CN112188677A - Drive power supply circuit with high-power and high-current output - Google Patents
Drive power supply circuit with high-power and high-current output Download PDFInfo
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- CN112188677A CN112188677A CN202011200754.3A CN202011200754A CN112188677A CN 112188677 A CN112188677 A CN 112188677A CN 202011200754 A CN202011200754 A CN 202011200754A CN 112188677 A CN112188677 A CN 112188677A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
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Abstract
The invention discloses a high-power large-current output driving power supply circuit.A mains supply outputs direct current pulse voltage through an EMI circuit and a rectifying and filtering circuit, the direct current pulse voltage outputs boosted direct current voltage after correcting a power factor through a PFC booster circuit, the direct current voltage is output from a first transformer and a second transformer, the output of a voltage transformation circuit outputs load working voltage to a load through an output synchronous rectifying circuit, a PWM (pulse width modulation) circuit controls the on-off of a main primary side loop of the voltage transformation circuit through a switching tube, and a secondary primary side loop of the voltage transformation circuit provides starting voltage for the PWM circuit; the constant-current constant-voltage loop collects current and voltage of a load loop in the output synchronous rectification circuit and feeds the current and voltage back to the PWM circuit through the signal feedback circuit, and the PWM circuit controls the output of the voltage transformation circuit and the output synchronous rectification circuit according to the feedback. The invention has simple circuit, reliable performance and wide applicability. The ultra-low safety low voltage is safer.
Description
Technical Field
The invention relates to the technical field of driving power supply circuits, in particular to a driving power supply circuit with high-power and high-current output.
Background
When the output overload phenomenon appears in the drive circuit of the current LED drive circuit, the drive circuit still keeps the voltage output due to the lack of the protection circuit, and the potential safety hazard of the circuit is easily caused. Especially for a high-power large-current driving power supply, the requirements for safety and stability are higher, and the conventional driving power supply cannot meet the requirements at present.
Disclosure of Invention
The present invention provides a driving power circuit with high power and large current output to overcome the above-mentioned shortcomings in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a high-power large-current output driving power supply circuit comprises an alternating current interface, an EMI circuit, a rectifying and filtering circuit, a PFC booster circuit, a PWM (pulse width modulation) circuit, a voltage transformation circuit, an output synchronous rectifying circuit, a signal feedback circuit and a constant-current and constant-voltage loop; the transformation circuit comprises a first transformer and a second transformer which are connected in parallel; the commercial power outputs direct current pulse voltage VIN + through an EMI circuit and a rectifying filter circuit, the direct current pulse voltage VIN + outputs boosted direct current voltage HV after a PFC booster circuit corrects a power factor, the direct current voltage HV is output from a first transformer and a second transformer, the output of a voltage transformation circuit outputs load working voltage to a load through an output synchronous rectifying circuit, a PWM (pulse-width modulation) circuit controls the on-off of a main primary side loop of the voltage transformation circuit through a switching tube Q4, and a secondary primary side loop of the voltage transformation circuit provides starting voltage for the PWM circuit; the constant-current constant-voltage loop collects current and voltage of a load loop in the output synchronous rectification circuit and feeds the current and voltage back to the PWM circuit through the signal feedback circuit, and the PWM circuit controls the output of the voltage transformation circuit and the output synchronous rectification circuit according to the feedback.
In the above technical solution, the constant current and constant voltage loop includes a control chip U5, a current collecting port and a voltage collecting port of the control chip U5 are electrically connected to the output synchronous rectification circuit, respectively, and a feedback end of the control chip U5 is electrically connected to an input end of the signal feedback circuit.
In the above technical solution, the output synchronous rectification circuit includes a synchronous rectification chip U4 and a switching tube Q5, a control end of the switching tube Q5 is electrically connected to a control output end of the synchronous rectification chip U4, and an input end of the switching tube Q5 is electrically connected to a common output end of the first transformer and the second transformer.
In the above technical solution, the output synchronous rectification circuit further includes a plurality of polar capacitors and a common mode inductor LF 5.
In the above technical solution, a connection terminal VSTART is provided in the EMI circuit and electrically connected to the start terminal of the control chip U2 of the PWM pulse width modulation circuit.
In the above technical solution, the PFC boost circuit includes a PFC chip U1, an inductor T1 and a switching tube Q1, one input end of the inductor T1 is electrically connected to a dc pulse voltage VIN +, the other input end is electrically connected to an output end of the PFC chip U1, the dc pulse voltage VIN + is electrically connected to an input end of the PFC chip U1, a control end of the switching tube Q1 is electrically connected to a control output end of the PFC chip U1, and an output end of the switching tube Q1 is electrically connected to a control end of the PFC chip U1; one path of the output end of the inductor T1 is grounded, and the other path of the output end is connected with the diode D2 and the magnetic bead FB in series and then outputs the direct-current voltage HV; the PWM pulse width modulation circuit provides a starting voltage PFC VCC to the PFC chip U1, and the PFC chip U1 adjusts the dynamic response of the PFC chip U1 according to the starting voltage PFC VCC through the conduction of the switching tube Q3.
In the above technical solution, the MULT pin of the PFC chip U1 is electrically connected to the control terminal of the switching tube Q2, the input terminal of the switching tube Q2 is electrically connected to the PFC VCC, the switching tube Q2 is electrically connected to the control terminal of the switching tube Q3 after being connected in series to the pull-up resistor, the input terminal of the switching tube Q3 is electrically connected to the INV pin of the PFC chip U1, and the COMP pin of the PFC chip U1 is electrically connected to the INV pin after being connected in series to the resistor R4 and the capacitor C7.
In the above technical scheme, the signal feedback circuit includes an optocoupler emitting end U3A and an optocoupler receiving end U3B, the optocoupler emitting end U3A is powered by an output synchronous rectification circuit and is electrically connected with the output end of the constant current and constant voltage loop, and the optocoupler receiving end U3B is electrically connected with the feedback end of the PWM pulse width modulation circuit.
The invention has the beneficial effects that:
1. the circuit is simple, the performance is reliable, and the applicability is wide.
2. The ultra-low safety low voltage is safer.
3. The circuit scheme of utilizing the shunt output of the transformer parallel mode to solve the heavy current output is characterized in that the parallel transformers T2 and T3 share the heat dissipation at the same time, and the reliability of the circuit is improved.
4. The high-power-consumption high-voltage power supply has the characteristics of low temperature rise, excellent EMI (electro-magnetic interference), good dynamic response, no stroboflash, high output voltage precision, good linear regulation rate and load regulation rate and stable thermal state output.
Drawings
Fig. 1 is a schematic diagram of the overall circuit principle of the present invention.
Fig. 2 is a schematic circuit diagram of an EMI circuit of the present invention.
Fig. 3 is a schematic circuit diagram of the rectifying and filtering circuit of the present invention.
Fig. 4 is a schematic circuit diagram of the PFC boost circuit of the present invention.
Fig. 5 is a schematic circuit diagram of the PWM circuit of the present invention.
Fig. 6 is a schematic circuit diagram of the transformer circuit of the present invention.
Fig. 7 is a schematic circuit diagram of the output synchronous rectification circuit of the present invention.
Fig. 8 is a schematic circuit diagram of the constant current and constant voltage loop of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Reference herein to "a plurality" means greater than or equal to two. "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
As shown in fig. 1-8, a high-power large-current output driving power supply circuit includes an ac interface, an EMI circuit 1, a rectifying and filtering circuit 2, a PFC boost circuit 3, a PWM pulse width modulation circuit 4, a voltage transformation circuit 5, an output synchronous rectification circuit 6, a signal feedback circuit, and a constant current and constant voltage loop 7; the transformation circuit comprises a first transformer and a second transformer which are connected in parallel; the commercial power outputs direct current pulse voltage VIN + through an EMI circuit and a rectifying filter circuit, the direct current pulse voltage VIN + outputs boosted direct current voltage HV after a PFC booster circuit corrects a power factor, the direct current voltage HV is output from a first transformer and a second transformer, the output of a voltage transformation circuit outputs load working voltage to a load through an output synchronous rectifying circuit, a PWM (pulse-width modulation) circuit controls the on-off of a main primary side loop of the voltage transformation circuit through a switching tube Q4, and a secondary primary side loop of the voltage transformation circuit provides starting voltage for the PWM circuit; the constant-current constant-voltage loop collects current and voltage of a load loop in the output synchronous rectification circuit and feeds the current and voltage back to the PWM circuit through the signal feedback circuit, and the PWM circuit controls the output of the voltage transformation circuit and the output synchronous rectification circuit according to the feedback.
Specifically, the EMI circuit is used for filtering the interference of high-frequency pulses of an external power grid to a power supply, and meanwhile, the EMI circuit also plays a role in reducing the electromagnetic interference of the switching power supply to the outside. The EMI circuit comprises a fuse F1, a voltage dependent resistor VR1, a capacitor C3, a common mode inductor LF1, a common mode inductor LF2 and a common mode inductor LF3, a resistor R8, a resistor R9 and a common mode inductor LF4, wherein the fuse F1, the voltage dependent resistor VR1, the capacitor C3, the common mode inductor LF1, the resistor R8, the resistor R27, the resistor R9, the resistor R53 and a node between the resistor R8 and the resistor R9 are connected in parallel to form a connection end VSTSRT. A connection terminal VSTART is provided in the EMI circuit and is electrically connected with the starting terminal of a control chip U2 of the PWM circuit.
Specifically, the rectification filter circuit is used for reducing, rectifying and filtering the alternating current power supply into proper direct current voltage. The rectifying and filtering circuit comprises a bridge rectifying circuit consisting of diodes D11, D13, D14 and D15, an inductor L1, a capacitor C10 and a capacitor C11, wherein the output end of the bridge rectifying circuit is connected with the inductor L1 in series and then outputs direct-current pulse voltage VIN +, the input end of the inductor L1 is connected with the capacitor C10 in series and then is grounded, and the output end of the inductor L1 is connected with the capacitor C11 in series and then is grounded.
Specifically, the PFC boost circuit is configured to perform power factor correction and boost on the dc pulse voltage VIN + output by the rectifying filter circuit to output a stable and reliable dc voltage HV. The PFC boost circuit comprises a PFC chip U1, an inductor T1 and a switching tube Q1, wherein one input end of the inductor T1 is electrically connected with a direct-current pulse voltage VIN +, the other input end of the inductor T1 is electrically connected with the output end of the PFC chip U1, the direct-current pulse voltage VIN + is electrically connected with the input end of the PFC chip U1, the control end of the switching tube Q1 is electrically connected with the control output end of the PFC chip U1, and the output end of the switching tube Q1 is electrically connected with the control end of the PFC chip U1; one path of the output end of the inductor T1 is grounded, and the other path of the output end is connected with the diode D2 and the magnetic bead FB in series and then outputs the direct-current voltage HV; the PWM pulse width modulation circuit provides a starting voltage PFC VCC to the PFC chip U1, and the PFC chip U1 adjusts the dynamic response of the PFC chip U1 according to the starting voltage PFC VCC through the conduction of the switching tube Q3. The direct current pulse voltage VIN + series resistor R2 and the resistor R3 are electrically connected with the MULT end of the PFC chip U1, and the other series resistor R5 is grounded. The switch tube Q1 is a MOS tube, the control end of the switch tube Q1 is connected in series with a resistor R62 and a resistor R12 and then is electrically connected with the control output end of the PFC chip U1, the resistor R12 is connected in parallel with a diode D1, and the output end of the switch tube Q1 is connected in series with the resistor R18 and then is grounded. The MULT pin of the PFC chip U1 is electrically connected with the control end of a switch tube Q2, the input end of a switch tube Q2 is electrically connected with a starting voltage PFC VCC, the switch tube Q2 is electrically connected with the control end of a switch tube Q3 after being connected with a pull-up resistor in series, the input end of a switch tube Q3 is electrically connected with the INV pin of the PFC chip U1, and the COMP pin of the PFC chip U1 is electrically connected with the INV pin after being connected with a resistor R4 and a capacitor C7 in series.
Specifically, the PWM pulse width modulation circuit is used to control the input and output of the transformer circuit according to the feedback signal collected by the feedback terminal. The PWM circuit comprises a control chip U2 and a switch tube Q4, the switch tube Q4 is electrically connected with a control output end of a control chip U2 after being connected with resistors R33 and R32 in series, a resistor R32 is reversely connected with a diode D7 in parallel, the output end of the switch tube Q2 is grounded after being connected with a resistor R37 in series, the resistor R37 is connected with two diodes D18 and D19 in series in a forward direction in parallel, and the input end of the switch tube Q2 is electrically connected with a main primary side loop of the first voltage transformation circuit after being connected with a magnetic bead FB1 in series.
Specifically, the voltage transformation circuit is used for transforming the direct-current voltage HV output by the PFC boost circuit into the working voltage output required by the load. The transformation circuit comprises a first transformer T2 and a second transformer T3, the first transformer T2 and the second transformer T3 are connected in parallel, a primary circuit and a secondary primary circuit of the first transformer T2 are electrically connected with the PWM circuit, a primary circuit of the second transformer T3 is connected in parallel with a primary circuit of the first transformer T2, and secondary sides of the second transformer T3 and the first transformer T2 are electrically connected with an input end of the output synchronous rectification circuit.
Specifically, the output synchronous rectification circuit is used for a power MOSFET with extremely low on-state resistance to replace a rectifier diode, so that the loss of the rectifier can be greatly reduced, the efficiency of the DC/DC converter is improved, and the requirements of low-voltage and large-current rectification are met. The output synchronous rectification circuit comprises a synchronous rectification chip U4 and a switching tube Q5, wherein the control end of the switching tube Q5 is electrically connected with the control output end of the synchronous rectification chip U4, and the input end of the switching tube Q5 is electrically connected with the common output end of the first transformer and the second transformer. A capacitor C27 and a resistor R42 connected in series are connected in parallel between the input terminal and the output terminal of the switching tube Q5. The synchronous rectification chip U4 collects current and voltage signals of the input end and the output end of the switching tube and provides synchronous rectification control. The output synchronous rectification circuit further comprises polar capacitors C28, C29, C33 and a common mode inductor LF 5. The output end of the output synchronous rectification circuit is a load working voltage output end V + and V-. The high-power large-current output of 12V/10A can be realized in the embodiment.
Specifically, the constant current and constant voltage loop is used for sampling current and voltage signals output by the synchronous sorting circuit and feeding the current and voltage signals back to the PWM circuit so as to adjust the constant current and the constant voltage. The constant-current constant-voltage loop comprises a control chip U5, a current acquisition port and a voltage acquisition port of the control chip U5 are respectively and electrically connected with an output synchronous rectification circuit, and a feedback end of the control chip U5 is electrically connected with an input end of the signal feedback circuit. The output synchronous rectification circuit further comprises a plurality of polar capacitors and a common-mode inductor LF 5. The control chip U5 may employ a comparator.
Specifically, the signal feedback circuit is used for reliably transmitting the feedback signal to an upper computer, namely the PWM pulse width modulation circuit, in a photoelectric isolation manner. The signal feedback circuit comprises an optocoupler emitting end U3A and an optocoupler receiving end U3B, the optocoupler emitting end U3A is powered by an output synchronous rectifying circuit and is electrically connected with the output end of the constant-current constant-voltage loop, and the optocoupler receiving end U3B is electrically connected with the feedback end of the PWM circuit.
The working principle of the invention is as follows: the commercial power outputs direct current pulse voltage VIN + through an EMI circuit and a rectifying filter circuit, the direct current pulse voltage VIN + outputs boosted direct current voltage HV after a PFC booster circuit corrects a power factor, the direct current voltage HV is output from a first transformer and a second transformer, the output of a voltage transformation circuit outputs load working voltage to a load through an output synchronous rectifying circuit, a PWM (pulse-width modulation) circuit controls the on-off of a main primary side loop of the voltage transformation circuit through a switching tube Q4, and a secondary primary side loop of the voltage transformation circuit provides starting voltage for the PWM circuit; the constant-current constant-voltage loop collects current and voltage of a load loop in the output synchronous rectification circuit and feeds the current and voltage back to the PWM circuit through the signal feedback circuit, and the PWM circuit controls the output of the voltage transformation circuit and the output synchronous rectification circuit according to the feedback. The invention adopts the circuit scheme that the shunt output of the transformer is adopted to solve the problem of large current output, and the shunt transformers T2 and T3 share the heat dissipation at the same time, thereby improving the reliability of the circuit.
The above examples are intended to illustrate rather than to limit the invention, and all equivalent changes and modifications made by the methods described in the claims of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. A kind of high-power heavy current output drives the power supply circuit, characterized by that: the power supply comprises an alternating current interface, an EMI circuit, a rectifying and filtering circuit, a PFC booster circuit, a PWM pulse width modulation circuit, a voltage transformation circuit, an output synchronous rectifying circuit, a signal feedback circuit and a constant-current and constant-voltage loop; the transformation circuit comprises a first transformer and a second transformer which are connected in parallel; the commercial power outputs direct current pulse voltage VIN + through an EMI circuit and a rectifying filter circuit, the direct current pulse voltage VIN + outputs boosted direct current voltage HV after a PFC booster circuit corrects a power factor, the direct current voltage HV is output from a first transformer and a second transformer, the output of a voltage transformation circuit outputs load working voltage to a load through an output synchronous rectifying circuit, a PWM (pulse-width modulation) circuit controls the on-off of a main primary side loop of the voltage transformation circuit through a switching tube Q4, and a secondary primary side loop of the voltage transformation circuit provides starting voltage for the PWM circuit; the constant-current constant-voltage loop collects current and voltage of a load loop in the output synchronous rectification circuit and feeds the current and voltage back to the PWM circuit through the signal feedback circuit, and the PWM circuit controls the output of the voltage transformation circuit and the output synchronous rectification circuit according to the feedback.
2. A high power high current output driving power supply circuit according to claim 1, wherein: the constant-current constant-voltage loop comprises a control chip U5, a current acquisition port and a voltage acquisition port of the control chip U5 are respectively and electrically connected with an output synchronous rectification circuit, and a feedback end of the control chip U5 is electrically connected with an input end of the signal feedback circuit.
3. A high power high current output driving power supply circuit according to claim 1, wherein: the output synchronous rectification circuit comprises a synchronous rectification chip U4 and a switching tube Q5, wherein the control end of the switching tube Q5 is electrically connected with the control output end of the synchronous rectification chip U4, and the input end of the switching tube Q5 is electrically connected with the common output end of the first transformer and the second transformer.
4. A high power high current output driving power supply circuit according to claim 3, wherein: the output synchronous rectification circuit further comprises a plurality of polar capacitors and a common-mode inductor LF 5.
5. A high power high current output driving power supply circuit according to claim 1, wherein: a connection terminal VSTART is provided in the EMI circuit and is electrically connected with the starting terminal of a control chip U2 of the PWM circuit.
6. A high power high current output driving power supply circuit according to claim 1, wherein: the PFC boost circuit comprises a PFC chip U1, an inductor T1 and a switching tube Q1, wherein one input end of the inductor T1 is electrically connected with a direct-current pulse voltage VIN +, the other input end of the inductor T1 is electrically connected with the output end of the PFC chip U1, the direct-current pulse voltage VIN + is electrically connected with the input end of the PFC chip U1, the control end of the switching tube Q1 is electrically connected with the control output end of the PFC chip U1, and the output end of the switching tube Q1 is electrically connected with the control end of the PFC chip U1; one path of the output end of the inductor T1 is grounded, and the other path of the output end is connected with the diode D2 and the magnetic bead FB in series and then outputs the direct-current voltage HV; the PWM pulse width modulation circuit provides a starting voltage PFC VCC to the PFC chip U1, and the PFC chip U1 adjusts the dynamic response of the PFC chip U1 according to the starting voltage PFC VCC through the conduction of the switching tube Q3.
7. A high power high current output driving power supply circuit according to claim 6, wherein: the MULT pin of the PFC chip U1 is electrically connected with the control end of a switch tube Q2, the input end of a switch tube Q2 is electrically connected with a starting voltage PFC VCC, the switch tube Q2 is electrically connected with the control end of a switch tube Q3 after being connected with a pull-up resistor in series, the input end of a switch tube Q3 is electrically connected with the INV pin of the PFC chip U1, and the COMP pin of the PFC chip U1 is electrically connected with the INV pin after being connected with a resistor R4 and a capacitor C7 in series.
8. A high power high current output driving power supply circuit according to claim 1, wherein: the signal feedback circuit comprises an optocoupler emitting end U3A and an optocoupler receiving end U3B, the optocoupler emitting end U3A is powered by an output synchronous rectifying circuit and is electrically connected with the output end of the constant-current constant-voltage loop, and the optocoupler receiving end U3B is electrically connected with the feedback end of the PWM circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011200754.3A CN112188677A (en) | 2020-11-02 | 2020-11-02 | Drive power supply circuit with high-power and high-current output |
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| CN202011200754.3A CN112188677A (en) | 2020-11-02 | 2020-11-02 | Drive power supply circuit with high-power and high-current output |
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| CN2369269Y (en) * | 1998-12-30 | 2000-03-15 | 中国科学院近代物理研究所 | Flexible switch power supplier with large power high stability D. C. current stabilizer |
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| CN105491713A (en) * | 2015-12-23 | 2016-04-13 | 浙江闲兴光电科技有限公司 | High-power LED street lamp drive circuit |
| WO2018120483A1 (en) * | 2016-12-27 | 2018-07-05 | 广东百事泰电子商务股份有限公司 | Pfc interleaved flyback full bridge based intelligent sine-wave voltage conversion circuit |
| CN213152434U (en) * | 2020-11-02 | 2021-05-07 | 东莞市擎洲光电科技有限公司 | Drive power supply circuit with high-power and high-current output |
-
2020
- 2020-11-02 CN CN202011200754.3A patent/CN112188677A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2369269Y (en) * | 1998-12-30 | 2000-03-15 | 中国科学院近代物理研究所 | Flexible switch power supplier with large power high stability D. C. current stabilizer |
| CN201365198Y (en) * | 2009-01-22 | 2009-12-16 | 皇源电子(深圳)有限公司 | High-efficient series-parallel LED power supply |
| CN102176807A (en) * | 2011-03-08 | 2011-09-07 | 河海大学常州校区 | Self-protective variable frequency modulation ICP (Inductively Coupled Plasma) ballast |
| CN105491713A (en) * | 2015-12-23 | 2016-04-13 | 浙江闲兴光电科技有限公司 | High-power LED street lamp drive circuit |
| WO2018120483A1 (en) * | 2016-12-27 | 2018-07-05 | 广东百事泰电子商务股份有限公司 | Pfc interleaved flyback full bridge based intelligent sine-wave voltage conversion circuit |
| CN213152434U (en) * | 2020-11-02 | 2021-05-07 | 东莞市擎洲光电科技有限公司 | Drive power supply circuit with high-power and high-current output |
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