Three-channel linear driver for automotive LED arrays
The TLD1313ELXUMA1 is a 3-channel linear LED driver from Infineon's LITIX™ Automotive series, delivering up to 120 mA per channel from a 5.5 V to 40 V supply rail. The 40 V output ceiling means it handles a 12 V automotive bus through load-dump transients without external clamping — the internal switch absorbs the surge. Each channel drives an independent LED string, so a single IC covers three separate lighting circuits — tail, brake, and turn on the same PCB, or three zones in a daytime-running-light bar. The linear topology keeps conducted and radiated EMI low, which simplifies the filter bill on the board.
Thermal and package integration for the board
Housed in a PG-SSOP-14-5 with an exposed pad, the part needs a thermal land on the PCB to pull heat from the junction. The exposed paddle is the primary thermal path — without a via array under the pad, the 120 mA per channel derates above 85 °C ambient. The 14-pin LSSOP footprint with 0.154-inch body width fits a standard two-layer board if the thermal pad gets dedicated copper on both sides. Surface-mount assembly with a no-clean flux profile works; the exposed pad demands a solder paste stencil aperture that covers at least 50 % of the pad area for void-free attach.
Lifecycle and compliance posture
ROHS3 compliant per the manufacturer declaration, which covers the full substance restriction list including the four phthalates. No official pin-compatible second source is registered in the LITIX™ family; the part is single-sourced from Infineon.