A color temperature chip for detecting LED wall switches and a circuit using the color temperature chip

Abstract

The invention discloses a color temperature chip for detecting LED wall switches. The chip includes a power management module, a chip logic control module, a filtering and power-down detection module, and a drive module. The chip is also provided with (N+4) groups of pins, including VDD pin, CAP pin, GND pin, CS pin and N drive output pins D1, D2, D3, ... Dn, VDD pin is connected to CAP pin through PMOS tube back-to-back structure inside the chip, and the drive module The N output terminals of the chip are connected to the N driving output pins D1, D2, D3, ... Dn of the chip. The present invention reduces the resistance, diodes, and capacitor components around the chip in the original application system, saving system application costs; This chip can be used in a variety of isolated or non-isolated different application schemes, breaking through the application limitations of the original scheme; there are multiple groups of selectable ports at the drive output end of the chip, and various drive tubes are packaged in the chip. The withstand voltage value is different to meet the needs of various applications; this chip can drive and connect 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 for applying the color temperature chip. Background technique [0002] LED applications are divided into two categories: display and lighting. A new type of lighting with light-emitting diodes (LED) 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 LED lighting industry. Driven by both domestic industrial policies and international market demand, China's LED lighting product market is accelerating. At present, global LED production capacity is shifting to China. About 50% of global 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. [0003] Different types of LEDs can e...

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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