AL8891Q

AL8891Q is a Diodes Incorporated synchronous buck LED driver in a TSSOP-16EP package — a wide-input constant-current regulator for automotive lamps, accepting 4.5 V to 65 V and delivering 2 A LED current with switching frequency adjustable from 200 kHz to 2.5 MHz. It is AEC-Q100 Grade 1 qualified and designed for CISPR 25 Class 5 emissions performance, which matters for lamp modules mounted near radio and ADAS receivers. The orderable code is AL8891QT16E-13 on 2,500-piece tape and reel. Selection advice: as a buck-only topology it suits lamp strings whose total forward voltage stays below the minimum input rail; strings that must keep running from a sagging battery below their forward voltage need a boost or buck-boost driver instead. The wide frequency range lets you place switching harmonics away from AM radio and sensor bands — fix the operating frequency in the design rather than letting it float, and follow the datasheet layout guidance around the exposed pad to hold the emissions performance. Parameters verified against Diodes Incorporated documentation.