CN110212764A - A kind of non-isolated DC chopper circuit suitable for data center's voltage regulator module - Google Patents
A kind of non-isolated DC chopper circuit suitable for data center's voltage regulator module Download PDFInfo
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- CN110212764A CN110212764A CN201910481842.6A CN201910481842A CN110212764A CN 110212764 A CN110212764 A CN 110212764A CN 201910481842 A CN201910481842 A CN 201910481842A CN 110212764 A CN110212764 A CN 110212764A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
- H02M3/1586—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel switched with a phase shift, i.e. interleaved
Abstract
The invention discloses a kind of non-isolated DC chopper circuits suitable for data center's voltage regulator module, the cathode of power supply is grounded, the anode of power supply is connected through first switch tube with one end of one end of first capacitor and second switch, the other end of second switch is connected with one end of one end of third switching tube and the second capacitor, the other end of third switching tube is connected with one end of one end of third capacitor and the 4th switching tube, the other end of 4th switching tube and one end of the 5th switching tube, the other end of one end of first inductance and the second capacitor is connected, the other end of 5th switching tube is grounded, the other end of first inductance is connected with one end of one end of load and the second inductance, the other end of first capacitor and the other end of third capacitor, one end of the other end of second inductance and the 6th switching tube is connected, 6th switching tube it is another End ground connection, the other end ground connection of load, small in size, and the negligible amounts of capacitor and switching tube of the circuit.
Description
Technical field
The present invention relates to a kind of non-isolated DC chopper circuits, and in particular to one kind is suitable for data center's voltage and adjusts mould
The non-isolated DC chopper circuit of block.
Background technique
Power electronic technique is the important support technology in national economy and national security field, is to realize power transmission and each
The important technical that class of electronic devices operates normally.High power and efficient transformation of electrical energy are Development of Power Electronic Technology
Ultimate aim.The present invention is based on the basic theories of switching capacity and switched inductors, have devised the big decompression of completely new non-isolation type
The DC-DC converter of ratio.Currently, non-isolated large velocity ratio DC-DC converter is widely used in direct current distributed system, portable electric
Sub- equipment, communication system and voltage regulator module etc..With artificial intelligence, big data and the fast development of cloud computing, in data
The energy consumption of the heart increases year by year, possesses the data center of high-performance multi-core CPU towards more low-voltage (< 1V) and higher electric current
(> 200A) requirement advance, to voltage regulator module, more stringent requirements are proposed.The existing 12V DC bus of data center
Voltage has the higher line loss of data center, and higher 48V DC bus-bar voltage is developing and having been applied in industry
In field, academia and industry indicate following by development 400V busbar voltage, this is small in size and light-weight to large velocity ratio topology
Power supply propose high demand.Traditional buck circuit suitable for application in these great step-down ratio fields,
Since extremely small duty ratio increased dramatically switching loss.The power electronics topology for developing large velocity ratio is inevitable
Gesture.
Presently, there are the DC-DC topology of big step-down ratio be broadly divided into two classes:
The big step-down ratio DC-DC converter of isolated form, this kind of converter is based on isolating transformer no-load voltage ratio and realizes large velocity ratio, this kind of
Topology has LLC, circuit of reversed excitation etc.;
Non-isolated big step-down ratio DC-DC converter, this kind of converter are based on coupling inductance, switching capacity and two-stage topology
Deng.
The topology theory of isolated form is simple, has been commonly utilized in current industrial circle, but due to existing transformer,
Limited power density, volume can not be made small, and which has limited the development of isolation DC-DC topology.Non-isolated topology will be in future
It is an extraordinary candidate, has been obtained for very big concern, the non-isolated topology based on coupling inductance principle is also to lean on circle
Than decompression, essence is as isolated form transformer;Two-stage topology generally approved by industry and academia at present, but two
Grade topology has a large amount of active device, and the loss of usual second level topology is very big;DC-DC topology benefit based on switching capacity
Capacitor is used as energy-storage travelling wave tube to realize no-load voltage ratio, due to no magnetic part, topology is small in size, the advantages such as light-weight and high efficiency.But
Disadvantage is it is also obvious that topological structure determines its voltage change ratio, as voltage change ratio is bigger, switching capacity quantity and active opens
It closes the also more therefore simple switched capacitor topology of pipe quantity and is not appropriate for large velocity ratio step-down applications field.
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of suitable for data center's voltage tune
Save the non-isolated DC chopper circuit of module, small in size, and the negligible amounts of capacitor and switching tube of the circuit.
In order to achieve the above objectives, the non-isolated DC chopped-wave of the present invention suitable for data center's voltage regulator module
Circuit includes power supply, Charles Dixon charge pump and two staggered buck circuits;Wherein, Charles Dixon charge pump include first switch tube,
Second switch, third switching tube, the 4th switching tube, first capacitor, the second capacitor and third capacitor;Two staggered buck circuits
Including the 5th switching tube, the 6th switching tube, the first inductance and the second inductance;
The cathode of power supply is grounded, and the one of positive one end and second switch through first switch tube and first capacitor of power supply
End is connected, and the other end of second switch is connected with one end of one end of third switching tube and the second capacitor, third switch
The other end of pipe is connected with one end of one end of third capacitor and the 4th switching tube, and the other end of the 4th switching tube is opened with the 5th
One end, one end of the first inductance and the other end of the second capacitor for closing pipe are connected, the other end ground connection of the 5th switching tube, and first
The other end of inductance is connected with one end of one end of load and the second inductance, and the other end of first capacitor is another with third capacitor
One end of one end, the other end of the second inductance and the 6th switching tube is connected, the other end of the 6th switching tube ground connection, load it is another
One end ground connection.
First switch tube, second switch, third switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube are equal
For metal-oxide-semiconductor.
Load is made of the 4th capacitor and resistance that are connected in parallel.
When first switch tube and third switching tube are connected, and second switch, the 4th switching tube and the 6th switching tube turn off,
Power supply and first capacitor and the second inductance are formed into a loop, and first capacitor and the second inductance are energized, the electric discharge of the second capacitor, third electricity
Hold and the second inductance is energized, the first inductance is to load discharge, wherein the switch state of the 5th switching tube is not fixed, and the 5th opens
Pipe is closed by the control of feedback voltage, to maintain the stabilization of output voltage.
When first switch tube, third switching tube and the 6th switching tube are connected, and the 4th switching tube and second switch turn off,
The electric current of first inductance and the second inductance simultaneously to load discharge, on the first inductance and the second inductanceWithLinear decline.
When second switch and the 4th switching tube are connected, and first switch tube, third switching tube and the 5th switching tube turn off,
First capacitor releases energy, and the second capacitor and the first inductance are electrically charged;Energy transfer on third capacitor to the first inductance and is born
In load;Second inductance exports energy to load;Electric current on first inductanceLinear to increase, on the second inductance electric currentLinearly
It reduces.
When second switch, the 4th switching tube and the 6th switching tube are connected, and second switch and the 4th switching tube turn off,
The electric current of first inductance and the second inductance simultaneously to load discharge, on the first inductance and the second inductanceWithLinear decline, the
Four capacitors are to conductive discharge.
The invention has the following advantages:
Non-isolated DC chopper circuit of the present invention suitable for data center's voltage regulator module is in concrete operations
When, it is built-up based on switching tube, capacitor and inductance, it avoids using transformer, therefore small volume, power density is higher.It opens
The number for closing pipe is six, and the number of capacitor is three, and the number of inductance is two, compared to the non-isolation type DC- of same type
The number of DC topological circuit, device is less, in practical operation, can select active switching tube, advantageously reduce loss, gather around
There is higher efficiency.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention;
Fig. 2 is schematic diagram of the present invention in state 1;
Fig. 3 is schematic diagram of the present invention in state 2;
Fig. 4 is schematic diagram of the present invention in state 3;
Fig. 5 is schematic diagram of the present invention in state 4;
Fig. 6 is working waveform figure of the invention;
Fig. 7 is input and output voltage waveform diagram of the invention;
Fig. 8 is the voltage stress waveform diagram of switching tube;
Fig. 9 is the voltage oscillogram of capacitor;
Figure 10 is the current waveform figure of inductance.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, the non-isolated DC chopper circuit packet of the present invention suitable for data center's voltage regulator module
Include power supply Uin, Charles Dixon charge pump and two staggered buck circuits;Wherein, Charles Dixon charge pump includes first switch tube S1,
Two switching tube S2, third switching tube S3, the 4th switching tube S4, first capacitor C1, the second capacitor C2 and third capacitor C3;Two intersections
Wrong buck circuit includes the 5th switching tube S5, the 6th switching tube S6, the first inductance L1 and the second inductance L2;The cathode of power supply Uin
The anode of ground connection, power supply Uin is connected through first switch tube S1 with one end of one end of first capacitor C1 and second switch S2,
The other end of second switch S2 is connected with one end of one end of third switching tube S3 and the second capacitor C2, third switching tube S3
The other end be connected with one end of one end of third capacitor C3 and the 4th switching tube S4, the other end of the 4th switching tube S4 and
The other end of one end of five switching tube S5, one end of the first inductance L1 and the second capacitor C2 is connected, and the 5th switching tube S5's is another
The other end of one end ground connection, the first inductance L1 is connected with one end of one end of load Uo and the second inductance L2, first capacitor C1
The other end be connected with one end of the other end of third capacitor C3, the other end of the second inductance L2 and the 6th switching tube S6,
The other end of six switching tube S6 is grounded, and loads the other end ground connection of Uo.
First switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5 and
Six switching tube S6 are metal-oxide-semiconductor;Load Uo is made of the 4th capacitor and resistance being connected in parallel.
If ignoring the dead zone between each switching tube, the capacitance of each capacitor is identical, and the inductance value of each inductance is identical, the present invention
Working condition that there are four tools, specifically:
1 (t of state0<t<t1), in this condition, first switch tube S1 and third switching tube S3 conducting, second switch
S2, the 4th switching tube S4 and the 6th switching tube S6 shutdown, equivalent circuit is as shown in Fig. 2, power supply Uin and first capacitor C1 and second
Inductance L2 forming circuit, first capacitor C1 and the second inductance L2 are energized, the second capacitor C2 electric discharge, the electricity of third capacitor C3 and second
Sense L2 is energized, and the first inductance L1 discharges to load Uo, wherein the switch state of the 5th switching tube S5 is not fixed, the 5th switch
Pipe S5, according to KVL theorem, is obtained by the control of feedback voltage with maintaining the stabilization of output voltage:
Vin=Vc1+VL2+Vo (1)
Vc2=Vc3+VL2+Vo (2)
VL1=-Vo (3)
2 (t of state1<t<t2): in this condition, first switch tube S1, third switching tube S3 and the 6th switching tube S6 are led
Logical, the 4th switching tube S4 and second switch S2 shutdown, equivalent circuit is as shown in figure 3, the first inductance L1 and the second inductance L2 are same
When electric current to load Uo electric discharge, on the first inductance L1 and the second inductance L2WithLinear decline is obtained according to KVL theorem:
VL1=-Vo (4)
VL2=-Vo (5)
3 (t of state2<t<t3): in this condition, second switch S2 and the 4th switching tube S4 conducting, first switch tube
S1, third switching tube S3 and the 5th switching tube S5 shutdown, for equivalent circuit as shown in figure 4, first capacitor C1 releases energy, second is electric
Hold C2 and the first inductance L1 to be electrically charged;In energy transfer to the first inductance L1 and load Uo on third capacitor C3;Second inductance
L2 exports energy to load Uo;Electric current on first inductance L1Linear to increase, on the second inductance L2 electric currentLinear reduction,
It is obtained according to KVL theorem:
Vc1=Vc2+VL1+Vo (6)
Vc3=VL1+Vo (7)
VL2=-Vc2 (8)
4 (t of state3<t<t4): in this condition, second switch S2, the 4th switching tube S4 and the 6th switching tube S6 are led
Logical, second switch S2 and the 4th switching tube S4 shutdown, equivalent circuit is as shown in figure 5, the first inductance L1 and the second inductance L2 are same
When electric current to load Uo electric discharge, on the first inductance L1 and the second inductance L2WithLinear decline, the 4th capacitor are put to resistance
Electricity, by moment t4, circuit restarts to next period.
It is obtained according to the voltage-second balance characteristic of inductance element according to formula (2) and (3):
D(Vin-Vo-Vc1)+(D-1)Vo=0 (9)
Formula (17) is brought into formula (9), solution obtains voltage gain M of the invention are as follows:
Fig. 6 is working waveform figure of the invention, and the component voltage stress in the present invention is analyzed based on above-mentioned theory, according to
KVL theorem obtains first switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5 and
The voltage stress that six switching tube S6 are born are as follows:
The voltage stress expression formula of first capacitor C1, the second capacitor C2 and third capacitor C3 are as follows:
Design procedure of the invention are as follows:
The selection of active device: first switch tube S1, second switch S2, third switching tube S3, the 4th switching tube S4,
The pressure resistance of five switching tube S5 and the 6th switching tube S6 choose considered according to formula (12) and (13) parasitic parameter on actual circuit with
Due to voltage spikes, therefore the selection voltage stress that at least 2 times of pipes are born of each switching tube, according to theory, first switch tube
What S1, second switch S2, third switching tube S3, the 4th switching tube S4, the 5th switching tube S5 and the 6th switching tube S6 were born
Voltage stress is reduced as duty ratio increases, as shown in fig. 6, therefore consideration bears maximum voltage stress with switching tube and is
Benchmark;
The selection of capacitor: first capacitor C1, the second capacitor C2 and third capacitor C3 are played very in energy transfer process
Important role, in order to reduce the loss in transmittance process, the type of capacitor selects ceramic condenser, because ceramic condenser has more
Low series equivalent resistance, the 4th capacitor chooses electrolytic capacitor, because the capacitance of electrolytic capacitor is bigger, it is possible to reduce output voltage
Ripple;
The selection of inductance: topology chooses ring-shaped inductors magnetic core, because ring-shaped inductors are theoretically without leakage inductance, core material choosing
FERRITE CORE is taken, because ferrite has better magnetic conductivity and lower iron loss, inductor winding relative to alloy magnetic powder core
It is realized using litz wire.
According to the present invention, it is in kind corresponding circuit has been made, input voltage 48V, output voltage 1V, Fig. 7 to Figure 10
For the experimental model of topology, reach an agreement with theory analysis.
Claims (7)
1. a kind of non-isolated DC chopper circuit suitable for data center's voltage regulator module, which is characterized in that including power supply
(Uin), Charles Dixon charge pump and two staggered buck circuits;Wherein, Charles Dixon charge pump includes first switch tube (S1), second
Switching tube (S2), third switching tube (S3), the 4th switching tube (S4), first capacitor (C1), the second capacitor (C2) and third capacitor
(C3);Two staggered buck circuits include the 5th switching tube (S5), the 6th switching tube (S6), the first inductance (L1) and the second inductance
(L2);
The cathode of power supply (Uin) is grounded, the anode of power supply (Uin) through the one end of first switch tube (S1) and first capacitor (C1) and
One end of second switch (S2) is connected, the other end of second switch (S2) and the one end and second of third switching tube (S3)
One end of capacitor (C2) is connected, the other end of third switching tube (S3) and the one end of third capacitor (C3) and the 4th switching tube
(S4) one end is connected, one end of the other end of the 4th switching tube (S4) and the 5th switching tube (S5), the first inductance (L1)
The other end of one end and the second capacitor (C2) is connected, the other end of the 5th switching tube (S5) ground connection, the first inductance (L1) it is another
One end is connected with one end of one end of load (Uo) and the second inductance (L2), the other end and third capacitor of first capacitor (C1)
(C3) the other end of the other end, the second inductance (L2) and one end of the 6th switching tube (S6) is connected, the 6th switching tube (S6)
The other end ground connection, load (Uo) the other end ground connection.
2. the non-isolated DC chopper circuit according to claim 1 suitable for data center's voltage regulator module, special
Sign is, first switch tube (S1), second switch (S2), third switching tube (S3), the 4th switching tube (S4), the 5th switching tube
(S5) and the 6th switching tube (S6) is metal-oxide-semiconductor.
3. the non-isolated DC chopper circuit according to claim 1 suitable for data center's voltage regulator module, special
Sign is that load (Uo) is made of the 4th capacitor and resistance being connected in parallel.
4. the non-isolated DC chopper circuit according to claim 1 suitable for data center's voltage regulator module, special
Sign is, when first switch tube (S1) and third switching tube (S3) are connected, second switch (S2), the 4th switching tube (S4) and the
When six switching tubes (S6) turn off, power supply (Uin) and first capacitor (C1) and the second inductance (L2) are formed into a loop, first capacitor (C1)
And second inductance (L2) be energized, the second capacitor (C2) electric discharge, third capacitor (C3) and the second inductance (L2) be energized, the first electricity
Feel (L1) to discharge to load (Uo), wherein the switch state of the 5th switching tube (S5) is not fixed, and the 5th switching tube (S5) is fed back
The control of voltage, to maintain the stabilization of output voltage.
5. the non-isolated DC chopper circuit according to claim 1 suitable for data center's voltage regulator module, special
Sign is, when first switch tube (S1), third switching tube (S3) and the 6th switching tube (S6) are connected, the 4th switching tube (S4) and the
When two switching tubes (S2) turn off, the first inductance (L1) and the second inductance (L2) discharge to load (Uo) simultaneously, the first inductance (L1)
With the electric current on the second inductance (L2)WithLinear decline.
6. the non-isolated DC chopper circuit according to claim 1 suitable for data center's voltage regulator module, special
Sign is, when second switch (S2) and the 4th switching tube (S4) are connected, first switch tube (S1), third switching tube (S3) and the
When five switching tubes (S5) turn off, first capacitor (C1) releases energy, and the second capacitor (C2) and the first inductance (L1) are electrically charged;Third
In energy transfer to the first inductance (L1) and load (Uo) on capacitor (C3);Second inductance (L2) exports energy to load (Uo)
Amount;Electric current on first inductance (L1)Linear to increase, on the second inductance (L2) electric currentLinear reduction.
7. the non-isolated DC chopper circuit according to claim 3 suitable for data center's voltage regulator module, special
Sign is, when second switch (S2), the 4th switching tube (S4) and the 6th switching tube (S6) are connected, second switch (S2) and the
When four switching tubes (S4) turn off, the first inductance (L1) and the second inductance (L2) discharge to load (Uo) simultaneously, the first inductance (L1)
And the second electric current on inductance (L2)WithLinear decline, the 4th capacitor is to conductive discharge.
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CN110729888A (en) * | 2019-10-29 | 2020-01-24 | 上海南芯半导体科技有限公司 | Hybrid power converter with high voltage conversion ratio |
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CN111682752A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
CN111682757A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Non-isolated high-buck-gain DC-DC converter for data center power supply voltage regulation module |
CN112003470A (en) * | 2020-07-30 | 2020-11-27 | 苏州浪潮智能科技有限公司 | 48V-to-12V power supply for server and power supply conversion method |
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CN110729888A (en) * | 2019-10-29 | 2020-01-24 | 上海南芯半导体科技有限公司 | Hybrid power converter with high voltage conversion ratio |
CN111245236A (en) * | 2020-03-16 | 2020-06-05 | 深圳市诚芯微科技有限公司 | Step-down DC-DC converter topological structure |
CN111682752A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
CN111682757A (en) * | 2020-05-21 | 2020-09-18 | 西安交通大学 | Non-isolated high-buck-gain DC-DC converter for data center power supply voltage regulation module |
CN111682752B (en) * | 2020-05-21 | 2021-09-03 | 西安交通大学 | Isolated type high-voltage-reduction-ratio DC-DC converter without transformer |
CN111682757B (en) * | 2020-05-21 | 2021-11-19 | 西安交通大学 | Non-isolated high-voltage-reduction-gain DC-DC converter |
CN112003470A (en) * | 2020-07-30 | 2020-11-27 | 苏州浪潮智能科技有限公司 | 48V-to-12V power supply for server and power supply conversion method |
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