CN209072343U - A kind of wide-range voltage and High-current output power-supply system - Google Patents

A kind of wide-range voltage and High-current output power-supply system Download PDF

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Publication number
CN209072343U
CN209072343U CN201821920227.8U CN201821920227U CN209072343U CN 209072343 U CN209072343 U CN 209072343U CN 201821920227 U CN201821920227 U CN 201821920227U CN 209072343 U CN209072343 U CN 209072343U
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oxide
semiconductor
metal
voltage
output
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魏海波
邓标华
唐文天
裴敬
孟杨
丁浩
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Wuhan Jing Hong Electronic Technology Co Ltd
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Wuhan Jing Hong Electronic Technology Co Ltd
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Abstract

The utility model discloses a kind of wide-range voltages and High-current output power-supply system, provide driving voltage and electric current to the first metal-oxide-semiconductor using standard buck circuit;And the comparison result of the output feedback voltage V FB and preset target voltage Vset according to the first metal-oxide-semiconductor adjust the conduction impedance of the first metal-oxide-semiconductor, so that the work of the first metal-oxide-semiconductor is in crossing current area, to realize that wide-range voltage and the stablizing for high current of power-supply system export, solves the narrow difficult point of current non-isolated module output voltage adjustable extent, output electric current is solved simultaneously in the case where a wide range of dynamic change, output voltage fluctuates larger problem, optimizes the ripple and precision index of wide range output power supply.

Description

A kind of wide-range voltage and High-current output power-supply system
Technical field
The utility model belongs to power supply design field, and in particular to a kind of wide-range voltage and High-current output power supply system System.
Background technique
With the development of the technologies such as material, technique, the scale of IC integrated circuit is increasing, semiconductor devices communication, The application in the fields such as computer, medical treatment is also more and more extensive, then ATE (Automatic Test Equipment, it is automatic to test Equipment) system just seems most important to the detection of the index of semiconductor, function, reliability.ATE system mainly by host computer, Core plate, DIB (Device Interface Board, equipment under test interface board) plate are constituted, and pass through host computer load test journey Sequence, operation generates the signals such as suitable voltage/current/timing/functional status on core plate, and signal is given on DIB plate DUT (Device Under Test, detected device) device, the response of finally detection comparison DUT, to judge equipment under test Whether performance/reliability meets design requirement.
ATE system can test a variety of DUT by replacement DIB board, since different DUT devices is to the need of supply voltage Ask different, segment chip needs to carry out electric power pulling bias testing, and the output that this just needs CORE board to be capable of providing wide scope is electric Pressure, and voltage can carry out on-line tuning according to the demand of DUT.While in order to meet the shipment demand of chip manufacturer, accelerate DUT Test speed, especially aging testing apparatus, the DUT integrated on monolithic DIB board can be with up to 320pcs, load current Demand is up to 100A.This requires that core board veneer has the power supply plan of output high current
There are two types of the schemes of ATE equipment power supply at present: (Device Power Supplies is surveyed by DPS for a kind of scheme Try equipment power supply) chip be DUT equipment power, as disclosed in patent document CN201520083776.4 utilization DPS chip The serial/parallel mode of two Switching Power Supplies of control is gone to realize the power supply output of wide scope, the control of this scheme is complicated, negative in high current In the case where load, if the function of not flowing, the power supply that will lead to two modules is unbalanced, and module is defeated using paralleling model Precision and efficiency out is difficult to be guaranteed, meanwhile, the output voltage of DPS chip is flexibly adjustable, but exports current limited, mesh Preceding DPS chip drives ability maximum in the market is in 2A or so.It is unable to satisfy the demand of load high current.
Another scheme DC-DC (DC to DC) module for power supply, the module output current of mainstream can be up to several at present Ten amperes, but output voltage is mostly in 0.5V~5.5V.It is not able to satisfy the demand of 6V or more, pressure regulation is forced to will cause inductance parameters Mismatch is not unstable so as to cause the loop of circuit, at the same output accuracy/ripple/dynamic response characteristic of module be difficult to meet it is negative Carry chip requirement.Patent document CN201620110801.8 discloses a kind of utilization AC-DC (exchange turns direct current) Switching Power Supply, leads to It crosses filtering-rectification mode and realizes wide output voltage, but the program is not suitable for the application environment of DC-DC, be unable to satisfy pair Export Width funtion, high current non-isolated power supply demand.
Utility model content
Aiming at the above defects or improvement requirements of the prior art, the utility model provides a kind of wide-range voltage and big electricity Out-put supply system is flowed, provides driving voltage and electric current to the first metal-oxide-semiconductor using standard buck circuit;And according to comparator tune The conduction impedance of whole first metal-oxide-semiconductor, so that the first metal-oxide-semiconductor works in crossing current area, to realize the wide-range voltage of the first metal-oxide-semiconductor It is exported with stablizing for high current.
To achieve the above object, according to the one aspect of the utility model, a kind of wide-range voltage and high current are provided Out-put supply system, the system include BUCK module and electric current optimization module, and the output end connection electric current of BUCK module optimizes mould The input terminal of block, the output end of electric current optimization module connect the input terminal of load to be measured, the output feedback end of electric current optimization module The second control terminal of electric current optimization module is connected,
BUCK module includes standard buck circuit, BUCK module using standard buck circuit provide driving voltage and electric current to Electric current optimization module;
Electric current optimization module includes the first metal-oxide-semiconductor and comparator, and two input terminals of comparator are separately connected the first metal-oxide-semiconductor Output feedback end and preset target voltage Vset, the output end of comparator connects the control terminal of the first metal-oxide-semiconductor, and comparator is logical The conduction impedance for crossing the first metal-oxide-semiconductor of adjustment makes the work of the first metal-oxide-semiconductor in crossing current area, to realize wide-range voltage and high current Stablize output.
The system further includes D/A converter module as a further improvement of the utility model, and D/A converter module includes FPGA and D/A converting circuit, the first control terminal of the first output end connection comparator of D/A converter module, digital-to-analogue conversion mould Block exports preset target voltage Vset to comparator using FPGA control D/A converting circuit.
The working range of the load current ID of the first metal-oxide-semiconductor is 25~30A as a further improvement of the utility model, The pressure-resistant VDS of first metal-oxide-semiconductor is greater than 25V, and the conduction impedance working range of the first metal-oxide-semiconductor is 1~3m Ω.
Standard buck circuit includes a DC-DC DC conversion modules and the as a further improvement of the utility model, Two metal-oxide-semiconductors, DC-DC DC conversion modules offer pwm control signal driving the second metal-oxide-semiconductor realization input 12V to output 0.6~ The voltage of 10V is converted.
The working range of the load current ID of the second metal-oxide-semiconductor is 25~30A as a further improvement of the utility model, The pressure-resistant VDS of second metal-oxide-semiconductor is greater than 25V, and the conduction impedance working range of the second metal-oxide-semiconductor is 1~3m Ω.
The control of the second output terminal connection BUCK module of D/A converter module as a further improvement of the utility model, End, D/A converter module using FPGA control D/A converting circuit export Vtrim to BUCK module control terminal to adjust BUCK The output voltage of module.
BUCK module provides driving electricity using two two-phase BUCK circuit in parallel as a further improvement of the utility model, Pressure and electric current give the first metal-oxide-semiconductor, and the pwm control signal phase difference of two-phase buck circuit is 180 degree, and every phase is respectively adopted two Metal-oxide-semiconductor parallel output.
The defeated of difference cabling Vense+ and Vsense- sampling load end is utilized as a further improvement of the utility model, Enter voltage Vs and feed back to comparator, comparator realizes load end input voltage according to the sampled result of Vense+ and Vsense- Distal end compensation.
In general, have the above technical solutions conceived by the present invention are compared with the prior art, with following Beneficial effect:
A kind of wide-range voltage and High-current output power-supply system of the utility model, utilize standard buck circuit to provide drive Dynamic voltage and current gives the first metal-oxide-semiconductor;And output feedback voltage V FB and preset target voltage Vset according to the first metal-oxide-semiconductor Comparison result adjust the first metal-oxide-semiconductor conduction impedance so that the first metal-oxide-semiconductor work crossing current area, thus realize the first metal-oxide-semiconductor Wide-range voltage and high current stablize output, solve the current narrow difficult point of non-isolated module output voltage adjustable extent.
A kind of wide-range voltage and High-current output power-supply system of the utility model, by controlling digital-to-analogue using FPGA Conversion circuit exports preset target voltage Vset, while exporting Vtrim using FPGA control D/A converting circuit and giving BUCK mould The control terminal of block solves output electric current in the case where a wide range of dynamic change to adjust the output voltage of BUCK module, defeated The larger problem of voltage fluctuation out optimizes the ripple and precision index of wide range output power supply.
A kind of wide-range voltage and High-current output power-supply system of the utility model, to equipment under test DUT in ATE system Power demands analysis, by DC-DC DC conversion modules provide pwm control signal drive the second metal-oxide-semiconductor realize input 12V arrive The voltage conversion of 0.6~10V is exported, while by exporting after being connected in parallel using two standard buck circuits and two metal-oxide-semiconductors Driving voltage and electric current are realized in the case where wide-range voltage output, guarantee the driving capability of power-supply system 50A high current, The cost of wide range output power module is reduced simultaneously.
A kind of wide-range voltage and High-current output power-supply system of the utility model are strong using anti-common mode interference ability The input voltage that difference cabling samples load end realizes the distal end compensation of load end input voltage.
Detailed description of the invention
Fig. 1 is the structural representation of a kind of wide-range voltage and High-current output power-supply system of the utility model embodiment Figure;
Fig. 2 is the process signal of a kind of wide-range voltage and High-current output power-supply system of the utility model embodiment Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this Utility model is not used to limit the utility model.
As long as in addition, technical characteristic involved in the various embodiments of the present invention described below each other it Between do not constitute conflict and can be combined with each other.The utility model is further described With reference to embodiment.
Utility model content is introduced for convenience, and definition and explanation relational language are as follows:
ATE:Automatic Test Equipment automatic test equipment;
DUT:Device Under Test detected device;
The power supply of DPS:Device Power Supplies test equipment;
DAC:Digital to analog converter digital analog converter;
DIB:Device Interface Board equipment under test interface board;
Fig. 1 is the structural representation of a kind of wide-range voltage and High-current output power-supply system of the utility model embodiment Figure.As shown in Figure 1, the system includes BUCK module, electric current optimization module and D/A converter module, wherein BUCK module it is defeated Outlet connects the input terminal of electric current optimization module, and the output end of electric current optimization module connects the input terminal of load to be measured;Digital-to-analogue turns Change the mold the first control terminal of the first output end connection electric current optimization module of block, the second output terminal connection of D/A converter module The control terminal of BUCK module, the second control terminal of the output feedback end connection electric current optimization module of electric current optimization module are to be measured negative The difference sampled voltage for carrying input terminal is separately connected the third control terminal and the 4th control terminal of electric current optimization module.
BUCK module is the buck electricity of standard for providing the driving voltage and electric current of electric current optimization module, BUCK module Road, the buck circuit of standard include a DC-DC DC conversion modules and the second metal-oxide-semiconductor, and DC-DC DC conversion modules provide The voltage that pwm control signal drives the second metal-oxide-semiconductor to realize input 12V to 0.6~10V of output is converted.
As a preferred scheme, BUCK module preferably use two two-phase BUCK circuit in parallel provide driving voltages and Electric current gives the first metal-oxide-semiconductor, and the pwm control signal phase difference of two-phase buck circuit is 180 degree, and two metal-oxide-semiconductors are respectively adopted in every phase Parallel output, BUCK module highest are able to achieve the load current output of 50A.
Since the output voltage range of BUCK module is very wide, the adaptation requirement of loop parameter is very high, and BUCK module is close When height output limit, output voltage Vout precision is lower, and ripple becomes larger, and big load current can also make BUCK module Dynamic response is exported to be deteriorated.The output voltage range of BUCK module: 0.6~10V, but since its output voltage range is wide and defeated Electric current is big out, and inductance/capacitance/MOS type selecting and switching frequency can all influence its output performance in BUCK module, in order to be adapted to height The output demand of voltage high-current, inductance inductance value/capacitor's capacity is relatively large, and the output of BUCK module low pressure is caused to start overshoot It is larger, while will lead to that output dynamic response is slack-off, and when load voltage and electric current wide variation will lead to output voltage and fall, To influence the precision and stability of power supply output.
D/A converter module is for providing the pressure regulation signal of BUCK module and electric current optimization module.D/A converter module includes One FPGA, D/A converter module export Vset under the control of FPGA and provide benchmark electricity for the comparator of electric current optimization module Pressure;D/A converter module exports Vtrim under the control of FPGA and hinders the control terminal for being connected to BUCK module, digital-to-analogue conversion by going here and there Module adjusts the output voltage of BUCK module by Vtrim, specifically: when the value of string resistance R must be that Vtrim level is higher, defeated The voltage of Vout is lower out;Conversely, Vtrim level is lower, the voltage for exporting Vout is higher.
Electric current optimization module is used to optimize the output accuracy of power supply, specifically: in order to stablize the output of BUCK module, Electric current optimization module is added in BUCK module rear class, for optimizing the output accuracy, ripple, dynamic response characteristic of power supply.Electric current is excellent Changing module ensure that the stabilization of output VS, electric current optimization module include the first metal-oxide-semiconductor and a comparator, wherein the first metal-oxide-semiconductor For providing big electric current output, comparator comes by comparing electric current optimization circuit output feedback voltage V FB and preset target The size of voltage Vset is controlled the conduction impedance of the first metal-oxide-semiconductor of power switch by the output of comparator, passes through comparator Output control the first metal-oxide-semiconductor of power switch work is in crossing current area, to realize that the output accuracy of optimization power supply, ripple, dynamic are rung Characteristic is answered,
When electric current optimizes circuit output feedback voltage V FB > preset target voltage Vset, the conduction impedance of the first metal-oxide-semiconductor Become larger, the first metal-oxide-semiconductor pressure drop increases, so that VS becomes smaller;
When electric current optimizes circuit output feedback voltage V FB < preset target voltage Vset, the conduction impedance of the first metal-oxide-semiconductor Become smaller, the first metal-oxide-semiconductor pressure drop reduces, and VS becomes larger;
When electric current optimizes the preset target voltage Vset of circuit output feedback voltage V FB=, the conduction impedance of the first metal-oxide-semiconductor Stablize, electric current optimizes the output voltage VS=Vset of circuit.
The output voltage range of electric current optimization module: keeping 1V with the output pressure difference of BUCK module, and adjustable extent is 0.5~ The precision of 9V, electric current optimization module output voltage are mainly influenced (general error by the error of comparator and operational amplifier itself It is smaller), little with the accuracy relation of electric current optimization module, to compensate for, electric current optimization module output ripple is big, and precision is low, moves The shortcomings that state low-response.
Electric current optimization module can also be used in realize distal end compensate, specifically: electric current optimization module be output to DUT need by Connector or longer PCB trace can generate biggish pressure drop, since load current is larger in order to compensate for line on PCB route Road pressure drop removes sampling VS using difference cabling Vense+ and the distal end Vsense- DUT load end by anti-, and feedback arrives comparator Input, using the on state of output the first metal-oxide-semiconductor of control of comparator, to compensate the pressure drop of VS.Wherein Vense+/ Vsense- provides the function of distal end compensation, makes up the pressure drop of VS route under high current working condition, further improves defeated The precision of VS out.
Fig. 2 is the process signal of a kind of wide-range voltage and High-current output power-supply system of the utility model embodiment Figure.As shown in Fig. 2, specific steps are as follows:
Step 1: FPGA controls the Vtrim level of DAC output initialization, and the trim pin of R to BUCK module is hindered by string, For the initial output voltage size of BUCK module is arranged;
Step 2: FPGA controls the enabled of PWR_ON control BUCK module, and BUCK module is made to export initial Vout voltage.
Step 3: determining the size of the supply voltage VS of equipment under test DUT, and it is final which is that power-supply system to be exported Target voltage.
Step 4: FPGA control DAC output Vtrim=VS+1V makes Vout=VS to adjust the output voltage of BUCK module + 1V, in order to which the power switch tube for making up PCB line drop and guarantee electric current optimization module is smoothly connected, Vout ratio VS is higher by 1V。
Step 5: FPGA controls D/A converter module and exports Vset=VS, provides reference voltage for electric current optimization module, comes The output voltage VS of design current optimization module.
Step 6: FPGA controls VS_ON enable signal, controls leading for the first metal-oxide-semiconductor of power switch tube of electric current optimization module It is logical, so that electric current optimization module exports final target voltage VS.
Step 7: VS is sent to DUT measured device by driving current, is powered for it.
Step 8: if the DUT equipment of test is same model, supply voltage VS is remained unchanged, and completes power supply.If DUT equipment under test model is replaced, needs to execute back to step 3 sequence, redefines VS voltage, adjust BUCK module and electric current Optimization module output voltage meets the power demands of new DUT.
Step 9: VS keeps stablizing, and power supply is completed.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not To limit the utility model, any modification made within the spirit and principle of the present invention, equivalent replacement and change Into etc., it should be included within the scope of protection of this utility model.

Claims (8)

1. a kind of wide-range voltage and High-current output power-supply system, which includes BUCK module and electric current optimization module, The input terminal of the output end connection electric current optimization module of BUCK module, the output end of electric current optimization module connect the defeated of load to be measured Enter end, the second control terminal of the output feedback end connection electric current optimization module of electric current optimization module, which is characterized in that
The BUCK module includes standard buck circuit, and the BUCK module provides driving voltage and electricity using standard buck circuit It flows and gives electric current optimization module;
The electric current optimization module includes the first metal-oxide-semiconductor and comparator, and two input terminals of comparator are separately connected the first metal-oxide-semiconductor Output feedback end and preset target voltage Vset, the output end of comparator connects the control terminal of the first metal-oxide-semiconductor, and comparator is logical The conduction impedance for crossing the first metal-oxide-semiconductor of adjustment makes the work of the first metal-oxide-semiconductor in crossing current area, to realize wide-range voltage and high current Stablize output.
2. a kind of wide-range voltage according to claim 1 and High-current output power-supply system, which is characterized in that the system It further include D/A converter module, D/A converter module includes FPGA and D/A converting circuit, the first output of D/A converter module First control terminal of end connection comparator, D/A converter module export preset target electricity using FPGA control D/A converting circuit Press Vset to comparator.
3. a kind of wide-range voltage according to claim 1 and High-current output power-supply system, which is characterized in that first The working range of the load current ID of metal-oxide-semiconductor is 25~30A, and the pressure-resistant VDS of the first metal-oxide-semiconductor is greater than 25V, and the first metal-oxide-semiconductor is led Logical impedance working range is 1~3m Ω.
4. a kind of wide-range voltage according to claim 1 and High-current output power-supply system, which is characterized in that the mark Quasi- buck circuit includes a DC-DC DC conversion modules and the second metal-oxide-semiconductor, and DC-DC DC conversion modules provide PWM control letter Number driving the second metal-oxide-semiconductor realize input 12V to output 0.6~10V voltage convert.
5. a kind of wide-range voltage according to claim 4 and High-current output power-supply system, which is characterized in that second The working range of the load current ID of metal-oxide-semiconductor is 25~30A, and the pressure-resistant VDS of the second metal-oxide-semiconductor is greater than 25V, and the second metal-oxide-semiconductor is led Logical impedance working range is 1~3m Ω.
6. a kind of wide-range voltage according to claim 1 and High-current output power-supply system, which is characterized in that digital-to-analogue turns The control terminal of the second output terminal connection BUCK module of block is changed the mold, D/A converter module is defeated using FPGA control D/A converting circuit Vtrim adjusts the output voltage of BUCK module to the control terminal of BUCK module out.
7. a kind of wide-range voltage according to claim 1 and High-current output power-supply system, which is characterized in that described BUCK module provides driving voltages and electric current to the first metal-oxide-semiconductor using two two-phase BUCK circuit in parallel, two-phase buck circuit Pwm control signal phase difference is 180 degree, and two metal-oxide-semiconductor parallel outputs are respectively adopted in every phase.
8. a kind of wide-range voltage and High-current output power-supply system described in any one of -7 according to claim 1, feature Be, using difference cabling Vense+ and Vsense- sampling load end input voltage Vs and feed back to comparator, comparator according to The distal end compensation of load end input voltage is realized according to the sampled result of Vense+ and Vsense-.
CN201821920227.8U 2018-11-20 2018-11-20 A kind of wide-range voltage and High-current output power-supply system Active CN209072343U (en)

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CN201821920227.8U CN209072343U (en) 2018-11-20 2018-11-20 A kind of wide-range voltage and High-current output power-supply system

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Application Number Priority Date Filing Date Title
CN201821920227.8U CN209072343U (en) 2018-11-20 2018-11-20 A kind of wide-range voltage and High-current output power-supply system

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