LED Drivers

The DIOO DIO5661 is a 37V step-up (boost) constant current LED driver IC designed to drive up to 10 series-connected white LEDs or a 3×13 LED matrix with high brightness consistency, targeting display backlights, automotive interior lighting, and general LED panel applications. Operating at a 1.1MHz switching frequency with up to 86% conversion efficiency, the DIO5661 achieves a maximum output current limit of 1.3A while enabling compact external passive components — a single chip inductor and ceramic capacitors. A unique PWM-to-constant-current dimming mode accepts dimming frequencies from 200Hz to 200kHz for smooth, flicker-free brightness control. An integrated low-side power MOSFET minimises external component count, and built-in protections cover LED open-circuit, thermal shutdown, and cycle-by-cycle current limiting. ABL Semi supplies the DIO5661 as a 100% authentic DIOO product in SOT-23-6 and DFN-6 (2×2mm) with flexible MOQ.

The UMW PT4115 is a 30V, 1.2A step-down constant current LED driver IC operating in continuous inductor current conduction mode, designed to drive one or more series-connected LEDs at up to tens of watts with outstanding efficiency of up to 97%. Accepting a wide DC input range of 6V to 30V and switching at 1MHz, the PT4115 enables compact external passive components while maintaining output current accuracy of ±5%. A single multiplexed DIM pin supports LED on/off switching, analogue dimming, and wide-range PWM dimming — with the device entering an ultra-low standby current state when DIM voltage falls below 0.3V. An integrated power switch and high-side current sensing minimise external component count. ABL Semi supplies the UMW PT4115 as a 100% authentic product in SOT-89-5, with flexible MOQ and pin-to-pin compatibility to the original PT4115 and AL8805 series LED drivers.