CN100397744C - Power supply device with shunt control and shunt method thereof - Google Patents
Power supply device with shunt control and shunt method thereof Download PDFInfo
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- CN100397744C CN100397744C CNB2005100569386A CN200510056938A CN100397744C CN 100397744 C CN100397744 C CN 100397744C CN B2005100569386 A CNB2005100569386 A CN B2005100569386A CN 200510056938 A CN200510056938 A CN 200510056938A CN 100397744 C CN100397744 C CN 100397744C
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Abstract
The present invention relates to a power supplier with shunting control and a shunting method. The power supplier with shunting control utilizes the bus end as a shunting control interface. A power circuit supplies output voltage and output current to the output end and generates current sensing signals according to the output current; a feedback control circuit controls the power circuit according to the output of the power supplier; a shunting control unit generates and outputs bus signals to the bus end according to the current sensing signals and generates output reference signals the feedback control circuit according to reference voltage and the bus signals, so that the output of the power supplier is adjusted through the feedback control circuit. Besides, a bus communication circuit monitors the power supplier.
Description
Technical field
The present invention relates to a kind of power supply device, particularly relate to a kind of can be in parallel and a kind of power supply device and the shunt method thereof of branch stream mechanism are provided with another power supply device.
Background technology
Power supply unit is used in electronic installation and other products usually, in order to adjustable power to be provided.Seeing also shown in Figure 1ly, is the calcspar of the known power supply unit of explanation.As shown in Figure 1, it comprises unadjusted DC input voitage V
IN, power circuit 10, adjustable VD V
OAnd have resistance R
AWith R
BVoltage divider.This power supply unit more comprises feedback control circuit, and it is coupled to power circuit 10.This feedback control circuit comprises control unit 20, error amplifier 30 and reference voltage V
RVD V
OBe connected to feedback control circuit via voltage divider.Resistance R
AWith R
BBe connected in series in adjustable VD V
OAnd between the ground connection.In resistance R
AWith R
BBetween dividing point be connected to the negative terminal of error amplifier 30.Reference voltage V
RBe connected to the anode of error amplifier 30.The output of error amplifier 30 produces feedback signal and exports control unit 20 to.This feedbacks the control loop modulation this feedback signal, to control the output of this power supply unit.Galvanic current is pressed no matter the change of loading condition and input voltage, the modulation of feedback signal can make power supply unit output.Wherein power circuit 10 is not only the linear power supply supply, also can be the circuit structure of switched power supply.
Serial bus such as I
2C bus or SM bus (smart bus) are widely used in PC and its peripheral circuit, so that carry out the hardware monitoring.Fig. 2 illustrates that each device can talk to each other by bus.For example central processing unit can pass through bus, and the keying of the voltage of monitoring battery and power supply unit, even can read the parameters such as voltage, electric current, rotation speed of the fan and working temperature of power supply unit.The waveform sequential chart of bus in Fig. 3 displayed map 2.In bus, data terminal DATA is used for carry data, and clock pulse end CLK then is used to point out data (the accurate position of the logic V of data terminal DATA
DHOr V
DL) validity.All can arbitrate this bus because all are connected to the device of bus, data terminal DATA and clock pulse end CLK are a high levle when flat, and when data terminal DATA and clock pulse end CLK were low level, the expression bus was being transmitted data.
The problem of known power supply unit is and can't in parallel exports.For big electric current output and tolerant system (fault tolerance system), need power supply unit in parallel especially.In order to promote reliability, power supply unit in parallel must have the shunting function, so that share output current and the operating temperature that reduces power supply unit.
Summary of the invention
Purpose of the present invention is providing a kind of power supply device, utilizes existing bus communication interface as the flow-dividing control interface, so that any a plurality of power supply devices in parallel and have automatic shunting function.The present invention does not need extra link.
A further object of the present invention provides a kind of shunt method of power supply supply, so that a plurality of power supply devices parallel with one another are automatically adjusted output separately and had automatic shunting function.
The present invention proposes a kind of power supply device with flow-dividing control.This power supply device comprises input, output, bus end, power circuit, feedback control circuit, control unit, flow-dividing control unit and bus communication circuit.Bus end is coupled to a bus, in order to bus communication interface and flow-dividing control interface to be provided.Power circuit receives the input voltage of this input, and in order to supply output voltage and to output current to this output, wherein power circuit more produces current sensing signal according to output current.Feedback control circuit is coupled to this output, in order to the output of foundation power supply device and a reference signal and produce a feedback signal.Control unit is coupled to this power circuit and this feedback control circuit, controls this power circuit according to this feedback signal, in order to the stable output of adjusting this power supply device.The flow-dividing control unit is coupled to bus end and feedback control circuit, in order to according to this current sensing signal and a reference voltage and the output bus signal, and export reference signal according to reference voltage, bus signals and this current sensing signal, to adjust this feedback signal.The bus communication circuit is coupled to this bus end, this flow-dividing control unit and this control unit, is that the data transmitted according to this bus end are in order to the monitoring power supply feeding mechanism.
According to the described power supply device of preferred embodiment of the present invention, above-mentioned feedback control circuit comprises voltage divider and amplifier.Voltage divider is coupled to this output, in order to output voltage carried out dividing potential drop and to produce corresponding sensing voltage according to this.The negative terminal of amplifier is coupled to voltage divider to receive sensing voltage, and its anode is coupled to the flow-dividing control unit to receive reference signal, and its output is coupled to this control unit in order to the reset signal.
According to the described power supply device of preferred embodiment of the present invention, above-mentioned flow-dividing control unit comprise draw high voltage cell, draw high resistance, current generating unit, input unit, output unit and adjustment unit.Draw high voltage cell and draw high voltage according to the reference voltage generation.Drawing high resistance is coupled to and draws high between voltage cell and the bus end.Current generating unit produces corresponding first current signal and second current signal according to current sensing signal.Input unit is coupled to bus end, in order to according to drawing high voltage and bus signals produces the 3rd current signal.Output unit is coupled to bus end, in order to according to second current signal with draw high voltage and produce bus signals.Adjustment unit is coupled to input unit and current generating unit, produces and adjust reference signal in order to foundation reference voltage, the 3rd current signal and first current signal.
The present invention proposes a kind of power supply device with flow-dividing control.This power supply device comprises input, output, bus end, power circuit, feedback control circuit, control unit and flow-dividing control unit.Bus end is coupled to bus, in order to bus communication interface and flow-dividing control interface to be provided.Power circuit receives the input voltage of this input, in order to supply output voltage and to output current to this output.Feedback control circuit is coupled to this output, produces a feedback signal in order to the output of foundation power supply device.Control unit is coupled to this power circuit and this feedback control circuit, controls this power circuit according to this feedback signal.The flow-dividing control unit is coupled to power circuit, bus end and feedback control circuit, one bus signals of output bus end in order to the output current of foundation power supply device, and export reference signal according to the output current of reference voltage, bus signals and power supply device, to adjust feedback signal.
The present invention is because of adopting a plurality of power supply devices structure parallel with one another, utilize the existing bus communication interface of each power supply device as the flow-dividing control interface, to share total output current of each power supply device, therefore each power supply device can reduce output current separately, and then reduces its operating temperature.Simultaneously, because each power supply device all can detect the output state of self at any time automatically, and pass through bus end output bus signal separately according to its output state, therefore each power supply device all can automatically be adjusted its output current according to the bus signals of its bus end, and reaches the purpose of automatic shunting.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the calcspar of the known power supply unit of explanation.
Fig. 2 is in the known computer framework of explanation, and each device is by the interconnective calcspar of serial bus.
The waveform sequential chart of bus in Fig. 3 displayed map 2.
Fig. 4 is the preferred embodiment that has the power supply unit of shunting function according to the present invention's explanation.
Fig. 5 is the preferred embodiment that the flow-dividing control unit is described according to the present invention.
Fig. 6 is the preferred embodiment that current generating unit is described according to the present invention.
Fig. 7 is the preferred embodiment that input unit is described according to the present invention.
Fig. 8 is the preferred embodiment that accurate position detecting unit in the input unit is described according to the present invention.
Fig. 9 is the preferred embodiment that adjustment unit is described according to the present invention.
Figure 10 is the preferred embodiment that output unit is described according to the present invention.
Figure 11 illustrates that according to the present invention a plurality of power supply unit in parallel shares the preferred embodiment of output current.
10: power circuit 20: control unit
30: error amplifier 40: the bus communication circuit
50: flow-dividing control unit 52: buffer
53: transistor 55: operational amplifier
100: current generating unit 150: input unit
155: offset voltage 160: buffer amplifier
161: current source 200: adjustment unit
207: unity gain buffer 250: output unit
257: unity gain amplifier CLK: the clock pulse end of bus
DATA: the data terminal D of bus
I: the input data
D
0: dateout FB: feedback signal
I
1: the first current signal I
2: second current signal
I
M: the internal current I of current generating unit
O: output current
I
X: the 3rd current signal R
1: draw high resistance
R
2: input resistance R
3: adjust resistance
R
4: output resistance R
A, R
B: resistance
V
B: bus signals V
SP: bias voltage signal
V
DH, V
DL: the accurate position of logic V
I: current sensing signal
V
IN: input voltage V
M: draw high voltage
V
O: output voltage V
REF: reference signal
V
R1: reference voltage Z
O: output impedance
Embodiment
Spirit of the present invention for convenience of description will be example with common computer framework below, illustrate and need not change under original circuit framework, realize the shunting function of parallel power supply device (for example power supply unit).In following embodiment,, and do not need extra interface or pin with the control interface that uses serial bus interface (serial businterface) existing in the computer system as shunting.Haveing the knack of this skill person also can be according to spirit of the present invention, and utilizes the control interface of bus interface arranged side by side (parallel bus interface) as shunting.
Seeing also shown in Figure 4ly, is the preferred embodiment that has the power supply unit of shunting function according to the present invention explanation.This power supply unit comprises having input voltage V
INInput, have output voltage V
OThe bus end of output and the bus that is coupled to outside PC or central processing unit.This bus end comprises data terminal DATA and clock pulse end CLK, in order to bus communication interface and flow-dividing control interface to be provided.Power circuit 10 receives the input voltage V of input
IN, and the supply output voltage V
OWith output current I
OTo output.In the present embodiment, power circuit 10 is more according to output current I
OProduce corresponding current sensing signal V
I
Feedback control circuit comprises amplifier (for example error amplifier) 30 and voltage divider.This voltage divider is to utilize resistance R
AWith R
BMutually series connection is formed, and is coupled to this output, in order to output voltage V
OCarry out dividing potential drop and produce corresponding sensing voltage according to this.The reference signal V that amplifier 30 is received according to sensing voltage (being provided by voltage divider) that its negative terminal received and its anode
REF(being provided) by flow-dividing control unit 50, and produce feedback signal FB.Control unit 20 is coupled to amplifier 30 and power circuit 10, in order to foundation feedback signal FB power controlling circuit 10, and and then reaches the stable output of adjusting power supply unit.Above-mentioned reference signal V
REFBe based on a reference voltage V
R1Produce.
Flow-dividing control unit 50 is coupled to bus end (for example being coupled to the data terminal DATA of bus end at this) and feedback control circuit, in order to the output current I of foundation output
O(at this for example according to current sensing signal V
I) and reference voltage V
R1Generation and output bus signal are to data terminal DATA.Flow-dividing control unit 50 is more according to reference voltage V
R1, data terminal DATA bus signals and current sensing signal V
IAnd produce and output reference signal V
REF, so that adjust feedback signal FB.Therefore, flow-dividing control unit 50 can be adjusted the output of power supply unit via feedback control circuit and power circuit 10.
Seeing also shown in Figure 5ly, is the preferred embodiment that flow-dividing control unit 50 is described according to the present invention.Flow-dividing control unit 50 comprises and draws high voltage cell, draws high resistance R
1, current generating unit 100, input unit 150, output unit 250 and adjustment unit 200.Draw high voltage cell according to reference voltage V
R1Generation draws high voltage V
M, it comprises operational amplifier 55, resistance 56 and 57.Reference voltage V
R1Be connected to the anode of operational amplifier 55, so the output of operational amplifier 55 produces the corresponding voltage V that draws high
MDraw high resistance R
1Be coupled to and draw high between voltage cell and the bus end (for example being data terminal DATA), draw high voltage in bus end in order to high impedance to be provided at this.Current generating unit 100 is according to current sensing signal V
IAnd produce the first current signal I
1With the second current signal I
2 Input unit 150 is coupled to bus end, in order to foundation bus signals V
BWith draw high voltage V
MProduce the 3rd current signal I
XOutput unit 250 is coupled to bus end, in order to the foundation second current signal I
2With draw high voltage V
MProduce bus signals V
BAnd export bus end to.Adjustment unit 200 is coupled to input unit 150 and current generating unit 100, in order to foundation reference voltage V
R1, the 3rd current signal I
XWith the first current signal I
1Produce and adjust reference signal V
REFWhen the PC of outside or central processing unit transmitted data and give this power supply unit via the data terminal DATA of bus, flow-dividing control unit 50 was about to the input data D of data terminal DATA
IExport bus communication circuit 40 to via buffer 52.When this power supply unit desire sent data to outside PC or central processing unit via the data terminal DATA of bus, bus communication circuit 40 promptly cooperated the sequential of clock pulse end CLK of bus with dateout D
OSend the gate of transistor 53 to.Because the current potential of data terminal DATA is by drawing high resistance R
1Set high levle (at this presentation logic 0) for, therefore the dateout D that exports when desire
ODuring for logical one, only need turn-on transistor 53 potential setting of data terminal DATA can be become low level (at this presentation logic 1).
Seeing also shown in Figure 6ly, is the preferred embodiment that current generating unit 100 is described according to the present invention.As shown in Figure 6, the first current signal I
1With the second current signal I
2It is the current mirror mapping electric current I of being formed by transistor 103,104 and 105
M instituteProduce.This electric current I
MBe according to current sensing signal V
IProduce with resistance 106 by operational amplifier 101, transistor 102.Therefore, the first current signal I
1With the second current signal I
2Be corresponding to current sensing signal V
IWith output current I
O
Seeing also shown in Figure 7ly, is the preferred embodiment that input unit 150 is described according to the present invention.As shown in Figure 7, input unit 150 comprises input resistance R
2, accurate position detecting unit 170 and buffer amplifier 160.Accurate position detecting unit 170 is coupled to bus end (for example being data terminal DATA at this), in order to the bus signals V of testbus end
BBuffer amplifier 160 has the first output O/P and second output, and the anode of buffer amplifier 160 has offset voltage (offset voltage) 155.Its anode is coupled to accurate position detecting unit 170, so that receive its bias voltage signal V
SPThe negative terminal of buffer amplifier 160 is coupled to its first output O/P, and this first output O/P is more via input resistance R
2Be coupled to and draw high voltage V
MSecond output of buffer amplifier 160 is according to drawing high voltage V
M, bias voltage signal V
SP, offset voltage 155 and input resistance R
2Produce the 3rd current signal I
X
Wherein, k
1Be the current mirror ratio of transistor 168 and 169, V
OffsetIt is the magnitude of voltage of offset voltage 155.
Seeing also shown in Figure 8ly, is the preferred embodiment that accurate position detecting unit 170 is described in the input unit 150 according to the present invention.As shown in Figure 8, an accurate detecting unit 170 comprises the multiple sampling unit and gets high buffer amplifier (buffer-high amplifier).The bus signals V of multiple sampling unit sampling bus end (for example is data terminal DATA at this)
BAnd produce a plurality of sampled signals.Get high buffer amplifier and be coupled to the multiple sampling unit, decide bias voltage signal V according to voltage the higher person in each sampled signal
SPThe multiple sampling unit comprises by sample-pulse signal φ
1With φ
2The switch of being controlled 301 and 302.Be stored in electric capacity 305 and 306 respectively by switch 301 and 302 sampled signals of being taken a sample.
The sample-pulse signal generator alternately produces the first sample-pulse signal φ
1With the second sample-pulse signal φ
2The sample-pulse signal generator comprise trigger 331, with the door 332 and 333.The input that pulse signal φ is connected to trigger 331 with the input of door 332,333, and periodically produce.The output of trigger 331 is connected to and door 332,333.Export the first sample-pulse signal φ respectively with door 332,333
1With the second sample-pulse signal φ
2The anode of comparator 321 is connected to bus end, and its negative terminal is by critical voltage V
THProvide, its output produces stop signal, and is coupled to the input with door 332,333 via knock-on unit 330.Knock-on unit 330 is used for filtered noise.Signal subcritical voltage V when bus end
THThe time, stop signal is with the forbidden energy first sample-pulse signal φ
1With the second sample-pulse signal φ
2
Get high buffer amplifier and comprise amplifier 310 and 312. Amplifier 310 and 312 anode are connected to electric capacity 305 and 306 respectively.The output of amplifier 310 is coupled to the output of getting high buffer amplifier via diode 315.The output of amplifier 312 is coupled to the output of getting high buffer amplifier equally via diode 316. Amplifier 310 and 312 negative terminal are coupled to the output of getting high buffer amplifier respectively.The output of getting high buffer amplifier has the current source 319 that is coupled to earth terminal, in order to stop output bias signal V
SPTherefore, according to the sampled signal that detects, get the output output bias signal V of high buffer amplifier
SP
Seeing also shown in Figure 9ly, is the preferred embodiment that adjustment unit 200 is described according to the present invention.As shown in Figure 9, adjustment unit 200 comprises adjustment current mirror, the adjustment resistance R of being made up of transistor 201 and 202
3With unity gain buffer 207.The first current signal I
1With the 3rd current signal I
XBe connected to transistor 201.Transistor 202 is according to the first current signal I
1With the 3rd current signal I
λCurrent signal is adjusted in output.Adjust resistance R
3Be connected to transistor 202, in order to receive this adjustment current signal and to produce reference signal V
REFThe input of unity gain buffer 207 receives reference voltage V
R1, its output is coupled to the adjustment resistance R
3Reference signal V
REFCan represent as equation (2).
V
REF=V
R1+ [k
2* (l
X-l
1)] * R
3Equation (2)
Wherein, k
2It is the current mirror ratio of transistor 201 and 202.
Seeing also shown in Figure 10ly, is the preferred embodiment that output unit 250 is described according to the present invention.As shown in figure 10, output unit 250 comprises output resistance R
4, unity gain amplifier 257 and by transistor 251 and 252 current mirror outputs of being formed.Unity gain amplifier 257 has the output kenel of opener electrode (or opening drain electrode), and its output is connected to bus end (at this for example for data terminal DATA), in order to produce bus signals V
BBus signals V
BThe voltage quasi position of the high logical signal of decision bus end.The negative terminal of unity gain amplifier 257 is connected to its output, and its anode is via output resistance R
4Draw high voltage V and be coupled to
MTransistor 252 is coupled to the anode of unity gain amplifier 257.Transistor 251 receives the second current signal I
2According to the second current signal I
2And at output resistance R
4Last generation pressure drop.Therefore, according to the second current signal I
2, output resistance R
4With draw high voltage V
MAnd generation bus signals V
BBus signals V
BCan represent as equation (3).
V
B=V
M-k
3* I
2* R
4Equation (3)
Wherein, k
3It is the current mirror ratio of transistor 251 and 252.
Please refer to equation (3), we can find bus signals V
BBe output current I according to power supply unit
OAnd do modulation.Because the output of unity gain amplifier 257 is opener electrode (or opening drain electrode) patterns, so unity gain amplifier 257 can only drag down bus signals V
B, thereby bus end can be opened connection.There is not under the situation of load bus signals V
BCeiling voltage be by drawing high voltage V
MRegulate.
Seeing also shown in Figure 11ly, is according to the present invention the preferred embodiment that parallel power sources 350,360 and 370 is shared output current to be described.As shown in figure 11, by the bus signals V of bus end with each power supply unit
BCouple.Each power supply unit has output voltage V separately
O1～V
On, output current I
O1～I
OnWith output impedance R
O1～R
OnPower supply unit arbitration bus signal V with maximum output current
BArbitration bus signal V
BPower supply unit be defined as main supply, other Power Supplier is the additional feed device, the additional feed device will be followed the trail of bus signals V
BTo share output current.The 3rd current signal I of additional feed device
XBe to produce according to equation (1).Offset voltage V
OffsetDetermined initial critical value.As bus signals V
BPressure drop greater than offset voltage V
OffsetThe time, the additional feed device will begin to produce the 3rd current signal I
X, and share output current jointly with main supply.Lower bus signals V
BThe 3rd higher current signal I will be produced
XAt last, the additional feed device will reach the purpose of sharing output current by increasing its output voltage.Output voltage V
O(V for example
O1, V
O2... V
OB) be by reference signal V
REFDetermine.
Wherein, R
AWith R
BIt is respectively resistance R among Fig. 4
AWith R
BResistance value.
Equation (2) shows by the 3rd current signal I
XWith the first current signal I
1And adjustment reference signal V
REF, the first current signal I wherein
1Represent the output current I of power supply unit
OAs the 3rd current signal I
XBe higher than the first current signal I
1, reference signal V then
REFIncrease.Reference signal V
REFIncrease will cause output current I
OIncrease.At last, increasing its output current I
OAfterwards, reference signal V
REFIncrease will be restrained.By the mutual transmission bus signal of bus end V
B, the increase of the output current of additional feed device will reduce the output current of main supply.Therefore reach the purpose of sharing output current.Total output current I
OShared by all power supply units, it can be expressed as follows.
Z wherein
ORepresent total output loading.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (15)
1. power supply device with flow-dividing control is characterized in that it comprises:
One input;
One output;
One bus end is coupled to a bus, in order to bus communication interface and flow-dividing control interface to be provided;
One power circuit receives the input voltage of this input, outputs current to this output in order to supply an output voltage and, and wherein this power circuit produces a current sensing signal according to this output current;
One feedback control circuit is coupled to this output, in order to according to the output of this power supply device and a reference signal and produce a feedback signal;
One control unit is coupled to this power circuit and this feedback control circuit, controls this power circuit according to this feedback signal, in order to the stable output of adjusting this power supply device;
One flow-dividing control unit, be coupled to this power circuit, this bus end and this feedback control circuit, in order to according to this current sensing signal and a reference voltage and export a bus signals, and export this reference signal according to this reference voltage, this bus signals and this current sensing signal, to adjust this feedback signal; And
One bus communication circuit is coupled to this bus end, this flow-dividing control unit and this control unit, according to data that this bus end transmitted in order to monitor this power supply device;
Wherein, above-mentioned flow-dividing control unit comprises:
One draws high voltage cell, draws high voltage in order to produce one according to this reference voltage;
One draws high resistance, is coupled to this and draws high between voltage cell and this bus end;
One current generating unit is in order to produce corresponding one first current signal and one second current signal according to this current sensing signal;
One input unit is coupled to this bus end, produces one the 3rd current signal in order to draw high voltage and this bus signals according to this;
One output unit is coupled to this bus end, produces this bus signals in order to draw high voltage according to this second current signal and this; And
One adjustment unit is coupled to this input unit and this current generating unit, in order to produce and to adjust this reference signal according to this reference voltage, the 3rd current signal and this first current signal.
2. power supply device according to claim 1 is characterized in that wherein said feedback control circuit comprises:
One voltage divider is coupled to this output, in order to this output voltage carried out dividing potential drop and to produce a corresponding sensing voltage according to this; And
One amplifier, its negative terminal are coupled to this voltage divider to receive this sensing voltage, and its anode is coupled to this flow-dividing control unit to receive this reference signal, and its output is coupled to this control unit in order to export this feedback signal.
3. power supply device according to claim 1 is characterized in that wherein said input unit comprises:
One input resistance, its first end connects this and draws high voltage cell;
Surely the position detecting unit is coupled to this bus end, detects this bus signals of this bus end, in order to export a bias voltage signal; And
One buffer amplifier, its anode has an offset voltage, and be coupled to this standard position detecting unit to receive this bias voltage signal, the negative terminal of this buffer amplifier is coupled to second end of its first output and this input resistance, and second output of this buffer amplifier draws high voltage, this bias voltage signal, this offset voltage and this input resistance according to this and produces the 3rd current signal.
4. power supply device according to claim 3 is characterized in that wherein said accurate position detecting unit comprises:
One multiple sampling unit in order to the high levle of this bus signals of this bus end of taking a sample, and produces a plurality of sampled signals; And
One gets high buffer amplifier, is coupled to this multiple sampling unit, in order to voltage soprano in the above-mentioned sampled signal of foundation, and determines this bias voltage signal.
5. power supply device according to claim 1 is characterized in that wherein said output unit comprises:
One output resistance, its first end is connected to this and draws high voltage cell;
One unity gain amplifier, its anode is coupled to second end of this output resistance, its output connects the negative terminal of this bus end and this unity gain amplifier, and in order to produce this bus signals, wherein the output of this unity gain amplifier is the opener electrode or opens the kenel of drain electrode; And
One current mirror output is coupled to the anode of this unity gain amplifier, in order to produce pressure drop according to this second current signal on this output resistance;
Wherein this bus signals be according to this output resistance, this draws high voltage and this second current signal produces.
6. power supply device according to claim 1 is characterized in that wherein said adjustment unit comprises:
One adjusts current mirror, adjusts current signal in order to produce one according to the 3rd current signal and this first current signal;
One adjusts resistance, and its first end is coupled to this adjustment current mirror, receives this adjustment current signal, in order to produce this reference signal; And
One unity gain buffer, its input receives this reference voltage, and its output is coupled to second end of this adjustment resistance.
7. power supply device according to claim 1 is characterized in that wherein said bus is a serial bus.
8. power supply device according to claim 1 is characterized in that it is a power supply unit.
9. power supply device with flow-dividing control is characterized in that it comprises:
One input;
One output;
One bus end is coupled to a bus, in order to bus communication interface and flow-dividing control interface to be provided;
One power circuit receives the input voltage of this input, outputs current to this output in order to supply an output voltage and;
One feedback control circuit is coupled to this output, in order to produce a feedback signal according to the output of this power supply device;
One control unit is coupled to this power circuit and this feedback control circuit, controls this power circuit according to this feedback signal; And
One flow-dividing control unit, be coupled to this power circuit, this bus end and this feedback control circuit, in order to export a bus signals of this bus end according to this output current of this power supply device, and export a reference signal according to this output current of a reference voltage, this bus signals and this power supply device, to adjust this feedback signal, this flow-dividing control unit comprises:
One draws high voltage cell, draws high voltage in order to produce one according to this reference voltage;
One draws high resistance, is coupled to this and draws high between voltage cell and this bus end;
One input unit is coupled to this bus end, produces one the 3rd current signal in order to draw high voltage and this bus signals according to this;
One output unit is coupled to this bus end, produces this bus signals in order to draw high voltage according to this output current of this power supply device and this; And
One adjustment unit is coupled to this input unit, produces and adjust this reference signal in order to this output current according to this reference voltage, the 3rd current signal and this power supply device.
10. power supply device according to claim 9 is characterized in that wherein said feedback control circuit comprises:
One voltage divider is coupled to this output, in order to this output voltage carried out dividing potential drop and to produce a corresponding sensing voltage according to this; And
One amplifier, its negative terminal are coupled to this voltage divider to receive this sensing voltage, and its anode is coupled to this flow-dividing control unit to receive this reference signal, and its output is coupled to this control unit in order to export this feedback signal.
11. power supply device according to claim 9 is characterized in that wherein said input unit comprises:
One input resistance, its first end connects this and draws high voltage cell;
Surely the position detecting unit is coupled to this bus end, detects this bus signals of this bus end, in order to export a bias voltage signal; And
One buffer amplifier, its anode has an offset voltage, and be coupled to this standard position detecting unit to receive this bias voltage signal, the negative terminal of this buffer amplifier is coupled to second end of its first output and this input resistance, and second output of this buffer amplifier draws high voltage, this bias voltage signal, this offset voltage and this input resistance according to this and produces the 3rd current signal.
12. power supply device according to claim 11 is characterized in that wherein said accurate position detecting unit comprises:
One multiple sampling unit in order to the high levle of this bus signals of this bus end of taking a sample, and produces a plurality of sampled signals; And
One gets high buffer amplifier, is coupled to this multiple sampling unit, in order to voltage soprano in the above-mentioned sampled signal of foundation, and determines this bias voltage signal.
13. power supply device according to claim 9 is characterized in that wherein said output unit comprises:
One output resistance, its first end is connected to this and draws high voltage cell;
One unity gain amplifier, its anode is coupled to second end of this output resistance, its output connects the negative terminal of this bus end and this unity gain amplifier, and in order to produce this bus signals, wherein the output of this unity gain amplifier is the opener electrode or opens the kenel of drain electrode; And
One current mirror output is coupled to the anode of this unity gain amplifier, produces pressure drop in order to this output current according to this power supply device on this output resistance;
Wherein this bus signals is to produce according to this output resistance, this this output current that draws high voltage and this power supply device.
14. power supply device according to claim 9 is characterized in that wherein said adjustment unit comprises:
One adjusts current mirror, produces one in order to this output current according to the 3rd current signal and this power supply device and adjusts current signal;
One adjusts resistance, and its first end is coupled to this adjustment current mirror, receives this adjustment current signal, in order to produce this reference signal; And
One unity gain buffer, its input receives this reference voltage, and its output is coupled to second end of this adjustment resistance.
15. power supply device according to claim 9 is characterized in that it is a power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100569386A CN100397744C (en) | 2005-03-23 | 2005-03-23 | Power supply device with shunt control and shunt method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100569386A CN100397744C (en) | 2005-03-23 | 2005-03-23 | Power supply device with shunt control and shunt method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1838501A CN1838501A (en) | 2006-09-27 |
| CN100397744C true CN100397744C (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100569386A Expired - Fee Related CN100397744C (en) | 2005-03-23 | 2005-03-23 | Power supply device with shunt control and shunt method thereof |
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| Country | Link |
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| CN (1) | CN100397744C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090152943A1 (en) * | 2007-12-17 | 2009-06-18 | Wael William Diab | Method and system for vehicular power distribution utilizing power over ethernet |
| CN105527861A (en) * | 2014-09-28 | 2016-04-27 | 德玛凯股份有限公司 | Laser energy stable output control system and control method for cosmetic medical instrument |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07219651A (en) * | 1994-02-08 | 1995-08-18 | Hitachi Ltd | Current balance circuit |
| JP2000224846A (en) * | 1999-02-01 | 2000-08-11 | Nec Gumma Ltd | Power device |
| CN1424796A (en) * | 2001-12-13 | 2003-06-18 | 麦格尼特公司 | Supply method and circuit for current shared modules |
| JP2004357465A (en) * | 2003-05-30 | 2004-12-16 | Fujitsu Access Ltd | Power supply |
| CN1581631A (en) * | 2003-07-30 | 2005-02-16 | 飞瑞股份有限公司 | Alternating current output parallel power supply system and its equalized current control method |
-
2005
- 2005-03-23 CN CNB2005100569386A patent/CN100397744C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07219651A (en) * | 1994-02-08 | 1995-08-18 | Hitachi Ltd | Current balance circuit |
| JP2000224846A (en) * | 1999-02-01 | 2000-08-11 | Nec Gumma Ltd | Power device |
| CN1424796A (en) * | 2001-12-13 | 2003-06-18 | 麦格尼特公司 | Supply method and circuit for current shared modules |
| JP2004357465A (en) * | 2003-05-30 | 2004-12-16 | Fujitsu Access Ltd | Power supply |
| CN1581631A (en) * | 2003-07-30 | 2005-02-16 | 飞瑞股份有限公司 | Alternating current output parallel power supply system and its equalized current control method |
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| Publication number | Publication date |
|---|---|
| CN1838501A (en) | 2006-09-27 |
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