Color temperature chip for detecting LED wall switch and circuit using same

Abstract

The invention provides a color temperature chip for detecting an LED wall switch. The chip comprises a power supply management module, a chip logic control module, a filter and power failure detection module and a drive module. The chip is provided with (N+4) groups of pins, and comprises a VDD pin, a CAP pin, a GND pin, a CS pin, and N drive output pins D1, D2, D3, ..., Dn. The VDD pin is connected with the CAP pin through a PMOS tube back-to-back structure inside the chip. N output ends of the drive module are connected with N drive output pins D1, D2, D3, ..., Dn of the chip. According to the invention, a resistor, a diode and a capacitor component outside the chip are reduced on the original application system, which saves the application cost of the system; the chip can be used for a variety of isolated or non-isolated different applications, which breaks the application limitation of the original scheme; groups of selectable ports are arranged on the drive output end of the chip; a variety of different drive tubes are packaged in the chip, and different voltage withstand values can meet the needs of a variety of different applications; and the chip can be in drive connection with N LED light strings (N is greater than 2) to realize multi-channel drive control.

Description

technical field [0001] The invention relates to the technical field of mobile phone structural parts, in particular to a color temperature chip for detecting an LED wall switch and a circuit using the color temperature chip. Background technique [0002] LED applications are divided into two categories: display and lighting. The new type of lighting that uses light-emitting diodes (LEDs) as the light source is called semiconductor lighting, or LED lighting for short, and the industry with semiconductor lighting as the main body is called the LED lighting industry. Under the double pull of domestic industrial policy and international market demand, China's LED lighting product market is developing rapidly. At present, global LED production capacity is shifting to China, and about 50% of the world's LED packaging and more than 60% of LED applications are carried out in China. my country has become the fastest growing region in the global semiconductor lighting industry. [...

AI Technical Summary

Problems solved by technology

[0008] Shortcomings of the prior art: A: Since the AC input is an AC signal, diode D1 is required for isolation, and the chip ports CLK, D1, and D2 cannot withstand high voltage, and the CLK port needs to be connected to a voltage dividing resistor; D1, D2 can only control constant current The power supply end of the driver chip, due to the withstand voltage of D1 and D2, limits the scope of application; if the voltage dividing resistor of the CLK port is soldered open circuit during the production process, the color temperature chip will be burned directly, causing the application system to be irreparable. Only the color temperature chip can be replaced, which is a waste of cost; B: There are only two output terminals of the color temperature chip, which cannot control multiple LED constant current drivers

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