Boost regulator with six independent outputs
The LP8550TLX-A/NOPB: This is a DC-DC step-up (boost) regulator with an integrated switch, driving up to six LED channels from a single inductor. The 40V output ceiling means it can power series strings of LEDs — common in backlight panels where each string needs a consistent current. The 450 mA switch current limit sets the total power budget: at 40 V output, that is about 18 W before derating.
PWM dimming and supply range
Dimming is controlled via a PWM input — the internal logic modulates the switch duty cycle to adjust LED brightness without audible noise. The supply range spans 2.7 V to 22 V, covering single-cell Li-ion up to a 12 V rail. Operating temperature is -30°C to 85°C, which covers most indoor and automotive cabin applications but not under-hood extremes. The 25-DSBGA package (2.46 x 2.46 mm) is a fine-pitch BGA — a 4-layer PCB with micro-vias is recommended for fan-out.
Texas Instruments provides RoHS and REACH compliance documentation for this part.