Design method for high power and low noise intelligent adjustable constant current source

Aiming at the problem that small constant current source power, inconvenient dimming, and the noise caused by its switching characteristics is large, an intelligent optimized constant current driving design method with small size, high power, and good ripple effect is proposed. The design is improved on the basis of the previous low current, and the switching characteristics of the output current are converted to linear through feedback regulation, supplemented by switching the RCD loop (peak absorption loop) and constructing an optimized high-current loop PCB layout. The light source detects the current-to-pulse-width precision dimming, and the output can perfectly suppress the switching noise. The design method can realize remote digital dimming of the upper computer network, internal and external analog dimming, and intelligent control of multiple on-board cascades. Experiments show that the constant current drive output current can reach 10 A, the power can reach 370 W, the output current error is less than 1%, the drive light source has stable optical power, uniform illumination distribution, good ripple effect, stable and reliable.