2024-01-05

LED lighting driver chip overview

LED lighting driver chip is the core component used in led lighting products. In recent years, the emergence of LED lighting driver chips has enabled LED driver power sources to be designed and produced from the early use of universal switching voltage regulator power chips + constant current chips. 2008 began to design and produce LED lighting dedicated isolation and non-isolated switching constant current chip, only one integrated chip can design and produce LED lighting source dedicated power supply, to meet the LED lamp bead work needs constant current, and E27, A60, E14 and other international standard lamp cap space to eliminate electrolytic capacitors, transformers, inductors and other devices, as a drive The application circuit of the power supply is simple and the product is low-cost.

Over the years, the integrated circuit chips used by LED lighting driver chips have developed rapidly. In order to meet the needs of a wide variety of light sources and lamps, the switching constant current driver chip is subdivided into a variety of isolating switch constant current chips, non-isolating switch constant current chips; And switch constant current controller chip, can be external MOS, the output current can be designed on demand. The high-voltage linear constant current driver chip has developed N-segment high-voltage linear constant current chip, high-voltage linear constant power chip, two-port linear constant current chip, and linear constant current controller chip, which can be external MOS, and the output current can be sized according to demand.

The common LED driver chip is borrowed from the general power driver chip, the real driver chip designed for the LED light source is still very few, many companies are still in the design, it is expected that there may be many listed next year. In the current LED drive technology, LDO is driven by a voltage regulation method, which is unfavorable to the life of the LED current type device. DC/DC constant current source and AC/DC constant current source may be one of the most ideal solutions known at present, but also the focus of current designers. Throughout the LED constant current drive technology, there are two types of driver chips are the inevitable development trend: one is the DC/DC step-down LED driver chip produced by the high voltage process, and its input voltage range is DC60-100V. The drive mode can meet the needs of multi-string and less parallel LED drivers. The second type is the AC/DC driver chip composed of power factor correction (PFC)+PWM or PFM control mode. They will show strong vitality in a new generation of LED light sources. The project realizes an efficient AC/DC or DC/DC conversion chip for white LED lighting by using the latest 800VUHV process