CN102130573A - Multi-group output voltage-reduction conversion device having power-off protection function - Google Patents
Multi-group output voltage-reduction conversion device having power-off protection function Download PDFInfo
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Abstract
The invention discloses a multi-group output voltage-reduction conversion device having a power-off protection function. The multi-group output voltage-reduction conversion device comprises a main voltage-reduction converter and at least one auxiliary voltage-reduction converter which are used for providing a plurality of groups of output power, and an abnormal voltage signal generation unit. When the multi-group output voltage-reduction conversion device is switched off, the abnormal voltage signal generation unit generates a control signal pair for controlling a switching element of the voltage-reduction conversion device so as to release energy stored in the auxiliary voltage-reduction converter from an internal path of the auxiliary voltage-reduction converter or a path provided by an external operating load of the auxiliary voltage-reduction converter, and prevent the stored energy from returning to the main voltage-reduction converter and raising a main output voltage.
Description
Technical field
The present invention relates to a kind of voltage-dropping type conversion equipment, refer to a kind of many groups output buck type conversion equipment of tool shutdown protection especially.
Background technology
In the computer system application technology; because the loading demand of computer system; usually not to have only single group output; therefore; power supply unit is in order to provide the needs of many group out-put supplies; usually can use buck converter that original single group output voltage is reduced to the required voltage value, to realize the requirement of many group outputs.When power supply unit provides many groups of stable outputs, cooperate the sequential action that meets the motherboard requirement again, computer system is normally operated.But, because the born characteristic of buck converter, when shutdown, input and output institute role can exchange, making originally to become the transducer of booster type (boost) for the transducer of voltage-dropping type (buck), is the situation that the output voltage imported bounces up and cause originally.Under this situation, unusual output voltage will cause the desired sequential of computer system to make a mistake, and makes computer system normally to shut down.
Therefore; how to provide under the use of many group out-put supplies at power supply unit; design a kind of many groups output buck type conversion equipment of tool shutdown protection; when these many group output buck type conversion equipments shut down; can eliminate the problem that these main output voltages of organizing output buck type conversion equipments bounce up more effectively; solution can't normal shutdown situation, desire a big problem that overcomes and solve for the present patent application people.
Summary of the invention
In order to address the above problem, the invention provides a kind of many groups output buck type conversion equipment of tool shutdown protection.Many group output buck type conversion equipments comprise main buck converter and reach secondary buck type transducer at least, so that many group out-put supplies to be provided.Wherein, main buck converter has main output, so that the main output voltage of relative reference earth terminal to be provided.Secondary buck type transducer electrically connects main buck converter, comprises arm switch and reaches arm switch down, and have auxiliary output, so that the auxiliary output voltage of relative reference earth terminal to be provided.Many groups output buck type conversion equipment of tool shutdown protection more comprises abnormal voltage signal generation unit.
Abnormal voltage signal generation unit electrically connects the input of main buck converter, and right to produce control signal, wherein, control signal is to comprising upper arm control signal and underarm control signal.When many groups output buck type conversion equipment shut down, upper arm control signal and underarm control signal were not high potential simultaneously, went up arm switch and following arm switch to control respectively.
Whereby, control signal is to the last arm switch and following arm switch of control secondary buck type transducer, can be with the stored energy of secondary buck type transducer, discharge through the inner track of secondary buck type transducer or by the external path that service load provided of this secondary buck type transducer, and prevent that stored energy is recycled to main buck converter, and cause main output voltage to bounce up.
Reach technology, means and the effect that predetermined purpose is taked in order further to understand the present invention, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, go deep into and concrete understanding when getting one thus, yet appended accompanying drawing only provide with reference to and explanation usefulness, be not to be used for to the present invention's limitr in addition.
Description of drawings
Figure 1A is the first embodiment circuit diagram of many groups output buck type conversion equipment of tool shutdown protection of the present invention;
Figure 1B is the shutdown sequential charts that should organize output buck type conversion equipments of first embodiment of the invention more;
Fig. 2 A is the second embodiment circuit diagram of many groups output buck type conversion equipment of tool shutdown protection of the present invention;
Fig. 2 B is the shutdown sequential charts that should organize output buck type conversion equipments of second embodiment of the invention more;
Fig. 3 A is the 3rd embodiment circuit diagram of many groups output buck type conversion equipment of tool shutdown protection of the present invention; And
Fig. 3 B is the shutdown sequential charts that should organize output buck type conversion equipments of third embodiment of the invention more.
Wherein, Reference numeral
30 transformers, 40 first voltage detection units
50 second voltage detection units, 70 abnormal voltage signal generation units
80 main buck converter 802 Your Majesty's arm switches
804 main arm switch 806 main outputting inductances down
808 main output capacitance 810 auxiliary inductions
812 auxiliary capacitor Vo1 master outputs
Arm switch on 10 first buck converters 102 first
104 first times arm switch 106 first outputting inductances
108 first output capacitance Vb1, the first auxiliary output
Arm switch on 20 second buck converters 202 second
204 second times arm switch 206 second outputting inductances
208 second output capacitance Vb2, the second auxiliary output
The Su1 first upper arm control signal Sd1 first underarm control signal
The Su2 second upper arm control signal Sd2 second underarm control signal
The Ld11 first discharge path Ld12 second discharge path
Ld13 the 3rd discharge path Ld14 the 4th discharge path
Ld23 the 3rd discharge path Ld24 the 4th discharge path
Vac AC power Vb primary side voltage
Vs secondary side voltage Vt1 first critical voltage
The Vt2 second critical voltage Th holds time
Embodiment
Relevant technology contents of the present invention and detailed description, conjunction with figs. is described as follows:
See also Figure 1A and Figure 1B, be respectively the first embodiment circuit diagram of many groups output buck type conversion equipment of tool of the present invention shutdown protection and this first embodiment should many group output buck type conversion equipments the shutdown sequential charts.Should comprise a main buck converter 80 and at least one secondary buck type transducer by many group output buck type conversion equipments, in order to many group out-put supplies to be provided.In the present embodiment, be the example explanation with two groups of secondary buck type transducers.That is these many group output buck type conversion equipments comprise one first secondary buck type transducer 10 and one second secondary buck type transducer 20.This main buck converter 80 has a main output end vo 1, in order to one relative one main output voltage with reference to earth terminal (not indicating) (not indicating) to be provided.This first secondary buck type transducer 10 electrically connects this main buck converter 80, and has one first auxiliary output Vb1, in order to one first auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this first auxiliary output voltage of this first secondary buck type transducer 10.In addition, this second secondary buck type transducer 20 electrically connects this main buck converter 80, and has one second auxiliary output Vb2, in order to one second auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this second auxiliary output voltage of this second secondary buck type transducer 20.
Many groups output buck type conversion equipment of this tool shutdown protection more comprises an abnormal voltage signal generation unit 70.This abnormal voltage signal generation unit 70 produces a plurality of control signals to (not indicating).If with two groups of secondary buck types of present embodiment transducer is example, then two control signals of these abnormal voltage signal generation unit 70 generations are right.That is it is right to reaching one second control signal that this abnormal voltage signal generation unit 70 produces one first control signal.And this first control signal is to comprising one first upper arm control signal Su1 and one first underarm control signal Sd1, and this second control signal is to comprising one second upper arm control signal Su2 and one second underarm control signal Sd2.In addition, when the non-shutdown of these many group output buck type conversion equipments (during normal running), this first upper arm control signal Su1 and this first underarm control signal Sd1 are pulse width modulation (PWM) signal of current potential complementation, that is, when this first upper arm control signal Su1 is high potential, then this first underarm control signal Sd1 is an electronegative potential, and vice versa.Similarly, this second upper arm control signal Su2 and this second underarm control signal Sd2 are pulse width modulation (PWM) signal of current potential complementation.
Shown in Figure 1A, a prime transformer 30 electrically connects this main buck converter 80, in order to the usefulness as power conversion between primary side input and the secondary side output.This main buck converter 80 mainly comprises Your Majesty's arm switch 802, one main arm switch 804, one main outputting inductance 806, one main output capacitance 808, an auxiliary induction 810 and auxiliary capacitor 812 down.This first buck converter 10 mainly comprises on one first arm switch 102, one first time arm switch 104, one first outputting inductance 106 and one first output capacitance 108.This second buck converter 20 mainly comprises on one second arm switch 202, one second time arm switch 204, one second outputting inductance 206 and one second output capacitance 208.
A kind of embodiment is: one first voltage detection unit 40 electrically connects the primary side of this transformer 30, in order to detect the primary side voltage Vb of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this first voltage detection unit 40, and receives this primary side voltage Vb, in order to compare (referring to Figure 1B) with one first critical voltage (threshold voltage) Vt1.When this many group output buck type conversion equipments shutdown, an external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this primary side voltage Vb reduces gradually.When this primary side voltage Vb is lower than this first critical voltage Vt1, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are respectively electronegative potential and high potential, and these arm switch 102 open circuit (open) and this first time arm switch 104 closures (closed) on first of controlling this first secondary buck type transducer 10 respectively.
Another kind of embodiment is: one second voltage detection unit 50 electrically connects the secondary side of this transformer 30, in order to detect the secondary side voltage Vs of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this second voltage detection unit 50, and receives this secondary side voltage Vs, in order to compare (referring to Figure 1B) with one second critical voltage (threshold voltage) Vt2.When this many group output buck type conversion equipments shutdown, this external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this secondary side voltage Vs reduces gradually.When this secondary side voltage Vs is lower than this second critical voltage Vt2, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are respectively electronegative potential and high potential, and these arm switch 102 open circuit (open) and this first time arm switch 104 closures (closed) on first of controlling this first secondary buck type transducer 10 respectively.
Yet, because therefore different topology (topology) framework that switched power supply developed, does not exceed with above-mentioned two kinds of embodiment in order to the circuit as voltage detecting.
Shutdown protection operation that should many group output buck type conversion equipments, such as hereinafter detailed description it.When these many group output buck type conversion equipments shut down, energy for this first output capacitance 108 that is stored in this first buck converter 10, can stored energy be discharged through one first discharge path Ld11, and avoid the stored energy of this first output capacitance 108, be recycled to this main output end vo 1 through one the 3rd discharge path Ld13.In addition, the energy that this first secondary buck type transducer 10 is stored also can discharge by these first secondary buck type transducer, 10 external paths that service load provided (not shown) simultaneously.Be worth mentioning, this first discharge path Ld11 forms through this first output capacitance 108, this first outputting inductance 106 and this first time arm switch 104.And, the 3rd discharge path Ld13 through this first output capacitance 108, this first outputting inductance 106, this on first arm switch 102, this auxiliary induction 810, this main outputting inductance 806 and this main output capacitance 808 form.
Similarly, when these many group output buck type conversion equipments shut down, energy for this second output capacitance 208 that is stored in this second buck converter 20, can stored energy be discharged through one second discharge path Ld12, and avoid the stored energy of this second output capacitance 208, be recycled to this main output end vo 1 through one the 4th discharge path Ld14.In addition, the energy that this second secondary buck type transducer 20 is stored also can discharge by these second secondary buck type transducer, 20 external paths that service load provided (not shown) simultaneously.Be worth mentioning, this second discharge path Ld12 forms through this second output capacitance 208, this second outputting inductance 206 and this second time arm switch 204.And, the 4th discharge path Ld14 through this second output capacitance 208, this second outputting inductance 206, this on second arm switch 202, this auxiliary induction 810, this main outputting inductance 806 and this main output capacitance 808 form.
In brief, when these many group output buck type conversion equipments shut down, this control signal that this abnormal voltage signal generation unit 70 is produced is right, this that control this first secondary buck type transducer 10 be this of arm switch 102 and this first time arm switch 104 and this second secondary buck type transducer 20 arm switch 202 and this second time arm switch 204 on second on first, with the energy that this first secondary buck type transducer 10 and this second secondary buck type transducer 20 is stored, discharge through the inner track of this first secondary buck type transducer 10 and this second secondary buck type transducer 20 or through the external separately path that service load provided respectively, and prevent that stored energy is recycled to this main buck converter 80, and cause this main output voltage to bounce up.
See also Fig. 2 A and Fig. 2 B, be respectively the second embodiment circuit diagram of many groups output buck type conversion equipment of tool of the present invention shutdown protection and this second embodiment should many group output buck type conversion equipments the shutdown sequential charts.Should comprise a main buck converter 80 and at least one secondary buck type transducer by many group output buck type conversion equipments, in order to many group out-put supplies to be provided.In the present embodiment, be the example explanation with two groups of secondary buck type transducers.That is these many group output buck type conversion equipments comprise one first secondary buck type transducer 10 and one second secondary buck type transducer 20.This main buck converter 80 has a main output end vo 1, in order to one relative one main output voltage with reference to earth terminal (not indicating) (not indicating) to be provided.This first secondary buck type transducer 10 electrically connects this main buck converter 80, and has one first auxiliary output Vb1, in order to one first auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this first auxiliary output voltage of this first secondary buck type transducer 10.In addition, this second secondary buck type transducer 20 electrically connects this main buck converter 80, and has one second auxiliary output Vb2, in order to one second auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this second auxiliary output voltage of this second secondary buck type transducer 20.
Many groups output buck type conversion equipment of this tool shutdown protection more comprises an abnormal voltage signal generation unit 70, and this abnormal voltage signal generation unit 70 produces a plurality of control signals to (not indicating).If with two groups of secondary buck types of present embodiment transducer is example, then two control signals of these abnormal voltage signal generation unit 70 generations are right.That is it is right to reaching one second control signal that this abnormal voltage signal generation unit 70 produces one first control signal.And this first control signal is to comprising one first upper arm control signal Su1 and one first underarm control signal Sd1, and this second control signal is to comprising one second upper arm control signal Su2 and one second underarm control signal Sd2.In addition, when the non-shutdown of these many group output buck type conversion equipments (during normal running), this first upper arm control signal Su1 and this first underarm control signal Sd1 are pulse width modulation (PWM) signal of current potential complementation, that is, when this first upper arm control signal Su1 is high potential, then this first underarm control signal Sd1 is an electronegative potential, and vice versa.Similarly, this second upper arm control signal Su2 and this second underarm control signal Sd2 are pulse width modulation (PWM) signal of current potential complementation.
Shown in Fig. 2 A, a prime transformer 30 electrically connects this main buck converter 80, in order to the usefulness as power conversion between primary side input and the secondary side output.This main buck converter 80 mainly comprises Your Majesty's arm switch 802, one main arm switch 804, one main outputting inductance 806, one main output capacitance 808, an auxiliary induction 810 and auxiliary capacitor 812 down.This first buck converter 10 mainly comprises on one first arm switch 102, one first time arm switch 104, one first outputting inductance 106 and one first output capacitance 108.This second buck converter 20 mainly comprises on one second arm switch 202, one second time arm switch 204, one second outputting inductance 206 and one second output capacitance 208.
A kind of embodiment is: one first voltage detection unit 40 electrically connects the primary side of this transformer 30, in order to detect the primary side voltage Vb of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this first voltage detection unit 40, and receives this primary side voltage Vb voltage, in order to compare (referring to Fig. 2 B) with one first critical voltage (threshold voltage) Vt1.When this many group output buck type conversion equipments shutdown, an external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this primary side voltage Vb voltage reduces gradually.When this primary side voltage Vb voltage is lower than this first critical voltage Vt1, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are all electronegative potential, and these arm switch 102 open circuits (open) and this first time arm switch 104 open circuits (open) on first of controlling this first secondary buck type transducer 10 respectively.
Another kind of embodiment is: one second voltage detection unit 50 electrically connects the secondary side of this transformer 30, in order to detect the secondary side voltage Vs of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this second voltage detection unit 50, and receives this secondary side voltage Vs voltage, in order to compare (referring to Fig. 2 B) with one second critical voltage (threshold voltage) Vt2.When this many group output buck type conversion equipments shutdown, this external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this secondary side voltage Vs voltage reduces gradually.When this secondary side voltage Vs voltage is lower than this second critical voltage Vt2, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are all electronegative potential, and these arm switch 102 open circuits (open) and this first time arm switch 104 open circuits (open) on first of controlling this first secondary buck type transducer 10 respectively.
Yet, because therefore different topology (topology) framework that switched power supply developed, does not exceed with above-mentioned two kinds of embodiment in order to the circuit as voltage detecting.
Shutdown protection operation that should many group output buck type conversion equipments, such as hereinafter detailed description it.When these many group output buck type conversion equipments shut down, since this of this first secondary buck type transducer 10 on first arm switch 102 and this first time arm switch 104 be open circuit (open) state, therefore, energy for this first output capacitance 108 that is stored in this first buck converter 10, discharge by these first secondary buck type transducer, 10 external paths that service load provided (not indicating), and avoid the stored energy of this first output capacitance 108, be recycled to this main output end vo 1 through one the 3rd discharge path Ld23.Be worth mentioning, the 3rd discharge path Ld23 through this first output capacitance 108, this first outputting inductance 106, this on first arm switch 102, this auxiliary induction 810, this main outputting inductance 806 and this main output capacitance 808 form.
Similarly, when these many group output buck type conversion equipments shut down, since this of this second secondary buck type transducer 20 on first arm switch 202 and this first time arm switch 204 be open circuit (open) state, therefore, energy for this second output capacitance 208 that is stored in this second buck converter 20, discharge by these second secondary buck type transducer, 20 external paths that service load provided (not shown), and avoid the stored energy of this second output capacitance 208, be recycled to this main output end vo 1 through one the 4th discharge path Ld24.Be worth mentioning, the 4th discharge path Ld24 through this second output capacitance 208, this second outputting inductance 206, this on second arm switch 202, this auxiliary induction 810, this main outputting inductance 806 and this main output capacitance 808 form.
In brief, when these many group output buck type conversion equipments shut down, this control signal that this abnormal voltage signal generation unit 70 is produced is right, this that control this first secondary buck type transducer 10 be this of arm switch 102 and this first time arm switch 104 and this second secondary buck type transducer 20 arm switch 202 and this second time arm switch 204 on second on first, with the energy that this first secondary buck type transducer 10 and this second secondary buck type transducer 20 is stored, discharge through the external separately path that service load provided respectively, and prevent that stored energy is recycled to this main buck converter 80, and cause this main output voltage to bounce up.
See also Fig. 3 A and Fig. 3 B, be respectively the 3rd embodiment circuit diagram of many groups output buck type conversion equipment of tool of the present invention shutdown protection and the 3rd embodiment should many group output buck type conversion equipments the shutdown sequential charts.Should comprise a main buck converter 80 and at least one secondary buck type transducer by many group output buck type conversion equipments, in order to many group out-put supplies to be provided.In the present embodiment, be the example explanation with two groups of secondary buck type transducers.That is these many group output buck type conversion equipments comprise one first secondary buck type transducer 10 and one second secondary buck type transducer 20.This main buck converter 80 has a main output end vo 1, in order to one relative one main output voltage with reference to earth terminal (not indicating) (not indicating) to be provided.This first secondary buck type transducer 10 electrically connects this main buck converter 80, and has one first auxiliary output Vb1, in order to one first auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this first auxiliary output voltage of this first secondary buck type transducer 10.In addition, this second secondary buck type transducer 20 electrically connects this main buck converter 80, and has one second auxiliary output Vb2, in order to one second auxiliary output voltage (indicating) that is somebody's turn to do relatively with reference to earth terminal to be provided, wherein, this main output voltage of this main buck converter 80 is higher than this second auxiliary output voltage of this second secondary buck type transducer 20.
Many groups output buck type conversion equipment of this tool shutdown protection more comprises an abnormal voltage signal generation unit 70, and this abnormal voltage signal generation unit 70 produces a plurality of control signals to (not indicating).If with two groups of secondary buck types of present embodiment transducer is example, then two control signals of these abnormal voltage signal generation unit 70 generations are right.That is it is right to reaching one second control signal that this abnormal voltage signal generation unit 70 produces one first control signal.And this first control signal is to comprising one first upper arm control signal Su1 and one first underarm control signal Sd1, and this second control signal is to comprising one second upper arm control signal Su2 and one second underarm control signal Sd2.In addition, when the non-shutdown of these many group output buck type conversion equipments (during normal running), this first upper arm control signal Su1 and this first underarm control signal Sd1 are pulse width modulation (PWM) signal of current potential complementation, that is, when this first upper arm control signal Su1 is high potential, then this first underarm control signal Sd1 is an electronegative potential, and vice versa.Similarly, this second upper arm control signal Su2 and this second underarm control signal Sd2 are pulse width modulation (PWM) signal of current potential complementation.
As shown in Figure 3A, a prime transformer 30 electrically connects this main buck converter 80, in order to the usefulness as power conversion between primary side input and the secondary side output.This main buck converter 80 mainly comprises Your Majesty's arm switch 802, one main arm switch 804, one main outputting inductance 806, one main output capacitance 808, an auxiliary induction 810 and auxiliary capacitor 812 down.This first buck converter 10 mainly comprises on one first arm switch 102, one first time arm switch 104, one first outputting inductance 106 and one first output capacitance 108.This second buck converter 20 mainly comprises on one second arm switch 202, one second time arm switch 204, one second outputting inductance 206 and one second output capacitance 208.
A kind of embodiment is: one first voltage detection unit 40 electrically connects the primary side of this transformer 30, in order to detect the primary side voltage Vb of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this first voltage detection unit 40, and receives this primary side voltage Vb voltage, in order to compare (referring to Fig. 3 B) with one first critical voltage (threshold voltage) Vt1.When this many group output buck type conversion equipments shutdown, an external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this primary side voltage Vb voltage reduces gradually.When this primary side voltage Vb voltage is lower than this first critical voltage Vt1, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are respectively high potential and electronegative potential, and these arm switch 102 closures (closed) and this first time arm switch 104 open circuits (open) on first of controlling this first secondary buck type transducer 10 respectively.
Another kind of embodiment is: one second voltage detection unit 50 electrically connects the secondary side of this transformer 30, in order to detect the secondary side voltage Vs of this transformer 30.This abnormal voltage signal generation unit 70 electrically connects this second voltage detection unit 50, and receives this secondary side voltage Vs voltage, in order to compare (referring to Fig. 3 B) with one second critical voltage (threshold voltage) Vt2.When this many group output buck type conversion equipments shutdown, this external ac power source Vac stop supplies power supply because the electric capacity of system is kept voltage effects, therefore, keep the time (hold-up time) Th through one after, this secondary side voltage Vs voltage reduces gradually.When this secondary side voltage Vs voltage is lower than this second critical voltage Vt2, this first upper arm control signal Su1 that this abnormal voltage signal generation unit 70 is produced and this first underarm control signal Sd1 are respectively high potential and electronegative potential, and these arm switch 102 closures (closed) and this first time arm switch 104 open circuits (open) on first of controlling this first secondary buck type transducer 10 respectively.
Yet, because therefore different topology (topology) framework that switched power supply developed, does not exceed with above-mentioned two kinds of embodiment in order to the circuit as voltage detecting.
Shutdown protection operation that should many group output buck type conversion equipments, such as hereinafter detailed description it.When these many group output buck type conversion equipments shut down, though this of this first secondary buck type transducer 10 on first arm switch 102 be closed (closed) state, but because this first time arm switch 104 is open circuit (open) state, therefore, energy for this first output capacitance 108 that is stored in this first buck converter 10, discharge by these first secondary buck type transducer, 10 external paths that service load provided (not indicating), make the voltage of this first auxiliary output Vb1 less than the voltage of this main output end vo 1, and avoid causing this main output voltage to bounce up.
Similarly, when these many group output buck type conversion equipments shut down, though this of this second secondary buck type transducer 20 on second arm switch 202 be closed (closed) state, but because this second time arm switch 204 is open circuit (open) state, therefore, energy for this second output capacitance 108 that is stored in this second buck converter 20, discharge by these second secondary buck type transducer, 20 external paths that service load provided (not indicating), make the voltage of this second auxiliary output Vb2 less than the voltage of this main output end vo 1, and avoid causing this main output voltage to bounce up.
In brief, when these many group output buck type conversion equipments shut down, this control signal that this abnormal voltage signal generation unit 70 is produced is right, this that control this first secondary buck type transducer 10 be this of arm switch 102 and this first time arm switch 104 and this second secondary buck type transducer 20 arm switch 202 and this second time arm switch 204 on second on first, with the energy that this first secondary buck type transducer 10 and this second secondary buck type transducer 20 is stored, discharge through the external separately path that service load provided respectively, and prevent that stored energy is recycled to this main buck converter 80, and cause this main output voltage to bounce up.
In sum, the present invention has following advantage:
1, when these many group output buck type conversion equipments shuts down, control these switch elements of these secondary buck type transducers, can be with the stored energy of these secondary buck type transducers, path through being provided discharges, and prevent that stored energy is recycled to this main buck converter, and cause this main output voltage to bounce up, realization should be shut down by many group output buck type conversion equipments normally.
2, when these many group output buck type conversion equipments shut down, control these switch elements of these secondary buck type transducers, can be to prevent the stored energy of these secondary buck type transducers, be recycled to this main buck converter, and cause this main output voltage to bounce up, realization should be shut down by many group output buck type conversion equipments normally.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (6)
1. many groups output buck type conversion equipment of a tool shutdown protection is characterized in that, comprises a main buck converter and at least one secondary buck type transducer, so that many group out-put supplies to be provided; Wherein, this main buck converter has a main output, so that a main output voltage of relative reference earth terminal to be provided; This secondary buck type transducer electrically connects this main buck converter, comprises on one arm switch and arm switch once, and has an auxiliary output, so that an auxiliary output voltage of relative reference earth terminal to be provided; Should more comprise by many group output buck type conversion equipments:
One abnormal voltage signal generation unit electrically connects an input of this main buck converter, and is right to produce at least one control signal; Wherein this control signal is to comprising a upper arm control signal and a underarm control signal; When these many group output buck type conversion equipments shut down, this upper arm control signal and this underarm control signal should go up arm switch and this time arm switch for or not high potential simultaneously to control respectively;
Whereby, this control signal is to controlling upward arm switch and this time arm switch of this secondary buck type transducer, with with the stored energy of this secondary buck type transducer, discharge through the inner track of this secondary buck type transducer or by the external path that service load provided of this secondary buck type transducer, and prevent that stored energy is recycled to this main buck converter, and cause this main output voltage to bounce up.
2. many groups output buck type conversion equipment of tool shutdown protection according to claim 1; it is characterized in that; this abnormal voltage signal generation unit is lower than a charge threshold level by this input terminal voltage of this main buck converter relatively; and triggering the state that this upper arm control signal and this underarm control signal are respectively electronegative potential and high potential, control should be gone up arm switch open circuit and this underarm switch closure.
3. many groups output buck type conversion equipment of tool shutdown protection according to claim 1; it is characterized in that; abnormal voltage signal generation unit is lower than a charge threshold level by this input terminal voltage of this main buck converter relatively; and triggering the state that this upper arm control signal and this underarm control signal are all electronegative potential, control should go up arm switch and this time arm switch is all open circuit.
4. many groups output buck type conversion equipment of tool shutdown protection according to claim 1; it is characterized in that; this abnormal voltage signal generation unit is lower than a charge threshold level by this input terminal voltage of this main buck converter relatively; and trigger the state that this upper arm control signal and this underarm control signal are respectively high potential and electronegative potential, control this upper arm switch closure and this time arm switch open circuit.
5. many groups output buck type conversion equipment of tool shutdown protection according to claim 1 is characterized in that this main output voltage of this main buck converter is higher than this auxiliary output voltage of this secondary buck type transducer.
6. many groups output buck type conversion equipment of tool shutdown protection according to claim 1; it is characterized in that; when the non-shutdown of these many group output buck type conversion equipments, the pulse width modulation signal that this upper arm control signal and this underarm control signal are the current potential complementation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010001141 CN102130573B (en) | 2010-01-13 | 2010-01-13 | Multi-group output voltage-reduction conversion device having power-off protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010001141 CN102130573B (en) | 2010-01-13 | 2010-01-13 | Multi-group output voltage-reduction conversion device having power-off protection function |
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| CN102130573A true CN102130573A (en) | 2011-07-20 |
| CN102130573B CN102130573B (en) | 2013-03-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159261A (en) * | 1989-07-25 | 1992-10-27 | Superconductivity, Inc. | Superconducting energy stabilizer with charging and discharging DC-DC converters |
| WO2001011762A1 (en) * | 1999-08-06 | 2001-02-15 | Nokia Corporation | Transformer resetting |
| CN1487657A (en) * | 2003-07-09 | 2004-04-07 | 艾默生网络能源有限公司 | Novel multiplex output circuit |
| CN101026335A (en) * | 2006-02-24 | 2007-08-29 | 富士通株式会社 | Control circuit for power supply device, power supply device, and control method thereof |
| CN101505093A (en) * | 2009-03-09 | 2009-08-12 | 哈尔滨工业大学 | Multipath output electrical power suitable for space environment |
-
2010
- 2010-01-13 CN CN 201010001141 patent/CN102130573B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5159261A (en) * | 1989-07-25 | 1992-10-27 | Superconductivity, Inc. | Superconducting energy stabilizer with charging and discharging DC-DC converters |
| WO2001011762A1 (en) * | 1999-08-06 | 2001-02-15 | Nokia Corporation | Transformer resetting |
| CN1487657A (en) * | 2003-07-09 | 2004-04-07 | 艾默生网络能源有限公司 | Novel multiplex output circuit |
| CN101026335A (en) * | 2006-02-24 | 2007-08-29 | 富士通株式会社 | Control circuit for power supply device, power supply device, and control method thereof |
| CN101505093A (en) * | 2009-03-09 | 2009-08-12 | 哈尔滨工业大学 | Multipath output electrical power suitable for space environment |
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| CN102130573B (en) | 2013-03-27 |
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