CN205986623U - Adjustable reference source chip of switching power supply , numerical control voltage source and numerical control - Google Patents
Adjustable reference source chip of switching power supply , numerical control voltage source and numerical control Download PDFInfo
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Abstract
The utility model provides an adjustable reference source chip of switching power supply, numerical control voltage source and numerical control, includes: a numerical control voltage source control circuit and the digital controlled signal input port, a control signal output port, a sample voltage input port and the ground connection port that link to each other with this numerical control voltage source control circuit, wherein, this numerical control voltage source control circuit can generate a voltage source according to the data signal's of this digital controlled signal input port input requirement, with output voltage according to this sample voltage input port sampling back relatively, by this control signal output port output control signal. The utility model discloses can provide reliable and stable benchmark to easily and the communication protocol chip join in marriage and connect.
Description
Technical field
This utility model is related to benchmark source chip, more particularly, to a kind of benchmark source chip being applied to Switching Power Supply.
Background technology
After the QC3.0 of USB Type-C and Qualcomm fills standard issue soon, there is opening of output voltage handoff functionality
Close power supply application to be rapidly developed.According to its requirement, the 5V voltage of output acquiescence in upper electricity, when terminal connects and correct
After identification, further according to demanding terminal, output voltage can be adjusted, for example：Rise to highest 20V from 5V, such that it is able to transmit height
, to terminator, power supply still can be with the 5V equipment of compatibility standard simultaneously for the power reaching 100W.
Existing a kind of Switching Power Supply shown in Figure 1 and a reference source, when needing to export 14.5V, communication protocol chip
The port Ctrl1 output high level of U2, metal-oxide-semiconductor Q1 turns on, and resistance R5 is in parallel with resistance R4, changes sampling divider resistance resistance,
Output voltage is adjusted to 14.5V by voltage reference chip U1 of model TL431, this voltage is by opto-coupler chip U3, permissible
Feed back to the FB port of pwm chip U4 to control output voltage Vout.When needing to export 20V, communication protocol chip U2
Port Ctrl1 and port Ctrl2 export high level simultaneously, metal-oxide-semiconductor Q1 and metal-oxide-semiconductor Q2 are both turned on, resistance R6, resistance R5 with electricity
Resistance R4 is in parallel, changes sampling divider resistance resistance, by voltage reference chip U1 adjustment output voltage to 20V.This existing
There are some problems in a reference source：Peripheral components are more, increase output voltage values, just correspondingly need to increase a metal-oxide-semiconductor
And control resistance accordingly, also correspondingly need to increase the control port of a communication protocol chip U2 come to control newly-increased should
Metal-oxide-semiconductor；And, because output voltage values are to determine by the resistance size controlling resistance with the drain series of newly-increased metal-oxide-semiconductor
Fixed, therefore after circuit configuration is well, if desired for change output voltage values it is necessary to simultaneously change communication protocol chip U2 software and
The resistance controlling resistance just enables.
Existing another kind Switching Power Supply shown in Figure 2 and a reference source, have been internally integrated one in communication protocol chip U2
Individual pull-down current source, it is often to be walked with 2uA by the port CTRL1 of communication protocol chip U2, by controlling model TL431
The FB port of voltage reference chip U1 is controlling output voltage Vout.There are some problems in this reference source：Use for usual
For being used as the Single Chip Microcomputer (SCM) system of interface protocol processing unit, it is extremely difficult for will producing the current source that accurate 2uA often walks
Thing it is impossible to be directly controlled using general single chip circuit；In addition, for the electric current of 2uA, easily because cloth
Line is bad or connects distance factor and is subject to external signal to disturb.
It can be seen that, when design can be increased to the power-supply system of 20V from 5V, based on existing three end adjustable shunt sources, for example：
TL431 type voltage reference, TSM1052 type voltage x current benchmark, a reference source realized, there is a problem of a lot, to such as handss
The intelligent terminal of machine etc carries out the obstacle that digital control brings essence, is necessary in fact to improve.
Utility model content
The technical problems to be solved in the utility model is to overcome the shortcomings of that above-mentioned prior art exists, and proposes a kind of number
Control adjustable reference source chip, using the teaching of the invention it is possible to provide reliable and stable benchmark, and be easy to connect with communication protocol chip.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes includes, and proposes a kind of numerical control adjustable reference source
Chip, including：One digital voltage power control circuit and the digital controlled signal being connected with this digital voltage power control circuit are defeated
Inbound port, a control signal output port, a sampled voltage input port and grounding ports；Wherein, this digital voltage power
Control circuit can generate a voltage source, with root according to the requirement of the digital signal of this digital controlled signal input port input
According to this sampled voltage input port sampling output voltage signal relatively after, by this control signal output port output one control letter
Number.
In certain embodiments, this digital voltage power control circuit includes：One serial ports processes logical block, for from this number
Word control signal input port inputs control signal, generates a switch controlling signal；One selecting switch and resistor network unit, bag
Include multiple selecting switch and the resistor network being connected with these selecting switch, these selecting switch are controlled by this on-off control letter
Number, this voltage source is provided；One reference level unit, provides a reference level for this resistor network；And a comparing unit, it is used for
This voltage source is compared with this output voltage signal, result of the comparison exports as this control signal.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes also includes, and proposes a kind of Switching Power Supply, bag
Include：One communication protocol chip, is controlled by a pwm chip of this communication protocol chip via an opto-coupler chip, and setting
Numerical control adjustable reference source chip between this communication protocol chip and this opto-coupler chip, as above, wherein, this numeral is controlled
Signal input port processed is connected with an output port of this communication protocol chip, this control signal output port and this opto-coupler chip
It is connected, this sampled voltage input port is connected with the output voltage of this Switching Power Supply.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes also includes, and proposes a kind of digital voltage power,
Including：Numerical control adjustable reference source chip as above, wherein, goes here and there between this control signal output port and a supply power supply and sets
One first resistor, between this sampled voltage input port and this control signal output port, string sets a second resistance.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes also includes, and proposes a kind of numerical control adjustable reference
Source chip, including：One digital voltage power control circuit, an output current detection circuit, with this digital voltage power control circuit phase
A digital controlled signal input port even, a control signal output port, a sampled voltage input port and an earth terminal
Mouthful, and the sample rate current input port being connected with this output current detection circuit；Wherein, this digital voltage power control circuit
A voltage source can be generated, and according to this sampling according to the requirement of the digital signal of this digital controlled signal input port input
Control source port sampling output voltage signal relatively after, by this control signal output port output one constant voltage control letter
Number；This output current detection circuit can generate according to the requirement of the digital signal of this digital controlled signal input port input
Another voltage source, after being compared according to the output current signal that this sample rate current input port is sampled, defeated by this control signal
Exit port exports a constant current controlling signal.
In certain embodiments, this digital voltage power control circuit includes：One serial ports processes logical block, for from this number
Word control signal input port inputs control signal, generates a switch controlling signal；One first choice switch and resistor network list
Unit, the resistor network be connected including multiple selecting switch and with these selecting switch, these selecting switch are controlled by this switch control
Signal processed, provides this voltage source；One first reference level unit, provides one first reference level for this resistor network；And one
First comparing unit, for comparing this voltage source with the output voltage signal of this sampling, result of the comparison is as constant voltage control
Signal output processed.
In certain embodiments, this output current detection circuit includes：One second selecting switch and resistor network unit, bag
Include multiple selecting switch and the resistor network being connected with these selecting switch, these selecting switch are controlled by this on-off control letter
Number, this another voltage source is provided；One second reference level unit, provides one second reference level for this resistor network；And one
Second comparing unit, for comparing this another voltage source with the output current signal of this sampling, result of the comparison is as permanent electricity
Flow control signals export.
In certain embodiments, also include：It is arranged between this first comparing unit and this control signal output port
One first isolated location, and one second isolation being arranged between this second comparing unit and this control signal output port is single
Unit, so that the output of this constant voltage control signal will not produce each other with this constant current controlling signal output and conflict.
In certain embodiments, this first isolated location/the second isolated location selects isolating diode, this isolating diode
Positive pole be connected with this control signal output port, negative pole is connected with the outfan of this first comparing unit/the second comparing unit.
The technical scheme that this utility model is directed to above-mentioned technical problem and proposes also includes, and proposes a kind of Switching Power Supply, bag
Include：One communication protocol chip, is controlled by a pwm chip of this communication protocol chip via an opto-coupler chip, and setting
Numerical control adjustable reference source chip between this communication protocol chip and this opto-coupler chip, as above, wherein, this numeral is controlled
Signal input port processed is connected with an output port of this communication protocol chip, this control signal output port and this opto-coupler chip
It is connected, this sampled voltage input port is connected with the output voltage of this Switching Power Supply, this sample rate current input port and this switch
The output current of power supply is connected.
Compared with prior art, this utility model is inputted from communication protocol chip by digital controlled signal input port
Digital signal, correspondingly produces a voltage source in chip internal, defeated with the Switching Power Supply of sampled voltage input port offer
Go out voltage to be compared, to control pwm chip via opto-coupler chip, thus can instruct to realize with supplied with digital signal
The different magnitude of voltage of Switching Power Supply output；In addition, the control signal on digital controlled signal input port adopts data serial to instruct,
Significantly enhance the anti-interference of sampling feedback circuit；And it is only necessary to a common digital I/O port output is required
Serial command just can realize different voltage outputs.
Brief description
Fig. 1 is the electrical schematic diagram of a kind of existing Switching Power Supply and a reference source.
Fig. 2 is the electrical schematic diagram of existing another kind Switching Power Supply and a reference source.
Fig. 3 is Switching Power Supply of the present utility model and the electrical schematic diagram of numerical control adjustable reference source chip first embodiment.
Fig. 4 is the detailed electrical schematic diagram of numerical control adjustable reference source chip first embodiment of the present utility model.
Fig. 5 is a kind of application of numerical control adjustable reference source chip first embodiment of the present utility model.
Fig. 6 is Switching Power Supply of the present utility model and the electrical schematic diagram of numerical control adjustable reference source chip second embodiment.
Fig. 7 is the detailed electrical schematic diagram of numerical control adjustable reference source chip second embodiment of the present utility model.
Specific embodiment
Below in conjunction with accompanying drawing, this utility model is given with further elaboration.
Referring to Fig. 3, Fig. 3 is that the electricity of Switching Power Supply of the present utility model and numerical control adjustable reference source chip first embodiment is former
Reason figure.The utility model proposes a kind of Switching Power Supply, it includes：Numerical control adjustable reference source chip U1, communication protocol chip U2, light
Coupling chip U3 and pwm chip U4.
A numerical control voltage control circuit 31 is included inside numerical control adjustable reference source chip U1.This numerical control adjustable reference source
Chip U1 is provided with the digital controlled signal input port Ki being connected with this digital voltage power control circuit 31, control signal outfan
Mouth Ko, sampled voltage input port Vi and grounding ports Gnd.Wherein, this digital voltage power control circuit 31 can be according to port
The requirement of the digital signal of Ki input, generates a voltage source, after being compared according to the output voltage signal that port Vi samples, by
Port Ko exports a control signal, to control pwm chip U4 via opto-coupler chip U3.Thus can be according to from communication protocols
The digital signal instruction of view chip U2 input, to realize the different magnitude of voltage of power supply output.Because control signal is to adopt numeric string
Row instruction, can greatly strengthen the anti-interference of the feedback circuit of sampling pwm chip U4.In addition, for communication protocol core
It is only necessary to utilize a common digital I/O output port it is possible to export required serial command information for piece U2,
To realize the output of different voltages, from the less-restrictive suffered by communication protocol chip U2.
Referring to Fig. 4, Fig. 4 is the detailed electrical schematic diagram of numerical control adjustable reference source chip first embodiment of the present utility model.
In conjunction with Fig. 3, above-mentioned numerical control adjustable reference source chip U1 specifically includes：Serial ports processes logical block 41, can be defeated from port Ki
Enter control signal, then generate switch controlling signal；Selecting switch and resistor network unit 42, including some selecting switch and with
The resistor network that these selecting switch are connected, these selecting switch are controlled by this switch controlling signal, provide a voltage source；Ginseng
Examine level-cell 43, provide reference level for this resistor network；And comparing unit 44, by this voltage source and port Vi offer
Output voltage Vout signal is compared, and result of the comparison exports from port Ko as control signal.It is understood that this string
Before mouth processes logical block 41, selecting switch and resistor network unit 42, reference level unit 43 and comparing unit 44 composition
The digital voltage power control circuit 31 stated.
For example, the control serial data of this numerical control adjustable reference source chip U1 comprises " packet header sign+data field+school
Test code+bag tail tag to show ".Chip U1 after receiving packet and confirming as effective data packets, the instruction that is given according to data field
Reference voltage needed for exporting one to this comparing unit 44, after comparing with sampled signal, controllable pwm chip U4 output
The output voltage needing；Such as no new packet or receive invalid packet, then maintain standing state, new until receiving
Effective instruction.
It is noted that in the present embodiment, this digital voltage power control circuit 31 can be according to the number of port Ki input
The requirement of word signal forms a voltage source together with pwm chip U4；In other embodiments, this digital voltage power controls
Circuit 31 can also be can to form a perseverance together with pwm chip U4 according to the requirement of the digital signal of port Ki input
Stream source.
Compared with prior art, this numerical control adjustable reference source chip U1 structure, can be according to port Ki from communication protocol
The requirement of the digital signal of chip U2 input, produces a voltage source in chip internal, the Switching Power Supply providing with port Vi
Output voltage signal is compared, and to control pwm chip U4 via opto-coupler chip U3, thus can be with supplied with digital signal
Instruct and to realize the different magnitudes of voltage of Switching Power Supply output；In addition, the control signal on the Ki of port adopts data serial to instruct, greatly
Enhance the anti-interference of sampling feedback circuit；And it is only necessary to the required string of a common digital I/O port output
Row instruction just can realize different voltage outputs it will be understood that the selection aspect of communication protocol chip U2, and what does not almost have
Limit.
Referring to Fig. 5, Fig. 5 is a kind of application of numerical control adjustable reference source chip first embodiment of the present utility model.This number
The application of control adjustable reference source chip U1 is not limited to Switching Power Supply.Peripheral components only need to two resistance R1, R2, concrete and
Speech, between the port Ko of this numerical control adjustable reference source chip U1 and supply power Vcc, string sets first resistor R1, and this numerical control is adjustable
Between the port Vi of benchmark source chip U1 and port Ko, string sets second resistance R2 it is possible to realize accurate digital voltage power, can
Conveniently realize the control to simulation signal for the digital signal.
Referring to Fig. 6, Fig. 6 is that the electricity of Switching Power Supply of the present utility model and numerical control adjustable reference source chip second embodiment is former
Reason figure.This numerical control adjustable reference source chip U1 is mainly reflected in the difference of aforementioned first embodiment：Internal circuit is except numerical control
Outside voltage control circuit 61, increased an output current detection circuit 62.One is correspondingly increased in terms of port
Sample rate current input port Ii, this output current detection circuit 62 can find out the magnitude of voltage on current sense resistor Ris, thus
Obtain the size of output current I, after output current sampled signal is compared with the reference voltage within chip U1, via opto-coupler chip
U3, to control pwm chip U4, thus can realize power supply according to the digital signal instruction from communication protocol chip U2
The different current value of output.It is understood that this numerical control adjustable reference source chip U1 match with this pwm chip U4 can structure
Become the Switching Power Supply of constant voltage output/constant current output.
Referring to Fig. 7, Fig. 7 is the detailed electrical schematic diagram of numerical control adjustable reference source chip second embodiment of the present utility model.
In conjunction with Fig. 6, above-mentioned numerical control adjustable reference source chip U1 specifically includes：Serial ports processes logical block 71, can be defeated from port Ki
Enter control signal, then generate switch controlling signal；First choice switch and resistor network unit 72, including some selecting switch
And the resistor network being connected with these selecting switch, these selecting switch are controlled by this switch controlling signal, provide a voltage
Source；First reference level unit 73, provides reference level for this first resistor network；First comparing unit 74 and the first isolation
Unit 75, the output voltage Vout signal that this voltage source is provided with port Vi is compared, and result of the comparison is as constant voltage
Control signal can export from port Ko；Second selecting switch and resistor network unit 76, including some selecting switch and and these
The resistor network that selecting switch is connected, these selecting switch are controlled by this switch controlling signal, provide another voltage source；Second
Reference level unit 77, provides reference level for this second resistance network；Second comparing unit 78 and the second isolated location 79,
The output current sampled signal that this another voltage source is provided with port Ii（Namely the output current signal of sampling）It is compared,
Result of the comparison can export from port Ko as constant current controlling signal.It is understood that this serial ports process logical block 71,
First choice switch and resistor network unit 72, the first reference level unit 73 and the first comparing unit 74 constitute aforesaid number
Control voltage control circuit 61；This second selecting switch and resistor network unit 76, the second reference level unit 77 and second
Comparing unit 78 constitutes aforesaid output current detection circuit 62.
It is noted that arrange this two isolated location 75,79 can realize between two comparing units 74,78 every
From that is to say, that in power supply output pressure constant state, the comparing unit 78 of control electric current exports high level, has isolated location 79
Effect, would not on constant voltage control signal produce impact；Similarly, in power supply output constant current state, control voltage
Comparing unit 74 exports high level, plays the role of isolated location 75, would not produce impact to constant current controlling signal.In this reality
Apply in example, isolated location 75,79 selects diode to realize, comparing unit 74,78 selects operational amplifier to realize.
Compared with prior art, this numerical control adjustable reference source chip U1 structure, can be according to port Ki from communication protocol
The requirement of the digital signal of chip U2 input, produces two voltage sources in chip internal, respectively with the switch providing with port Vi
The output current sampled signal of the Switching Power Supply of the output voltage signal of power supply and port Ii offer is compared, via optocoupler
Chip U3, to control pwm chip U4, thus can instruct to realize the different electricity of Switching Power Supply output with supplied with digital signal
Pressure value/current value；In addition, the control signal on the Ki of port adopts data serial to instruct, significantly enhance sampling feedback circuit
Anti-interference；And it is only necessary to a required serial command of common digital I/O port output just can realize difference
Voltage output it will be understood that the selection aspect of communication protocol chip U2, almost do not have anything to limit.
The above, preferred embodiment only of the present utility model, it is not intended to limit embodiment of the present utility model,
Those of ordinary skill in the art, according to central scope of the present utility model and spirit, can very easily carry out corresponding accommodation
Or modification, therefore protection domain of the present utility model should the protection domain required by by claims be defined.
Claims (10)
1. a kind of numerical control adjustable reference source chip is it is characterised in that include：One digital voltage power control circuit and with this numerical control electricity
The connected digital controlled signal input port of potential source control circuit, a control signal output port, a sampled voltage input
Mouth and grounding ports；Wherein, this digital voltage power control circuit can input according to this digital controlled signal input port
Digital signal requirement, generate a voltage source, compare with according to the output voltage signal that this sampled voltage input port is sampled
Afterwards, a control signal is exported by this control signal output port.
2. according to the numerical control adjustable reference source chip described in claim 1 it is characterised in that this digital voltage power control circuit bag
Include：One serial ports processes logical block, for inputting control signal from this digital controlled signal input port, generates an on-off control
Signal；One selecting switch and resistor network unit, the resistor network be connected including multiple selecting switch and with these selecting switch,
These selecting switch are controlled by this switch controlling signal, provide this voltage source；One reference level unit, provides for this resistor network
One reference level；And a comparing unit, for this voltage source is compared with the output voltage signal of this sampling, result of the comparison
As the output of this control signal.
3. a kind of Switching Power Supply is it is characterised in that include：One communication protocol chip, is controlled by this communication via an opto-coupler chip
One pwm chip of protocol chip, and it is arranged between this communication protocol chip and this opto-coupler chip, such as claim
Numerical control adjustable reference source chip described in 1 or 2；Wherein, this digital controlled signal input port and the one of this communication protocol chip
Output port is connected, and this control signal output port is connected with this opto-coupler chip, and this sampled voltage input port is electric with this switch
The output voltage in source is connected.
4. a kind of digital voltage power is it is characterised in that include：Numerical control adjustable reference source chip as claimed in claim 1 or 2,
Wherein, this control signal output port and one supply power supply between string set a first resistor, this sampled voltage input port with should
Between control signal output port, string sets a second resistance.
5. a kind of numerical control adjustable reference source chip is it is characterised in that include：One digital voltage power control circuit, an output current
Testing circuit, the digital controlled signal input port being connected with this digital voltage power control circuit, a control signal outfan
Mouth, a sampled voltage input port and grounding ports, and the sample rate current being connected with this output current detection circuit
Input port；Wherein, this digital voltage power control circuit can be according to the numeral letter of this digital controlled signal input port input
Number requirement, generate a voltage source, after being compared according to the output voltage signal that this sampled voltage input port is sampled, by this control
Signal output port processed exports a constant voltage control signal；This output current detection circuit can be defeated according to this digital controlled signal
The requirement of the digital signal of inbound port input, generates another voltage source, defeated with sampled according to this sample rate current input port
Go out current signal relatively after, by this control signal output port export a constant current controlling signal.
6. according to the numerical control adjustable reference source chip described in claim 5 it is characterised in that this digital voltage power control circuit bag
Include：One serial ports processes logical block, for inputting control signal from this digital controlled signal input port, generates an on-off control
Signal；One first choice switch and resistor network unit, the resistance be connected including multiple selecting switch and with these selecting switch
Network, these selecting switch are controlled by this switch controlling signal, provide this voltage source；One first reference level unit, for this electricity
Resistance network provides one first reference level；And one first comparing unit, for by the output voltage of this voltage source and this sampling
Signal compares, and result of the comparison exports as constant voltage control signal.
7. according to the numerical control adjustable reference source chip described in claim 6 it is characterised in that this output current detection circuit bag
Include：One second selecting switch and resistor network unit, the resistance net be connected including multiple selecting switch and with these selecting switch
Network, these selecting switch are controlled by this switch controlling signal, provide this another voltage source；One second reference level unit, for this
Resistor network provides one second reference level；And one second comparing unit, for this another voltage source and this sampling is defeated
Go out current signal to compare, result of the comparison is as constant current controlling signal output.
8. according to the numerical control adjustable reference source chip described in claim 7 it is characterised in that also including：It is arranged on this first ratio
One first isolated location relatively between unit and this control signal output port, and it is arranged on this second comparing unit and this control
One second isolated location between signal output port, so that the output of this constant voltage control signal is defeated with this constant current controlling signal
Go out and will not produce conflict each other.
9. according to the numerical control adjustable reference source chip described in claim 8 it is characterised in that this first isolated location/the second every
Select isolating diode from unit, the positive pole of this isolating diode is connected with this control signal output port, negative pole and this first
The outfan of comparing unit/the second comparing unit is connected.
10. a kind of Switching Power Supply is it is characterised in that include：One communication protocol chip, is controlled by this communication via an opto-coupler chip
One pwm chip of protocol chip, and it is arranged between this communication protocol chip and this opto-coupler chip, such as claim
Numerical control adjustable reference source chip described in 5 to 9 any one；Wherein, this digital controlled signal input port and this communication protocol core
Piece one output port be connected, this control signal output port is connected with this opto-coupler chip, this sampled voltage input port with this
The output voltage of Switching Power Supply is connected, and this sample rate current input port is connected with the output current of this Switching Power Supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047360.8U CN205986623U (en) | 2016-09-09 | 2016-09-09 | Adjustable reference source chip of switching power supply , numerical control voltage source and numerical control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621047360.8U CN205986623U (en) | 2016-09-09 | 2016-09-09 | Adjustable reference source chip of switching power supply , numerical control voltage source and numerical control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205986623U true CN205986623U (en) | 2017-02-22 |
Family
ID=58040544
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621047360.8U Withdrawn - After Issue CN205986623U (en) | 2016-09-09 | 2016-09-09 | Adjustable reference source chip of switching power supply , numerical control voltage source and numerical control |
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| Country | Link |
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| CN (1) | CN205986623U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809175A (en) * | 2016-09-09 | 2018-03-16 | 苏州力生美半导体有限公司 | Switching Power Supply, digital voltage power and numerical control adjustable reference source chip |
-
2016
- 2016-09-09 CN CN201621047360.8U patent/CN205986623U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107809175A (en) * | 2016-09-09 | 2018-03-16 | 苏州力生美半导体有限公司 | Switching Power Supply, digital voltage power and numerical control adjustable reference source chip |
| CN107809175B (en) * | 2016-09-09 | 2024-01-30 | 苏州力生美半导体有限公司 | Switching power supply, numerical control voltage source and numerical control adjustable reference source chip |
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