CN218868412U - LED emergency dimming circuit with multiple parallel lamps and no LN line - Google Patents
LED emergency dimming circuit with multiple parallel lamps and no LN line Download PDFInfo
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- CN218868412U CN218868412U CN202320054256.5U CN202320054256U CN218868412U CN 218868412 U CN218868412 U CN 218868412U CN 202320054256 U CN202320054256 U CN 202320054256U CN 218868412 U CN218868412 U CN 218868412U
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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
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- 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]
Abstract
The utility model discloses a parallelly connected LED emergent dimmer circuit who does not divide LN line of many lamps relates to the LED illumination field, and this parallelly connected LED emergent dimmer circuit who does not divide LN line of many lamps includes: the power supply module is used for supplying alternating current and outputting the alternating current to the rectification filtering module through the protection module; the protection module is used for disconnecting the power supply loop when the input current exceeds a threshold value; the rectification filtering module is used for converting alternating current into direct current; the utility model has the advantages that: the utility model has the advantages that a plurality of LED emergency lamps are connected in parallel on the same line, and the automatic identification function of zero-fire line mixed connection is realized; accurate alternating current impedance input detection; perfect battery protection and management; the actual use voltage range is wide AC85-265V, and the global use can be realized; the circuit has an emergency three-level dimming function; and the number of peripheral auxiliary components of the IC is reduced, so that the design is simpler and more convenient, the cost is lower, the performance is more stable, the operation is convenient and simple, and the production efficiency is improved.
Description
Technical Field
The utility model relates to a LED illumination field specifically is a LED emergency dimming circuit of parallelly connected not branch LN line of many lamps.
Background
LED (Light Emitting Diode) lighting has been widely used, and contributes to energy conservation.
The conventional LED emergency lamp circuit has the advantages that under the condition that multiple lamps are connected in parallel in a mixed mode through LN (live wire and zero wire), some lamps are on during emergency, and improvement is needed under the condition that some lamps are not on.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a parallelly connected emergent dimmer circuit of LED that does not divide the LN line of many lamps to solve the problem that provides among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a LED emergency dimming circuit with multiple lamps connected in parallel and without LN lines comprises:
the power supply module is used for supplying alternating current and outputting the alternating current to the rectification filtering module through the protection module;
the protection module is used for disconnecting the power supply loop when the input current exceeds a threshold value;
the rectification filtering module is used for converting alternating current into direct current;
the constant current output module is used for outputting fixed adjustable current;
the voltage transformation output module is used for outputting voltage to supply power for the hybrid processing module;
the mixed connection processing module is used for ensuring normal light emission when the LED lighting module is mixed and connected to start;
the LED lighting module is used for LED luminous lighting;
the power supply module is connected with the protection module, the protection module is connected with the rectification filtering module, the rectification filtering module is connected with the constant current output module and the LED lighting module, the constant current output module is connected with the voltage transformation output module, the voltage transformation output module is connected with the mixed connection processing module, and the mixed connection processing module is connected with the LED lighting module.
As a further aspect of the present invention: the constant current output module comprises an integrated circuit U1, the model of the integrated circuit U1 is SS90561, a pin 4 of the integrated circuit U1 is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the cathode of a diode D1, one end of the output end of a rectification filter module, the anode of the diode D1 is connected with a pin 5 of the integrated circuit U1, a pin 6 of the integrated circuit U1 and a voltage transformation output module, a pin 2 of the integrated circuit U1 is connected with the other end of the output end of the rectification filter module, one end of a resistor R2, one end of an adjustable resistor RS1 and one end of an adjustable resistor RS2, the other end of the resistor R2 is connected with the pin 1 of the integrated circuit U1, and the other end of the adjustable resistor RS1 is connected with the other end of the adjustable resistor RS2 and the pin 7 of the integrated circuit U1.
As a further aspect of the present invention: the transformation output module comprises a transformer T1, one end of the input end of the transformer T1 is connected with the constant-current output module, the other end of the input end of the transformer T1 is connected with a common point A, one end of the output end of the transformer T1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with one end of a resistor R4, one end of a capacitor EC2 and a mixed connection processing module, the other end of the resistor R4 is connected with the common point A, the other end of the capacitor EC2 is connected with the common point A, and the other end of the output end of the transformer T1 is connected with the common point A.
As a further aspect of the present invention: the mixed connection processing module comprises an integrated circuit U2, the type of the integrated circuit U2 is IC2889F, a pin 5 of the integrated circuit U2 is connected with the positive electrode of a battery BAT, one end of a capacitor C1, the negative electrode of the battery BAT is connected with a common point A, the other end of the capacitor C1 is connected with the common point A, a pin 6 of the integrated circuit U2 is connected with the negative electrode of a diode D4, the positive electrode of the diode D4 is connected with a voltage transformation output module, a pin 8 of the integrated circuit U2 sequentially passes through a resistor R8, a protection module is connected with a zero line N, a pin 1 of the integrated circuit U2 sequentially passes through a resistor R6, a protection module is connected with a live wire L, a pin 3 of the integrated circuit U2 is connected with one end of an adjustable resistor RS3, one end of the adjustable resistor RS4 and one end of the adjustable resistor RS5, and the other end of the adjustable resistor RS3 is connected with the other end of the adjustable resistor RS4, the other end of the adjustable resistor RS5 and an LED lighting module.
As a further aspect of the present invention: the LED lighting module comprises a series light-emitting diode circuit LED1 and a parallel light-emitting diode circuit LED2, one end of the series light-emitting diode circuit LED1 is connected with the rectifying and filtering module, the other end of the series light-emitting diode circuit LED1 is connected with one end of the parallel light-emitting diode circuit LED2 and the mixed connection processing module, and the other end of the parallel light-emitting diode circuit LED2 is connected with a common point A.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model has the advantages that a plurality of LED emergency lamps are connected in parallel on the same line, and the automatic identification function of zero-fire line mixed connection is realized; accurate alternating current impedance input detection; perfect battery protection and management; the practical use voltage range is wide AC85-265V, and the global use can be realized; the circuit has an emergency three-level dimming function; and the number of peripheral auxiliary components of the IC is reduced, so that the design is simpler and more convenient, the cost is lower, the performance is more stable, the operation is convenient and simple, and the production efficiency is improved.
Drawings
Fig. 1 is a circuit diagram of an LED emergency dimming circuit with multiple lamps connected in parallel without dividing an LN line.
FIG. 2 is a schematic diagram of the internal structure of IC 2889F.
Fig. 3 is a pin diagram of IC 2889F.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, an LED emergency dimming circuit with multiple parallel lamps and no LN line division includes:
the power supply module is used for supplying alternating current and outputting the alternating current to the rectification filtering module through the protection module;
the protection module is used for disconnecting the power supply loop when the input current exceeds a threshold value;
the rectification filtering module is used for converting alternating current into direct current;
the constant current output module is used for outputting fixed adjustable current;
the voltage transformation output module is used for outputting voltage to supply power for the hybrid processing module;
the mixed connection processing module is used for ensuring normal light emission when the LED lighting module is mixed and connected to start;
the LED lighting module is used for LED luminous lighting;
the power supply module is connected with the protection module, the protection module is connected with the rectification filtering module, the rectification filtering module is connected with the constant current output module and the LED lighting module, the constant current output module is connected with the voltage transformation output module, the voltage transformation output module is connected with the mixed connection processing module, and the mixed connection processing module is connected with the LED lighting module.
In a specific embodiment: the power supply module introduces voltage through a live wire L and a zero line N, the protection module protects a circuit through fuses FR1 and FR2, and the rectification and filtering module is rectified through a rectifier DB1 and is subjected to filtering processing through a capacitor CB 1.
In this embodiment: referring to fig. 1, the constant current output module includes an integrated circuit U1, the model of the integrated circuit U1 is SS90561, a pin 4 of the integrated circuit U1 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to a cathode of a diode D1, one end of an output end of the rectification filter module, an anode of the diode D1 is connected to a pin 5 of the integrated circuit U1, a pin 6 of the integrated circuit U1, and the voltage transformation output module, a pin 2 of the integrated circuit U1 is connected to the other end of the output end of the rectification filter module, one end of a resistor R2, one end of an adjustable resistor RS1, and one end of an adjustable resistor RS2, the other end of the resistor R2 is connected to a pin 1 of the integrated circuit U1, and the other end of the adjustable resistor RS1 is connected to the other end of the adjustable resistor RS2 and a pin 7 of the integrated circuit U1.
The integrated circuit U1, as a current regulating device, can change the magnitude of its output current by changing the resistance values of the adjustable resistors RS1, RS 2.
In this embodiment: referring to fig. 1, the voltage transformation output module includes a transformer T1, one end of an input end of the transformer T1 is connected to the constant current output module, the other end of the input end of the transformer T1 is connected to the common point a, one end of an output end of the transformer T1 is connected to one end of a resistor R7, the other end of the resistor R7 is connected to an anode of a diode D2, a cathode of the diode D2 is connected to one end of a resistor R4, one end of a capacitor EC2, and the hybrid processing module, the other end of the resistor R4 is connected to the common point a, the other end of the capacitor EC2 is connected to the common point a, and the other end of the output end of the transformer T1 is connected to the common point a.
The transformer T1 outputs high-frequency oscillation, the current is limited through a resistor R7, the diode D1 rectifies the current, and the filtered current is output to the hybrid processing module through a capacitor EC2 to serve as a power supply source.
In this embodiment: referring to fig. 1, 2 and 3, the hybrid processing module includes an integrated circuit U2, the type of the integrated circuit U2 is IC2889F, a pin 5 of the integrated circuit U2 is connected to a positive electrode of a battery BAT and one end of a capacitor C1, a negative electrode of the battery BAT is connected to a common point a, the other end of the capacitor C1 is connected to the common point a, a pin 6 of the integrated circuit U2 is connected to a negative electrode of a diode D4, a positive electrode of the diode D4 is connected to a voltage transformation output module, a pin 8 of the integrated circuit U2 sequentially passes through a resistor R8 and a protection module to be connected to a neutral line N, a pin 1 of the integrated circuit U2 sequentially passes through a resistor R6 and a protection module to be connected to a live line L, a pin 3 of the integrated circuit U2 is connected to one end of an adjustable resistor RS3, one end of the adjustable resistor RS4 and one end of the adjustable resistor RS5, and the other end of the adjustable resistor RS3 is connected to the other end of the adjustable resistor RS4, the other end of the adjustable resistor RS5 and the LED lighting module.
The pin function diagram of IC2889F is as follows:
| pin number | Pin name | Function(s) |
| 1 | VN | AC |
| 2 | |
|
| 3 | EN | Output current/ |
| 4 | GND | Chip ground/ |
| 5 | BATP | Is connected with the positive end of the |
| 6 | VDD | Is connected with the output end of the |
| 7 | |
|
| 8 | VL | AC live wire input |
The IC2889F control schematic is shown below:
| alternating current milk transfusion system | EN output | NOTE |
| AC has | High resistance | |
| AC open circuit | High resistance | |
| AC short circuit | High level (Battery Voltage) | Impedance between L and N is less than threshold resistance |
(1) AC detection
IC2889F is a professional emergency detection control chip, can realize EN foot level switch according to the impedance state between VL and VN. When alternating voltage is input between VL and VN or no alternating voltage is input between VL and VN but the equivalent impedance of the detection line is larger than the threshold resistance, the internal switching tubes are all cut off, and the EN output is in a high-impedance state at the moment. EN outputs a high level only when the AC voltage is zero and the impedance between VL and VN is less than the threshold resistance.
(2) Battery management
A complete single lithium battery protection module is integrated in the IC2889F, and the function of recharging the 0V battery is supported. When the battery BAT is at a voltage between 0 and 2V, the charging current will limit the charging current to the battery BAT through an internal resistance equivalent to 100 ohms. When the voltage of the battery BAT is larger than 2V, the internal charging tube is opened, and the magnitude of the charging current is determined by the external charging source.
(3) Emergency output current
A 200 milliohm switch is built in the IC2889F, and when EN outputs a high level, a current limiting resistor (adjustable resistors RS3, RS4 and RS5 in the figure) can be connected between the EN PIN and the output of the LED lighting module in series to supply power to the LED lighting module.
(4) L/N mixed connection function
IC2889F has the zero live wire and thoughtlessly connects the automatic identification function, when a plurality of emergent lamps and lanterns were used in parallel, can connect input zero live wire to arbitrary one end at will, only need in the first time 1S interior fast switch once of passing through the alternating current, and all lamps and lanterns in same circuit can automatic identification and memory zero live wire state afterwards, accomplish to thoughtlessly connect the alignment mode, and this mode can be when battery voltage is less than 2V automatic re-setting.
(5) Emergency dimming
An emergency dimming module is integrated in the IC2889F, and a switch is turned on and off once in 5S in an emergency mode, so that the chip enters a dimming mode, the brightness is 100% -50% -25%, and the operation is cycled in sequence. If the switch switching time is greater than 5S, the brightness is 100% per switch on. Meanwhile, after the alternating current is switched on for one time under any brightness, the brightness of the emergency state is also defaulted to 100 percent.
(6) Line principle analysis
When alternating current is conducted to the live wire L and the zero wire N for the first time, the live wire L and the zero wire N are quickly switched on and off once within 1S second, all lamps in the same line can automatically recognize and memorize the zero-live wire state, and the mixed connection alignment mode is completed (the IC2889F internal alternating current input detection/emergency detection can automatically recognize and memorize the zero-live wire state). At this time, the alternating current passes through a fuse FR1/FR2 → VDR1 surge prevention detection → a rectifier BD1 → a capacitor CB1 for filtering → an integrated circuit U1 for detecting a constant current at high frequency (the adjustable resistor RS1/RS2 can adjust the magnitude of the output current, and the R2 can set the magnitude of the output no-load voltage) → transformer T1 high-frequency oscillation output → capacitor EC1 for filtering → LED1 light source → LED2 light source → floating ground. This forms a normally operating circuit.
While operating normally, a voltage of 3-5V is set by the secondary winding of the transformer T1 (since the voltage of the battery is set to 2.8-4.2V). The transformer T1 transforms voltage → the resistor R7 limits current → the diode D2 rectifies current → the capacitor EC2 filters → the integrated circuit U2 lithium battery management → the battery BAT charges the battery. The resistance values of the resistors R6 and R8 are set to 200K, at the moment, the output of the pin 3 (EN) of the IC2889F is low level, and no current is output from the emergency line.
When the live wire L and the zero wire N are powered off, and the impedance between a pin 1 (VL) and a pin 8 (VN) of the IC2889F is smaller than the threshold resistance, a pin 3 (EN) outputs high level. An emergency lighting circuit (normally, the LED1 is used as a normal lighting circuit) is formed by the 3 pins of the U2 → RS1/RS2/RS3 (emergency output current regulation) → LED2 light source → ground (IC 4 pin). At this point, the LEDs 2 are all lit because all LEDs are in parallel. Multiple lamps in parallel refers to many whole lamps rather than multiple LED light sources.
In this embodiment: referring to fig. 1, the LED lighting module includes a serial light emitting diode circuit LED1 and a parallel light emitting diode circuit LED2, one end of the serial light emitting diode circuit LED1 is connected to the rectifying and filtering module, the other end of the serial light emitting diode circuit LED1 is connected to one end of the parallel light emitting diode circuit LED2 and the hybrid processing module, and the other end of the parallel light emitting diode circuit LED2 is connected to the common point a.
When the live wire L and the zero line N are powered on, two ends of the series light-emitting tube circuit LED1 are connected with the live wire L and the zero line N through the protection module to emit light for illumination; when the live wire L and the zero wire N are powered off, the parallel light-emitting tube circuit LED2 is controlled by the IC2889F to finish light-emitting illumination.
The utility model discloses a theory of operation is: the power supply module supplies alternating current and outputs the alternating current to the rectification and filtering module through the protection module; the protection module disconnects the power supply loop when the input current exceeds a threshold value; the rectification filtering module converts alternating current into direct current; the constant current output module outputs fixed adjustable current; the voltage transformation output module outputs voltage to supply power for the hybrid processing module; the mixed connection processing module ensures normal light emission when the LED lighting module is mixed and started; the LED lighting module is used for LED lighting.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. The utility model provides a LED emergency dimming circuit of many lamps parallelly connected not branch LN line which characterized in that:
this emergent dimmer circuit of LED of parallelly connected not branch LN line of many lamps includes:
the power supply module is used for supplying alternating current and outputting the alternating current to the rectification filtering module through the protection module;
the protection module is used for disconnecting the power supply loop when the input current exceeds a threshold value;
the rectification filtering module is used for converting alternating current into direct current;
the constant current output module is used for outputting fixed adjustable current;
the voltage transformation output module is used for outputting voltage to supply power for the hybrid processing module;
the mixed connection processing module is used for ensuring normal luminescence when the LED lighting module is mixed and started;
the LED lighting module is used for LED luminous lighting;
the power supply module is connected with the protection module, the protection module is connected with the rectification filtering module, the rectification filtering module is connected with the constant current output module and the LED lighting module, the constant current output module is connected with the voltage transformation output module, the voltage transformation output module is connected with the mixed connection processing module, and the mixed connection processing module is connected with the LED lighting module.
2. The LED emergency dimming circuit with multiple lamps connected in parallel and no LN line as claimed in claim 1, wherein the constant current output module includes an integrated circuit U1, the model of the integrated circuit U1 is SS90561, pin 4 of the integrated circuit U1 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to the cathode of a diode D1 and one end of the output end of a rectifying and filtering module, the anode of the diode D1 is connected to pin 5 of the integrated circuit U1, pin 6 of the integrated circuit U1 and a voltage transformation output module, pin 2 of the integrated circuit U1 is connected to the other end of the output end of the rectifying and filtering module, one end of a resistor R2, one end of an adjustable resistor RS1 and one end of an adjustable resistor RS2, the other end of the resistor R2 is connected to pin 1 of the integrated circuit U1, and the other end of the adjustable resistor RS1 is connected to the other end of the adjustable resistor RS2 and pin 7 of the integrated circuit U1.
3. The LED emergency dimming circuit with multiple lamps connected in parallel without dividing LN line according to claim 1, wherein the transformer output module comprises a transformer T1, one end of the input end of the transformer T1 is connected with the constant current output module, the other end of the input end of the transformer T1 is connected with a common point A, one end of the output end of the transformer T1 is connected with one end of a resistor R7, the other end of the resistor R7 is connected with the anode of a diode D2, the cathode of the diode D2 is connected with one end of a resistor R4, one end of a capacitor EC2 and the mixed connection processing module, the other end of the resistor R4 is connected with the common point A, the other end of the capacitor EC2 is connected with the common point A, and the other end of the output end of the transformer T1 is connected with the common point A.
4. The LED emergency dimming circuit of claim 1, wherein the hybrid processing module comprises an integrated circuit U2, the type of the integrated circuit U2 is IC2889F, a pin No. 5 of the integrated circuit U2 is connected with a positive electrode of a battery BAT and one end of a capacitor C1, a negative electrode of the battery BAT is connected with a common point A, the other end of the capacitor C1 is connected with the common point A, a pin No. 6 of the integrated circuit U2 is connected with a negative electrode of a diode D4, a positive electrode of the diode D4 is connected with the voltage transformation output module, a pin No. 8 of the integrated circuit U2 sequentially passes through a resistor R8 and a protection module and is connected with a zero line N, a pin No. 1 of the integrated circuit U2 sequentially passes through a resistor R6 and the protection module and is connected with a live line L, a pin No. 3 of the integrated circuit U2 is connected with one end of an adjustable resistor RS3, one end of the adjustable resistor RS4 and one end of the adjustable resistor RS5, and the other end of the adjustable resistor RS3 is connected with the other end of the adjustable resistor RS4, the other end of the adjustable resistor RS5 and the LED lighting module.
5. The multi-lamp parallel LN-line-nondividing LED emergency dimming circuit according to claim 4, wherein the LED lighting module comprises a series light emitting tube circuit LED1 and a parallel light emitting tube circuit LED2, one end of the series light emitting tube circuit LED1 is connected with the rectifying and filtering module, the other end of the series light emitting tube circuit LED1 is connected with one end of the parallel light emitting tube circuit LED2 and the hybrid processing module, and the other end of the parallel light emitting tube circuit LED2 is connected with the common point A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320054256.5U CN218868412U (en) | 2023-01-09 | 2023-01-09 | LED emergency dimming circuit with multiple parallel lamps and no LN line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320054256.5U CN218868412U (en) | 2023-01-09 | 2023-01-09 | LED emergency dimming circuit with multiple parallel lamps and no LN line |
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| CN218868412U true CN218868412U (en) | 2023-04-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256588A (en) * | 2023-05-15 | 2023-06-13 | 深圳利普芯微电子有限公司 | Alternating current detection circuit, chip and emergency lighting system |
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2023
- 2023-01-09 CN CN202320054256.5U patent/CN218868412U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116256588A (en) * | 2023-05-15 | 2023-06-13 | 深圳利普芯微电子有限公司 | Alternating current detection circuit, chip and emergency lighting system |
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