Boost LED driver with integrated switch
The LP39542TLX/NOPB is a DC-DC regulator LED driver from Texas Instruments, built around a step-up (boost) topology with an integrated switch rated at 900 mA. It drives up to 13 outputs, making it a fit for backlight or camera flash arrays in handheld devices. Switching at 2 MHz, the part keeps external inductor and capacitor values small — useful when board space in a phone or module is tight. The output voltage range spans 4 V to 5.3 V, which covers the forward voltage of most white LED strings in series.
PWM dimming and temperature grade
Dimming is handled via PWM, which avoids colour shift at low brightness compared to analog current reduction — a detail that matters when the driver is used in camera flash or display backlight. The operating temperature range of -30°C to 85°C covers consumer and some industrial ambient conditions, though not extended automotive. The 36-WFBGA package (supplier device package 36-uSMD) is a fine-pitch BGA; rework requires a hot-air profile suited to the 0.5 mm ball pitch. The part is surface-mount only and ROHS3 compliant.
ROHS3 compliance is confirmed. No additional compliance documentation (REACH, UL, IEC) is listed in the record.