Shanghai long Mao new AC LED lamp dimming controller

Shanghai long Dms Microelectronic Ltd in following the development of success of solar LED street lamp dimming program, program dimming system developed further AC LED lamp. The system uses the same principle of pulse width modulation of LED (PWM) type program dimming, the new type of adjustable light controller SLM4801, can implement the dimming curve, so it can save a lot of energy. As shown in the following figure, if the curve dimming, at least 40% energy saving.

This controller is very simple, as long as the two power input line and a PWM light output line can be. Power line is added to the LED constant current drive DC voltage on the module, so it is positive (red) negative (black) points; and PWM dimming output line (blue) is added to the PWM dimming function of constant current LED driver module dimming control line.

With a controller can control several constant current control module can control the number of virtually no restrictions, because the controlled constant current module with 100k input impedance ohms above. The following figure is a schematic diagram of the control block diagram of multiple constant current modules.

So, in order to achieve dimming, in the end LED must use the light input constant current driving module with adjustable PWM control line. The company can provide constant current drive module with PWM dimming input control line, including boost and buck, the models are SLM2842Sd and SLM2842Jd.

The technology has been patented.