LED driver simplifies area lighting design
National Semiconductor has introduced a new linear led driver, designed to simplify the design of high power, wide area lighting fixtures.
According to NSC, the LM3466 provides a complete system that drives each led string from any off the shelf ac/dc constant current power supply. It features a dynamic current equalising control scheme, a 70V, 1.5A N channel mosfet and has an input range of 6 to 70V.
In addition, the device includes a fault status output, input under voltage lockout, current limit and thermal shutdown protection. During an open (inactive) string state, each LM3466 automatically equalises current throughout remaining strings to maintain relatively constant output power. No binning of the leds is required.
