CN107634650A - Circuit for generating constant voltage and chip on piece - Google Patents
Circuit for generating constant voltage and chip on piece Download PDFInfo
- Publication number
- CN107634650A CN107634650A CN201710945210.1A CN201710945210A CN107634650A CN 107634650 A CN107634650 A CN 107634650A CN 201710945210 A CN201710945210 A CN 201710945210A CN 107634650 A CN107634650 A CN 107634650A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- input
- current control
- output end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 230000006837 decompression Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000007600 charging Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000009123 feedback regulation Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The present invention provides circuit for generating constant voltage and chip on a kind of piece, and circuit for generating constant voltage includes reduction voltage circuit, current control circuit, voltage sampling circuit, feedback circuit wherein on piece；The reduction voltage circuit input is connected with the outer input voltage of piece, reduction voltage circuit output end is connected with current control circuit input, the current control circuit output end is connected with constant pressure output end, current control circuit output end is also connected with sample circuit input, the sample circuit output end is connected with feedback circuit input, first control terminal of the feedback circuit is connected with reduction voltage circuit control terminal, and the second control terminal of the feedback circuit is connected with current control circuit control terminal.Solves the problem of a kind of existing chip internal voltage generation is not accurate enough, and exterior power supply plant energy consumption is too high.
Description
Technical field
The present invention relates to power circuit design field, more particularly to one kind with high input voltage, can change the piece of stable output
Upper circuit for generating constant voltage.
Background technology
In microelectronic, consumer electronics market emerges substantial amounts of facility, and light and thin type, the mobile electron of low-power consumption are set
It is standby, improve the life of people.These consumer mobile electronic devices have also driven the development of power management IC, to power management
IC proposes higher index request.
In field of switch power, input AC electricity 85Vac~265Vac is, it is necessary to be direct current by the AC rectification, and turn
Turn to the low-voltage that chip can be born and to chip power supply.Prior art is generally starts resistance by the high pressure connection after rectification
With start-up capacitance to ground, electric capacity one end is connected to chip power input, while be connected to by assists winding and diode
Power input, to chip power supply.
Some existing technologies are filtered with C1, direct current Ui are converted into, by opening as shown in figure 1, VAC passes through D1 rectifications
Dynamic resistance R1, wherein start-up capacitance C3, R1, C3 shared one end, are connected to the VCC ends of chip, are provided for chip and start voltage
And operating current, while assists winding Na and diode D2 are to chip power supply.
The problem of this system design, is that system peripherals circuit needs to start resistance R1, start-up capacitance C3, assists winding
Na, diode D2, this method need more devices and add process in making, and increase system cost；
Extra device increases system schema area, is increasingly emphasizing today of miniaturization portability, system schema
It is the smaller the better；Because system peripherals need device, these devices such as startup resistance, start-up capacitance, assists winding and diode same
When consume more power consumptions, with the appearance of the mandatory efficiency specification such as energy-conservation, green, power supply adaptor must improve efficiency,
Stand-by power consumption is reduced, it is necessary to which a kind of new on-chip circuit design solves this problem.
The content of the invention
The technical problem to be solved in the present invention, it is to provide circuit for generating constant voltage on a kind of new piece, solves existing
The external high pressure of technology chips internal circuit, precisely the problem of generation low pressure.
What the present invention was realized in：Circuit for generating constant voltage on a kind of piece, including reduction voltage circuit, current control electricity
Road, voltage sampling circuit, feedback circuit；
The reduction voltage circuit input is connected with the outer input voltage of piece, and reduction voltage circuit output end inputs with current control circuit
End connection, the current control circuit output end is connected with constant pressure output end, current control circuit output end also with sample circuit
Input connects, and the sample circuit output end is connected with feedback circuit input, the first control terminal of the feedback circuit and
Reduction voltage circuit control terminal is connected, and the second control terminal of the feedback circuit is connected with current control circuit control terminal；
The reduction voltage circuit is used to input voltage outside piece being converted to low pressure output, and the current control circuit is used for will be low
Pressure output is converted to constant pressure output；The sample circuit is used to gather constant pressure output equivalent signal；The feedback circuit is used to connect
Reduction voltage circuit or current control are sent to by constant pressure output equivalent signal and according to constant pressure output equivalent signal generation control signal
Circuit.
Further, the reduction voltage circuit includes high-voltage MOS pipe.
Specifically, the current control circuit includes FET NM1, NM1 drain electrode and current control circuit input
Connection, source electrode are connected with current control circuit output end, and grid is connected with current control circuit control terminal.
Preferably, the voltage sampling circuit includes decompression member, and one end of the decompression member connects with sample circuit input
Connect, the other end is connected with sample circuit output end.
Preferably, the feedback circuit includes comparison circuit, NMOS control pipes；One input of the comparison circuit with it is anti-
Current feed circuit input is connected, and comparator output terminal is connected with the grid of NMOS control pipes, drain electrode and the feedback electricity of NMOS control pipes
The first, second control terminal connection on road.
Circuit for generating constant voltage on a kind of chip, including above-mentioned piece, high input voltage pin；Described upper constant voltage
Generation circuit is directly connected to high input voltage pin.
The invention has the advantages that：The present invention by directly from VDRAIN pins introduce voltage, reached simplified inside
Design, reference voltage output accuracy is improved, and external high pressure power supply can be directly accessed, the purpose of convenient use.
Brief description of the drawings
Fig. 1 is the piece external circuit schematic diagram shown in background of invention；
Fig. 2 is constant-voltage circuit module map on the piece described in the specific embodiment of the invention；
Fig. 3 is constant-voltage circuit module map on the piece described in the specific embodiment of the invention；
Fig. 4 is the piece external circuit schematic diagram described in the specific embodiment of the invention.
Description of reference numerals：
1st, reduction voltage circuit；
2nd, current control circuit；
3rd, voltage sampling circuit；
4th, feedback circuit；
11st, circuit for generating constant voltage on piece；
22nd, with reference to bias unit；
33rd, excessively stream short-circuit protection unit；
44、TdemSampling unit；
55th, constant-current control unit；
66th, comparator.
Embodiment
To describe the technology contents of the present invention, construction feature, the objects and the effects in detail, below in conjunction with embodiment
And accompanying drawing is coordinated to be explained in detail.
Fig. 2 or Fig. 3 is referred to, the present invention designs circuit for generating constant voltage on a kind of piece, including reduction voltage circuit 1, electric current
Control circuit 2, voltage sampling circuit 3, feedback circuit 4；
The input of reduction voltage circuit 1 is connected with the outer input voltage of piece, the output end of reduction voltage circuit 1 and current control circuit 2
Input connects, and the output end of current control circuit 2 is connected with constant pressure output end VCC, the output end of current control circuit 2 also with
The input of sample circuit 3 is connected, and the output end of sample circuit 3 is connected with the input of feedback circuit 4, the feedback circuit 4
First control terminal is connected with the control terminal of reduction voltage circuit 1, and the second control terminal and the current control circuit 2 of the feedback circuit 4 control
End connection；By above-mentioned connection, 4 circuit modules constitute an entirety, and reduced pressure operation is carried out to external voltage, are electricity on piece
Road provides new constant pressure source.
For functionally, the reduction voltage circuit 1 is used to input voltage outside piece being converted to low pressure output, such as in Fig. 4
High voltage input terminal directly accesses outside our pieces to pin VDRAIN in shown embodiment, high input voltage here with it is low
Pressure output is a relative concept, it is considered that on chip the voltage that can bear of electronic component in -0.3 volt to tens
Fu Jian；The 85-265V as shown in Figure 4 much smaller than the mains voltage that outside is directly accessed, the current control circuit 2 is used for will be low
Pressure output is converted to constant pressure output；The sample circuit 3 is used to gather constant pressure output VCC equivalent signals；The value of equivalent signal with
VCC outputs have correlation, and such as in the embodiment shown in Figure 2, the output end of sample circuit in VCC output ends with only leading to
A dropping resistor connection is crossed, has proportional relation between its equivalent signal collected and VCC outputs.The feedback circuit 4 is used
In receiving constant pressure output equivalent signal and be sent to reduction voltage circuit 1 or electric current according to constant pressure output equivalent signal generation control signal
Control circuit 2.In general, feedback circuit can just reach default effect using a comparator or phase inverter.Pass through
Such scheme, invention achieves will carry out constant pressure output after the external voltage step-down that can bear higher than element on chip
Technique effect, caused voltage stabilization is effective, and can reduce system power dissipation.
In some further embodiments, the reduction voltage circuit includes high-voltage MOS pipe.The drain-source of high-voltage MOS pipe
It is connected with reduction voltage circuit input/output terminal, grid is connected with reduction voltage circuit control terminal.In the embodiment shown in Figure 2, high-pressure MOS
Pipe is managed from JEFT, and in the embodiment shown in fig. 3, high-voltage MOS pipe is managed from HVNMOS, and input impedance is all very high, and all
It is the device of voltage driving, transfer characteristic is all parabolic relation, then in the absence of 3 cross modulation noises.While MOSFET
Input impedance is more higher than JFET.MOSFET is poor for the resistivity of static discharge (ESD), therefore in MOSFET input
End generally requires to set the components such as the diode for preventing that ESD from destroying.JFET is usually the device of depletion type, and MOSFET can be with
There is enhancement device.Therefore, when in use, JFET grid can only additional backward voltage, for forward direction input voltage then not
Can normal work.MOSFET due to existing depletion type, also have it is enhanced, then also being capable of normal work when input voltage signal is larger
Make.User can select according to reality to the demand of circuit, and both high-voltage tubes can bear tens volts of external voltage input,
And relatively low voltage output can be produced, and be not easy to puncture, there is very high security.
In other specific embodiments, as shown in figure 3, the current control circuit includes FET NM1, NM1
Drain electrode be connected with current control circuit input, source electrode is connected with current control circuit output end, grid and current control electricity
Road control terminal connection.In order to preferably carry out the output of voltage stabilizing, can also be connected between current control circuit input and NM1
The function that current control circuit carries out constant pressure output VCC on piece can be better achieved in one resistance, embodiment of above.
In some other preferred embodiment, the voltage sampling circuit include decompression member, it is described decompression member one end with
Sample circuit input is connected, and the other end is connected with sample circuit output end.Voltage sampling circuit only can pass through a wire
With regard to completing, so sample circuit is inaccurate and is easily disturbed by fluctuation, for the voltage sampling circuit that solves the above problems
In can avoid above mentioned problem by being depressured member, the decompression in dropping resistor R1 and Fig. 3 in embodiment as shown in Figure 2
Resistance R3, it can reach requirement, unlike, in the embodiment that Fig. 3 is shown, also by being connected in the bypass of dropping resistor
PMOS P1, P2, branch road series connection electric capacity is defeated further to prevent circuit from puncturing and reduce sample circuit where dropping resistor
Go out the voltage at end.Preferably solves the design problem of sample circuit.
In other preferred embodiments, the feedback circuit 4 includes comparison circuit, NMOS control pipes；The comparison circuit
An input be connected with feedback circuit input, comparator output terminal is connected with the grid of NMOS control pipes, NMOS control pipes
Drain electrode and feedback circuit first, second control terminal connect.Comparison circuit can select comparator, such as Fig. 2, and comparator is used for
Sampled voltage is exported compared with reference voltage V bias, Vbias voltages here can be entered by the other parts on piece
Row generation.Or embodiment as indicated at 3 builds a comparison circuit according to existing way, comparison circuit comparison basis, plays
With comparator identical function.Described NMOS control pipes are used for the ground connection bypass for connecting reduction voltage circuit, current control circuit, from
And play the function of a feedback regulation.
Embodiments of the Fig. 2 as an entirety, as VCC=0, PLDMOS, NM1 conducting, JFET provide electric current item C1 and filled
Electricity, VCC gradually rises and produces Vbias by circuit, and obtains K*VCC, K*VCC and Vbias in R1, R2 partial pressure and compared
Compared with, when K*VCC is more than Vbias, COMPARATOR output low-voltages, IN1 output HIGH voltages, NM2 conductings, then NM1 grids drawing
It is low so that NM1 turn off, not provide electric current VCC reduce, work as K*VCC<During Vbias, JFET, NM1 conducting, there is provided electric current, VCC liters
It is high.It is final to make VCC stable in a required value.
Embodiment as shown in Figure 3, works as VCC=0, inputs high pressure, and a kind of high-tension current device HVNMOS produces electric current, and one
The N1 conductings of kind charging current control circuit, electric current flow into N1, gradually rise VCC voltages by a kind of voltage differences circuit, and one
The processing of kind sampled voltage and feedback circuit detect that VCC voltages raise, and D1 ends cathode voltage is gradually reduced, set when VCC is increased to
D1 negative electrodes are reduced to INV threshold values once when determining threshold value, INV output high level, turn on N3, N3 drain electrode is pulled low, so as to one
The N1 shut-offs of kind charging current control circuit, VCC chargings stop.Above circuit only works in system electrification, when VCC reaches corresponding
After value, the circuit is closed, and VCC is powered by peripheral assists winding.Conventional method is powered by peripheral R1 resistance, and R1 resistance is in normal
Logical state, the moment is in consumption power consumption, therefore this circuit greatly reduces system power dissipation.
To sum up, such scheme all solves the problems, such as that constant pressure exports on piece.
The embodiment that Fig. 4 is shown elaborates the novelty on chip structure, figure middle part exhibition in more detail
A kind of new chip, including circuit for generating constant voltage 11 on above-mentioned piece, high input voltage pin V are showndrain；High input voltage
Pin refers to the voltage input levels that can bear higher than element on piece, described upper circuit for generating constant voltage and high input voltage pin
It is directly connected to, and constant pressure output VCC is that other assemblies are powered on piece on output chip, such as refers to the biased electrical of bias unit 22
Pressure can be exported to produce by accessing constant pressure on piece, so to reference to the biasing circuit component requirement in bias unit 22 and essence
Degree requirement will decline.Other such as excessively stream short-circuit protection unit 33, TdemSampling unit 44, constant-current control unit 55, comparator
66 etc., it can also be powered by circuit for generating constant voltage on piece.Comparison diagram 1 is it will be seen that original ginseng in Fig. 1
Examining biasing circuit needs to provide power input by non-high input voltage pin VCC pins, regenerates on bias voltage drive circuit
Other elements, cause VCC pin needs normally opened, VCC pins need to power by peripheral R1 resistance, and R1 resistance is in normal open shape
State, moment have connect a filter capacitor in consumption power consumption, the VCC pins in Fig. 4, in fact can also save it is external, so as to phase
The elements such as R1, D2 than design can be reduced in prior art, therefore this circuit greatly reduces the outer electric power system system of whole piece
System power consumption.
The scope of patent protection for being only embodiments of the invention, not thereby limiting the present invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1. circuit for generating constant voltage on a kind of piece, it is characterised in that including reduction voltage circuit, current control circuit, voltage sample
Circuit, feedback circuit；
The reduction voltage circuit input is connected with the outer input voltage of piece, and reduction voltage circuit output end connects with current control circuit input
Connect, the current control circuit output end is connected with constant pressure output end, and current control circuit output end also inputs with sample circuit
End connection, the sample circuit output end are connected with feedback circuit input, the first control terminal and the decompression of the feedback circuit
Circuit control terminal is connected, and the second control terminal of the feedback circuit is connected with current control circuit control terminal；
The reduction voltage circuit is used to input voltage outside piece being converted to low pressure output, and the current control circuit is used for low pressure is defeated
Go out to be converted to constant pressure output；The sample circuit is used to gather constant pressure output equivalent signal；The feedback circuit is used to receive perseverance
Pressure output equivalent signal is simultaneously sent to reduction voltage circuit or current control circuit according to constant pressure output equivalent signal generation control signal.
2. according to claim 1 upper circuit for generating constant voltage, it is characterised in that the reduction voltage circuit includes high pressure
Metal-oxide-semiconductor.
3. according to claim 1 upper circuit for generating constant voltage, it is characterised in that the current control circuit includes
FET NM1, NM1 drain electrode are connected with current control circuit input, and source electrode is connected with current control circuit output end, grid
Pole is connected with current control circuit control terminal.
4. according to claim 1 upper circuit for generating constant voltage, it is characterised in that the voltage sampling circuit includes
Decompression member, one end of the decompression member are connected with sample circuit input, and the other end is connected with sample circuit output end.
5. according to claim 1 upper circuit for generating constant voltage, it is characterised in that the feedback circuit includes comparing
Circuit, NMOS control pipes；One input of the comparison circuit is connected with feedback circuit input, comparator output terminal and NMOS
The grid connection of control pipe, the drain electrode of NMOS control pipes and first, second control terminal of feedback circuit connect.
6. a kind of chip, it is characterised in that produce electricity including constant voltage on the piece according to claim any one of 1-5
Road, high input voltage pin；Described upper circuit for generating constant voltage is directly connected to high input voltage pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710945210.1A CN107634650A (en) | 2017-10-12 | 2017-10-12 | Circuit for generating constant voltage and chip on piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710945210.1A CN107634650A (en) | 2017-10-12 | 2017-10-12 | Circuit for generating constant voltage and chip on piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107634650A true CN107634650A (en) | 2018-01-26 |
Family
ID=61104007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710945210.1A Pending CN107634650A (en) | 2017-10-12 | 2017-10-12 | Circuit for generating constant voltage and chip on piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107634650A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010191870A (en) * | 2009-02-20 | 2010-09-02 | Ricoh Co Ltd | Power supply circuit and its operation control method |
| CN102035409A (en) * | 2010-12-13 | 2011-04-27 | 成都成电硅海科技股份有限公司 | Switching power supply control chip |
| JP2011090495A (en) * | 2009-10-22 | 2011-05-06 | Ricoh Co Ltd | Constant current driver circuit |
| CN102214988A (en) * | 2010-04-06 | 2011-10-12 | 大连精拓光电有限公司 | System for providing low-voltage protection for switch power supply converter |
| CN202750011U (en) * | 2012-07-16 | 2013-02-20 | 上海山小电子科技有限公司 | Boost conversion circuit with constant-current and constant-voltage output |
| CN103023298A (en) * | 2013-01-04 | 2013-04-03 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC (alternating current to digital current) switching mode power converter |
| CN103092244A (en) * | 2011-10-28 | 2013-05-08 | 爱思开海力士有限公司 | Multi-regulator circuit and integrated circuit including the same |
| CN103280981A (en) * | 2013-05-16 | 2013-09-04 | 北京波尔通信电源设备有限公司 | Device and method for high-voltage current step-down |
| CN103687201A (en) * | 2013-11-21 | 2014-03-26 | 浙江大学 | Constant-current drive system of LED string lights |
| CN207234673U (en) * | 2017-10-12 | 2018-04-13 | 福建省福芯电子科技有限公司 | On piece circuit for generating constant voltage and chip |
-
2017
- 2017-10-12 CN CN201710945210.1A patent/CN107634650A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010191870A (en) * | 2009-02-20 | 2010-09-02 | Ricoh Co Ltd | Power supply circuit and its operation control method |
| JP2011090495A (en) * | 2009-10-22 | 2011-05-06 | Ricoh Co Ltd | Constant current driver circuit |
| CN102214988A (en) * | 2010-04-06 | 2011-10-12 | 大连精拓光电有限公司 | System for providing low-voltage protection for switch power supply converter |
| CN102035409A (en) * | 2010-12-13 | 2011-04-27 | 成都成电硅海科技股份有限公司 | Switching power supply control chip |
| CN103092244A (en) * | 2011-10-28 | 2013-05-08 | 爱思开海力士有限公司 | Multi-regulator circuit and integrated circuit including the same |
| CN202750011U (en) * | 2012-07-16 | 2013-02-20 | 上海山小电子科技有限公司 | Boost conversion circuit with constant-current and constant-voltage output |
| CN103023298A (en) * | 2013-01-04 | 2013-04-03 | 无锡硅动力微电子股份有限公司 | Self-powered circuit applied to AC-DC (alternating current to digital current) switching mode power converter |
| CN103280981A (en) * | 2013-05-16 | 2013-09-04 | 北京波尔通信电源设备有限公司 | Device and method for high-voltage current step-down |
| CN103687201A (en) * | 2013-11-21 | 2014-03-26 | 浙江大学 | Constant-current drive system of LED string lights |
| CN207234673U (en) * | 2017-10-12 | 2018-04-13 | 福建省福芯电子科技有限公司 | On piece circuit for generating constant voltage and chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104518654B (en) | High-voltage starting circuit | |
| CN107179800B (en) | A kind of internal electric source generation circuit with clamper function | |
| CN101923110B (en) | Method and device for detecting abnormal current of circuit | |
| CN103219893B (en) | Switch power controller and switching power circuit | |
| CN205484701U (en) | Last electricity time of ICPMU and relapse powering up and down stability test circuit | |
| CN105955094A (en) | Power regulation control circuit of electronic cigarette | |
| CN205610314U (en) | Super capacitor charging and discharging circuit and metering device who makes with this circuit | |
| CN207234673U (en) | On piece circuit for generating constant voltage and chip | |
| CN103354690B (en) | Auxiliary-winding-free primary side controlled LED (light-emitting diode) driving circuit and PFC (power factor correction) constant-current control circuit thereof | |
| CN103487658B (en) | The testing circuit of high terminal voltage bootstrap N-type switch conduction resistance | |
| CN103217615B (en) | Output short-circuit detection circuit | |
| CN109995331A (en) | A kind of voltage regulator circuit for thering is soft start to protect | |
| CN106774599A (en) | A kind of voltage modulator circuit of high PSRR | |
| CN102035409B (en) | Switching power supply control chip | |
| CN109245535A (en) | Level switch module suitable for power management | |
| CN109194126A (en) | A kind of power supply switch circuit | |
| CN107634650A (en) | Circuit for generating constant voltage and chip on piece | |
| CN103683892B (en) | Switching Power Supply and controller thereof | |
| CN203233312U (en) | Switch power supply controller and switch power supply device | |
| CN102832797A (en) | High-voltage current source multiplexing sampling circuit and switching power supply | |
| CN108496291A (en) | Farad capacitor charging circuit and electronic equipment | |
| CN201928197U (en) | Switching power supply control system | |
| CN107959476A (en) | Low power consumption current hunger type pierce circuit | |
| CN207410244U (en) | A kind of double winding power circuit | |
| CN209055869U (en) | A kind of linear voltage-stabilizing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 350001 the 22 layer C and D unit of the No. 5 building, F District, Fuzhou Software Park, No. 89, the software avenue of the Drum Tower District, Fuzhou, Fujian Applicant after: FUJIAN FUXIN ELECTRONIC TECHNOLOGY CO., LTD. Address before: 350001 room 28, floor 28, building No. 1, F District, Fuzhou Software Park, No. 89, the software avenue of the Drum Tower District, Fuzhou, Fujian Applicant before: FUJIAN FUXIN ELECTRONIC TECHNOLOGY CO., LTD. |