CN203104915U - LED light intelligent controller - Google Patents

Abstract

The utility model discloses an LED (light emitting diode) lamp intelligent controller. An internal power circuit and an LED drive circuit in the LED lamp intelligent controller are together connected with an external switch power supply of the LED lamp intelligent controller through a switch power supply end K; an illuminance control circuit is connected with a control input end of the LED drive circuit through a control output end; and the LED drive circuit is connected with an anode of an external LED string through a drive output positive end and connected with a cathode of the external LED string through a drive output negative end. ISL29004 is used as an optical signal sensor, LM3402HV is used as a high-power LED driver, and components with a unified working voltage value are adopted so as to avoid additional filtration of infrared light to realize circuit simplification and show higher conversion. The luminous intensity of an LED lamp is automatically adjusted according to the intensity of the field natural light, and constant illuminance is always maintained. The LED lamp intelligent controller disclosed by the utility model is applied to automatic dimming control on the illumination of the LED lamp.

Description

LED light intelligent controller

technical field

The utility model relates to an automatic dimming control device for LED lighting.

Background technique

The disadvantages of the known automatic dimming control system for LED lighting are as follows: 1. Ordinary light sensors are often used to detect light signals. In addition to the influence of infrared light; ②The control circuit is relatively complicated, not only the controller is too large, but also affects the stability.

Contents of the invention

In order to overcome the shortcomings of the known LED lighting automatic dimming control system that additionally filter out infrared light and complex circuits, the utility model provides an intelligent controller for LED lights, which does not need to additionally filter out infrared light, The circuit is simple.

The technical scheme of the utility model is: the intelligent controller of the LED lamp has an internal power supply circuit, an LED driving circuit, an illumination detection circuit, and an illumination control circuit, wherein the internal power supply circuit and the LED driving circuit communicate with the LED lamp through the switching power supply terminal K together. The external switching power supply of the intelligent controller is connected, and the DC3.3V generated by the internal power supply circuit is connected to the input power supply terminal D' of the illuminance detection circuit and the illuminance control circuit through the output power supply terminal D, and the illuminance control circuit is connected to the LED drive circuit through the control output terminal P The control input terminal P' is connected, the LED driving circuit is connected to the positive pole of the external LED string through the driving output positive terminal L+, and the LED driving circuit is connected to the negative pole of the external LED string through the driving output negative terminal L-.

The utility model has the advantages of using ISL29004 as the optical signal sensor, LM3402HV as the high-power LED driver, and components with uniform working voltage values to avoid additional filtering of infrared light and realize circuit simplification. convert. The circuit is simple and the stability is high. The conversion efficiency of the circuit is as high as 98%. Automatically adjust the luminous intensity of LED lights according to the intensity of natural light on site, always maintain a constant illuminance, and save electricity to the greatest extent under the condition of meeting the illuminance requirements.

Description of drawings

Fig. 1 is the internal power circuit and LED drive circuit of the utility model.

Fig. 2 is the illuminance detection circuit and the illuminance control circuit of the utility model.

Detailed ways

In Figure 1 and Figure 2, the internal power supply circuit and the LED drive circuit are connected to the external switching power supply of the LED lamp intelligent controller through the switching power supply terminal K, and the DC3.3V generated by the internal power supply circuit is connected to the illuminance through the output power supply terminal D The detection circuit is connected to the input power terminal D' of the illuminance control circuit, and the illuminance control circuit is connected to the control input terminal P' of the LED driving circuit through the control output terminal P. The LED drive circuit is connected to the positive pole of the external LED string through the driving output positive terminal L+, and connected to the negative pole of the external LED string through the driving output negative terminal L-.

In Figure 1, the DC48V voltage from the external switching power supply of the LED light intelligent controller is grounded in parallel with capacitor C1, capacitor C2 and capacitor C5, connected to pin 1 of the integrated circuit LM78H03-500, and connected to the integrated circuit through resistor R1 Pin 6 of LM3402HV is connected to pin 8 of LM3402HV; pin 2 of integrated circuit LM78H03-500 is grounded, pin 3 of integrated circuit LM78H03-500 is grounded through the parallel circuit of capacitor C3 and capacitor C4, and outputs DC3.3V voltage through D terminal; Pin 7 of integrated circuit LM3402HV is grounded via capacitor C6, pin 3 is connected to terminal P in Figure 2 via P', pin 4 is grounded, pin 5 of integrated circuit LM3402HV is grounded via resistor R2, and connected to the drive output positive terminal L+ via capacitor C8. The negative terminal L-terminal of the driven output is connected to the negative pole of the external LED string; pin 1 of the integrated circuit LM3402HV is grounded through the cathode and anode of the thyristor DW1 in turn, connected to pin 2 through the capacitor C7, and connected to the left end of the inductor L1; the right end of the inductor L1 The driven output positive terminal L+ is connected to the positive terminal of the external LED string.

In Figure 2, pin 3 of the integrated circuit ISL29004 is grounded via potentiometer RX, pin 2 is grounded, pin 6 is suspended, pin 4 is grounded, pin 5 is grounded, pin 1 is connected to DC3.3V, pin 8 of the integrated circuit ISL29004 is connected via resistor R6 DC3.3V, connected to pin 1 of integrated circuit P82B96, pin 7 of integrated circuit ISL29004 is connected to DC3.3V through resistor R5, connected to pin 7 of integrated circuit P82B96; DC3.3V is grounded through capacitor C9; pin 4 of integrated circuit P82B96 is grounded, Pin 8 is connected to DC3.3V, pin 2 and pin 3 of integrated circuit P82B96 are connected in parallel and then pin 18 of integrated circuit P87LPC768, pin 2 of integrated circuit P82B96 is connected to DC3.3V through resistor R4, pin 5 and pin 6 of integrated circuit P82B96 Connected in parallel with pin 10 of the integrated circuit P87LPC768, connected to DC3.3V via resistor R3; pin 5 of the integrated circuit P87LPC768 is grounded, pin 15 is connected to DC3.3V, pin 1 is connected to the control input terminal P' of Figure 1 through the control output terminal P .

working principle:

① Drive: The DC voltage output by the external switching power supply (take DC48V as an example), through the LED drive circuit composed of integrated circuit LM3402HV and other components, convert it into a constant current of DC330mA, and drive 10 to 12 1W LEDs in series. It should be pointed out that the LED driving circuit composed of one LM3402HV can only drive one string of LEDs. In practice, the number of LM3402HVs should be determined according to the number of LED strings.

② Dimming: The sensor integrated circuit ISL29004 transmits the illuminance signal of a given position on the lighting site to the single-chip integrated circuit P87LPC768 through the buffer integrated circuit P82B96, and the single-chip integrated circuit P87LPC768 compares the signal with the preset given value , output the pulse width modulation signal PWM to the integrated circuit LM3402HV of the LED drive circuit to adjust the illuminance of the lighting scene and keep its value unchanged. Specifically, if the signal sensed by the integrated circuit ISL29004 is larger than the given value, the single-chip integrated circuit P87LPC768 reduces the PWM pulse width; if the signal sensed by the integrated circuit ISL29004 is smaller than the given value, the single-chip integrated circuit P87LPC768 increases Large PWM pulse width.

③Set the illuminance: By adjusting the reference resistor on the integrated circuit ISL29004 or modifying the program of the integrated circuit P87LPC768, the illuminance of the lighting site can be set as required.

Claims (1)

1. LED lamp intelligent controller, this LED lamp intelligent controller has interior power supply circuit, led drive circuit, the illuminance testing circuit, the illuminance control circuit, it is characterized in that: interior power supply circuit and led drive circuit join by the external switch power supply of Switching Power Supply end and this LED lamp intelligent controller jointly, the DC3.3V that interior power supply circuit produces links to each other with illuminance control circuit input supply terminal with the illuminance testing circuit by the out-put supply end, the illuminance control circuit links to each other with the control input end of led drive circuit by the control output end, and led drive circuit links to each other with the positive pole of external LED string by driving output plus terminal, led drive circuit links to each other with the negative pole of external LED string by driving the output negative terminal.

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