CN101795071B - DC-DC power supply device, voltage regulation method and network equipment - Google Patents
DC-DC power supply device, voltage regulation method and network equipment Download PDFInfo
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Abstract
The invention relates to the technical field of electronics and discloses a DC-DC power supply device, a voltage regulation method and network equipment in order to improve the testability of circuits. In the invention, at least one regulation module and a control module are arranged in the DC-DC power supply device, wherein the control module controls the conduction states of upper and lower switch tubes in a resistor array in the regulation module so as to regulate the offset of an output voltage to control the size of the output voltage. Thus, the synchronous regulation of one or more DC-DC switch power supply modules can be realized without manual box opening and power-interrupting operation and the precision regulation of the output voltages of the DC-DCs switch power supply modules is realized without a large amount of circuit hardware regulation and change, so that the testability of the circuit and operation smoothness of the whole circuit test process are improved effectively and the product test and examination work is very convenient. The invention also discloses the power supply method and the network equipment.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of DC-DC supply unit, voltage adjusting method and the network equipment
Background technology
Generally, integrated chip is reliablely and stablely worked, its supply power voltage need to be controlled in the setting range, namely require the supply power voltage value to be between a minimum value and the maximum.Less than minimum value or greater than peaked situation, will cause chip operation unstable if there is the chip power supply magnitude of voltage, even damage.
In the electric supply system design phase of product, with reference to design and each chip power supply demand, carry out forming each chip power supply potential circuit after theory is calculated, but because the otherness of device parameters in the circuit, the problem that there are error in Theoretical Design value and actual acquisition value may appear, as, actual value has exceeded the supply district of chip requirement, and this may reduce the stability of chip long-term work.Therefore, in the reliability testing stage of product, reliability for the proof scheme system, (minimum value is lower limit usually to need that each chip power supply voltage is adjusted into the limiting value of its power demands scope simultaneously synchronously, maximum is higher limit), and require test not to be interrupted, with the job stability of checking product under the voltage limit pressure condition.
When the circuit power system, often run into the situation that the power supply that the outside need to be provided changes into the specified circuit working power, for example the supply voltage that provides of external electrical network is alternating current 220V, and electronic product need of work voltage is the power supply of direct current 3.3V, at this moment need to use particular electrical circuit existing power supply to be converted to the power supply that can satisfy the circuit instructions for use, this technology of finishing power source conversion function is exactly the power conversion technology, and the circuit that can finish the power conversion function is referred to as the power conversion module.Usually we are called the primary power source module with the module that grid alternating current is converted to low-voltage direct output, and the module that low-voltage direct is converted to each road DC power supply output of product needed is called secondary power supply or plate level power supply.Consult shown in Figure 1ly, the plate level power supply comprises linear power supply and DC-DC Switching Power Supply, the low-voltage dc voltage of input can be transformed to each road output voltage that chip operation needs, and keep very high conversion efficiency.As shown in Figure 1, the DC-DC Switching Power Supply comprises a DC-DC controller, up and down two electronic switches, outputting inductance/electric capacity and feedback loops.Up and down switch is closed in opening of DC-DC controller cycle, produces the power supply square wave of one-period, then by inductance/capacitance this square wave is carried out smothing filtering and obtains stably DC power supply output.Feedback loop is by the monitoring output voltage, thereby realizes the stable of output supply voltage the switching time of adjusting accordingly upper switch and lower switch; The DC-DC power supply will obtain electric current from input voltage when upper switch opens, and output voltage rises; Then descend switch opens when upper switch cuts out, input voltage goes out not provide electric current, relies on inductance component that output current is provided.Therefore to obtain electric current from input voltage be size variation periodically to the DC-DC power supply.The DC-DC power supply is delivered to output with the power of input voltage by electronic switch and inductance, generally can realize up to the power conversion efficient more than 90%, so the widely application that obtains in electronic system.
At present, owing to often needing the different power supply of multiple voltage value during the work of communication apparatus isoelectronic series system, thereby on Power Management Design, normally provide a public DC power supply from the outside, then use the respectively conversion power supply output 1..N that obtains the different magnitudes of voltage of multichannel that need of a plurality of power conversion modules, power to work system.This provides the circuit of multiple-output electric power to be called traditionally the multi-output power supply system to work system, as shown in Figure 2.
In the power supply output procedure, because the reason of circuit itself the output offset amount can occur usually, namely there are a certain amount of difference in the voltage of actual output and the typical output voltage of design.Its specific formula for calculation is as follows:
For example, suppose that a certain power supply output exemplary voltages value is 10V, and the actual output voltage value is 10.1V, the output offset amount that then can draw this power supply according to above-mentioned formula is 1%; Again for example, the design output valve of a certain power supply is 3.3V, and the actual output voltage value is 3.333V, and the output offset amount of this power supply also is 1% so; Conversely, make the output offset amount of the power supply of the original 3.3V of being output as be adjusted into 1%, its output voltage values need only be adjusted into 3.333V and get final product.
Consult Fig. 1 and shown in Figure 3, in order to adjust according to the real work demand of circuit the output voltage values of DC-DC Switching Power Supply, the make-and-break time ratio of switch and lower switch in the adjustment of common employing DC-DC controller, thus realization is to the adjustment of DC-DC electric power output voltage.Its major programme comprises following two kinds, mainly contains at present following two schemes:
The first scheme is: consult shown in Figure 3, be input to the feedback end of DC-DC controller after resistance R 1 in the DC-DC switch power source output voltage process feedback loop, the R2 dividing potential drop, the DC-DC controller is adjusted output valve according to the magnitude of voltage that feeds back, the magnitude of voltage of feedback is higher, then the DC-DC controller starts the up and down make-and-break time ratio of switching tube of internal circuit control, and output voltage is reduced; The magnitude of voltage of feedback is on the low side, then makes in a like fashion output voltage is raise.The resistance value of R1 and R2 is calculated according to the output requirements and is set, and the in a single day setting of the resistance value of R1 and R2, and under the circuit normal operation, DC-DC Switching Power Supply output valve is fixing.
First scheme is: consult shown in Figure 4ly, than the first scheme, the implementation of putting down in writing among Fig. 4 has increased variable resistor VR1, VR1 can be mechanical variable resistance, its resistance is adjusted in control mechanically, also can be the electronic type variable resistor, adjusts its resistance by circuit control.By adjusting the resistance of VR1, the magnitude of voltage of R1 and R2 intermediate point is changed, and then the feedback voltage value that feeds back to the DC-DC controller is changed thereupon, like this, the DC-DC controller has namely been realized the adjustment of output voltage after adjusting accordingly action according to the feedback voltage that receives.
The implementation of putting down in writing among above-mentioned Fig. 3 can play the effect of regulated output voltage, but do not possess the function of adjusting the DC-DC switch power source output voltage, the implementation of putting down in writing among Fig. 4 is the improvement of scheme shown in Figure 3, can realize the adjustment of output voltage values, but the function that does not possess the synchronous adjustment that realizes the different DC-DC Switching Power Supply outputs of multichannel, because under the prior art, when each chip interconnect, for the most abominable operating position in the realistic application of situation that output voltage increases with the stepping skew or while stepping skew reduces, thereby make circuit working in various combinations the most badly use state, be convenient to the engineer and find early to design hidden danger and circuit problem.On the other hand, if adopt implementation shown in Figure 4, the outage of must unpacking when adjusting the output voltage side-play amount could be implemented, thereby destroyed the continuity of integrated circuit testing process, and adopt manual single channel adjustment can't after can't with the circuit Exact recovery to before output state, be unfavorable for that also fault recurrence is surveyed in the test in later stage.
Summary of the invention
The embodiment of the invention provides a kind of DC-DC supply unit, voltage adjusting method and the network equipment, in order to improve the testability of circuit.
The concrete technical scheme that the embodiment of the invention provides is as follows:
A kind of DC-DC supply unit, comprise a plurality of DC-DC switch power modules, corresponding with each DC-DC switch power module many groups of the first feedback resistances and the second feedback resistance, described the first feedback resistance one end connects the power output end of DC-DC switch power module, the other end is by described the second feedback resistance ground connection, tie point between the first feedback resistance and the second feedback resistance connects the feedback voltage input of DC-DC switch power module, also comprises:
A plurality of adjusting modules, each adjusting module all links to each other with a DC-DC switch power module, and comprise at least one component piezoresistance, described at least one component piezoresistance comprises: the first divider resistance, the second divider resistance, the first switch and second switch, described the first divider resistance is in parallel with corresponding the first feedback resistance with the branch road after the first switch is connected, described the second divider resistance is in parallel with corresponding the second feedback resistance with the branch road after second switch is connected, and described the first switch and second switch are adjusted conducting state according to the signal of control end;
Control module, connect described the first switch and second switch by control end, be used for the default configuration parameter of basis from described control end output signal, control the conducting state of described the first switch and second switch, to adjust the side-play amount of described DC-DC switch power module output voltage.
A kind of method of supplying power to adopts above-mentioned DC-DC switch power module to power.
A kind of network equipment comprises above-mentioned DC-DC supply unit.
In the embodiment of the invention, in the DC-DC supply unit, set up a plurality of adjusting modules, an and control module, by the conducting state of switching tube up and down in the resistor matrix in this control module control adjusting module, to adjust the side-play amount of output voltage, thereby reach the purpose of control output voltage size, like this, the power operation that need not manually to unpack can be realized the synchronizing voltage adjustment of multichannel DC-DC switch power module, and need not to carry out in the situation that a large amount of circuit hardware adjustment changes, realized the output voltage of accurate adjustment DC-DC switch power module, thereby Effective Raise the testability of circuit, the operation fluency of integrated circuit testing process, and the stability that has promoted circuit also provide very big convenience for product test and work for inspection.
Description of drawings
Fig. 1 is DC-DC power principle frame diagram under the prior art;
Fig. 2 is multichannel DC-DC power supply schematic diagram under the prior art;
Fig. 3 is the first feedback loop principle framework figure in the DC-DC power supply under the prior art;
Fig. 4 is the second feedback loop principle framework figure in the DC-DC power supply under the prior art;
Fig. 5 is DC-DC control circuit schematic diagram in the embodiment of the invention;
Fig. 6 is adjusting module principle framework figure in the embodiment of the invention;
Fig. 7 is control module principle framework map in the embodiment of the invention.
Embodiment
For the DC-DC supply unit, in order to improve the testability of circuit, in the embodiment of the invention, a plurality of DC-DC switch power modules are set in described DC-DC supply unit, corresponding with each DC-DC switch power module many groups of the first feedback resistances and the second feedback resistance, described the first feedback resistance one end connects the power output end of DC-DC switch power module, the other end is by described the second feedback resistance ground connection, tie point between the first feedback resistance and the second feedback resistance connects the feedback voltage input of DC-DC switch power module, also comprises:
A plurality of adjusting modules, each adjusting module all links to each other with a DC-DC switch power module, and comprise at least one component piezoresistance, described at least one component piezoresistance comprises: the first divider resistance, the second divider resistance, the first switch and second switch, described the first divider resistance is in parallel with corresponding the first feedback resistance with the branch road after the first switch is connected, described the second divider resistance is in parallel with corresponding the second feedback resistance with the branch road after second switch is connected, and described the first switch and second switch are adjusted conducting state according to the signal of control end;
Control module, connect described the first switch and second switch by control end, be used for the default configuration parameter of basis from described control end output signal, control the conducting state of described the first switch and second switch, to adjust the side-play amount of described DC-DC switch power module output voltage.
Below in conjunction with accompanying drawing the preferred embodiment of the present invention is elaborated.
Consult shown in Figure 5, circuit comprises one or more DC-DC power modules (being also referred to as the DC/DC module) that contain the output voltage feedback end, be labeled as respectively DC-DC_1～DC-DC_n, the power input VIN of each DC-DC power module links to each other with input power, the power output end VOUT of each DC-DC power module links to each other with each road load circuit on the pcb board, and the pressure feedback port of each DC-DC power supply (VOUT_FB) is connected with the feedback circuit module.
Adjusting module is a resistance conversion matrix, be connected with feedback input end, power output end and the control module of DC-DC power module respectively, each DC-DC power module disposes corresponding adjusting module, as shown in Figure 5, is respectively adjusting module 1～adjusting module n.
The preset configuration parameter output control signal of control module basis K1-Kn as shown in Figure 7, by controlling the compound mode of the resistor matrix in the corresponding adjusting module, realize the variation of divider resistance resistance, thereby adjust the output voltage of corresponding DC-DC power module.
Consult shown in Figure 6ly, based on circuit shown in Figure 5, adjusting module (can be arbitrary among adjusting module 1～adjusting module n) is by M1 ... the resistance conversion matrix that MN forms.M1 ... MN is respectively different side-play amount Circuit tunings, for example, and M1 correspondence+/-1% side-play amount adjustment, M2 correspondence+/-2% side-play amount adjustment ... the MN correspondence+/-adjustment of N% side-play amount.During specific implementation, can set different side-play amount Circuit tuning quantity according to the needs of adjusting range, for example, adjusting range is+/-3% the time, namely only need M1 ... the Circuit tuning of M3, all the other Circuit tunings can remove.
Each Mx module is by switching tube Qx, switching tube Qx+1, resistance R a(x), resistance R b(x), resistance R c(x), resistance R d(x) form; Wherein, x=1,2,3 ... N.
As shown in Figure 5, switching tube Qx can adopt common triode or field effect transistor, and switching tube Qx+1 also can adopt common triode or field effect transistor, and certainly, switching tube Qx and Qx+1 can also adopt relay, repeat no more; Rc(x) and Rd(x) be conventional, electric-resistance, in circuit, play metering function, Rc(x) be connected with base stage or the grid of switching tube Qx, Rd(x) be connected with base stage or the grid of switching tube Qx+1, Ra(x) and Rb(x) be precision resister, along with the conducting of corresponding switching tube respectively and receive on R1 and the R2, realizing the divider resistance change in resistance, thereby realize the adjustment of corresponding side-play amount.Each Mx module is by control signal up(x) and incoming level down(x) come closing of control switch pipe Qx and Qx+1 and conducting, for example, when being high up(x), the Qx cut-off, when being low up(x), then conducting of Qx, when being high down(x), the Qx+1 conducting, when being low down(x), Qx+1 then ends.
Control signal up(1) ... up(N) and down(1) ... down(N), exported according to default configuration parameter by control module, consult shown in Figure 7, control module comprises a controller and a switch combination, controller can have the chip of similar functions for central processor core (Central Processing Unit, CPU) or other.K1 ... KN is control up(1) ... up(N) and down(1) ... down(N) output switch is set, can carry out cut-off/close according to the delay start sequential of Set arbitrarily, by the output voltage side-play amount of compound mode control M1-MN, as, the closed K1 of elder generation is with control M1, after 1 hour, disconnect K1, closed K2 is with control M2, etc., also can be K1 and M1, the one to one independent control mode of KN and MN be enumerated no longer one by one at this.
Consult shown in Figure 7ly, K1 controls up(1) and output down(1), the like, KN controls up(N) and output down(N).Whether the cut-off/close of Kx has determined the output voltage of DC-DC power module is carried out the side-play amount adjustment, consult shown in the table 1 Kx(x=1,2,3 ... N) cut-off/close and up(x) and down(x) corresponding relation between signal condition and the switching tube state is as follows:
Table 1
Based on above-mentioned principle, in the embodiment of the invention, the flow process of control module work is as follows:
Take a DC-DC power module as example, circuitry is determined the time control of this DC-DC power module output voltage side-play amount and switching according to the combination set point of the K1-KN of control module.When not needing to carry out the adjustment of output voltage output offset amount, control module control up(1) ... up(N) be output as high level, down(1) ... down(N) be output as low level, at this moment, each side-play amount Circuit tuning (is M1 in the adjusting module in the DC-DC power module ... MN) up and down switching tube Qx and Qx+1 are cut-off state, adjusting module can not exert an influence to the dividing potential drop of the R1 in the feedback loop and R2, and the voltage of DC-DC power module output is constant, still is original value.
When need to the output voltage of DC-DC power module be carried out-when the side-play amount of x% is adjusted, control module control up(x) output becomes low level by high level, other each road control signal outputs remain unchanged, this moment, the Qx of Mx became conducting by cut-off, other switching tube still is in cut-off state, behind the Qx saturation conduction, Ra (x) namely is connected in parallel with R1, resistance can diminish after the resistance parallel connection, therefore, make the dividing potential drop on the R2 become large, like this, the voltage that sends back the FB pin of DC-DC power module also will raise, and in case after detecting the VOUT_FB variation, the DC-DC controller namely starts corresponding control flow, and the output voltage VO UT that reduces DC-DC power module this moment arrives-X%, finishes the adjustment of a negative side-play amount of output voltage.。
And when the side-play amount of definite need to carrying out output voltage+x% is adjusted, control module is connected Kx equally, other switch all is in off-state, then, control module control down(x) output becomes high level by low level, other each road control signal outputs remain unchanged, this moment, the Qx+1 of Mx became conducting by cut-off, and other switching tube still is in cut-off state, behind the Qx+1 saturation conduction, Rb (x) namely is connected in parallel with R2, resistance will diminish after the resistance parallel connection, therefore, make the dividing potential drop on the R2 diminish, like this, the voltage that sends back the FB pin of DC-DC power module also will reduce, and in case after detecting the VOUT_FB variation, the DC-DC controller namely starts corresponding control flow, the output voltage VO UT that improves DC-DC power module this moment arrives+X%, finishes the adjustment of a positive side-play amount of output voltage.
Through after the above-mentioned adjustment, if recover original output, need only disconnect Kx and get final product.
Above-described embodiment is the control flow of implementing the adjustment of output offset amount for one road DC-DC power module, if carry out the adjustment of output offset amount for multichannel DC-DC power module, only the up(x in each road adjusting module is controlled in the output of need control module simultaneously) and output down(x), adjust when just can realize multichannel output voltage side-play amount.For the most abominable operating position in the realistic application of situation that output voltage increases with the stepping skew or while stepping skew reduces, make circuit working the most badly use state in various combinations, be convenient to the engineer and find early to design hidden danger and circuit problem, thereby improve the stability of whole circuit, improved the reliability of circuit.
On the other hand, Kx can be the switching device of realizing in the electronics mode, also can be the switching device that mechanical system realizes, all can reach technique effect required for the present invention.
In sum, in the embodiment of the invention, in the DC-DC supply unit, set up a plurality of adjusting modules, an and control module, by the conducting state of switching tube up and down in the resistor matrix in this control module control adjusting module, to adjust the side-play amount of output voltage, thereby reach the purpose of control output voltage size, like this, the power operation that need not manually to unpack can be realized the synchronous adjustment of the output voltage of multichannel DC-DC power module, and need not to carry out in the situation that a large amount of circuit hardware adjustment changes, realized the output voltage of accurate adjustment DC-DC switch power module, thereby Effective Raise the testability of circuit, the operation fluency of integrated circuit testing process also provides very big convenience for product test and work for inspection.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment among the present invention and not break away from the spirit and scope of the present invention.Like this, if these in the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the embodiment among the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. DC-DC supply unit, comprise a plurality of DC-DC switch power modules, corresponding with each DC-DC switch power module many groups of the first feedback resistances and the second feedback resistance, described the first feedback resistance one end connects the power output end of DC-DC switch power module, the other end is by described the second feedback resistance ground connection, tie point between the first feedback resistance and the second feedback resistance connects the feedback voltage input of DC-DC switch power module, it is characterized in that, also comprises:
A plurality of adjusting modules, each adjusting module all links to each other with a DC-DC switch power module, and comprise at least one component piezoresistance, described at least one component piezoresistance comprises: the first divider resistance, the second divider resistance, the first switch and second switch, described the first divider resistance is in parallel with corresponding the first feedback resistance with the branch road after the first switch is connected, described the second divider resistance is in parallel with corresponding the second feedback resistance with the branch road after second switch is connected, and described the first switch and second switch are adjusted conducting state according to the signal of control end;
Control module, connect described the first switch and second switch by control end, be used for the default configuration parameter of basis from described control end output signal, control the conducting state of described the first switch and second switch, to adjust the side-play amount of described DC-DC switch power module output voltage.
2. DC-DC supply unit as claimed in claim 1 is characterized in that, described the first switch is triode or field effect transistor.
3. DC-DC supply unit as claimed in claim 2 is characterized in that, is connected the first current-limiting resistance between the base stage of described the first switch or grid and the described control module.
4. DC-DC supply unit as claimed in claim 1 is characterized in that, described second switch is triode or field effect transistor.
5. DC-DC supply unit as claimed in claim 4 is characterized in that, is connected the second current-limiting resistance between the base stage of described second switch or grid and the described control module.
6. such as each described DC-DC supply unit of claim 1-5, it is characterized in that, described control module comprises at least one switching device, and described control module is controlled the conducting state of described switching device according to default configuration parameter, with from described control end output signal.
7. DC-DC supply unit as claimed in claim 6 is characterized in that, described switching device is electronic type, perhaps mechanical type.
8. voltage adjusting method that is used for DC-DC supply unit as claimed in claim 1, it is characterized in that, described control module from described control end output signal, is controlled the conducting state of described the first switch and second switch according to default configuration parameter, comprising:
To described the first switch output low level, make this first switch conduction, to described second switch output low level, make this second switch cut-off, to reduce the side-play amount of described output voltage;
Perhaps
To described the first switch output high level, make this first switch cut-off, to described second switch output high level, make this second switch conducting, with the side-play amount of the described output voltage that raises.
9. method as claimed in claim 8 is characterized in that, described control module comprises at least one switching device, and described control module is controlled the conducting state of described switching device according to default configuration parameter, with from described control end output signal.
10. a network equipment is characterized in that, adopts such as each described DC-DC supply unit of claim 1-7.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150670Y (en) * | 1993-03-08 | 1993-12-22 | 毅威科技有限公司 | Portable DC mains |
| US6329727B1 (en) * | 2000-02-08 | 2001-12-11 | Adc Telecommunications, Inc. | Power supply controller |
| CN1908838A (en) * | 2005-08-05 | 2007-02-07 | 鸿富锦精密工业（深圳）有限公司 | Output adjustable voltage-stabilized source |
-
2009
- 2009-12-28 CN CN 200910265413 patent/CN101795071B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2150670Y (en) * | 1993-03-08 | 1993-12-22 | 毅威科技有限公司 | Portable DC mains |
| US6329727B1 (en) * | 2000-02-08 | 2001-12-11 | Adc Telecommunications, Inc. | Power supply controller |
| CN1908838A (en) * | 2005-08-05 | 2007-02-07 | 鸿富锦精密工业（深圳）有限公司 | Output adjustable voltage-stabilized source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101795071A (en) | 2010-08-04 |
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