CN209914129U - LED power supply circuit with ultrahigh power density - Google Patents
LED power supply circuit with ultrahigh power density Download PDFInfo
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- CN209914129U CN209914129U CN201920440569.8U CN201920440569U CN209914129U CN 209914129 U CN209914129 U CN 209914129U CN 201920440569 U CN201920440569 U CN 201920440569U CN 209914129 U CN209914129 U CN 209914129U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a LED power supply circuit of super high power density, including control IC, IC power module, PFC boost module, LCC switch module and output rectification filter module, IC power module input is connected with AC, IC power module output is connected with the control IC input, the control IC output is connected with LCC switch module input, LCC switch module output is connected with output rectification filter module input, output rectification filter module output is connected with the load. The utility model discloses a control IC controls PFC boost module and LCC switch module, and PFC boost module is after stepping up certain voltage, and tends to stably promptly, makes voltage stabilization in certain limit value, exports voltage to output rectification filter module through LCC switch module, exports stable voltage at last and gives the load, and output is high, and application scope is wide, and circuit structure is simple, and the system is stable.
Description
Technical Field
The utility model relates to a power supply circuit field especially relates to a LED power supply circuit of super high power density.
Background
In the prior art, a high-power LED power circuit needs more components and parts, has a large volume, causes slow assembly speed, unstable system and low finished product yield, is generally a two-stage topology circuit, and has two IC control circuits, one IC controls a PFC function and one IC controls an LLC resonance function, and the two ICs need to be debugged respectively, thereby causing low production efficiency.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the LED power circuit with ultra-high power density is small in size, stable in system and low in cost.
The technical scheme of the utility model as follows: an LED power circuit with ultrahigh power density comprises a control IC, an IC power supply module, a PFC boost module, an LCC switch module and an output rectification filter module, wherein the input end of the IC power supply module is connected with an AC, the output end of the IC power supply module is connected with the input end of the control IC, the output end of the control IC is connected with the input end of the PFC boost module, the output end of the control IC is also connected with the input end of the LCC switch module, the IC power supply module is also connected with the LCC switch module through the PFC boost module, the output end of the LCC switch module is connected with the input end of the output rectification filter module, and the output end of the output rectification filter module is connected with a load;
the PFC boost module includes: the power supply circuit comprises R10, Q1, L2, D1 and C5, wherein a first end of the L2 is connected with an IC power supply module, a second end of the L2 is connected with a 7 th pin of a control IC, a 5 th pin of the control IC is connected with a G pole of Q1 through R10, a D pole of the Q1 is connected with a first end of D1, a D pole of the Q1 is also connected with a second end of the L2, a second end of the D1 is connected with a positive pole of C5, and a negative pole of the C5 is connected with a 12 th pin of the control IC;
the LCC switch module includes: r23, R26, Q4, Q5, L3, C12 and T1, wherein the D pole of the Q4 is connected with the second end of the D1, the 16 th pin of the control IC is connected with the G pole of the Q4 through R26, the 1 st pin of the control IC is connected with the G pole of the Q5 through R23, the S pole of the Q4 and the D pole of the Q5 are commonly connected with the first end of the L3, the second end of the L3 is connected with the charging end of the T1 through C12, and the discharging end of the T1 is connected with the input end of the output rectifying and filtering module.
By adopting the technical scheme, the LED power supply circuit with ultrahigh power density further comprises a chopping filtering module, and the chopping filtering module is positioned between the AC and the IC power supply module.
By adopting the technical scheme, the LED power supply circuit with ultrahigh power density further comprises a control EMC module, and the control EMC module is positioned between the AC and the chopping filter module.
By adopting the technical scheme, the LED power supply circuit with ultrahigh power density further comprises a fan power supply module, wherein the input end of the fan power supply module is connected with the T1 discharge end, and the output end of the fan power supply module is connected with a fan.
Adopt above-mentioned each technical scheme, the utility model discloses a control IC controls PFC boost module and LCC switch module, and PFC boost module is after stepping up certain voltage, and tends to stably promptly, makes voltage stabilization in certain range value, exports voltage to output rectification filter module through LCC switch module, exports stable voltage at last and gives the load, and output is high, and application scope is wide, circuit structure is simple, and the system is stable.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment provides an ultra-high power density LED power circuit, which comprises a control IC (U1), an IC power supply module 4, a PFC boost module 1, an LCC switch module 2 and an output rectification filter module 3, wherein the input end of the IC power supply module 4 is connected with an AC, the output end of the IC power supply module 4 is connected with the input end of the control IC, the output end of the control IC is connected with the input end of the PFC boost module 1, the output end of the control IC is also connected with the input end of the LCC switch module 2, the IC power supply module 4 is also connected with the LCC switch module 2 through the PFC boost module 1, the output end of the LCC switch module 2 is connected with the input end of the output rectification filter module 3, and the output end of the output rectification filter module 3 is connected;
the PFC boost module 1 includes: the power supply circuit comprises R10, Q1, L2, D1 and C5, wherein a first end of the L2 is connected with an IC power supply module, a second end of the L2 is connected with a 7 th pin of a control IC, a 5 th pin of the control IC is connected with a G pole of Q1 through R10, a D pole of the Q1 is connected with a first end of D1, a D pole of the Q1 is also connected with a second end of the L2, a second end of the D1 is connected with a positive pole of C5, and a negative pole of the C5 is connected with a 12 th pin of the control IC;
the LCC switch module 2 includes: r23, R26, Q4, Q5, L3, C12 and T1, wherein the D pole of the Q4 is connected with the second end of the D1, the 16 th pin of the control IC is connected with the G pole of the Q4 through R26, the 1 st pin of the control IC is connected with the G pole of the Q5 through R23, the S pole of the Q4 and the D pole of the Q5 are commonly connected with the first end of the L3, the second end of the L3 is connected with the charging end of the T1 through C12, and the discharging end of the T1 is connected with the input end of the output rectifying and filtering module 3.
Referring to fig. 1, when the AC voltage is connected to the circuit through the L line and the N line, the control IC (U1) receives the power signal, and then outputs a control signal to the PFC boost module. Firstly, a 5 th pin of the control IC drives a Q1 after a control signal is subjected to current limiting through R10, the voltage on an L2 inductor determines the on-off of a Q1 switch, and when the voltage rises, the control IC charges C5 through D1 to boost the PFC boost module circuit. When the voltage rises to a preset value and is detected by the control IC, the turn-off of the Q1 is adjusted, so that the voltage tends to be stable.
The PFC boost module transmits stable voltage to the LCC switch module, the control IC drives an LCC control signal to drive a Q5 in a current limiting mode through a 1 st pin and an R23 respectively, drives a Q4 in a current limiting mode through a 16 th pin and an R26, the Q4 and Q5 switches control a C12 capacitor to charge and discharge T1 through an L3 inductor, and voltage and current of T1 are coupled to the output rectifying and filtering module through energy storage and discharge. D11 and C17 in the output rectifying and filtering module rectify and filter the voltage to supply power to the load, which is generally a high power LED. Through adjusting VR1, R38, R15's resistance, can change the operating frequency of LCC switch module, the utility model discloses a through restriction operating frequency, control output terminal voltage current's stability.
Further, the utility model discloses still include chopping filter module 6 and control EMC module 7 in the circuit, chopping filter module 6 is located between control EMC module 7 and the IC power module 4, control EMC module 7 is located between AC and chopping filter module 6. The chopper filter module 6 and the control EMC module 7 are arranged to enable the voltage in the AC to be stably input into the control IC and the PFC boost module, and therefore stability of the system is improved.
Further, the utility model discloses still include fan power module in the circuit, T1 discharge end is connected to fan power module input, the fan is connected to fan power module output. Because the utility model discloses a high power LED power supply circuit, consequently it is necessary to set up the unstable protective measure, through set up fan power module in the circuit to the fan power supply, makes the fan handle the whole circuit cooling, increases the security of circuit and improve circuit's life.
Adopt above-mentioned each technical scheme, the utility model discloses a control IC controls PFC boost module and LCC switch module, and PFC boost module is after stepping up certain voltage, and tends to stably promptly, makes voltage stabilization in certain range value, exports voltage to output rectification filter module through LCC switch module, exports stable voltage at last and gives the load, and output is high, and application scope is wide, circuit structure is simple, and the system is stable.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. An ultra-high power density LED power circuit, characterized by:
the power supply system comprises a control IC, an IC power supply module, a PFC boost module, an LCC switch module and an output rectification filter module, wherein the input end of the IC power supply module is connected with an AC, the output end of the IC power supply module is connected with the input end of the control IC, the output end of the control IC is connected with the input end of the PFC boost module, the output end of the control IC is also connected with the input end of the LCC switch module, the IC power supply module is also connected with the LCC switch module through the PFC boost module, the output end of the LCC switch module is connected with the input end of the output rectification filter module, and the output end of the output rectification;
the PFC boost module includes: the power supply circuit comprises R10, Q1, L2, D1 and C5, wherein a first end of the L2 is connected with an IC power supply module, a second end of the L2 is connected with a 7 th pin of a control IC, a 5 th pin of the control IC is connected with a G pole of Q1 through R10, a D pole of the Q1 is connected with a first end of D1, a D pole of the Q1 is also connected with a second end of the L2, a second end of the D1 is connected with a positive pole of C5, and a negative pole of the C5 is connected with a 12 th pin of the control IC;
the LCC switch module includes: r23, R26, Q4, Q5, L3, C12 and T1, wherein the D pole of the Q4 is connected with the second end of the D1, the 16 th pin of the control IC is connected with the G pole of the Q4 through R26, the 1 st pin of the control IC is connected with the G pole of the Q5 through R23, the S pole of the Q4 and the D pole of the Q5 are commonly connected with the first end of the L3, the second end of the L3 is connected with the charging end of the T1 through C12, and the discharging end of the T1 is connected with the input end of the output rectifying and filtering module.
2. The ultra-high power density LED power supply circuit of claim 1, wherein: the circuit also comprises a chopping filtering module, wherein the chopping filtering module is positioned between the AC and the IC power supply module.
3. The ultra-high power density LED power supply circuit of claim 2, wherein: the system further comprises a control EMC module located between the AC and the chopper filter module.
4. The ultra-high power density LED power supply circuit of claim 1, wherein: the fan power supply device is characterized by further comprising a fan power supply module, wherein the input end of the fan power supply module is connected with the T1 discharging end, and the output end of the fan power supply module is connected with the fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440569.8U CN209914129U (en) | 2019-04-02 | 2019-04-02 | LED power supply circuit with ultrahigh power density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920440569.8U CN209914129U (en) | 2019-04-02 | 2019-04-02 | LED power supply circuit with ultrahigh power density |
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| Publication Number | Publication Date |
|---|---|
| CN209914129U true CN209914129U (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920440569.8U Active CN209914129U (en) | 2019-04-02 | 2019-04-02 | LED power supply circuit with ultrahigh power density |
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| Country | Link |
|---|---|
| CN (1) | CN209914129U (en) |
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2019
- 2019-04-02 CN CN201920440569.8U patent/CN209914129U/en active Active
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