CN1909349A - Voltage booster circuit with impulse-width modulation amplitude limiting controller and its controlling method - Google Patents
Voltage booster circuit with impulse-width modulation amplitude limiting controller and its controlling method Download PDFInfo
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- CN1909349A CN1909349A CN 200510084595 CN200510084595A CN1909349A CN 1909349 A CN1909349 A CN 1909349A CN 200510084595 CN200510084595 CN 200510084595 CN 200510084595 A CN200510084595 A CN 200510084595A CN 1909349 A CN1909349 A CN 1909349A
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Abstract
The invention relates to a booster circuit and relative control method, wherein said circuit comprises: a direct-current/direct-current converter for receiving one input voltage, via boosted, to output one output voltage; and one feedback control circuit with one impulse width modulate limit controller coupled to the converter to receive one input voltage feedback signal, one output voltage feedback signal and one input current feedback signal of said converter, and the controller can generate one output signal with fixed period; said output signal can control the switch of converter to boost voltage.
Description
Technical field
The present invention relates to a kind of booster circuit that boosts that is used to control, particularly a kind of booster circuit of tool one impulse-width modulation amplitude limiting controller.
Background technology
In known technology related to the present invention, a circuit diagram that is used to control the traditional booster circuit (boostcircuit) 1 that boosts as shown in Figure 1.In Fig. 1, this booster circuit comprises: a dc/dc boost converter (DC/DC boost converter) 11 and one feedback control circuit (feedbackcontrol circuit) 12, wherein this feedback control circuit 12 comprises that more a voltage/current detection device (voltage/current detector) 121 (is used to receive an input voltage feedback signal S of this dc/dc boost converter 11
Vi, an output voltage feedback signal S
VoWith an input current feedback signal S
Ii), a modulator (modulator) 123, an oscillator (oscillator) 122, a soft start controller (soft startingunit) 124 and one feedback controller (feedback controller) 125.Wherein, an input voltage vin through one boost after, become an output voltage V o, and this output voltage V o is controlled by an output signal K of this feedback controller.The change result of this booster circuit 1 its output voltage V o is to rise to a peak value P gradually from an initial value S, and then slowly drops to a stationary value Vo; Its change procedure, as shown in Figure 2.The control principle of this booster circuit 1 is as follows: at first this voltage/current detection device 121 becomes the conversion of signals that reads voltage signal and outputs to modulator 123, through with do the modulation of pulse period from the signal of oscillator 122 after, deliver to signal that feedback controller 125 and oscillator 122 and soft start controller 124 produced relatively after, export a control signal K again, keying in order to the switch Q1 that controls this booster circuit 1 produces this and boosts.
The rising waveform of relevant above-mentioned this output voltage V o drops to stable voltage Vo by initial value S to peaking P as shown in Figure 2 again.Because a traditional booster circuit 1 will make the peak of this output voltage V o rise to the P value of a crest voltage in this known technology, so selecting for use of the element of this tradition booster circuit 1, for example: this switch Q1, one diode D, an and output capacitance C1 etc., in its withstand voltage consideration, must select the higher one-level of electric pressure for use or the higher element of reliability uses, thereby cause it higher relatively on relevant manufacturing cost; And if use this tradition booster circuit 1, because of this output voltage V o will rise to a P value greater than the crest voltage of predetermined output voltage value Vo, so with regard to its required factors such as electric power consideration that additionally expends, also more uneconomical comparatively speaking.
Therefore, the inventor proposes " booster circuit of tool impulse-width modulation amplitude limiting controller and control method thereof " of the present invention in view of the shortcoming of known technology.
Summary of the invention
Main purpose of the present invention is to provide a kind of booster circuit and control method thereof of tool impulse-width modulation amplitude limiting controller, can avoid the output voltage V o of this booster circuit to rise to a P value that exceeds the crest voltage of predetermined output voltage value Vo, to save unnecessary power consumption and can reach the element of the booster circuit that makes the relatively low withstand voltage condition of apparatus to lower its total cost (containing manufacturing, storage and cost of transportation etc.).
Another main purpose of the present invention is to provide a kind of booster circuit of tool impulse-width modulation amplitude limiting controller, this circuit comprises: a DC-DC converter (DC/DC converter), be used to receive an input voltage, and through one boost after output one output voltage, an and feedback control circuit (feedback controlcircuit), tool one impulse-width modulation amplitude limiting controller (pulse-width modulation limitingcontroller), and be coupled in this transducer, in order to receive an input voltage feedback signal of this transducer, the control that one output voltage feedback signal and an input current feedback signal reach by this controller produces the output signal of one fixed cycle an of tool in view of the above, wherein this output signal produces this and boosts in order to a keying of a switch of controlling this transducer.
According to above-mentioned conception, this output signal is a pulse, when this output voltage during an initial value rises to a stationary value, this pulse tool one first wave amplitude, and after this output voltage rose to this stationary value, this pulse is tool one second wave amplitude then.
According to above-mentioned conception, this second wave amplitude is greater than this first wave amplitude.
According to above-mentioned conception, this control circuit more comprises: a voltage/current detection device (voltage/currentdetector), be coupled in this transducer and this controller, in order to receive this input voltage feedback signal, this output voltage feedback signal and this input current feedback signal also produce a voltage output signal in view of the above, one oscillator (oscillator), in order to produce a sawtooth waveforms, one modulator (modulator), be coupled in this voltage/current detection device, this controller and this oscillator, in order to produce a modulation signal, one soft start controller (soft starting unit), be coupled in this impulse-width modulation amplitude limiting controller, in order to produce a soft start control signal, an and feedback controller (feedback controller), be coupled in this oscillator, this modulator and this soft start controller are in order to produce this output signal.
According to above-mentioned conception, this impulse-width modulation amplitude limiting controller is exported one first, 1 second and 1 the 3rd respectively and is controlled signal to this voltage/current detection device, this modulator and this soft start controller, control in view of the above this voltage/current detection device, this modulator and this soft start controller at least one of them, produce this output signal.
According to above-mentioned conception, this first control signal is one first voltage clamp signal, with so that this voltage/current detection device is exported first voltage of a tool one first fixed value, this second control signal is the one-period limitation signal, with so that this one fixed cycle of modulation signal tool of this modulator output, the 3rd control signal is one second voltage clamp signal, uses so that this soft start controller is exported second voltage of a tool one second fixed value.
According to above-mentioned conception, this impulse-width modulation amplitude limiting controller more comprises: a circuit start device, be used to start this impulse-width modulation amplitude limiting controller and export an enabling signal, one first voltage clamping, be coupled in this circuit start device and this voltage/current detection device, in order to receive this enabling signal and to export this first control signal, one-period amplitude limiter, be coupled in this first voltage clamping and this modulator, in order to receive this enabling signal and to export this second control signal, and one second voltage clamping, be coupled in this cycle amplitude limiter and this soft start controller, in order to receive this enabling signal and to export the 3rd control signal.
According to above-mentioned conception, this modulator is a pulse width modulator (pulse-width modulator).
According to above-mentioned conception, this feedback controller is a NAND gate (NAND gate).
According to above-mentioned conception, this transducer is a dc/dc boost converter (DC/DC boostconverter) and a DC-DC type of voltage step-up (DC/DC buck-boost converter) both one of them.
According to above-mentioned conception, this switch is a metal oxide semiconductcor field effect transistor (MOSFET), and an output of this feedback control circuit is coupled in this transistorized grid.
Secondly main purpose of the present invention is to provide a kind of control method of booster circuit of tool impulse-width modulation amplitude limiting controller, wherein this booster circuit comprises: a DC-DC converter (DC/DCconverter), be used to receive an input voltage and through one boost after output one output voltage and a feedback control circuit (feedback control circuit), tool one impulse-width modulation amplitude limiting controller (pulse-widthmodulation limiting controller), one voltage/current detection device (voltage/current detector), one oscillator (oscillator), one modulator (modulator), one soft start controller (soft starting unit) and a feedback controller (feedback controller), and be coupled in this transducer, this method comprises the following step: (a) transmit the input voltage feedback signal by this transducer produced, one output voltage feedback signal and an input current feedback signal are to this voltage/current detection device; (b) transmit respectively produce by this controller one first, 1 second and 1 the 3rd control signal to this voltage/current detection device, this modulator and this soft start controller, control in view of the above this voltage/current detection device, this modulator and this soft start controller at least one of them; (c) transmit a voltage that is produced by this voltage/current detection device and output signal to this modulator; (d) transmit by a sawtooth waveforms that this oscillator produced to this modulator and this feedback controller; (e) transmit by a modulation signal that this modulator produced to this feedback controller; (f) transmission controls signal to this feedback controller by the soft start that this soft start controller produced; (g) transmit this transducer that outputs signal to by one fixed cycle an of tool that this feedback controller produced; And a keying of (h) controlling a switch of this transducer by this output signal, make this output voltage rise to a stationary value and reach this and boost from an initial value.
According to above-mentioned conception, this first control signal is one first voltage clamp signal, with so that this voltage/current detection device is exported first voltage of a tool one first fixed value, this second control signal is the one-period limitation signal, with so that this one fixed cycle of modulation signal tool of this modulator output, and the 3rd control signal is one second voltage clamp signal, uses so that this soft start controller is exported second voltage of a tool one second fixed value.
According to above-mentioned conception, this impulse-width modulation amplitude limiting controller more comprises: a circuit start device, be used to start this impulse-width modulation amplitude limiting controller and export an enabling signal, one first voltage clamping, be coupled in this circuit start device and this voltage/current detection device, in order to receive this enabling signal and to export this first control signal, one-period amplitude limiter, be coupled in this first voltage clamping and this modulator, in order to receive this enabling signal and to export this second control signal, and one second voltage clamping, be coupled in this cycle amplitude limiter and this soft start controller, in order to receive this enabling signal and to export the 3rd control signal.
According to above-mentioned conception, this output signal is a pulse, when this output voltage during an initial value rises to a stationary value, this pulse tool one first wave amplitude, and after this output voltage rose to this stationary value, this pulse is tool one second wave amplitude then.
According to above-mentioned conception, this second wave amplitude is greater than this first wave amplitude.
Description of drawings
Fig. 1 is the circuit diagram that shows a traditional booster circuit in the known technology;
Fig. 2 shows as the output voltage of traditional booster circuit of Fig. 1 rises to a peak value P by an initial value S and drops to the oscillogram that a stationary value Vo reaches the output signal K etc. of feedback controller corresponding with it again;
It is the circuit diagram that shows the booster circuit of first and second preferred embodiment tool one impulse-width modulation amplitude limiting controller of the present invention and dc/dc boost converter and tool one impulse-width modulation amplitude limiting controller and DC-DC type of voltage step-up respectively that Fig. 3 (a) reaches (b);
Fig. 4 shows as the output voltage of first preferred embodiment of Fig. 3 (a) rises to the oscillogram that a stationary value Vo reaches the output signal K etc. of feedback controller corresponding with it by an initial value S; And
Fig. 5 is the circuit block diagram that shows impulse-width modulation amplitude limiting controller of the present invention.
Wherein, description of reference numerals is as follows:
1: traditional booster circuit 11: dc/dc boost converter
12: feedback control circuit 121: voltage/current detection device 122: oscillator
123: modulator 124: soft start controller 125: feedback controller
2: the booster circuit 21 of the present invention's first preferred embodiment: dc/dc boost converter
22: feedback control circuit 221: the voltage/current detection device
222: impulse-width modulation amplitude limiting controller 2221: the circuit start device
Voltage clamping 2223 in 2222: the first: the cycle amplitude limiter
Voltage clamping 223 in 2224: the second: oscillator 224: modulator
225: soft start controller 226: feedback controller
3: the booster circuit of the present invention's second preferred embodiment
31: DC-DC type of voltage step-up 32: feedback control circuit
321: voltage/current detection device 322: impulse-width modulation amplitude limiting controller 323: oscillator
324: modulator 325: soft start controller 326: feedback controller
Embodiment
Shown in Fig. 3 (a), it is the circuit diagram of the booster circuit 2 of the present invention's first preferred embodiment tool impulse-width modulation amplitude limiting controller.This booster circuit 2 comprises: a dc/dc boost converter (DC/DCboost converter) 21 is used to receive an input voltage vin, and through one boost after output one output voltage V o and a feedback control circuit 22.Wherein, this feedback control circuit 22 more comprises: a voltage/current detection device (voltage/current detector) 221, one impulse-width modulation amplitude limiting controller (pulse-widthmodulation limiting controller) 222, one oscillator (oscillator) 223, one modulator (modulator) 224, one soft start controller (soft starting unit) 225 and one feedback controller (feedback controller) 226, this feedback control circuit 22 is coupled in this dc/dc boost converter 21, in order to receive an input voltage feedback signal S of this dc/dc boost converter 21
Vi, an output voltage feedback signal S
VoWith an input current feedback signal S
Ii, and pass through one of this impulse-width modulation amplitude limiting controller 222 and control, produce the output signal K of a tool one fixed cycle T (as shown in Figure 4) in view of the above.Wherein, this impulse-width modulation amplitude limiting controller 222 is exported one first control signal SC1, one second control signal SC2 and one the 3rd control signal SC3 respectively to this voltage/current detection device 221, this modulator 224 and this soft start controller 225, control in view of the above this voltage/current detection device 221, this modulator 224 and this soft start controller 225 at least one of them, produce this output signal K.This output signal K opens and closes in order to one of switch Q1 (it can be a metal oxide semiconductcor field effect transistor MOSFET) of controlling this transducer 21, produces this and boosts.In addition, this voltage/current detection device 221 is coupled in this dc/dc boost converter 21 and this impulse-width modulation amplitude limiting controller 222, in order to receive this input voltage feedback signal S
Vi, this output voltage feedback signal S
VoWith this input current feedback signal S
IiAnd producing a voltage output signal in view of the above, this oscillator 223 is then in order to produce a sawtooth waveforms.This modulator 224 is coupled in this voltage/current detection device 221, this impulse-width modulation amplitude limiting controller 222 and this oscillator 223, in order to produce a modulation signal SM.This soft start controller 225 is coupled in this impulse-width modulation amplitude limiting controller 222, in order to produce a soft start control signal (it is a pulse).226 of this feedback controllers are coupled in this oscillator 223, this modulator 224 and this soft start controller 225, in order to produce this output signal K.In addition, this feedback controller 226 is a NAND gate (NAND gate), and this modulator is a pulse width modulator (pulse-width modulator), and this output signal K is a pulse.When this output voltage V o from an initial value S rise to a stationary value Vo during, this pulse tool one first wave amplitude W1, and after this output voltage rises to this stationary value, this booster circuit 2 enters a normal operation, this pulse this moment is tool one second wave amplitude W2 then, and because of the cause of a load of this booster circuit 2, this second wave amplitude W2 will be greater than this first wave amplitude W1.This impulse-width modulation amplitude limiting controller 222 is exported one first control signal SC1, one second control signal SC2 and one the 3rd control signal SC3 respectively to this voltage/current detection device 221, this modulator 224 and this soft start controller 225, control in view of the above this voltage/current detection device 221, this modulator 224 and this soft start controller 225 at least one of them, produce this output signal K.Above-mentioned this first control signal SC1 is one first voltage clamp signal, with so that first voltage of this voltage/current detection device 221 outputs one tool one first fixed value, this second control signal SC2 is the one-period limitation signal, with so that this modulation signal SM one fixed cycle of tool of this modulator 224 outputs, the 3rd control signal SC3 is one second voltage clamp signal, uses so that second voltage of this soft start controller 225 outputs one tool one second fixed value.
Shown in Fig. 3 (b), it is the circuit diagram of the booster circuit 3 of the present invention's second preferred embodiment tool impulse-width modulation amplitude limiting controller.This booster circuit 3 comprises: a DC-DC type of voltage step-up (DC/DC buck-boost converter) 31 is used to receive an input voltage vin, and through one boost after output one output voltage V o, an and feedback control circuit 32, wherein this feedback control circuit 32 more comprises a voltage/current detection device (voltage/current detector) 321, one impulse-width modulation amplitude limiting controller (pulse-width modulation limiting controller) 322, one modulator (modulator) 324, one oscillator (oscillator) 323, one soft start controller (soft starting unit) 325 and one feedback controller (feedback controller) 326, and be coupled in this DC-DC type of voltage step-up 31, in order to receive an input voltage feedback signal SVi of this DC-DC type of voltage step-up 31, an one output voltage feedback signal SVo and an input current feedback signal SIi reach the output signal K that produces a tool one fixed cycle T (as shown in Figure 4) by a control of this impulse-width modulation amplitude limiting controller 321 in view of the above.Wherein, this output signal K produces this and boosts in order to the keying of the switch Q1 that controls this transducer 31.The booster circuit 3 of the present invention's second preferred embodiment tool impulse-width modulation amplitude limiting controller only is that with the difference of the booster circuit 2 of the present invention's first preferred embodiment tool impulse-width modulation amplitude limiting controller the booster circuit 3 of the present invention's second preferred embodiment comprises a DC-DC type of voltage step-up 31, the booster circuit 2 of the present invention's first preferred embodiment then comprises a dc/dc boost converter 21, both all can reach an input voltage vin, through one boost after, export the function of an output voltage V o; Part such as remaining circuit and operation principles, then identical.
About the booster circuit 2 of the invention described above first preferred embodiment and the booster circuit 3 of the present invention's second preferred embodiment (as Fig. 3 (a) and (b)) include an identical impulse-width modulation amplitude limiting controller (consult Fig. 3 (a) 222 and Fig. 3 (b) 322).Now this impulse-width modulation amplitude limiting controller 222 that is comprised with the booster circuit 2 of the present invention's first preferred embodiment be the example explanation as after.The circuit block diagram of one preferred embodiment of this impulse-width modulation amplitude limiting controller, as shown in Figure 5.Wherein, this impulse-width modulation amplitude limiting controller 222 further comprises: a circuit start device (circuit starter) 2221, be used to start this impulse-width modulation amplitude limiting controller 222 and export an enabling signal Str, one first voltage clamping (first voltageclamper) 2222, be coupled in this circuit start device 2221 and this voltage/current detection device 221, in order to receive this enabling signal Str and to export this first control signal SC1, one-period amplitude limiter (time periodlimiter) 2223, be coupled in this first voltage clamping 2222 and this modulator 224, in order to receive this enabling signal Str and to export this second control signal SC2; And one second voltage clamping (secondvoltage clamper) 2224, be coupled in this cycle amplitude limiter 2223 and this soft start controller 225, in order to receive this enabling signal Str and to export the 3rd control signal SC3.
The operation principles of the booster circuit 3 of the booster circuit 2 of relevant the invention described above first preferred embodiment and the present invention's second preferred embodiment (please reaching (the b)) tool that is total to referring to Fig. 3 (a), this booster circuit 2 that can this first preferred embodiment of the present invention is an example, the control method that its tool is described as after.This method comprises the following step: (a) transmit the input voltage feedback signal SVi, the output voltage feedback signal SVo that are produced by this transducer 21 and an input current feedback signal SIi to this voltage/current detection device 221; (b) transmit the one first control signal SC1, the one second control signal SC2 that are produced by this controller 222 and one the 3rd control signal SC3 respectively to this voltage/current detection device 221, this modulator 224 and this soft start controller 225, control in view of the above this voltage/current detection device 221, this modulator 224 and this soft start controller 225 at least one of them; (c) transmit a voltage that is produced by this voltage/current detection device 221 and output signal to this modulator 224; (d) transmit the sawtooth waveforms that produced by this oscillator 223 to this modulator 224 and this feedback controller 226; (e) transmit the modulation signal SM that produced by this modulator 224 to this feedback controller 226; (f) transmit a soft start that is produced by this soft start controller 225 and control signal to this feedback controller 226; (g) transmit the output signal K of a tool one fixed cycle T (as shown in Figure 4) that is produced by this feedback controller 226 to this transducer 21; And a keying of (h) controlling a switch Q1 of this transducer 21 by this output signal K, make this output voltage V o rise to a stationary value Vo and reach this and boost from an initial value S.
By above-mentioned explanation as can be known, the invention reside in booster circuit and control method thereof that a kind of tool impulse-width modulation amplitude limiting controller is provided, can avoid the output voltage V o of this booster circuit to rise to a P value that exceeds the crest voltage of predetermined output voltage value Vo, to save the element that unnecessary power consumption also can reach the booster circuit that makes the relatively low withstand voltage condition of apparatus, relatively to lower its total cost advantage of (containing manufacturing, storage and cost of transportation etc.).
So although the present invention is described in detail by the above embodiments, those of ordinary skill in the art can make various modifications, do not break away from the scope of claims protection.
Claims (10)
1. booster circuit, this circuit comprises:
One DC-DC converter is used to receive an input voltage, and through one boost after output one output voltage; And
One feedback control circuit, tool one impulse-width modulation amplitude limiting controller, and be coupled in this transducer, a control that reaches by this controller in order to an input voltage feedback signal, an output voltage feedback signal and an input current feedback signal that receives this transducer produces the output signal of one fixed cycle an of tool in view of the above
Wherein this output signal produces this and boosts in order to a keying of a switch of controlling this transducer.
2. circuit as claimed in claim 1 is characterized in that, this output signal is a pulse, when this output voltage during an initial value rises to a stationary value, this pulse tool one first wave amplitude, and after this output voltage rose to this stationary value, this pulse is tool one second wave amplitude then.
3. circuit as claimed in claim 1 is characterized in that, this control circuit more comprises:
One voltage/current detection device is coupled in this transducer and this controller, in order to receive this input voltage feedback signal, this output voltage feedback signal and this input current feedback signal and to produce a voltage output signal in view of the above;
One oscillator is in order to produce a sawtooth waveforms;
One modulator is coupled in this voltage/current detection device, this controller and this oscillator, in order to produce a modulation signal;
One soft start controller is coupled in this impulse-width modulation amplitude limiting controller, in order to produce a soft start control signal; And
One feedback controller is coupled in this oscillator, this modulator and this soft start controller, in order to produce this output signal.
4. circuit as claimed in claim 3 is characterized in that:
This impulse-width modulation amplitude limiting controller is exported one first, 1 second and 1 the 3rd respectively and is controlled signal to this voltage/current detection device, this modulator and this soft start controller, control in view of the above this voltage/current detection device, this modulator and this soft start controller at least one of them, produce this output signal;
This first control signal is one first voltage clamp signal, with so that this voltage/current detection device is exported first voltage of a tool one first fixed value, this second control signal is the one-period limitation signal, with so that this one fixed cycle of modulation signal tool of this modulator output, the 3rd control signal is one second voltage clamp signal, uses so that this soft start controller is exported second voltage of a tool one second fixed value; And/or
This impulse-width modulation amplitude limiting controller more comprises:
One circuit start device is used to start this impulse-width modulation amplitude limiting controller and exports an enabling signal;
One first voltage clamping is coupled in this circuit start device and this voltage/current detection device, in order to receive this enabling signal and to export this first control signal;
One-period amplitude limiter, be coupled in this first voltage clamping and this modulator, in order to receive this enabling signal and to export this second control signal; And
One second voltage clamping is coupled in this cycle amplitude limiter and this soft start controller, in order to receive this enabling signal and to export the 3rd control signal.
5. circuit as claimed in claim 3 is characterized in that:
This modulator is a pulse width modulator; And/or
This feedback controller is a NAND gate.
6. circuit as claimed in claim 1 is characterized in that:
This transducer is a dc/dc boost converter and a DC-DC type of voltage step-up both one of them; And/or
This switch is a metal oxide semiconductcor field effect transistor, and an output of this feedback control circuit is coupled in this transistorized grid.
7. the control method of a booster circuit, wherein this booster circuit comprises: a DC-DC converter, be used to receive an input voltage and through one boost after output one output voltage and a feedback control circuit, tool one impulse-width modulation amplitude limiting controller, a voltage/current detection device, an oscillator, a modulator, a soft start controller and a feedback controller, and be coupled in this transducer, this method comprises the following step:
(a) transmit by an input voltage feedback signal, an output voltage feedback signal and an input current feedback signal that this transducer produced to this voltage/current detection device;
(b) transmit respectively produce by this controller one first, 1 second and 1 the 3rd control signal to this voltage/current detection device, this modulator and this soft start controller, control in view of the above this voltage/current detection device, this modulator and this soft start controller at least one of them;
(c) transmit a voltage that is produced by this voltage/current detection device and output signal to this modulator;
(d) transmit by a sawtooth waveforms that this oscillator produced to this modulator and this feedback controller;
(e) transmit by a modulation signal that this modulator produced to this feedback controller;
(f) transmission controls signal to this feedback controller by the soft start that this soft start controller produced;
(g) transmit this transducer that outputs signal to by one fixed cycle an of tool that this feedback controller produced; And
(h) control a keying of a switch of this transducer by this output signal, make this output voltage rise to a stationary value and reach this and boost from an initial value.
8. method as claimed in claim 7, it is characterized in that, this first control signal is one first voltage clamp signal, with so that this voltage/current detection device is exported first voltage of a tool one first fixed value, this second control signal is the one-period limitation signal, with so that this one fixed cycle of modulation signal tool of this modulator output, and the 3rd control signal is one second voltage clamp signal, with so that this soft start controller is exported second voltage of a tool one second fixed value.
9. method as claimed in claim 7 is characterized in that, this impulse-width modulation amplitude limiting controller more comprises:
One circuit start device is used to start this impulse-width modulation amplitude limiting controller and exports an enabling signal;
One first voltage clamping is coupled in this circuit start device and this voltage/current detection device, in order to receive this enabling signal and to export this first control signal;
One-period amplitude limiter, be coupled in this first voltage clamping and this modulator, in order to receive this enabling signal and to export this second control signal; And
One second voltage clamping is coupled in this cycle amplitude limiter and this soft start controller, in order to receive this enabling signal and to export the 3rd control signal.
10. method as claimed in claim 7 is characterized in that:
This output signal is a pulse, when this output voltage during an initial value rises to a stationary value, this pulse tool one first wave amplitude, and after this output voltage rose to this stationary value, this pulse is tool one second wave amplitude then; And
This second wave amplitude is greater than this first wave amplitude.
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| CNB2005100845954A CN100421338C (en) | 2005-08-01 | 2005-08-01 | Voltage booster circuit with impulse-width modulation amplitude limiting controller and its controlling method |
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| CNB2005100845954A CN100421338C (en) | 2005-08-01 | 2005-08-01 | Voltage booster circuit with impulse-width modulation amplitude limiting controller and its controlling method |
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| CN100421338C CN100421338C (en) | 2008-09-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101566860A (en) * | 2008-04-23 | 2009-10-28 | 霍尼韦尔国际公司 | Systems and methods for producing a substantially constant output voltage in power source boost system |
| CN102801307A (en) * | 2011-05-25 | 2012-11-28 | 纬创资通股份有限公司 | Power converter and control method thereof |
| WO2017190430A1 (en) * | 2016-05-04 | 2017-11-09 | 深圳市华星光电技术有限公司 | Boost direct current-direct current converter |
| US9841627B2 (en) | 2015-09-22 | 2017-12-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Backlight module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101841238B (en) * | 2010-04-12 | 2012-11-21 | 无锡中星微电子有限公司 | Boost DC/DC converter and logic control circuit therein |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2002101647A (en) * | 2000-09-22 | 2002-04-05 | Fuji Photo Film Co Ltd | Power supply device |
| CN2650385Y (en) * | 2003-09-03 | 2004-10-20 | 亚源科技股份有限公司 | Soft-changing clamping device |
| EP1519475A1 (en) * | 2003-09-24 | 2005-03-30 | Asian Power Devices Inc. | A soft switching power converter with clamp |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101566860A (en) * | 2008-04-23 | 2009-10-28 | 霍尼韦尔国际公司 | Systems and methods for producing a substantially constant output voltage in power source boost system |
| CN102801307A (en) * | 2011-05-25 | 2012-11-28 | 纬创资通股份有限公司 | Power converter and control method thereof |
| US9841627B2 (en) | 2015-09-22 | 2017-12-12 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Backlight module |
| WO2017190430A1 (en) * | 2016-05-04 | 2017-11-09 | 深圳市华星光电技术有限公司 | Boost direct current-direct current converter |
| US10298008B2 (en) | 2016-05-04 | 2019-05-21 | Shenzhen China Star Optoelectronics Technology Co., Ltd | DC to DC boost converter |
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Assignee: Taida Electronic and Power Source (Dongguang) Co., Ltd. Assignor: Delta Optoelectronics Inc. Contract record no.: 2011990000746 Denomination of invention: Voltage booster circuit with impulse-width modulation amplitude limiting controller and its controlling method Granted publication date: 20080924 License type: Exclusive License Open date: 20070207 Record date: 20110803 |
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