CN205375257U - Power supply module - Google Patents
Power supply module Download PDFInfo
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- CN205375257U CN205375257U CN201620067737.XU CN201620067737U CN205375257U CN 205375257 U CN205375257 U CN 205375257U CN 201620067737 U CN201620067737 U CN 201620067737U CN 205375257 U CN205375257 U CN 205375257U
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- output voltage
- feedback network
- divider resistance
- voltage feedback
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Abstract
The utility model relates to a power supply module with the voltage output end is just including power IC and output voltage feedback network, voltage output end electricity is connected power IC's output passes through output voltage feedback network electricity is connected power IC's feedback end, thereby the output voltage feedback network is right the output voltage of voltage output end carries out the partial pressure value conduct after the partial pressure the input of feedback end. Additionally, the output voltage feedback network comprises just a plurality of discrete components that contain active device and passive component the divider resistance value of output voltage feedback network is variable. Therefore, the utility model discloses can realize power supply module's the multistage regulation of output voltage, just have low the reaching of implementation cost and implement advantages such as stable.
Description
Technical field
This utility model relates to technical field of power management, particularly relates to a kind of power module.
Background technology
In existing electronic product circuit, the supply voltage of each chip modular converter (abbreviation power module) of powering generally has both of which, and one is fixed voltage, and this mode processes fairly simple, and shortcoming is that voltage is fixing cannot be changed；Another kind is dynamic adjustment, it is do dynamic adjustment by each functional chip in conjunction with rear end equipment cooperation to process mostly, shortcoming is implemented as this and requires with technology higher, and is usually and presets range of accommodation by Chip scale requirement content, therefore range of application requires higher with technology.
Utility model content
In view of this, for overcoming the defect and deficiency that prior art exists, the utility model proposes a kind of power module and output voltage adjusting method thereof.
Specifically, a kind of power module that this utility model embodiment proposes, there is voltage output end and include power supply IC and output voltage feedback network, described voltage output end electrically connects the outfan of described power supply IC and by the feedback end of the described output voltage feedback network described power supply IC of electrical connection, thus the output voltage of described voltage output end is carried out the input as described feedback end of the partial pressure value after dividing potential drop by described output voltage feedback network.Furthermore, described output voltage feedback network is made up of the multiple discrete components comprising active device and passive device and the divider resistance value of described output voltage feedback network is variable.
More specifically, the first divider resistance that described output voltage feedback network includes being serially connected between described output voltage terminal and earthing potential and the second divider resistance and multiple divider resistance value regulon being connected in parallel between described node and described earthing potential, each described divider resistance value regulon includes being serially connected in the fixed value resistance between described node and described earthing potential and nmos fet, thus the divider resistance value of described output voltage feedback network can be made variable by controlling the on off state of described nmos fet.
From the foregoing, it will be observed that this utility model embodiment is by being designed output voltage feedback network so that it is divider resistance value controllable variable, such that it is able to change the input partial pressure value of the feedback end of power supply IC, and then the multistage adjustment of the output voltage of power module can be realized.
By the detailed description below with reference to accompanying drawing, other side of the present utility model and feature become apparent upon.It is understood that this accompanying drawing is only the purpose design of explanation, not as the restriction of scope of the present utility model.It should also be noted that unless otherwise noted, it is not necessary to scale accompanying drawing, they only try hard to structure described herein and flow process are described conceptually.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.
Fig. 1 is the circuit diagram of a kind of power module of this utility model embodiment.
Detailed description of the invention
Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.
Referring to Fig. 1, a kind of power module that this utility model embodiment proposes include power supply IC such as RT8120 chip (but this utility model is not limited thereto) and output voltage feedback network (as Fig. 1 broken box indicate).Power supply IC has the PHASE pin of outfan such as RT8120 chip and the FB pin of feedback end such as RT8120 chip；The outfan of the voltage output end Vout electric connection of power supply IC of power module by the feedback end of output voltage feedback network electric connection of power supply IC；Certainly, power supply IC also has other pins such as power pins VCC and grounding pin GND etc. and also can be configured with the component such as passive device of other necessity as electric capacity, resistance etc. and active device as NMOS etc., these are all within the scope of the understanding of those skilled in the art, therefore no longer describe in detail.
Holding above-mentioned, output voltage feedback network includes being serially connected in voltage output end Vout and reference potential such as divider resistance PR1 between earthing potential and divider resistance PR2 and the feedback end of the node N electric connection of power supply IC between divider resistance PR1 and divider resistance PR2.nullIn addition，Output voltage feedback network also includes at least one and is connected electrically in node N and reference potential such as divider resistance value regulon between earthing potential，Three (but this utility model is not limited thereto) shown in Fig. 1 is connected in parallel on the divider resistance value regulon between node N and earthing potential，Wherein，First divider resistance value regulon includes the divider resistance PR3 (passive device) and the nmos fet Q1 (active device) that are serially connected between node N and earthing potential，Nmos fet Q1 is as a kind of trigistor，Its first end electrical connection earthing potential、Its second end electrically connects node N by divider resistance PR3 and it controls end electrical connection controller such as single-chip microcomputer (or other controllers such as arm processor，Simply cost is more of a relatively high) GPIO1 mouth and preferably also electrical connection ground capacity C1；Similarly, second divider resistance value regulon includes the divider resistance PR4 (passive device) and the nmos fet Q2 (active device) that are serially connected between node N and earthing potential, nmos fet Q2 is as a kind of trigistor, and its first end electrically connects earthing potential, its second end and electrically connects the GPIO2 mouth of node N and its control end electrical connection controller such as single-chip microcomputer by divider resistance PR4 and preferably also electrically connect ground capacity C2；3rd divider resistance value regulon includes the divider resistance PR5 (passive device) and the nmos fet Q3 (active device) that are serially connected between node N and earthing potential, nmos fet Q3 is as a kind of trigistor, and its first end electrically connects earthing potential, its second end and electrically connects the GPIO3 mouth of node N and its control end electrical connection controller such as single-chip microcomputer by divider resistance PR5 and preferably also electrically connect ground capacity C3.Furthermore, the resistance of divider resistance PR3, PR4, PR5 is preferably different.
Thus, in FIG, the partial pressure value input as the feedback end of power supply IC at node N place is obtained owing to the output voltage of the voltage output end Vout of power module can be carried out dividing potential drop by output voltage feedback network, therefore by the GPIO1 mouth of single-chip microcomputer, GPIO2 mouth and GPIO3 mouth are to each nmos fet Q1, Q2 and Q3 input logic " 0 " or logical one signal are to control each nmos fet Q1, Q2 and Q3 is on or cut-off state (namely open state or off status), the resistance value of output voltage feedback network can be done and correspondingly change, and then the partial pressure value at node N place is changed；Power supply IC detects that the output voltage values of the output voltage terminal Vout of power module can be adjusted after changing by the input of its feedback end, and then reaches to regulate the purpose of the output voltage of power module.
In brief, in FIG, this utility model embodiment is the Intelligent adjustment of the output voltage being implemented power module by GPIO, it regulates by the divider resistance value of the output voltage feedback network of power module is done change, feedback signal value and actual output voltage value is made to have deviation, make it change to realize for the purpose of output voltage by " deception " power supply IC, and export regulated value and determine according to the GPIO mouth quantity added, one GPIO mouth can set that logical zero and logical one two states, therefore add a GPIO mouth and just can realize 2 step voltages adjustments, 2 GPIO mouths can realize 4 step voltages and regulate, 3 GPIO mouths just can realize totally 8 step voltages and regulate, by that analogy.For 3 shown in Fig. 1 GPIO mouth, if the resistance of divider resistance PR1, PR2, PR3, PR4 and PR5 respectively 2K, 1.8K, 24K, 12K and 6.04K, then the input state of GPIO mouth and the relation of the output voltage of power module are such as shown in following table:
| The input of GPIO1 | The input of GPIO2 | The input of GPIO3 | Output voltage values |
| 1 | 1 | 1 | 1.615 |
| 1 | 1 | 0 | 1.565 |
| 1 | 0 | 1 | 1.515 |
| 1 | 0 | 0 | 1.465 |
| 0 | 1 | 1 | 1.417 |
| 0 | 1 | 0 | 1.367 |
| 0 | 0 | 1 | 1.317 |
| 0 | 0 | 0 | 1.267 |
In sum, this utility model embodiment reaches the change of partial pressure value by controlling the divider resistance value of output voltage feedback network and then makes the output voltage of power module make adjustment, and being made up of the multiple discrete components comprising active device such as MOS field-effect transistor and passive device such as fixed value resistance owing to output voltage feedback network is preferably, therefore implementation cost is low, it is stable to implement and feasibility is high.
The above, it it is only preferred embodiment of the present utility model, not this utility model is done any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but it is not limited to this utility model, any those skilled in the art, without departing within the scope of technical solutions of the utility model, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solutions of the utility model content, any simple modification above example made according to technical spirit of the present utility model, equivalent variations and modification, all still fall within the scope of technical solutions of the utility model.
Claims (6)
1. a power module, there is voltage output end and include power supply IC and output voltage feedback network, described voltage output end electrically connects the outfan of described power supply IC and by the feedback end of the described output voltage feedback network described power supply IC of electrical connection, thus the output voltage of described voltage output end is carried out the input as described feedback end of the partial pressure value after dividing potential drop by described output voltage feedback network；It is characterized in that, described output voltage feedback network is made up of the multiple discrete components comprising active device and passive device and the divider resistance value of described output voltage feedback network is variable.
2. power module as claimed in claim 1, it is characterized in that, the first divider resistance that described output voltage feedback network includes being serially connected between described output voltage terminal and earthing potential and the second divider resistance and multiple divider resistance value regulon being connected in parallel between described node and described earthing potential, each described divider resistance value regulon includes being serially connected in the fixed value resistance between described node and described earthing potential and nmos fet, thus the divider resistance value of described output voltage feedback network can be made variable by controlling the on off state of described nmos fet.
3. power module as claimed in claim 2, it is characterised in that also include controller, described controller has multiple GPIO mouth, and the plurality of GPIO mouth is electrically connected the control end of described nmos fet of the plurality of divider resistance value regulon.
4. power module as claimed in claim 3, it is characterised in that described controller is single-chip microcomputer.
5. power module as claimed in claim 3, it is characterised in that the described control end of described nmos fet is electrically connected with ground capacity.
6. power module as claimed in claim 2, it is characterised in that the resistance of the described fixed value resistance in the plurality of divider resistance value regulon is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067737.XU CN205375257U (en) | 2016-01-22 | 2016-01-22 | Power supply module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620067737.XU CN205375257U (en) | 2016-01-22 | 2016-01-22 | Power supply module |
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| Publication Number | Publication Date |
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| CN205375257U true CN205375257U (en) | 2016-07-06 |
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| CN201620067737.XU Active CN205375257U (en) | 2016-01-22 | 2016-01-22 | Power supply module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110622096A (en) * | 2017-06-23 | 2019-12-27 | 日立汽车系统株式会社 | Electronic control device |
| CN111031642A (en) * | 2019-10-31 | 2020-04-17 | 惠州市德赛西威汽车电子股份有限公司 | Control circuit and control system for adjusting angle of car lamp |
-
2016
- 2016-01-22 CN CN201620067737.XU patent/CN205375257U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110622096A (en) * | 2017-06-23 | 2019-12-27 | 日立汽车系统株式会社 | Electronic control device |
| CN111031642A (en) * | 2019-10-31 | 2020-04-17 | 惠州市德赛西威汽车电子股份有限公司 | Control circuit and control system for adjusting angle of car lamp |
| CN111031642B (en) * | 2019-10-31 | 2022-10-14 | 惠州市德赛西威汽车电子股份有限公司 | Control circuit and control system for adjusting angle of car lamp |
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