220V voltage reduction modules,
Full-bridge rectifier filter module, it is sequentially connected based on the BOOST boost modules of UC3843, voltage x current sampling module, is based on
The BOOST boost modules of UC3843, voltage x current sampling module are connected respectively with single chip control module, single chip control module
It is connected with Keysheet module.
Also include the display module being connected with single chip control module.
Also include overcurrent protection module and auxiliary power module；Overcurrent protection module be located at full-bridge rectifier filter module,
Based between the BOOST boost modules of UC3843, auxiliary power module is connected with full-bridge rectifier filter module.
The BOOST boost modules based on UC3843 include that current mode PWM control chip UC3843 and digital-to-analogue turn
Change chip DAC8552.
The voltage x current sampling module includes sampling A/D chip ADS118 and current distributing monitoring chip INA282.
The overcurrent protection module includes audion and relay.
The auxiliary power module includes Buck-Boost reduction voltage circuits, the three terminal regulator 7805 and low being sequentially connected
Pressure drop linear voltage regulator LM117-3.3；The output of Buck-Boost reduction voltage circuits is connected with chip UC3843；Three terminal regulator
7805 output is connected with sampling A/D chip ADS118；The output of low-voltage-drop linear voltage regulator LM117-3.3 is monitored with current distributing
Chip I NA282 connects.
The topological structure for being designed with BOOST boostings in the switch voltage-stabilizing source.220V voltage reduction modules, are completed using transformator
From the near required voltages of 220V.Full-bridge rectifier filter module adopts full-bridge rectifier filter pattern, it is therefore an objective to improve efficiency.It is based on
The BOOST boost modules of UC3843 are the key modules of system, it is therefore an objective to make output voltage stabilization, adjustable.Voltage x current is sampled
Module completes the sampling to output voltage, electric current, it is therefore an objective to real-time monitoring output voltage, electric current, completes feedback, defencive function.
Single chip control module, using MSP430F5529 single-chip microcomputers the control of whole system is completed.Keysheet module, using matrix key
Disk completes the regulation and control to output voltage.Display module, completes the display to output voltage electric current, with good using LCD display
Good man-machine interaction.Overcurrent protection module, using audion relay is driven, and high level is exported by single-chip microcomputer in excessively stream
Control relay disconnects input, realizes defencive function.Auxiliary power module, the voltage transformation that full-bridge rectifier filter module is exported
Into the chip used required voltage of system.
Compared with prior art, this utility model has advantages below and beneficial effect：
（1）In high precision, stepping is adjustable, good stability, and system load regulation is less than 0.1%, and voltage regulation factor is less than
0.01% ；
（2）Efficiency high, can reach more than 90%（3）Complete machine structure is simply compact, shows with current/voltage and transships
Defencive function, man machine interface is friendly.
Description of the drawings
Fig. 1 is integrated circuit module frame chart of the present utility model.
Fig. 2 is the BOOST boost module block diagrams based on UC3843 of the present utility model.
Fig. 3 is sampling module block diagram of the present utility model.
Fig. 4 is overcurrent protection module block diagram of the present utility model.
Fig. 5-1 is the block diagram of Buck-Boost reduction voltage circuits in auxiliary power module of the present utility model.
Fig. 5-2 is three terminal regulator 7805 and low-voltage-drop linear voltage regulator in auxiliary power module of the present utility model
The block diagram of LM117-3.3.
Specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail：
As shown in figure 1, mainly there are 220V voltage reduction modules, full-bridge rectifier filter mould in the switch voltage-stabilizing source of this utility model design
Block, based on the BOOST boost modules of UC3843, voltage x current sampling module, single chip control module, Keysheet module, show mould
The functional modules such as block, overcurrent protection module and auxiliary power module are constituted.220V voltage reduction modules, full-bridge rectifier filter module, base
BOOST boost modules, voltage x current sampling module in UC3843 is sequentially connected, BOOST boost modules, the electricity based on UC3843
Current voltage sampling module is connected respectively with single chip control module, and single chip control module is connected with Keysheet module, display module；
Overcurrent protection module is located at full-bridge rectifier filter module, based between the BOOST boost modules of UC3843, auxiliary power module with
Full-bridge rectifier filter module connects.
Full-bridge rectifier filter module therein adopts full-bridge rectification pattern, its efficiency high and output voltage stabilization.
BOOST boost modules based on UC3843 therein adopt BOOST topological structure, using the PWM ripples of fixed frequency
Controlling switch pipe, realizes that output voltage stabilization, stepping are adjustable by adjusting the dutycycle of PWM ripples.
Based on the BOOST boost modules of UC3843, producing dutycycle using current mode PWM control chip UC3843 can
Adjust PWM ripples.
Electric current obtains current sampling signal by constantan wire sampling resistor in voltage x current sampling module, and voltage passes through resistance
Potential-divider network obtains voltage sampling signal.The current sampling signal that constantan wire sampling resistor is obtained in voltage x current sampling module leads to
Overcurrent shunting monitoring chip INA282 carries out 50 times of amplifications.Resistance pressure-dividing network obtains voltage and adopts in voltage x current sampling module
Sample signal and the current sampling signal of 50 times of amplification are converted into digital signal by high-precision AD S1118.
Voltage signal is compared and is controlled UC3843 outputs by one-chip computer module by receiving above-mentioned digital signal with setting value
The dutycycle of PWM ripples, realizes that output voltage stabilization is adjustable, and current signal is compared with overcurrent protection value, judges whether defeated
Go out the disconnection of high level control relay.
Keysheet module therein is input into using matrix keyboard, output voltage is set by one-chip computer module, while can also
Realize step-by-step adjustment.
Display module therein is driven the voltage x current value for showing that it is obtained by one-chip computer module, there is provided man-machine interaction.
Overcurrent protection module therein is made up of audion and relay, single when current signal is higher than overcurrent protection value
Piece machine control module exports high level and makes system cut-off to the disconnection of transistor base control relay.
Auxiliary power module therein is steady by Buck-Boost reduction voltage circuits, three terminal regulator 7805 and low-voltage drop linear
Depressor LM117-3.3 is constituted, and Buck-Boost reduction voltage circuits drop to 12V and stabilize it to electricity the voltage after rectifying and wave-filtering
Stream mode PWM control chip UC3843 power, and 12V is dropped to 5V and supplied to sampling A/D chip ADS118 by three terminal regulator 7805 again
5V voltages are dropped to 3.3V and are powered to current distributing monitoring chip INA282 by electricity, low-voltage-drop linear voltage regulator LM117-3.3 again.
As shown in Fig. 2 the BOOST boost modules based on UC3843 adopt BOOST topological structure, using the electric current of TI companies
Pattern PWM control chip UC3843 drives switch mosfet as the control chip of Switching Power Supply by generating PWM ripples, uses
AD collection BOOST circuit output voltages after compared with setting voltage relatively come change DA output, so as to change switch PWM dutycycle,
Realize output voltage adjustable in the range of 25V ~ 36V.Coordinate pid control algorithm so that numerical control voltage is quick, accurately real
It is existing.
As shown in figure 3, current sample is to reduce the impact to circuit as far as possible and employ to have in current-voltage sampling module
Temperature drift is little, good stability constantan wire sampling resistor, and has the electric current of 50 times of fixed gains using the signal to Differential Input
Shunting monitoring chip INA282 chips send into high-precision high-speed a/d converter after amplifying to the voltage signal at resistance two ends
ADS1118, voltage sample after output voltage partial pressure then directly to directly inputting sampling A/D chip.ADS1118 is to two input ports
Signal be circulated sampling, and give single-chip microcomputer by sampled data and process and show.
As shown in figure 4, overcurrent protection module adopts relay control module, when electric current is detected overcurrent protection value is more than
It is that single-chip microcomputer exports high level control audion and drives disconnection relay to make system cut-off by I/O mouths.
As shown in figure 5, auxiliary power module is obtained using Buck-Boost reduction voltage circuits that the TPS5430 of TI companies is controlled
12V to needed for current mode PWM control chip UC3843, then using three terminal regulator 7805 and low-voltage drop linear voltage stabilizing
Device LM117-3.3 obtains sampling A/D chip required voltage.
Method or software involved by this utility model is prior art, is not belonging in innovation of the present utility model
Hold, this utility model is only improved and innovation to hardware.
The above is only, to preferred embodiment of the present utility model, not scope of the present utility model to be defined,
Therefore on the premise of without departing from this utility model design spirit, this area ordinary skill technical staff is to described in the utility model
Equivalence changes or decoration that construction, feature and principle are made, all should fall in protection domain of the present utility model.
Claims (7)
1. a kind of switch voltage-stabilizing origin system based on UC3843, it is characterised in that：Including 220V voltage reduction modules, full-bridge rectifier filter
Module, based on the BOOST boost modules of UC3843, voltage x current sampling module, single chip control module, Keysheet module；220V
Voltage reduction module, full-bridge rectifier filter module, it is sequentially connected based on the BOOST boost modules of UC3843, voltage x current sampling module,
It is connected with single chip control module respectively based on the BOOST boost modules of UC3843, voltage x current sampling module, Single-chip Controlling
Module is connected with Keysheet module.
2. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 1, it is characterised in that：Also include with
The display module of single chip control module connection.
3. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 2, it is characterised in that：Also included
Stream protection module and auxiliary power module；Overcurrent protection module is located at full-bridge rectifier filter module, the BOOST liters based on UC3843
Between die block, auxiliary power module is connected with full-bridge rectifier filter module.
4. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 3, it is characterised in that：It is described to be based on
The BOOST boost modules of UC3843 include current mode PWM control chip UC3843 and analog-digital chip DAC8552.
5. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 3, it is characterised in that：The voltage electricity
Stream sampling module includes sampling A/D chip ADS118 and current distributing monitoring chip INA282.
6. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 3, it is characterised in that：The excessively stream is protected
Shield module includes audion and relay.
7. a kind of switch voltage-stabilizing origin system based on UC3843 according to claim 3, it is characterised in that：The auxiliary electricity
Source module includes Buck-Boost reduction voltage circuits, three terminal regulator 7805 and the low-voltage-drop linear voltage regulator being sequentially connected
LM117-3.3；Buck-Boost reduction voltage circuits are connected with chip UC3843；Three terminal regulator 7805 and sampling A/D chip ADS118
Connection；Low-voltage-drop linear voltage regulator LM117-3.3 is connected with current distributing monitoring chip INA282.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621133120.XU CN206099804U (en) | 2016-10-17 | 2016-10-17 | Switch steady voltage source system based on UC3843 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621133120.XU CN206099804U (en) | 2016-10-17 | 2016-10-17 | Switch steady voltage source system based on UC3843 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099804U true CN206099804U (en) | 2017-04-12 |
Family
ID=59975965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621133120.XU Expired - Fee Related CN206099804U (en) | 2016-10-17 | 2016-10-17 | Switch steady voltage source system based on UC3843 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206099804U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363426A (en) * | 2020-10-22 | 2021-02-12 | 北京航天光华电子技术有限公司 | Intelligent power-on system |
| CN116088625A (en) * | 2023-04-07 | 2023-05-09 | 河北极太科技有限公司 | Output voltage regulating circuit |
-
2016
- 2016-10-17 CN CN201621133120.XU patent/CN206099804U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363426A (en) * | 2020-10-22 | 2021-02-12 | 北京航天光华电子技术有限公司 | Intelligent power-on system |
| CN116088625A (en) * | 2023-04-07 | 2023-05-09 | 河北极太科技有限公司 | Output voltage regulating circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20171017 |