CN209134301U - A kind of three rail power generating devices - Google Patents
A kind of three rail power generating devices Download PDFInfo
- Publication number
- CN209134301U CN209134301U CN201822216009.2U CN201822216009U CN209134301U CN 209134301 U CN209134301 U CN 209134301U CN 201822216009 U CN201822216009 U CN 201822216009U CN 209134301 U CN209134301 U CN 209134301U
- Authority
- CN
- China
- Prior art keywords
- inductance
- capacitor
- rectifier diode
- circuit
- switch pipe
- 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.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
A kind of three rail power generating devices, belong to electronic technology field, it is characterised in that: including MOS switch pipe Q1, capacitor Cin, inductance L1, inductance L2, inductance L3, rectifier diode D1, rectifier diode D2, rectifier diode D3, transformation capacitor CS1, transformation capacitor CS2, filter capacitor Co1, filter capacitor Co2, filter capacitor Co3 and the feedback control network controlled by PWM；The direct transform circuit of the booster circuit of Boost structure, the negative translation circuit of Cuk structure and Sepic structure shares input capacitance Cin, MOS switch pipe Q1, feedback control network and inductance L1；Feedback control network is set between rectifier diode D3 and MOS switch pipe Q1, for sampling and controlling the duty ratio D of PWM.Circuit volume and cost are reduced, three different converters share Cin, L1, Q1 and feedback control network, there is better Electro Magnetic Compatibility and stability.The Vo of output can be higher than input voltage vin, can also be lower than input voltage vin, be particularly suitable for Vin and change bigger battery powered field of employment.
Description
Technical field
The utility model belongs to electronic technology field, and further subdivision belongs to DC-DC power source conversion technical field, especially relates to
And a kind of three rail power generating devices.
Background technique
In electronic circuit, it is often necessary to plurality of specifications power supply is used, especially in fields of measurement, in order to improve the line of amplifier
Property degree and dynamic range, the system of single supply power supply can provide negative supply lower than GND to amplifier and higher than system power supply VCC's
Positive supply, these power supplys are generated usually using DC-DC circuit, and in existing technology, more rail power supplys are needed with multiple DC-DC
Circuit is completed, and circuit is complicated and at high cost, and the synchronous working for carrying out PWM control frequency is usually required between multiple DC-DC, with
Improve system stability and Electro Magnetic Compatibility.
Using the DC-DC circuit of fly-back structure, multiple groups different electrical power can be generated simultaneously, but fly-back circuit needs
Transformer is used, and the characteristics of due to self structure, input and output electric current is discontinuous, therefore volume is larger, electric current
Ripple is larger, and fly-back circuit more rail power supplys generated are in load imbalance, more rail supply voltage deviations of generation
It is larger.
Summary of the invention
The utility model aims to solve the problem that the above problem, provides a kind of three rail power generating devices small in size, at low cost.
Three rails power generating devices described in the utility model, including controlled by PWM MOS switch pipe Q1, capacitor Cin,
Inductance L1, inductance L2, inductance L3, rectifier diode D1, rectifier diode D2, rectifier diode D3, transformation capacitor CS1, transformation
Capacitor CS2, filter capacitor Co1, filter capacitor Co2, filter capacitor Co3 and feedback control network；The capacitor Cin, MOS switch
Pipe Q1, inductance L1, rectifier diode D1, filter capacitor Co1 constitute the boost DC-DC circuit of Boost structure；The capacitor Cin,
MOS switch pipe Q1, inductance L1, transformation capacitor CS1, inductance L2, rectifier diode D2, filter capacitor Co2 constitute the negative of Cuk structure
Convert DC-DC circuit；The capacitor Cin, MOS switch pipe Q1, inductance L1, transformation capacitor CS2, inductance L3, rectifier diode D3,
The direct transform DC-DC circuit of filter capacitor Co3 composition Sepic structure；Boost DC-DC circuit, the Cuk knot of the Boost structure
The direct transform DC-DC circuit of the negative transformation DC-DC circuit of structure and Sepic structure shares input capacitance Cin, MOS switch pipe Q1, anti-
Feedback control network and inductance L1；The boost DC-DC circuit, negative transformation DC-DC circuit and direct transform DC-DC circuit have identical
Switching frequency and duty ratio D；The feedback control network is set between rectifier diode D3 and MOS switch pipe Q1, is used for
Sample and control the duty ratio D of PWM.
Three rails power generating devices described in the utility model, the inductance L1, inductance L2, inductance L3 use same magnetic core
Doubling coiling constitutes transformer T；1,3,5 pins of the transformer T are Same Name of Ends, and 2,4,6 pins are another Same Name of Ends.L1
Two pins be T 1,2 pins, two pins of L2 are 3,4 pins of T, and the pin of L3 is 5,6 pins of T；Therefore transformer T
1,3,5 pins be Same Name of Ends, 2,4,6 pins be another Same Name of Ends.
1 pin of three rails power generating devices described in the utility model, the T is connected with input power Vin, 2 pipes of T
Foot is connected with the drain electrode of MOS switch pipe Q1, and the source electrode of MOS switch pipe Q1 is connected with systematically GND, and 4,6 pins of T pass through respectively
Transformation capacitor CS1, capacitor CS2 are connected with the drain electrode of MOS switch pipe Q1, and the anode of rectifier diode D1 is with MOS switch pipe Q1's
Drain electrode is connected, and the cathode of rectifier diode D1 is Vin+Vo output end, exports stable voltage by filter capacitor Co1 filtering
Vin+Vo；4 pins of the T are connected with rectifier diode D2 anode, rectifier diode D2 cathode connection systematically GND, and the 3 of T
Pin is-Vo output end, exports stable voltage-Vo after filter capacitor Co2 filtering；5 pins of the T and systematically
GND is connected, and 6 pins of T are connected with the anode of rectifier diode D3, and the cathode of rectifier diode D3 is+Vo output end, through filtering
Stable voltage+Vo is exported after wave capacitor Co3 filtering；Feedback control network is sampled by+Vo and controls the duty ratio of PWM to reach
To the purpose for adjusting output voltage.
Three rails power generating devices described in the utility model, the inductance L1, inductance L2, inductance L3 constitute 1:1:1's
Transformer T.
Three rails power generating devices described in the utility model, the duty ratio D and output voltage Vo meet:
Three rails power generating devices described in the utility model, when circuit work is in continuous current mode, D is PWM
The duty ratio of wave；When circuit work in discontinuous conduct mode, the meaning of D are as follows:
Wherein tQFor the time of Q1 conducting, tDFor the time of rectifier diode forward conduction.
The condition of three rails power generating devices described in the utility model, the rectifier diode conducting is inductance L1, electricity
Sense L2, inductance L3 electric current drop to before 0, i.e., the magnetic flux in inductance core drops to before 0；It will be understood that at tDFor MOS
This period before magnetic flux after pipe Q1 closing into inductance core drops to 0.
Three rails power generating devices described in the utility model are by a MOS switch pipe Q1 using PWM control；One defeated
Enter capacitor Cin；It is wound on inductance L1, L2, L3 of three 1:1:1 on same magnetic core；Three rectifier diodes D1, D2, D3；Two
It converts capacitor CS1, CS2 and three filter capacitors Co1, Co2, Co3 and feedback control network is constituted；Cin, Q1, L1, D1, Co1 structure
At the boost DC-DC circuit of a Boost structure；Cin, Q1, L1, CS1, L2, D2, Co2 constitute the negative transformation of a Cuk structure
DC-DC circuit；Cin, Q1, L1, CS2, L3, D3, Co3 constitute the direct transform DC-DC circuit of a Sepic structure；It works normally
When, circuit externally exports the voltage of three kinds of different sizes :+Vo ,-Vo, Vin+Vo.MOS switch pipe Q1 the closing period and open
There is the translation circuit of input current in the logical period, therefore current ripples are less than the DC-DC circuit of fly-back structure, and circuit is just
Often work when, three inductance L1, L2 and L3 are worked at the same time, mutual inductance effect so that the utility model meaning three rail power supply of one kind
Generating means compare with independent Boost, Cuk, Sepic circuit, and inductance can be reduced to independent electrical under same operating condition
The 1/3 of road, so that the volume and cost of entire circuit are reduced, while input terminal, three different DC-DC converter Boost,
Sepic, Cuk circuit have shared Cin, L1, Q1 and feedback control network, thus three converters do not need to carry out control frequency it is same
Step, relative to three independent DC-DC circuits are used, there is better Electro Magnetic Compatibility and stability.The Vo of output can be higher than defeated
Enter voltage Vin, input voltage vin can also be lower than, be particularly suitable for Vin and change bigger battery powered field of employment.
Detailed description of the invention
Fig. 1 three rails power generating devices circuit diagram described in the utility model；
The three rail power generating devices circuit diagrams constituted described in Fig. 2 embodiment two using Boost chip SX1308；
The three rail power generating devices circuit diagrams constituted described in Fig. 3 embodiment three using Buck chip MP2303.
Specific embodiment
Three rails power generating devices described in the utility model are described in detail with reference to the accompanying drawings and embodiments.
Three rail power generating devices in one the present embodiment of embodiment, as shown in Figure 1 by a MOS using PWM control
Switching tube Q1；One input capacitance Cin；It is wound on inductance L1, L2, L3 of three 1:1:1 on same magnetic core；Three two poles of rectification
Pipe D1, D2, D3；Two transformation capacitor CS1, CS2, three filter capacitors Co1, Co2, Co3 and feedback control network are constituted；Three
It is another Same Name of Ends that 1,3,5 pins of the transformer T, T of one 1:1:1 of inductance L1, L2, L3 composition, which are 2,4,6 pin of Same Name of Ends,
1 pin of T is connected with input power Vin, and 2 pins of T are connected with the drain electrode of Q1, and the source electrode of Q1 is connected with systematically GND, T's
4,6 pins pass through transformation capacitor CS1, CS2 respectively and are connected with the drain electrode of Q1, and the anode of D1 is connected with the drain electrode of Q1, the cathode of D1
For Vin+Vo output end, stable voltage Vin+Vo is exported by C1 filtering；4 pins of T are connected with D2 anode, the connection of D2 cathode
3 pins of systematically GND, T are-Vo output end, and stable voltage-Vo is exported after Co2 is filtered；5 pins of T and systematically
GND is connected, and 6 pins of T are connected with the anode of D3, and the cathode of D3 is+Vo output end, and stable electricity is exported after Co3 is filtered
Pressure+Vo；Feedback control network is sampled by+Vo and controls the duty ratio of PWM to achieve the purpose that adjust output voltage.
As shown in Figure 1, capacitor Cin, Q1, L1, D1, Co1 constitute a Boost circuit, and when normal work, Q1 conducting
When, input power Vin magnetizes energy storage to L1, and when Q1 is closed, L1 is charged by D1 to Co1, if the PWM that control Q1 conducting is closed is accounted for
Sky ratio is D, then the voltage Vin+Vo at the both ends Co1 are as follows:
(1) formula is that Boost circuit works in continuous current mode, and ignores the ideal shape of rectifier diode D1 forward voltage drop
Under state, the relationship of input voltage and output voltage；When Boost circuit work is in discontinuous conduct mode, then the meaning of D are as follows:
(2) in formula, tQFor the time of Q1 conducting, tDFor the time of diode D1 forward conduction, if considering rectifier diode
The forward voltage drop of D1, then (1) can be rewritten as:
Wherein VfFor the forward conduction voltage drop of rectifier diode.
Capacitor Cin, Q1, L1, CS1, L2, D2, Co2 constitutes the negative transformation DC-DC electricity of a Cuk structure in the present embodiment
Road, when normal work, the voltage on CS1 is equal to the sum of input voltage vin and output voltage Vo absolute value.It is defeated when Q1 conducting
Enter power supply to magnetize energy storage to L1, the left end of CS1 with connect, and discharge to L2 and C2, L2 also magnetizes energy storage, at this time L1 and L2 two
Hold voltage equal with input voltage, when Q1 shutdown, L1 stored energy is charged by D2 to CS1, while stored energy on L2
It charges also through D2 to output capacitance Co2, L1 and Lo2 both end voltage is equal to the positive pressure that output voltage absolute value adds D2 at this time
Drop, the input voltage of Cuk circuit and the transformational relation of output voltage are as follows:
When in view of rectifier diode D2 forward voltage drop, (4) formula is rewritten are as follows:
Identical as Boost circuit, meaning of the D in continuous current mode and discontinuous current mode is different.
Capacitor Cin, Q1, L1, CS2, L3, D3, Co3 constitutes the direct transform DC-DC electricity of a Sepic structure in the present embodiment
Road, when normal work, the voltage on CS2 is equal to input voltage, and when Q1 conducting, input power magnetizes energy storage to L1, and CS2 passes through
Left end and ground are connected, and are discharged to L3, and L3 also magnetizes energy storage, L1 and L3 both end voltage is equal with input voltage at this time, works as Q1
When shutdown, L1 stored energy discharges to CS2, and is further charged by D3 to output capacitance Co3, while stored energy is also on L3
It is charged by D3 to output capacitance Co3, L1 and L3 both end voltage is equal to output voltage absolute value plus the positive pressure of D3 at this time
Drop, the input voltage of Sepic circuit and the transformational relation of output voltage are as follows:
When in view of rectifier diode D3 forward voltage drop, (6) formula is rewritten are as follows:
Available by above-mentioned formula (3), (5), (7) formula, when the D in Boost, Cuk, Sepic circuit is identical, this is practical new
The voltage of the output of three rail power generating devices described in type is Vin+Vo ,-Vo and+Vo respectively, when circuit work is in continuous electricity
When stream mode, D, which is obviously only turned on and off by Q1, to be influenced, and the D in Boost, Cuk, Sepic circuit is identical, works as electricity
Road works when discontinuous conduct mode, and D is provided by (2) formula, for Boost circuit, tDIt is magnetic flux in L1 after Q1 is closed
The time for dropping to 0, for Cuk circuit, tDIt is after Q1 is closed, magnetic flux drops to for 0 time in L1, L2, for Sepic electricity
Road, tDIt is after Q1 is closed, magnetic flux drops to for 0 time in L1, L3, since L1, L2, L3 are wound on the same magnet ring, ignores
When its leakage inductance, then the magnetic flux of L1, L2, L3 are identical.Therefore, it works in Boost, Cuk, Sepic circuit in discontinuous current
When mode, their D is also identical, therefore under the action of feedback control circuit appropriate, described in the utility model three
When rail power generating devices work normally, three different voltages of output Vin+Vo ,-Vo and+Vo that can be stable.Entire circuit
In+Vo be used only export sampling end as feedback control network, stablizing for three rail power supplys can be realized and export, work as different voltages
In the case that the load deviation of output end is larger or load variation is bigger, Ying Caiyong proportional amplifier is electric by Cuk and Boost
The voltage Vo part mapping of road output is poor to voltage-to-ground, and uses sampling end of the multi-channel sampling as feedback control network.
Embodiment two on the basis of example 1, constitutes three rails electricity using domestic Boost chip SX1308 as shown in Figure 2
Source generating means, the MOS device of Boost power adapter built in SX1308 can be used for realizing Q1 and feedback control in embodiment one
The function of network processed.
L1, L2, L3 as shown in Figure 2 use outer diameter for 7.87mm, the Sendust Cores of initial μ=125, diameter 0.5mm's
Enameled wire, three lines and around 7 circles, single inductance are about 2.2 μ H, and capacitor Cin selects 22 μ F ceramic disc capacitors, Co1, Co2, Co3 selection
10 μ F ceramic disc capacitors, D1, D2, D3 select Schottky diode 1N5219, and CS1, CS2 select 2.2 μ F ceramic disc capacitors.
The FB reference voltage of SX1308 chip is 0.6V, and Rf1, Rf2 are feedback divider resistance, selects Rf1 for 10K, Rf2 is
When 45K, Vo 3.3V, when input voltage is 2-12V, the exportable -3.3V of embodiment two ,+3.3V and 5.3- as shown in Figure 2
Three kinds of voltages of 15.3V.
Implement three as shown in figure 3, embodiment three uses Buck power conversion chip MP2303 as control chip, external N
The three rail power generating devices that channel MOS is constituted, since MP2303 is the Buck conversion chip for being integrated with the MOS of synchronous rectification,
And be Buck structure, the function of Q1 cannot be directly served as using built-in MOS, it is therefore desirable to which the MOS of external N-channel is as Q1.
As shown in figure 3, R1 and DZ is used to provide a stable operating voltage for MP2303, which is also that Q1 grid drives
Dynamic maximum voltage is suitable for selection between 7-15V, and R2 is to make to can control biasing resistor, and C5 is the bootstrapping electricity of built-in MOS driving
Hold, C6 is soft start delay electric capacity, and R5, C10 constitute control compensation circuit.U2 is double operational LM258, and power use-Vo and Vin
+ Vo, wherein U2A and two Rf constitutes reversed 1:1 amplifier, and it is defeated by 1 pin of U2 that the-Vo of output is converted to positive voltage over the ground
Out, U2B and 4 Rf constitutes the proportional amplifier of 1:1, by the voltage difference between Vin+Vo and Vin, is transformed into the electricity of opposite GND
Pressure difference, and exported by 7 pins of U2, the Vo value of 1 pin of U2 and 7 pins difference Cuk circuit and Boost circuit, Rf21,
Rf22, Rf23, Rf24 constitute partial pressure feedback net, and feedback sample source is respectively from the output of Boost, Cuk and Sepic circuit
End, the FB voltage of MP2303 are 0.8V, and the Vo in Fig. 2 is then 5V, and when input Vin is 18-28V at that time, embodiment can be defeated in Fig. 3
- 5V ,+5V and tri- kinds of voltages of 23-33V out.
As shown in figure 3, the TPN4R806PL of Q1 selection Toshiba, conducting resistance 4.8m Ω, pressure-resistant 60V, L1, L2, L3 selection
Outer diameter 12.7mm, the Sendust Cores of initial μ=125, the enameled wire of diameter 0.7mm, four lines and around 15 circles, wherein two lines and connecing
For L1, in addition two lines are respectively used to L2 and L3, and single inductance is about that 10 μ H, Cin select the ceramic disc capacitor of two 47 μ F in parallel,
Co1, Co2, Co3 select the ceramic disc capacitor of 47 μ F, and D1, D2, D3 select Schottky diode 1N5219, and CS1, CS2 select 2.2 μ F
Ceramic disc capacitor.Rf, Rf21 select 1% metalfilmresistor of 10k, and Rf22, Rf23, Rf24 select 1% metalfilmresistor of 157K,
Under normal running conditions, each power output end of embodiment 2 can provide the output electric current not less than 500mA in Fig. 3, and
In the case that load deviation is more than 80%, voltage deviation is no more than 5%.
Above-described embodiment is only the part of the utility model, based on the embodiments of the present invention, general in this field
Logical technical staff every other embodiment obtained without making creative work, belongs to the utility model
The range of protection.
Claims (4)
1. a kind of three rail power generating devices, it is characterised in that: including MOS switch pipe Q1, the capacitor Cin, inductance controlled by PWM
L1, inductance L2, inductance L3, rectifier diode D1, rectifier diode D2, rectifier diode D3, transformation capacitor CS1, transformation capacitor
CS2, filter capacitor Co1, filter capacitor Co2, filter capacitor Co3 and feedback control network；The capacitor Cin, MOS switch pipe
Q1, inductance L1, rectifier diode D1, filter capacitor Co1 constitute the boost DC-DC circuit of Boost structure；The capacitor Cin,
MOS switch pipe Q1, inductance L1, transformation capacitor CS1, inductance L2, rectifier diode D2, filter capacitor Co2 constitute the negative of Cuk structure
Convert DC-DC circuit；The capacitor Cin, MOS switch pipe Q1, inductance L1, transformation capacitor CS2, inductance L3, rectifier diode D3,
The direct transform DC-DC circuit of filter capacitor Co3 composition Sepic structure；Boost DC-DC circuit, the Cuk knot of the Boost structure
The direct transform DC-DC circuit of the negative transformation DC-DC circuit of structure and Sepic structure shares input capacitance Cin, MOS switch pipe Q1, anti-
Feedback control network and inductance L1；The boost DC-DC circuit, negative transformation DC-DC circuit and direct transform DC-DC circuit have identical
Switching frequency and duty ratio D；The feedback control network is set between rectifier diode D3 and MOS switch pipe Q1, is used for
Sample and control the duty ratio D of PWM.
2. three rails power generating devices according to claim 1, it is characterised in that: the inductance L1, inductance L2, inductance L3
Using same magnetic core doubling coiling, transformer T is constituted；1,3,5 pins of the transformer T are Same Name of Ends, and 2,4,6 pins are another
One Same Name of Ends.
3. three rails power generating devices according to claim 2, it is characterised in that: 1 pin and input power of the T
Vin is connected, and 2 pins of T are connected with the drain electrode of MOS switch pipe Q1, and the source electrode of MOS switch pipe Q1 is connected with systematically GND, T's
4,6 pins pass through transformation capacitor CS1 respectively, capacitor CS2 is connected with the drain electrode of MOS switch pipe Q1, the anode of rectifier diode D1
It is connected with the drain electrode of MOS switch pipe Q1, the cathode of rectifier diode D1 is Vin+Vo output end；4 pins of the T and rectification two
Pole pipe D2 anode is connected, and systematically GND, 3 pins of T are-Vo output end to the connection of rectifier diode D2 cathode；5 pins of the T
Systematically GND is connected, and 6 pins of T are connected with the anode of rectifier diode D3, and the cathode of rectifier diode D3 is+Vo output
End.
4. three rails power generating devices according to claim 3, it is characterised in that: the inductance L1, inductance L2, inductance L3
Constitute the transformer T of 1:1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822216009.2U CN209134301U (en) | 2018-12-27 | 2018-12-27 | A kind of three rail power generating devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822216009.2U CN209134301U (en) | 2018-12-27 | 2018-12-27 | A kind of three rail power generating devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209134301U true CN209134301U (en) | 2019-07-19 |
Family
ID=67249478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822216009.2U Active CN209134301U (en) | 2018-12-27 | 2018-12-27 | A kind of three rail power generating devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209134301U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450252A (en) * | 2018-12-27 | 2019-03-08 | 西安奇维科技有限公司 | A kind of three rail power generating devices |
-
2018
- 2018-12-27 CN CN201822216009.2U patent/CN209134301U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109450252A (en) * | 2018-12-27 | 2019-03-08 | 西安奇维科技有限公司 | A kind of three rail power generating devices |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI492483B (en) | Step - up battery charge management system and its control method | |
| TWI243530B (en) | Zero-voltage switching push-pull converter | |
| CN102946199A (en) | Direct current insulation buck converter and matrix voltage detection circuit thereof | |
| CN106452041B (en) | A kind of AC-DC Switching Power Supply power supply circuit for realizing high-voltage high-speed starting using PowerMOS pipe | |
| TW202007064A (en) | Bidirectional DC-DC converter | |
| CN103683936A (en) | Two-way digital DC-DC convertor with wide load range | |
| CN103647448B (en) | Integrated step-down-flyback type high power factor constant current circuit and device | |
| US8384356B2 (en) | Self contained power source | |
| CN109494989A (en) | A kind of small-power voltage compensation combined type DC/DC converter circuit and its working method | |
| CN201860261U (en) | Boost circuit | |
| Schaef et al. | 10.2 A digitally controlled 94.8%-peak-efficiency hybrid switched-capacitor converter for bidirectional balancing and impedance-based diagnostics of lithium-ion battery arrays | |
| CN203617902U (en) | Integrated buck-flyback type high power factor constant current circuit and device | |
| CN109450252A (en) | A kind of three rail power generating devices | |
| CN202940733U (en) | Direct current insulation buck converter and matrix voltage detection circuit thereof | |
| CN101304215B (en) | DC/DC circuit | |
| CN209134301U (en) | A kind of three rail power generating devices | |
| CN104821634A (en) | Lithium battery multiple-path low-voltage DC power supply system with electric quantity detection and method for realizing electric quantity detection by utilizing same | |
| CN202565159U (en) | PFC control circuit capable of flexibly boosting voltage | |
| CN108879919B (en) | Piezoelectric electromagnetic composite energy harvester energy management circuit for supplying power to wireless sensor | |
| CN106685224B (en) | A kind of adaptive voltage scaling device | |
| CN202663314U (en) | AC (alternating current)-DC (direct current) switching power supply converter | |
| CN105375761A (en) | Fly-back switching power supply and loop control circuit thereof | |
| CN206135707U (en) | Utilize powerMOS pipe to realize AC of high -pressure quick start supply circuit for DC switching power supply | |
| CN205681285U (en) | The self-powered circuit of non-isolated booster circuit pwm chip | |
| CN214256137U (en) | Low-power-consumption hybrid dual-output DC-DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |