[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN216357402U - LED power supply controller - Google Patents

LED power supply controller Download PDF

Info

Publication number
CN216357402U
CN216357402U CN202121743876.7U CN202121743876U CN216357402U CN 216357402 U CN216357402 U CN 216357402U CN 202121743876 U CN202121743876 U CN 202121743876U CN 216357402 U CN216357402 U CN 216357402U
Authority
CN
China
Prior art keywords
resistor
output
capacitor
power supply
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202121743876.7U
Other languages
Chinese (zh)
Inventor
顾斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangye Shanghai Technology Co ltd
Original Assignee
Guangye Shanghai Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangye Shanghai Technology Co ltd filed Critical Guangye Shanghai Technology Co ltd
Priority to CN202121743876.7U priority Critical patent/CN216357402U/en
Application granted granted Critical
Publication of CN216357402U publication Critical patent/CN216357402U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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]
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The utility model relates to an LED power supply controller, which comprises a protection circuit, a filter circuit, a rectifier bridge module, a transformer, an output voltage-stabilizing filter circuit, a constant current regulating circuit, a feedback circuit and an IC (integrated circuit) main control circuit, and is characterized in that the rectifier bridge module is used for connecting the filter circuit and the protection circuit; the power supply controller ensures that the LED power supply has a high power factor and a wide input voltage and output power by using a critical working mode (CrM), and the power supply has high output power and small output ripple.

Description

LED power supply controller
Technical Field
The utility model relates to the technical field of LED power supplies, in particular to an LED power supply controller.
Background
The conventional high-power LED mainly adopts alternating current power supply, and constant voltage and current are obtained through a converter to supply power to the high-power LED, but the mode has low power factor and can not effectively inhibit disturbance brought by an input end;
in addition, the dimming is mainly realized by changing the current flowing through the high-power LED, and under the condition of different currents, the luminous wavelength is different, so that the luminous efficiency is influenced, and therefore, the circuits have the defects of weak anti-interference capability, poor output stability, low output precision, low power factor and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an LED power supply controller to solve the defects in the prior art.
The technical scheme for solving the technical problems is as follows:
the LED power supply controller comprises a protection circuit, a filter circuit, a rectifier bridge module, a transformer, an output voltage stabilization filter circuit, a constant current regulation circuit, a feedback circuit and an IC (integrated circuit) main control circuit, wherein the rectifier bridge module is used for connecting the filter circuit and the protection circuit;
the protection circuit comprises a lightning arrester F1 and a voltage dependent resistor RV1, wherein the F1 is connected in series with one end of an alternating current input line, and the RV1 is connected in series between the L end and the N end of the alternating current input line;
the filter circuit comprises an X2 safety regulation capacitor CX1, a magnetic ring L1, an X2 safety regulation capacitor CX2, a Y2 safety regulation capacitor CY1, a Y2 safety regulation capacitor CY2 and a Y2 safety regulation capacitor CY3, wherein the CX1, the L1 and the CX2 are used for inhibiting power supply electromagnetic interference; one end of an X2 safety capacitor CX1 is connected with the L end, the other end of the X2 safety capacitor CX1 is connected with the N end, a magnetic ring L1 is connected in series in a circuit, two groups of coils are respectively connected with the L end and the N end, one end of the X2 safety capacitor CX2 is connected to the L end of the output end of the magnetic ring, and the other end of the X2 safety capacitor CX2 is connected to the N end of the output end of the magnetic ring; the safety capacitor Y2 comprises capacitors CY1, CY2 and CY3, wherein common mode interference is inhibited, one end of CY1 is connected with the L end, the other end of CY1 is connected with the ground, one end of CY2 is connected with N, the other end of CY2 is connected with the ground, CY3 is connected with one end of a capacitor C1, and the other end of the capacitor C3 is connected with the ground;
the rectifier bridge module comprises rectifier bridges BD1, L2, R33, C1, C2, R2 and D1 for converting alternating current into direct current, wherein an alternating current input end of the BD1 is respectively connected with an L end and an N end of an alternating current input, an output positive electrode is connected with one ends of the L2 and the R33, and an output negative electrode is connected with one end of the CY3 and one end of the capacitor C1 and is connected with a GND end; l2, R33 and C1 form a filter circuit, L2 and R33 are connected in parallel, one end of L2 and one end of R33 are connected with the output anode of BD1, and the other end of L1 is connected with C1; c2, R2 and D1 are circuits for protecting MOS tubes, C2 and R2 are connected in parallel, one end of the C2 is connected with the positive end of a direct-current power supply, the other end of the C2 is connected with one end of a D1 diode, and the other end of the D1 is connected with a group of coils of a transformer and is connected with the drain electrode of the MOS tube Q1;
the transformer is a direct current converted by the rectifying circuit, and the MOS tube is controlled by the master control IC circuit to conduct the transformer main coil to form a loop to the ground; meanwhile, voltage is provided for the output voltage-stabilizing filter circuit and the feedback circuit, and feedback voltage is provided for the IC main control circuit.
Further, the output voltage stabilizing filter circuit comprises resistors R25, R26, R27, a capacitor C3, electrolytic capacitors CD4, CD5, a diode D5 and a magnetic ring L3; wherein D5, R26, R27 and C3 prevent reverse current input, D5 is connected with R27, R26 and C3 in parallel, one end of the D5 connected to the coil is connected with one ends of R26 and R27, the other ends of R26 and R27 are connected with one end of C3, and the other end of C3 is connected with the other end of D5; the CD5 and the CD4 are output filter capacitors, reduce output ripples, and are connected in series to form an output anode and an output cathode, one ends of the CD5 and the CD4 are connected with the output anode, and the other ends of the CD5 and the CD4 are respectively connected to two ends of the R25 sampling resistor; l3 is output inductor, anti-interference, two groups of coils are connected to the filtered positive pole and negative pole, the other end of the coil is connected to the output load; and R25 is an output current sampling resistor connected in series to the negative pole of the output end.
Further, the constant current regulating circuit comprises resistors R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R21, R22, R54, diodes D11, D12, electrolytic capacitors CD2, CD6, a triode Q3, capacitors C10, C11, C12, C13, C14, C15 and a chip IC 2; wherein, R54, D11, CD2, R9, D12, Q3 and CD6 are output voltage-stabilizing circuits and provide power supply voltage for IC2, one end of R54 is connected with one end of a coil, the other end is connected with a diode D11, the other end of D11 is connected with one end of a resistor R9 of an electrolytic capacitor CD2 and a collector of a triode, one end of the other end of the resistor R9 is connected with a voltage-stabilizing tube D12 and is connected with a base electrode of the triode Q3, the other end of the voltage-stabilizing tube is connected with a negative electrode of a power supply, and the electrolytic capacitor CD6 is connected with an emitter electrode and a negative electrode of the triode Q3; one end of the resistor R23 is connected to the output anode, the other end is connected with one ends of the resistors R21 and R22, and the other ends of the resistors R21 and R22 are connected to the cathode of the power supply; one ends of the resistors R10 and R17 are connected to the anode of an emitter power supply of the Q3 triode, the other end of the resistor R17 is connected to the input positive end of the operational amplifier and the resistor R15, the resistor R27 is connected in series with the capacitor C15, the other end of the resistor R27 is connected to the output pin of the operational amplifier, and the other end of the capacitor C15 is connected to the input negative end of the operational amplifier; the capacitor C13 is connected to the positive pole and the negative pole of the power supply and used for supplying power to the IC 2; the other end of the resistor R15 is connected to the input positive terminal of the second path of the operational amplifier and is connected with one end of the resistors R13, R14 and C11; the other ends of the resistors R13 and R14 are connected with one end of a current sampling resistor R25, the other end of the capacitor C11 is connected with the input negative end of the second path of the operational amplifier and is connected with the capacitors C10 and R19, the other end of the capacitor R19 is connected with the negative electrode of a power supply, the C10 is connected with the R16 in series, and the other end of the R16 is connected with the output end of the second path of the operational amplifier.
Further, the feedback circuit comprises resistors R10, R11, R12, R21, R45, R51, R52, capacitors C10 and C20, diodes D2 and D3, optocouplers PC1 and PC2, and a silicon controlled rectifier SCR; one end of a resistor R10 is connected with the positive electrode of a power supply, the other end of the resistor R10 is connected with the input positive end of a resistor R45 and an optocoupler PC1, the other end of the resistor R45 is connected with the negative end of a C20, a R12 and a R11 optocoupler PC1, the other end of the C20 is connected with the negative electrode of the power supply, and the other end of the R11 is connected with the output end of the second operational amplifier; the positive output terminal of the PC1 optocoupler is connected to one end of a resistor R35; the resistor R10 is connected with the voltage regulator tube D3 in series, one end of R10 is connected to the positive end of the input of the optical coupler, and the negative end of the input of the optical coupler is connected with the negative electrode of the power supply; the other end of the voltage regulator tube D3 is connected to one end of a resistor R23; the positive output end of the optocoupler is connected with one end of a resistor R52, the negative end of the optocoupler is connected with a capacitor C10, a resistor R21 and a control electrode of the controllable silicon, and the capacitor C10, the resistor R21 and a cathode of the controllable silicon are connected with a negative rectifier electrode; the anode of the controlled silicon is connected with one end of D2 and R51; the other end of the diode D2 is connected to the seventh pin DRV of the IC1, and the other ends of the resistors R51 and R52 are connected to the power supply terminal of the IC 1.
Further, the IC master control circuit includes resistors R1, R3, R4, R5, R6, R7, R8, R28, R30, R31, R34, R35, R36, R37, R47, R48, D6, D7, D9, D10, Q1, Q2, IC1, C4, C5, C6, C18, C19, C22, C23, CD1, CD 8; the resistors R30 and R31 are connected in series, one end of R30 is connected to the positive electrode of the rectification output, the other end of R30 is connected to one end of a capacitor C19 at the Ct end of a pin 3 of the IC1, the other end of C19 is connected to the negative electrode of the rectification output, and the Ct end generates a current source to charge an external timing capacitor.
The utility model has the beneficial effects that: the critical operating mode (CrM) is used to ensure that the LED power supply has high power factor and wide input voltage and output power, the output power of the power supply is high, and the output ripple is small.
Drawings
FIG. 1 is a schematic diagram of the circuit structure of the present invention;
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, the LED power supply controller includes a protection circuit, a filter circuit, a bridge rectifier module, a transformer, an output voltage stabilization filter circuit, a constant current regulation circuit, a feedback circuit, and an IC master control circuit, where the bridge rectifier module is used to connect the filter circuit and the protection circuit;
the protection circuit comprises a lightning arrester F1 and a voltage dependent resistor RV1, wherein the F1 is connected in series with one end of an alternating current input line, and the RV1 is connected in series between the L end and the N end of the alternating current input line;
the filter circuit comprises an X2 safety regulation capacitor CX1, a magnetic ring L1, an X2 safety regulation capacitor CX2, a Y2 safety regulation capacitor CY1, a Y2 safety regulation capacitor CY2 and a Y2 safety regulation capacitor CY3, wherein the CX1, the L1 and the CX2 are used for inhibiting power supply electromagnetic interference; one end of an X2 safety capacitor CX1 is connected with the L end, the other end of the X2 safety capacitor CX1 is connected with the N end, a magnetic ring L1 is connected in series in a circuit, two groups of coils are respectively connected with the L end and the N end, one end of the X2 safety capacitor CX2 is connected to the L end of the output end of the magnetic ring, and the other end of the X2 safety capacitor CX2 is connected to the N end of the output end of the magnetic ring; the safety capacitor Y2 comprises capacitors CY1, CY2 and CY3, wherein common mode interference is inhibited, one end of CY1 is connected with the L end, the other end of CY1 is connected with the ground, one end of CY2 is connected with N, the other end of CY2 is connected with the ground, CY3 is connected with one end of a capacitor C1, and the other end of the capacitor C3 is connected with the ground;
the rectifier bridge module comprises rectifier bridges BD1, L2, R33, C1, C2, R2 and D1 for converting alternating current into direct current, wherein an alternating current input end of the BD1 is respectively connected with an L end and an N end of an alternating current input, an output positive electrode is connected with one ends of the L2 and the R33, and an output negative electrode is connected with one end of the CY3 and one end of the capacitor C1 and is connected with a GND end; l2, R33 and C1 form a filter circuit, L2 and R33 are connected in parallel, one end of L2 and one end of R33 are connected with the output anode of BD1, and the other end of L1 is connected with C1; c2, R2 and D1 are circuits for protecting MOS tubes, C2 and R2 are connected in parallel, one end of the C2 is connected with the positive end of a direct-current power supply, the other end of the C2 is connected with one end of a D1 diode, and the other end of the D1 is connected with a group of coils of a transformer and is connected with the drain electrode of the MOS tube Q1;
the transformer is a direct current converted by the rectifying circuit, and the MOS tube is controlled by the master control IC circuit to conduct the transformer main coil to form a loop to the ground; meanwhile, voltage is provided for the output voltage-stabilizing filter circuit and the feedback circuit, and feedback voltage is provided for the IC main control circuit.
More specifically, the output voltage stabilizing filter circuit comprises resistors R25, R26, R27, a capacitor C3, electrolytic capacitors CD4, CD5, a diode D5 and a magnetic ring L3; wherein D5, R26, R27 and C3 prevent reverse current input, D5 is connected with R27, R26 and C3 in parallel, one end of the D5 connected to the coil is connected with one ends of R26 and R27, the other ends of R26 and R27 are connected with one end of C3, and the other end of C3 is connected with the other end of D5; the CD5 and the CD4 are output filter capacitors, reduce output ripples, and are connected in series to form an output anode and an output cathode, one ends of the CD5 and the CD4 are connected with the output anode, and the other ends of the CD5 and the CD4 are respectively connected to two ends of the R25 sampling resistor; l3 is output inductor, anti-interference, two groups of coils are connected to the filtered positive pole and negative pole, the other end of the coil is connected to the output load; and R25 is an output current sampling resistor connected in series to the negative pole of the output end.
More specifically, the constant current regulating circuit comprises resistors R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R21, R22, R54, diodes D11, D12, electrolytic capacitors CD2, CD6, a triode Q3, capacitors C10, C11, C12, C13, C14, C15 and a chip IC 2; wherein, R54, D11, CD2, R9, D12, Q3 and CD6 are output voltage-stabilizing circuits and provide power supply voltage for IC2, one end of R54 is connected with one end of a coil, the other end is connected with a diode D11, the other end of D11 is connected with one end of a resistor R9 of an electrolytic capacitor CD2 and a collector of a triode, one end of the other end of the resistor R9 is connected with a voltage-stabilizing tube D12 and is connected with a base electrode of the triode Q3, the other end of the voltage-stabilizing tube is connected with a negative electrode of a power supply, and the electrolytic capacitor CD6 is connected with an emitter electrode and a negative electrode of the triode Q3; one end of the resistor R23 is connected to the output anode, the other end is connected with one ends of the resistors R21 and R22, and the other ends of the resistors R21 and R22 are connected to the cathode of the power supply; one ends of the resistors R10 and R17 are connected to the anode of an emitter power supply of the Q3 triode, the other end of the resistor R17 is connected to the input positive end of the operational amplifier and the resistor R15, the resistor R27 is connected in series with the capacitor C15, the other end of the resistor R27 is connected to the output pin of the operational amplifier, and the other end of the capacitor C15 is connected to the input negative end of the operational amplifier; the capacitor C13 is connected to the positive pole and the negative pole of the power supply and used for supplying power to the IC 2; the other end of the resistor R15 is connected to the input positive terminal of the second path of the operational amplifier and is connected with one end of the resistors R13, R14 and C11; the other ends of the resistors R13 and R14 are connected with one end of a current sampling resistor R25, the other end of the capacitor C11 is connected with the input negative end of the second path of the operational amplifier and is connected with the capacitors C10 and R19, the other end of the capacitor R19 is connected with the negative electrode of a power supply, the C10 is connected with the R16 in series, and the other end of the R16 is connected with the output end of the second path of the operational amplifier.
More specifically, the feedback circuit comprises resistors R10, R11, R12, R21, R45, R51, R52, capacitors C10 and C20, diodes D2 and D3, optocouplers PC1 and PC2, and a silicon controlled rectifier SCR; one end of a resistor R10 is connected with the positive electrode of a power supply, the other end of the resistor R10 is connected with the input positive end of a resistor R45 and an optocoupler PC1, the other end of the resistor R45 is connected with the negative end of a C20, a R12 and a R11 optocoupler PC1, the other end of the C20 is connected with the negative electrode of the power supply, and the other end of the R11 is connected with the output end of the second operational amplifier; the positive output terminal of the PC1 optocoupler is connected to one end of a resistor R35; the resistor R10 is connected with the voltage regulator tube D3 in series, one end of R10 is connected to the positive end of the input of the optical coupler, and the negative end of the input of the optical coupler is connected with the negative electrode of the power supply; the other end of the voltage regulator tube D3 is connected to one end of a resistor R23; the positive output end of the optocoupler is connected with one end of a resistor R52, the negative end of the optocoupler is connected with a capacitor C10, a resistor R21 and a control electrode of the controllable silicon, and the capacitor C10, the resistor R21 and a cathode of the controllable silicon are connected with a negative rectifier electrode; the anode of the controlled silicon is connected with one end of D2 and R51; the other end of the diode D2 is connected to the seventh pin DRV of the IC1, and the other ends of the resistors R51 and R52 are connected to the power supply terminal of the IC 1.
More specifically, the IC master control circuit includes resistors R1, R3, R4, R5, R6, R7, R8, R28, R30, R31, R34, R35, R36, R37, R47, R48, D6, D7, D9, D10, Q1, Q2, IC1, C4, C5, C6, C18, C19, C22, C23, CD1, CD 8; the resistors R30 and R31 are connected in series, one end of R30 is connected to the positive electrode of the rectification output, the other end of R30 is connected to one end of a capacitor C19 at the Ct end of a pin 3 of the IC1, the other end of C19 is connected to the negative electrode of the rectification output, and the Ct end generates a current source to charge an external timing capacitor.
The specific working principle is as follows:
the IC main control circuit controls the on-time of the power switch by comparing with the internal divided control voltage. At the end of the turn-on time, the Ct terminal discharges the external capacitance. Resistors R34, R48, R47, R36 and D10 are connected in series, R34 is connected to the anode of the rectification output, R47 and R36 are connected to the power supply pin of the IC1, R36 is connected to the pin FB of the IC1, the cathode of the rectification output of the pin FB is connected with a diode D10, and a reference voltage is provided for the pin FB, and the pin FB is the reverse input end of the error amplifier. A voltage divider resistor divides the output voltage to match Vref to maintain regulation. The feedback voltage is used for high voltage and low voltage protection. When the pin terminal is higher than OVP voltage or lower than UVP voltage or is suspended, the controller stops working. One end of a resistor R35 is connected to the 2-pin Control of the IC1 and one ends of capacitors C5 and C22 are connected, the C5 and a resistor R5 are connected in series to the negative electrode of the rectified output, the other end of the capacitor C22 is connected to the negative electrode of the rectified output, and the 2-pin Control of the IC1 is the output end of the error amplifier. A feedback network between the Control pin and ground can be used to set the loop bandwidth. A low bandwidth may result in a high power factor and a low Total Harmonic Distortion (THD). The 4-pin CS of the IC1 is connected with one end of a resistor R3, the other end of R3 is connected with the negative electrode of the rectified output of a resistor R7 and a R1 sampling resistor pair and the source electrode of a MOS tube Q1, and the CS pin limits cycle-by-cycle current through a power switch. When the CS voltage exceeds Vilim, the drive is off. The sampling resistor connected to the CS pin determines the maximum switch current. The 5-pin ZCD of the IC1 is connected in series with one end of a resistor R6, the other end of the resistor R6 is connected to a transformer coil, and the pin of the 5-pin ZCD induces the voltage of an auxiliary coil to detect whether the inductor is demagnetized when the CrM works. Pin 6 of IC1 is connected to the negative terminal of the rectified output. The 7-pin DRV of the IC1 is connected to one end of a resistor R4, a diode D6 and a diode D2, the other end of the resistor R4 and the other end of the diode D6 are connected to the grid of a MOS transistor Q1, and a series resistor R8 is connected to the source of the MOS transistor. The drain electrode and the source electrode of the MOS tube are connected in series with a high-voltage capacitor. Resistors R37 and R6 are connected to the anode of the transformer coil, a resistor R37 is connected with the positive end of a diode D9 in series, the negative end of D9 is connected with the anode of an electrolytic capacitor CD8, a resistor R28 and one end of the collector of a triode Q2, the other end of the resistor R28 is connected with the base of a triode Q2, the other end of the resistor R28 is connected with the cathode of a rectification output in series with a voltage stabilizing diode D7, the cathodes of a diode D7 and the capacitor CD8 are connected with the cathode of the rectification output, and the emitter of the triode Q2 is connected with an 8-pin of an IC1 to provide power.
The LED power supply has the advantages of compact structure, small volume, 20mm of overall height, 26W of power, 15V-37V of output voltage range and 720mA output of constant current, and ensures that the LED power supply has higher power factor and wide input voltage and output power by adopting an active power factor controller and using a critical working mode (CrM), and the specific parameters and the performance are as follows:
1. the input voltage is 85V-264V wide voltage input.
2. Outputting a voltage constant current with high precision;
3. the power supply solves the problem of no interference in short distance. Meanwhile, the anti-interference capability is strong;
4. the power supply efficiency is high;
5. the product design meets the PSE safety standard;
6. the power supply output has small ripple.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

  1. LED power supply controller which characterized in that: the circuit comprises a protection circuit, a filter circuit, a rectifier bridge module, a transformer, an output voltage stabilization filter circuit, a constant current regulation circuit, a feedback circuit and an IC (integrated circuit) main control circuit, wherein the rectifier bridge module is used for connecting the filter circuit and the protection circuit;
    the protection circuit comprises a lightning arrester F1 and a voltage dependent resistor RV1, wherein the F1 is connected in series with one end of an alternating current input line, and the RV1 is connected in series between the L end and the N end of the alternating current input line;
    the filter circuit comprises an X2 safety regulation capacitor CX1, a magnetic ring L1, an X2 safety regulation capacitor CX2, a Y2 safety regulation capacitor CY1, a Y2 safety regulation capacitor CY2 and a Y2 safety regulation capacitor CY3, wherein the CX1, the L1 and the CX2 are used for inhibiting power supply electromagnetic interference; one end of an X2 safety capacitor CX1 is connected with the L end, the other end of the X2 safety capacitor CX1 is connected with the N end, a magnetic ring L1 is connected in series in a circuit, two groups of coils are respectively connected with the L end and the N end, one end of the X2 safety capacitor CX2 is connected to the L end of the output end of the magnetic ring, and the other end of the X2 safety capacitor CX2 is connected to the N end of the output end of the magnetic ring; the safety capacitor Y2 comprises capacitors CY1, CY2 and CY3, wherein common mode interference is inhibited, one end of CY1 is connected with the L end, the other end of CY1 is connected with the ground, one end of CY2 is connected with N, the other end of CY2 is connected with the ground, CY3 is connected with one end of a capacitor C1, and the other end of the capacitor C3 is connected with the ground;
    the rectifier bridge module comprises rectifier bridges BD1, L2, R33, C1, C2, R2 and D1 for converting alternating current into direct current, wherein an alternating current input end of the BD1 is respectively connected with an L end and an N end of an alternating current input, an output positive electrode is connected with one ends of the L2 and the R33, and an output negative electrode is connected with one end of the CY3 and one end of the capacitor C1 and is connected with a GND end; l2, R33 and C1 form a filter circuit, L2 and R33 are connected in parallel, one end of L2 and one end of R33 are connected with the output anode of BD1, and the other end of L1 is connected with C1; c2, R2 and D1 are circuits for protecting MOS tubes, C2 and R2 are connected in parallel, one end of the C2 is connected with the positive end of a direct-current power supply, the other end of the C2 is connected with one end of a D1 diode, and the other end of the D1 is connected with a group of coils of a transformer and is connected with the drain electrode of the MOS tube Q1;
    the transformer is a direct current converted by the rectifying circuit, and the MOS tube is controlled by the master control IC circuit to conduct the transformer main coil to form a loop to the ground; meanwhile, voltage is provided for the output voltage-stabilizing filter circuit and the feedback circuit, and feedback voltage is provided for the IC main control circuit.
  2. 2. The LED power supply controller of claim 1, wherein: the output voltage stabilizing filter circuit comprises resistors R25, R26, R27, a capacitor C3, an electrolytic capacitor CD4, a CD5, a diode D5 and a magnetic ring L3; wherein D5, R26, R27 and C3 prevent reverse current input, D5 is connected with R27, R26 and C3 in parallel, one end of the D5 connected to the coil is connected with one ends of R26 and R27, the other ends of R26 and R27 are connected with one end of C3, and the other end of C3 is connected with the other end of D5; the CD5 and the CD4 are output filter capacitors, reduce output ripples, and are connected in series to form an output anode and an output cathode, one ends of the CD5 and the CD4 are connected with the output anode, and the other ends of the CD5 and the CD4 are respectively connected to two ends of the R25 sampling resistor; l3 is output inductor, anti-interference, two groups of coils are connected to the filtered positive pole and negative pole, the other end of the coil is connected to the output load; and R25 is an output current sampling resistor connected in series to the negative pole of the output end.
  3. 3. The LED power supply controller of claim 2, wherein: the constant current regulating circuit comprises resistors R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R21, R22, R54, diodes D11, D12, electrolytic capacitors CD2, CD6, a triode Q3, capacitors C10, C11, C12, C13, C14, C15 and a chip IC 2; wherein, R54, D11, CD2, R9, D12, Q3 and CD6 are output voltage-stabilizing circuits and provide power supply voltage for IC2, one end of R54 is connected with one end of a coil, the other end is connected with a diode D11, the other end of D11 is connected with one end of a resistor R9 of an electrolytic capacitor CD2 and a collector of a triode, one end of the other end of the resistor R9 is connected with a voltage-stabilizing tube D12 and is connected with a base electrode of the triode Q3, the other end of the voltage-stabilizing tube is connected with a negative electrode of a power supply, and the electrolytic capacitor CD6 is connected with an emitter electrode and a negative electrode of the triode Q3; one end of the resistor R23 is connected to the output anode, the other end is connected with one ends of the resistors R21 and R22, and the other ends of the resistors R21 and R22 are connected to the cathode of the power supply; one ends of the resistors R10 and R17 are connected to the anode of an emitter power supply of the Q3 triode, the other end of the resistor R17 is connected to the input positive end of the operational amplifier and the resistor R15, the resistor R27 is connected in series with the capacitor C15, the other end of the resistor R27 is connected to the output pin of the operational amplifier, and the other end of the capacitor C15 is connected to the input negative end of the operational amplifier; the capacitor C13 is connected to the positive pole and the negative pole of the power supply and used for supplying power to the IC 2; the other end of the resistor R15 is connected to the input positive terminal of the second path of the operational amplifier and is connected with one end of the resistors R13, R14 and C11; the other ends of the resistors R13 and R14 are connected with one end of a current sampling resistor R25, the other end of the capacitor C11 is connected with the input negative end of the second path of the operational amplifier and is connected with the capacitors C10 and R19, the other end of the capacitor R19 is connected with the negative electrode of a power supply, the C10 is connected with the R16 in series, and the other end of the R16 is connected with the output end of the second path of the operational amplifier.
  4. 4. The LED power supply controller of claim 3, wherein: the feedback circuit comprises resistors R10, R11, R12, R21, R45, R51, R52, capacitors C10 and C20, diodes D2 and D3, optical couplers PC1 and PC2 and a silicon controlled rectifier SCR; one end of a resistor R10 is connected with the positive electrode of a power supply, the other end of the resistor R10 is connected with the input positive end of a resistor R45 and an optocoupler PC1, the other end of the resistor R45 is connected with the negative end of a C20, a R12 and a R11 optocoupler PC1, the other end of the C20 is connected with the negative electrode of the power supply, and the other end of the R11 is connected with the output end of the second operational amplifier; the positive output terminal of the PC1 optocoupler is connected to one end of a resistor R35; the resistor R10 is connected with the voltage regulator tube D3 in series, one end of R10 is connected to the positive end of the input of the optical coupler, and the negative end of the input of the optical coupler is connected with the negative electrode of the power supply; the other end of the voltage regulator tube D3 is connected to one end of a resistor R23; the positive output end of the optocoupler is connected with one end of a resistor R52, the negative end of the optocoupler is connected with a capacitor C10, a resistor R21 and a control electrode of the controllable silicon, and the capacitor C10, the resistor R21 and a cathode of the controllable silicon are connected with a negative rectifier electrode; the anode of the controlled silicon is connected with one end of D2 and R51; the other end of the diode D2 is connected to the seventh pin DRV of the IC1, and the other ends of the resistors R51 and R52 are connected to the power supply terminal of the IC 1.
  5. 5. The LED power supply controller of claim 1, wherein: the IC main control circuit comprises resistors R1, R3, R4, R5, R6, R7, R8, R28, R30, R31, R34, R35, R36, R37, R47, R48, D6, D7, D9, D10, Q1, Q2, IC1, C4, C5, C6, C18, C19, C22, C23, CD1 and CD 8; the resistors R30 and R31 are connected in series, one end of R30 is connected to the positive electrode of the rectification output, the other end of R30 is connected to one end of a capacitor C19 at the Ct end of a pin 3 of the IC1, the other end of C19 is connected to the negative electrode of the rectification output, and the Ct end generates a current source to charge an external timing capacitor; resistors R34, R48, R47, R36 and D10 are connected in series, R34 is connected to the anode of the rectification output, R47 and R36 are connected to the power supply pin of the IC1, R36 is connected to the FB of the pin 1 of the IC1, the cathode of the rectification output of the FB pin is connected with a diode D10 to provide reference voltage for the FB pin, and the FB is the reverse input end of the error amplifier; one end of a resistor R35 is connected to a 2-pin Control of an IC1 and is connected with one ends of capacitors C5 and C22, the C5 and a resistor R5 are connected in series to the negative electrode of the rectified output, the other end of the capacitor C22 is connected with the negative electrode of the rectified output, and the 2-pin Control of the IC1 is the output end of the error amplifier; a 4-pin CS of the IC1 is connected with one end of a resistor R3, and the other end of the R3 is connected with the negative electrode of the rectified output of the resistor R7 and the R1 sampling resistor pair and the source electrode of the MOS transistor Q1; a 5-pin ZCD of the IC1 is connected in series with one end of a resistor R6, and the other end of the resistor R6 is connected to a transformer coil; pin 6 of IC1 is connected to the negative pole of the rectified output; a pin 7 DRV of the IC1 is connected to one ends of a resistor R4, a diode D6 and a diode D2, the other ends of the resistor R4 and the diode D6 are connected to the grid electrode of the MOS tube Q1, and the resistor R8 is connected to the source electrode of the MOS tube in series; the drain electrode and the source electrode of the MOS tube are connected in series with a high-voltage capacitor; resistors R37 and R6 are connected to the anode of the transformer coil, a resistor R37 is connected with the positive end of a diode D9 in series, the negative end of D9 is connected with the anode of an electrolytic capacitor CD8, a resistor R28 and one end of the collector of a triode Q2, the other end of the resistor R28 is connected with the base of a triode Q2, the other end of the resistor R28 is connected with the cathode of a rectification output in series with a voltage stabilizing diode D7, the cathodes of a diode D7 and the capacitor CD8 are connected with the cathode of the rectification output, and the emitter of the triode Q2 is connected with an 8-pin of an IC1 to provide power.
CN202121743876.7U 2021-07-29 2021-07-29 LED power supply controller Active CN216357402U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121743876.7U CN216357402U (en) 2021-07-29 2021-07-29 LED power supply controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121743876.7U CN216357402U (en) 2021-07-29 2021-07-29 LED power supply controller

Publications (1)

Publication Number Publication Date
CN216357402U true CN216357402U (en) 2022-04-19

Family

ID=81159119

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121743876.7U Active CN216357402U (en) 2021-07-29 2021-07-29 LED power supply controller

Country Status (1)

Country Link
CN (1) CN216357402U (en)

Similar Documents

Publication Publication Date Title
CN201414244Y (en) Driving circuit for high-power LED street lamps
CN101834541B (en) Constant current circuit with high power factor
CN101801136A (en) High-efficiency LED constant current driving circuit
CN106921303B (en) Switching power supply transformer
CN112003466B (en) Three-phase APFC rectifier capable of realizing voltage boosting and reducing and working method thereof
CN202178715U (en) AC-DC power conversion chip and power conversion circuit
CN212210864U (en) Ammeter power supply circuit and ammeter
CN216357402U (en) LED power supply controller
CN101415283B (en) Universal power conditioner for lighting lamp
CN207218553U (en) A kind of single-end flyback switching power supply transformer
CN211297024U (en) 2.4G-A30 type lighting control circuit
CN201887991U (en) Module integrated, high-efficiency and high-power LED (light-emitting diode) driving power supply circuit
CN115603552A (en) Flyback switching power supply AC-DC conversion circuit
CN102969910A (en) Switching power supply control chip and application circuit thereof
CN216390807U (en) Multifunctional integrated power supply
CN111313723A (en) Ammeter power supply circuit and ammeter
CN207490788U (en) A kind of single-end flyback switching power supply circuit
CN201556931U (en) Protective device for high-power switch power supply
CN111432523A (en) BUCK constant current control circuit with input voltage changing along with output voltage and power supply
CN221806717U (en) High-power adjustable voltage-stabilizing frequency-stabilizing power supply device
CN219678328U (en) Non-isolated power supply circuit and lamp
CN215956272U (en) Wide input buck-boost converter on a large scale
CN219204734U (en) LED driving circuit and LED lighting device
CN116505536B (en) Pressure stabilizing system and method for microwave source of MPCVD equipment
CN218733889U (en) Switching power supply circuit and charger thereof

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant