CN1538606A - Low voltage largecurrent modle power source - Google Patents
Low voltage largecurrent modle power source Download PDFInfo
- Publication number
- CN1538606A CN1538606A CNA031132588A CN03113258A CN1538606A CN 1538606 A CN1538606 A CN 1538606A CN A031132588 A CNA031132588 A CN A031132588A CN 03113258 A CN03113258 A CN 03113258A CN 1538606 A CN1538606 A CN 1538606A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- power tube
- power
- control
- 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Power source module includes first stage DC/DC converter unit converts variable input DC voltage to stable DC output; second stage DC/DC converter unit with fixed duty ratio; control circuit controls output from first stage DC/DC converter unit, and provides driving pulse for second stage DC/DC converter unit with fixed duty ratio. The invented power source provides input voltage in wide range. Synchronous rectified drive signal with stable amplitude can be obtained through second stage DC/DC isolating transformer with fixed duty ratio. The said drive signal can drive synchronous rectification tube directly so as to realize synchronous rectification output. The invention is applicable to power source module in low voltage and large current in high efficiency.
Description
Technical field
The present invention relates to modular power source, be specifically related to adopt the dc-dc converter modular power source.
Background technology
Along with development of electronic technology, the improving constantly of very lagre scale integrated circuit (VLSIC) integrated level, and the complexity of system is more and more higher, the direction that the demand of power supply is more and more trended towards small and exquisite, general, low pressure, high power density develops.Traditional modular power source adopts single-stage to realize the DC/DC conversion, certain advantage is arranged aspect cost, but same topology is difficult to satisfy the requirement of wide region input and output, particularly under low-voltage, high-current output situation, is difficult to obtain enough efficient.And the operating state of magnetic core is subjected to the influence of input and output voltage big, is difficult to optimal design.Generally utilance is not high, only can obtain in a certain segment limit than higher efficient; Under low-voltage, high-current output situation, adopt synchronous rectification, need complicated drive circuit, obtain stable driving pulse; Because the restriction of module volume, the valid window sectional area of single magnetic core can't satisfy the requirement of more high-power output.
Summary of the invention
The object of the present invention is to provide and to satisfy wide region input and output requirement, the higher low-voltage, high-current modular power source of efficient.
Low-voltage, high-current modular power source provided by the invention comprises: first order DC/DC converter unit, be used for variable input direct voltage, and be converted to stable direct current output; The second level fixedly accounts for control than DC/DC converter unit, and its switch periods and duty ratio are fixed; Control circuit, the output of control first order DC/DC converter unit offers second level fixed duty cycle DC/DC driving pulse simultaneously.
In such scheme, first order DC/DC converter unit can be realized by the BUCK circuit of non-isolation, specifically comprise: the drain electrode of the positive termination first power tube VT1 of input DC power, and its source electrode connects the negative electrode of first inductance L 1 and the first rectifying tube VD1; The anode A and the negative terminal A ' of the first via control signal in the grid of the first power tube VT1 and the source class difference connection control circuit; The anode of the first rectifying tube VD1 connects the ground end of input; The other end of first inductance L 1 is the output of BUCK, and the BUCK circuit of non-isolation is output as a galvanic current and presses under the effect of control circuit, and offers second level fixed duty cycle DC/DC.The second level fixedly accounts for control and can be made up of the half-bridge circuit of band self-device synchronous rectification circuit than DC/DC converter unit, specifically comprise: the drain electrode of the second power tube VT3 connects the output of BUCK circuit, the source electrode of the second power tube VT3 connects the leakage level of the 3rd power tube VT4, and the source electrode of the 3rd power tube VT4 connects the ground of input DC power; The output of the first dividing potential drop capacitor C, the 3 one termination BUCK circuit of half-bridge circuit, an end is connected with the second dividing potential drop capacitor C 4, the ground of another termination input DC power of the second dividing potential drop capacitor C 4; The 3rd dividing potential drop capacitor C 1 and the 4th dividing potential drop capacitor C 2 are in parallel with the first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4 respectively according to the needs of required appearance value.The former limit winding of isolating transformer T1, the tie point of a termination first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4, the other end are received on the tie point of the second power tube VT3 and the 3rd power tube VT4; The anode B and the negative terminal B ' of the second tunnel control signal in the grid of the second power tube VT3 and the source electrode difference connection control circuit; The anode C and the negative terminal C ' of the Third Road control signal in the grid of the 3rd power tube VT4 and the source electrode difference connection control circuit, the centre cap of isolating transformer T1 secondary winding is the ground end of output, the two ends of this self coupling winding connect the grid of the 4th power tube VT7 and the 5th power tube VT8 respectively, two other self coupling tap of symmetry connects the source electrode of the 4th power tube VT7 and the 5th power tube VT8 respectively, connects the anode of output after the drain electrode parallel connection of the 4th power tube VT7 and the 5th power tube VT8.
The present invention can also adopt another kind of scheme, in this scheme, comprises two-way Two Stages unit and control section, wherein:
Two Stages unit, every road comprises that the first order DC/DC converter unit and the second level fixedly account for control than DC/DC converter unit; First order DC/DC converter unit is the BUCK circuit of non-isolation, and second level fixed duty cycle DC/DC converter unit adopts half-bridge circuit and circuit of synchronous rectification; Control section comprises: pulse starting circuit, drive circuit, control circuit, fixedly account for control than phase shift drive circuit, the first self feeding source, the second self feeding source, overcurrent latching circuit and voltage feedback circuit; Pulse starting circuit sends periodic starting impulse to control circuit; The power supply as control circuit is pressed in the power taking from isolating transformer T1 of the first self feeding source, the second self feeding source equally also from isolating transformer T1 power taking press power supply as overcurrent latching circuit and voltage feedback circuit; Voltage feedback circuit detects output voltage and to control circuit output error conditioning signal, control circuit input pulse width modulation signal is given drive circuit, and drive circuit output drive waveforms controls for first order DC/DC converter unit to the output of first order DC/DC converter unit; Fixedly accounting for control fixedly accounts for control than phase shift drive circuit to the second level and provides driving pulse than the power tube of the half-bridge circuit in the DC/DC converter unit 12; Fixedly account for control and be connected with control circuit than phase shift drive circuit, holding frequency is synchronous; The overcurrent latching circuit is obtained current signal from output, and produces from lock signal when output current signal surpasses set point and export to control circuit.
In such scheme, first order DC/DC converter unit can be realized by the BUCK circuit of non-isolation, specifically comprise: the drain electrode of the positive termination first power tube VT1 of input DC power, and its source electrode connects the negative electrode of first inductance L 1 and the first rectifying tube VD1; The anode A and the negative terminal A ' of the first via control signal in the grid of the first power tube VT1 and the source class difference connection control circuit; The anode of the first rectifying tube VD1 connects the ground end of input; The other end of first inductance L 1 is the output of BUCK, and the BUCK circuit of non-isolation is output as a galvanic current and presses under the effect of control circuit, and offers described second level fixed duty cycle DC/DC.The second level fixedly accounts for control and can be made up of the half-bridge circuit of band self-device synchronous rectification circuit than DC/DC converter unit, specifically comprise: the drain electrode of the second power tube VT3 connects the output of BUCK circuit, the source electrode of the second power tube VT3 connects the leakage level of the 3rd power tube VT4, and the source electrode of the 3rd power tube VT4 connects the ground of input DC power; The output of the first dividing potential drop capacitor C, the 3 one termination BUCK circuit of half-bridge circuit, an end is connected with the second dividing potential drop capacitor C 4, the ground of another termination input DC power of the second dividing potential drop capacitor C 4; The 3rd dividing potential drop capacitor C 1 and the 4th dividing potential drop capacitor C 2 are in parallel with the first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4 respectively according to the needs of required appearance value; The former limit winding of isolating transformer T1, the tie point of a termination first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4, the other end are received on the tie point of the second power tube VT3 and the 3rd power tube VT4; The anode B and the negative terminal B ' of the second tunnel control signal in the grid of the second power tube VT3 and the source electrode difference connection control circuit; The anode C and the negative terminal C ' of the Third Road control signal in the grid of the 3rd power tube VT4 and the source electrode difference connection control circuit, the centre cap of isolating transformer T1 secondary winding is the ground end of output, the two ends of this self coupling winding connect the grid of the 4th power tube VT7 and the 5th power tube VT8 respectively, two other self coupling tap of symmetry connects the source electrode of the 4th power tube VT7 and the 5th power tube VT8 respectively, connects the anode of output after the drain electrode parallel connection of the 4th power tube VT7 and the 5th power tube VT8.
Overcurrent self-locking in the such scheme comprises: overcurrent latching circuit (103), control circuit (102) drives (111) the first self feeding source (107), the second self feeding source (104), isolating transformer T1.Overcurrent latching circuit (103) by different modes such as sample resistance or current transformers, is obtained output current signal; When surpassing set point, the upset of overcurrent latching circuit (103) output level, and continue to keep this state, promptly produce from lock signal; This signal is delivered to control circuit (102), control circuit (102) output continues to turn-off, make the no driving pulse output of driving (111), the Two Stages 109 of two-way parallel connection, 109 ' first order DC/DC quit work, the second level fixedly accounts for control does not so just have input voltage than DC/DC, isolating transformer T1 noenergy conversion, the first self feeding source (107) and the second self feeding source (104) that therefore are taken to isolating transformer T1 have also stopped work, so just no-output voltage of modular power source; Overcurrent latching circuit (103) is removed self-locking state because of second self feeding source (104) power down, sends starting impulse once more up to pulse starting circuit (106), repeats the aforementioned startup course of work of this modular power source device; If overcurrent latching circuit (106) detects overcurrent once more, this overcurrent protection process will repeat.
Fixedly account for control than phase shift drive circuit (100), specifically comprise: clock circuit (200), first frequency-halving circuit (201), second frequency-halving circuit (202), first drives amplifying circuit (203), and second drives amplifying circuit (204) forms.Clock circuit (200) produces same frequency, and the two-way clock that phase place is opposite is input to respectively in two two divided-frequencies (201), (202); Drive through first and second respectively then and amplify 203,204, just produced the driving pulse of two-way phase shift 90 degree, and realized the crisscross parallel of two-way power output.
Because the second level of the present invention fixed duty cycle DC/DC converter unit, its switch periods and duty ratio are fixed, and therefore help the optimal design of magnetic core and power conversion process, realize zero-pressure easily, zero stream, so efficiency of transmission is very high.Obviously by first order DC/DC converter unit,, can accomplish the voltage input of wide region as long as select suitable power device.Being also advantageous in that of Two Stages: the synchronous rectification drive signal that can obtain amplitude stability by second level fixed duty cycle DC/DC isolating transformer, can directly drive synchronous rectifier, realization synchronous rectification output can obtain very high efficient in the utilization of low-voltage, high-current modular power source.
Description of drawings
Fig. 1 is the theory diagram of first kind of scheme of the present invention.
Fig. 2 is the physical circuit figure of an embodiment of first order DC/DC and second level fixed duty cycle DC/DC converter unit in first kind of scheme of the present invention.
Fig. 3 is second kind of scheme functional-block diagram of the present invention.
Fig. 4 is the theory diagram that the fixed duty cycle phase shift in second kind of scheme of the present invention drives.
Embodiment
Fig. 1 is the theory diagram of first kind of scheme of the present invention.In Fig. 1, input voltage is through first order DC/DC conversion, the control of the controlled circuit of this grade, make its output galvanic current be pressed onto second level fixed duty cycle DC/DC converter unit, owing to adopted fixed duty cycle control, control impuls is provided by the control electricity, and output just can obtain stable direct current.
Fig. 2 is the physical circuit figure of an embodiment of first order DC/DC and second level fixed duty cycle DC/DC converter unit in first kind of scheme of the present invention.In Fig. 2, adopted the buck circuit 11 of non-isolation to realize the function of first order DC/DC converter unit, the function that adopts very high half-bridge circuit 12 of conversion efficiency and circuit of synchronous rectification 13 to realize second level fixed duty cycle DC/DC converter unit; The drive signal of synchronous rectification is directly taken from the main transformer T1 of this half-bridge circuit 12.Wherein:
The BUCK circuit 11 of non-isolation comprises: the drain electrode of the positive termination first power tube VT1 of input DC power, and its source electrode connects the negative electrode of first inductance L 1 and the first rectifying tube VD1; The anode A of the grid connection control circuit control signal of the first power tube VT1, the negative terminal A ' of source class connection control circuit control signal; The anode of the first rectifying tube VD1 connects the ground end of input; The other end of first inductance L 1 is the output of BUCK, and (the BUCK circuit 11 of non-isolation) is output as a galvanic current and presses under the effect of control circuit, and offers second level fixed duty cycle DC/DC;
Second level fixed duty cycle DC/DC is made up of the half-bridge circuit 12 of band self-device synchronous rectification circuit 13, concrete mode is as follows: the drain electrode of the second power tube VT3 connects the output of BUCK circuit 11, the source electrode of the second power tube VT3 connects the leakage level of the 3rd power tube VT4, and the source electrode of the 3rd power tube VT4 connects the ground of input DC power;
The output of the first dividing potential drop capacitor C, the 3 one termination BUCK of half-bridge circuit 12, an end is connected with the second dividing potential drop capacitor C 4, the ground of another termination input DC power of the second dividing potential drop capacitor C 4;
The 3rd dividing potential drop capacitor C 1 and the 4th dividing potential drop capacitor C 2 are in parallel with the first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4 respectively according to the needs of required appearance value;
The former limit winding of isolating transformer T1, the tie point of a termination first dividing potential drop capacitor C 3 and the second dividing potential drop capacitor C 4, the other end is received the tie point of the second power tube VT3 and the 3rd power tube VT4; The anode B and the negative terminal B ' of second control signal in the grid of the second power tube VT3 and the source electrode difference connection control circuit; The anode C of the grid of the 3rd power tube VT4 and source electrode difference connection control circuit control signal and the negative terminal C ' of control circuit control signal, the centre cap of isolating transformer T1 secondary winding is the ground end of output, the two ends of this self coupling winding connect the grid of the 4th power tube VT7 and the 5th power tube VT8 respectively, two other self coupling tap of symmetry connects the source electrode of the 4th power tube VT7 and the 5th power tube VT8 respectively, connects the anode of output after the drain electrode parallel connection of the 4th power tube VT7 and the 5th power tube VT8.
Fig. 3 is second kind of scheme block diagram of the present invention.In this scheme; the low-voltage, high-current modular power source device that has adopted two-way Two Stages 109,109 ' (by the topological form that Fig. 2 introduced) to be formed in parallel; the special half-bridge phase shift drive circuit and the step current foldback circuit that cooperate control circuit simultaneously and had have been realized a kind of low-voltage, high-current modular power source device.The Two Stages 109,109 ' of this two-way parallel connection has adopted same set of control circuit 102.The isolating transformer T1 of indication among Fig. 2 is taken from the wherein first self feeding source 107 and the second self feeding source 104 respectively, adopts different windings, gives the overcurrent latching circuit 103 and voltage feedback circuit 108 power supplies of control circuit 102, outlet side respectively; Former secondary side is isolated on electric.Its course of work is: the output voltage of this modular power source, detect and the output error conditioning signal through Voltage Feedback control circuit 108, and pass to control circuit 102; Control circuit 102 output pulse width modulation signal PWM give and drive 111, drive the A that 111 output drive waveforms are given indication among Fig. 2, A ' end, the turn-on and turn-off of control VT1; So also just controlled the output of the first order DC/DC in the Two Stages 109,109 ' of two-way parallel connection; Two Stages 109,109 ' the middle second level of two-way parallel connection fixedly accounts for control and has adopted the semi-bridge alternation of indication among Fig. 2 than DC/DC, the driving pulse B of its second power tube VT3 and the 3rd power tube VT4, B ' and C, C ', driving 100 by fixed duty cycle phase shift among Fig. 3 provides; Because this grade switch periods is fixed, its output voltage depends on the Two Stages 109 of two-way parallel connection, the output of 109 ' middle first order DC/DC fully; Therefore control circuit 102 can be realized the control to the module output voltage; The fixed duty cycle phase shift drives 100 and is connected with control circuit 102, and holding frequency is synchronous.
This modular power source starts the course of work: referring to Fig. 3, when this modular power source had input voltage, pulse starting circuit 106 was just started working, and sent periodic starting impulse.When pulse starting circuit 106 is output as when high, control circuit 102 is just started working; Fixed duty cycle phase shift driving 100 is started working earlier before control circuit 102 is started working; Two Stages 109,109 ' the middle second level that drives the two-way parallel connection fixedly accounts for control and works than DC/DC.As previously mentioned, after control circuit 102 work, first order DC/DC just has voltage to output to the second level fixedly to account for control than DC/DC in the Two Stages of two-way parallel connection 109,109 ', and module obtains voltage by second level DC/DC and exports.The first self feeding source 107 and the second self feeding source 104 of at this moment taking from second level DC/DC isolating transformer T1 (Fig. 2) produce the supply control circuit work of galvanic current source respectively, and start-up course is finished.
Current foldback circuit 103 courses of work are: overcurrent latching circuit 103, by different modes such as sample resistance or current transformers, obtain output current signal.When surpassing set point, the upset of overcurrent latching circuit 103 output levels, and continue to keep this state, promptly produce from lock signal.This signal is delivered to control circuit 102, control circuit 102 outputs continue to turn-off, driving 111 no driving pulses works to the Two Stages 109 of two-way parallel connection, 109 ' first order DC/DC, the second level fixedly accounts for control does not so just have input voltage than DC/DC, the first self feeding source 107 and the second self feeding source 104 also quit work, so just no-output voltage of modular power source.Overcurrent latching circuit 103 is removed self-locking state because of 104 power down of the second self feeding source, sends starting impulse once more up to pulse starting circuit 106, repeats this modular power source device and starts the course of work; If overcurrent latching circuit 106 detects overcurrent once more, this overcurrent protection process will repeat.With respect to the current foldback circuit of common constant-current characteristics, its advantage is: the power retraction is fast, allows output short-circuit for a long time, the reliability height; The discontinuous operation situation stable and controllable that its short circuit produces, the cycle that needs only regulating impulse start-up circuit 106 can realize; Can reduce rapidly because output short-circuit causes the loss of rectification and power device to increase; Control is simple, is easy to realize.
Fixed duty cycle phase shift of the present invention drives visible Fig. 4 of specific implementation block diagram of 100: clock circuit 200, produce same frequency, the two-way clock E that phase place is opposite and/E, be input to respectively in two two divided-frequencies 201,202.It is 90 degree that the clock/F of the clock F of first two divided-frequency, 201 outputs and 202 outputs of second two divided-frequency differs.Then F and/F through drive amplifying 203,204, just produced the Two Stages 109 that drives two-way parallel connection among Fig. 3 respectively, BB ' and CC ' (the seeing Fig. 2 for details) driving pulse of 109 ' its second level fixed duty cycle DC/DC respectively.BB ' drive signal in obvious one tunnel Two Stages 109, the BB ' phase shift in corresponding another road Two Stages 109 ' 90 degree; C in the Two Stages 109, C ' drive signal, the C in the corresponding Two Stages 109 ', C ' phase shift 90 degree, thereby realized the crisscross parallel of two-way power output.Fixed duty cycle phase shift of the present invention drives 100 can produce drive signal simultaneously to the two-way of parallel connection, make the Two Stages 109 of two-way parallel connection and 109 ' the second level fixedly account for control, produce the driving pulse of phase shift 90 degree respectively than pairing second power tube VT3 of DC/DC and the 3rd power tube VT4 (Fig. 2).Pairing breach after the two-way rectification like this, relative phase shift 90 degree, thereby play the effect of filling up mutually, greatly reduce output ripple.
Claims (8)
1, a kind of low-voltage, high-current modular power source comprises: first order DC/DC converter unit, be used for variable input direct voltage, and be converted to stable direct current output; The second level fixedly accounts for control than DC/DC converter unit, and its switch periods and duty ratio are fixed; Control circuit, the output of control first order DC/DC converter unit offers second level fixed duty cycle DC/DC driving pulse simultaneously.
2, a kind of low-voltage, high-current modular power source according to claim 1 is characterized in that, described first order DC/DC converter unit is to be realized by the BUCK circuit (11) of non-isolation, specifically comprises:
The drain electrode of positive termination first power tube (VT1) of input DC power, its source electrode connects the negative electrode of first inductance (L1) and first rectifying tube (VD1); The anode (A) of the first via control signal in the grid of first power tube (VT1) and the source class difference connection control circuit and negative terminal (A '); The anode of first rectifying tube (VD1) connects the ground end of input; The other end of first inductance (L1) is the output of BUCK, and the BUCK circuit (11) of non-isolation is output as a galvanic current and presses under the effect of control circuit, and offers described second level fixed duty cycle DC/DC.
3, a kind of low-voltage, high-current modular power source according to claim 1 and 2 is characterized in that, the described second level fixedly accounts for control to be made up of the half-bridge circuit (12) of band self-device synchronous rectification circuit (13) than DC/DC converter unit, specifically comprises;
The drain electrode of second power tube (VT3) connects the output of BUCK circuit (11), and the source electrode of second power tube (VT3) connects the leakage level of the 3rd power tube (VT4), and the source electrode of the 3rd power tube (VT4) connects the ground of input DC power;
The output of the first dividing potential drop electric capacity (C3) termination BUCK circuit (11) of half-bridge circuit (12), an end is connected the ground of another termination input DC power of the second dividing potential drop electric capacity (C4) with the second dividing potential drop electric capacity (C4); The 3rd dividing potential drop electric capacity (C1) and the 4th dividing potential drop electric capacity (C2) are in parallel with the first dividing potential drop electric capacity (C3) and the second dividing potential drop electric capacity (C4) respectively according to the needs of required appearance value;
The former limit winding of isolating transformer (T1), the tie point of a termination first dividing potential drop electric capacity (C3) and the second dividing potential drop electric capacity (C4), the other end are received on the tie point of second power tube (VT3) and the 3rd power tube (VT4); The anode (B) of the second tunnel control signal in the grid of second power tube (VT3) and the source electrode difference connection control circuit and negative terminal (B '); The anode (C) of the Third Road control signal in the grid of the 3rd power tube (VT4) and the source electrode difference connection control circuit and negative terminal (C '), the centre cap of isolating transformer (T1) secondary winding is the ground end of output, the two ends of this self coupling winding connect the grid of the 4th power tube (VT7) and the 5th power tube (VT8) respectively, two other self coupling tap of symmetry connects the source electrode of the 4th power tube (VT7) and the 5th power tube (VT8) respectively, connects the anode of output after the drain electrode parallel connection of the 4th power tube (VT7) and the 5th power tube (VT8).
4, a kind of low-voltage, high-current modular power source comprises two-way Two Stages unit (109,109 ') and control section, wherein:
Two Stages unit, every road comprises that the first order DC/DC converter unit and the second level fixedly account for control than DC/DC converter unit; The BUCK circuit (11) that described first order DC/DC converter unit is non-isolation, described second level fixed duty cycle DC/DC converter unit adopts half-bridge circuit (12) and circuit of synchronous rectification (13);
Described control section comprises: pulse starting circuit (106), drive circuit (111), control circuit (102), fixedly account for control than phase shift drive circuit (100), the first self feeding source (107), the second self feeding source (104), overcurrent latching circuit (103) and voltage feedback circuit (108); Described pulse starting circuit (106) sends periodic starting impulse to described control circuit (102); The power supply as described control circuit is pressed in the independent winding power taking from described isolating transformer (T1) of the described first self feeding source (107), and the power supply as described overcurrent latching circuit (103) and described voltage feedback circuit (108) is pressed in the power taking from described isolating transformer (T1) secondary winding of the described second self feeding source (104); Described voltage feedback circuit (108) detects output voltage and to described control circuit (102) output error conditioning signal, described control circuit input pulse width modulation signal is given described drive circuit (111), and described drive circuit (111) output drive waveforms controls for described first order DC/DC converter unit to the output of first order DC/DC converter unit; Describedly fixedly account for control and fixedly account for control than phase shift drive circuit (100) to the described second level and provide driving pulse than the power tube of the half-bridge circuit in the DC/DC converter unit (12); Describedly fixedly account for control and be connected with described control circuit (102) than phase shift drive circuit (100), holding frequency is synchronous; Described overcurrent latching circuit (103) is obtained current signal from output, and produces from lock signal when output current signal surpasses set point and export to described control circuit (102).
5, the described low-voltage, high-current modular power source of claim 4 is characterized in that, described first order DC/DC converter unit is to be realized by the BUCK circuit (11) of non-isolation, specifically comprises:
The drain electrode of positive termination first power tube (VT1) of input DC power, its source electrode connects the negative electrode of first inductance (L1) and first rectifying tube (VD1); The anode (A) of the first via control signal in the grid of first power tube (VT1) and the source class difference connection control circuit and negative terminal (A '); The anode of first rectifying tube (VD1) connects the ground end of input; The other end of first inductance (L1) is the output of BUCK, and the BUCK circuit (11) of non-isolation is output as a galvanic current and presses under the effect of control circuit, and offers described second level fixed duty cycle DC/DC.
6, the described low-voltage, high-current modular power source of claim 4 is characterized in that, the described second level fixedly accounts for control to be made up of the half-bridge circuit (12) of band self-device synchronous rectification circuit (13) than DC/DC converter unit, specifically comprises:
The drain electrode of second power tube (VT3) connects the output of BUCK circuit (11), and the source electrode of second power tube (VT3) connects the leakage level of the 3rd power tube (VT4), and the source electrode of the 3rd power tube (VT4) connects the ground of input DC power;
The output of the first dividing potential drop electric capacity (C3) termination BUCK circuit (11) of half-bridge circuit (12), an end is connected the ground of another termination input DC power of the second dividing potential drop electric capacity (C4) with the second dividing potential drop electric capacity (C4); The 3rd dividing potential drop electric capacity (C1) and the 4th dividing potential drop electric capacity (C2) are in parallel with the first dividing potential drop electric capacity (C3) and the second dividing potential drop electric capacity (C4) respectively according to the needs of required appearance value;
The former limit winding of isolating transformer (T1), the tie point of a termination first dividing potential drop electric capacity (C3) and the second dividing potential drop electric capacity (C4), the other end are received on the tie point of second power tube (VT3) and the 3rd power tube (VT4); The anode (B) of the second tunnel control signal in the grid of second power tube (VT3) and the source electrode difference connection control circuit and negative terminal (B '); The anode (C) of the Third Road control signal in the grid of the 3rd power tube (VT4) and the source electrode difference connection control circuit and negative terminal (C '), the centre cap of isolating transformer (T1) secondary winding is the ground end of output, the two ends of this self coupling winding connect the grid of the 4th power tube (VT7) and the 5th power tube (VT8) respectively, two other self coupling tap of symmetry connects the source electrode of the 4th power tube (VT7) and the 5th power tube (VT8) respectively, connects the anode of output after the drain electrode parallel connection of the 4th power tube (VT7) and the 5th power tube (VT8).
7. the described low-voltage, high-current modular power source of claim 4 is characterized in that the overcurrent self-locking comprises:
Overcurrent latching circuit (103), control circuit (102) drives (111) the first self feeding source (107), the second self feeding source (104), isolating transformer T1;
Overcurrent latching circuit (103) by different modes such as sample resistance or current transformers, is obtained output current signal; When surpassing set point, the upset of overcurrent latching circuit (103) output level, and continue to keep this state, promptly produce from lock signal; This signal is delivered to control circuit (102), control circuit (102) output continues to turn-off, make the no driving pulse output of driving (111), the Two Stages 109 of two-way parallel connection, 109 ' first order DC/DC quit work, the second level fixedly accounts for control does not so just have input voltage than DC/DC, isolating transformer T1 noenergy conversion, the first self feeding source (107) and the second self feeding source (104) that therefore are taken to isolating transformer T1 have also stopped work, so just no-output voltage of modular power source; Overcurrent latching circuit (103) is removed self-locking state because of second self feeding source (104) power down, sends starting impulse once more up to pulse starting circuit (106), repeats the aforementioned startup course of work of this modular power source device; If overcurrent latching circuit (106) detects overcurrent once more, this overcurrent protection process will repeat.
8. the described low-voltage, high-current modular power source of claim 4, it is characterized in that, describedly fixedly account for control than phase shift drive circuit (100), specifically comprise: clock circuit (200), first frequency-halving circuit (201), second frequency-halving circuit (202), first drives amplifying circuit (203), and second drives amplifying circuit (204) forms;
Clock circuit (200) produces same frequency, and the two-way clock that phase place is opposite is input to respectively in two two divided-frequencies (201), (202); Drive through first and second respectively then and amplify 203,204, just produced the driving pulse of two-way phase shift 90 degree, and realized the crisscross parallel of two-way power output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031132588A CN100392963C (en) | 2003-04-17 | 2003-04-17 | Low voltage largecurrent modle power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031132588A CN100392963C (en) | 2003-04-17 | 2003-04-17 | Low voltage largecurrent modle power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1538606A true CN1538606A (en) | 2004-10-20 |
| CN100392963C CN100392963C (en) | 2008-06-04 |
Family
ID=34320022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031132588A Expired - Lifetime CN100392963C (en) | 2003-04-17 | 2003-04-17 | Low voltage largecurrent modle power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100392963C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102458021A (en) * | 2010-10-22 | 2012-05-16 | 原景科技股份有限公司 | LED driving circuit and LED channel driving method |
| CN101834527B (en) * | 2009-03-12 | 2012-12-12 | 台达电子工业股份有限公司 | Two-stage switching power conversion circuit |
| CN103401466A (en) * | 2013-06-24 | 2013-11-20 | 华为技术有限公司 | Inversion power supply system |
| CN104600977A (en) * | 2013-10-31 | 2015-05-06 | 阳光电源股份有限公司 | Control method and control device of bidirectional DC/DC (Direct Current/Direct Current) converter cascade system |
| CN104753354A (en) * | 2013-12-31 | 2015-07-01 | 现代摩比斯株式会社 | Power conversion apparatus for vehicle and method for controlling the same |
| CN104821727A (en) * | 2015-04-24 | 2015-08-05 | 深圳市禾望电气股份有限公司 | Switch power supply suitable for high-overvoltage-grade high-altitude place |
| CN108306510A (en) * | 2017-01-13 | 2018-07-20 | 中兴通讯股份有限公司 | Prevent the anti-device and method filled of energy |
| CN109391135A (en) * | 2018-11-09 | 2019-02-26 | 华为数字技术（苏州）有限公司 | A kind of power-down retaining circuit and Switching Power Supply |
| CN110429838A (en) * | 2019-08-12 | 2019-11-08 | 黄山学院 | High power density GaN synchronous rectification POL power supply module |
| CN111446863A (en) * | 2020-04-24 | 2020-07-24 | 中国电子科技集团公司第四十三研究所 | A switching power supply synchronous rectifier circuit |
| CN107872218B (en) * | 2016-09-22 | 2021-01-26 | 联发科技（新加坡）私人有限公司 | Current mode logic circuit |
| CN113359021A (en) * | 2021-06-23 | 2021-09-07 | 深圳市锦祥自动化设备有限公司 | Static synchronous check relay and high-precision phase difference and amplitude difference judgment system |
| CN115723594A (en) * | 2021-08-31 | 2023-03-03 | 华为数字能源技术有限公司 | Transmitter, receiver, dynamic wireless power supply system and electric vehicle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998033267A2 (en) * | 1997-01-24 | 1998-07-30 | Fische, Llc | High efficiency power converter |
-
2003
- 2003-04-17 CN CNB031132588A patent/CN100392963C/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834527B (en) * | 2009-03-12 | 2012-12-12 | 台达电子工业股份有限公司 | Two-stage switching power conversion circuit |
| CN102458021A (en) * | 2010-10-22 | 2012-05-16 | 原景科技股份有限公司 | LED driving circuit and LED channel driving method |
| CN103401466A (en) * | 2013-06-24 | 2013-11-20 | 华为技术有限公司 | Inversion power supply system |
| CN103401466B (en) * | 2013-06-24 | 2015-11-25 | 华为技术有限公司 | Inverter system |
| CN104600977A (en) * | 2013-10-31 | 2015-05-06 | 阳光电源股份有限公司 | Control method and control device of bidirectional DC/DC (Direct Current/Direct Current) converter cascade system |
| CN104600977B (en) * | 2013-10-31 | 2017-03-01 | 阳光电源股份有限公司 | The control method of two-way DC/DC changer cascade system and control device |
| CN104753354A (en) * | 2013-12-31 | 2015-07-01 | 现代摩比斯株式会社 | Power conversion apparatus for vehicle and method for controlling the same |
| CN104821727A (en) * | 2015-04-24 | 2015-08-05 | 深圳市禾望电气股份有限公司 | Switch power supply suitable for high-overvoltage-grade high-altitude place |
| CN107872218B (en) * | 2016-09-22 | 2021-01-26 | 联发科技（新加坡）私人有限公司 | Current mode logic circuit |
| CN108306510A (en) * | 2017-01-13 | 2018-07-20 | 中兴通讯股份有限公司 | Prevent the anti-device and method filled of energy |
| CN109391135A (en) * | 2018-11-09 | 2019-02-26 | 华为数字技术（苏州）有限公司 | A kind of power-down retaining circuit and Switching Power Supply |
| CN110429838A (en) * | 2019-08-12 | 2019-11-08 | 黄山学院 | High power density GaN synchronous rectification POL power supply module |
| CN110429838B (en) * | 2019-08-12 | 2021-02-23 | 黄山学院 | High-power-density GaN synchronous rectification load point power supply module |
| CN111446863A (en) * | 2020-04-24 | 2020-07-24 | 中国电子科技集团公司第四十三研究所 | A switching power supply synchronous rectifier circuit |
| CN113359021A (en) * | 2021-06-23 | 2021-09-07 | 深圳市锦祥自动化设备有限公司 | Static synchronous check relay and high-precision phase difference and amplitude difference judgment system |
| CN115723594A (en) * | 2021-08-31 | 2023-03-03 | 华为数字能源技术有限公司 | Transmitter, receiver, dynamic wireless power supply system and electric vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100392963C (en) | 2008-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102545638B (en) | Crisscross parallel three level DC/DC converter and AC/DC converter | |
| CN201336757Y (en) | Multi-way constant-current power supply used for high-power LED light source | |
| CN103441680B (en) | A kind of soft switching full-bridge direct-current converter reducing circulation loss | |
| CN102299649B (en) | Supply convertor | |
| CN201766507U (en) | High power factor constant current circuit | |
| CN106505866B (en) | A kind of three Level Full Bridge DC converters | |
| CN101834541A (en) | Constant current circuit with high power factor | |
| CN109302078B (en) | DC-DC switching power supply based on synchronous rectification mode | |
| CN100392963C (en) | Low voltage largecurrent modle power source | |
| CN102638184A (en) | High-efficiency alternating current-direct current voltage converting circuit | |
| CN106787765A (en) | The system and method for realizing ultra-wide output voltage range based on LLC topologys | |
| CN107800312B (en) | A Low Output Ripple PFC Converter | |
| CN109586567A (en) | A kind of topological structure of wide input voltage range multichannel High voltage output | |
| CN115378266A (en) | Converter suitable for wide-range output voltage and control method thereof | |
| CN101521460B (en) | Multi-channel output direct current-direct-current converter | |
| CN101847936A (en) | Soft switching full-bridge direct-current converter with lag leg connected with auxiliary network in parallel | |
| CN101834527A (en) | Two-stage switching power conversion circuit | |
| CN212381122U (en) | Single-stage isolation type bidirectional DC converter | |
| CN100401628C (en) | DC/DC transformation topology circuit of high-voltage switch power supply | |
| CN2884685Y (en) | Microwave oven magnetron variable frequency power supply | |
| CN100391091C (en) | Power supply circuit and electronic device | |
| CN201312262Y (en) | High-frequency switch power supply with higher conversion efficiency | |
| CN216981796U (en) | Improved high-power high-reliability DC-DC isolation booster circuit | |
| CN113992013B (en) | Current source direct current converter and control method | |
| CN112366944B (en) | Soft switch resonance BOOST converter controlled by pulse width modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080604 |