Infineon Technologies TLD1313ELXUMA1

Overview

TLD1313ELXUMA1 from Infineon Technologies is a 3-channel high-side LED current source IC for automotive exterior and interior lighting. It delivers up to 120 mA per channel with ±7% current accuracy at RSET = 12 kΩ, operates from 5.5 V to 40 V supply, and integrates open-load/short-to-GND diagnosis, thermal protection, and reverse-polarity protection. Used in tail/brake lights and dashboard illumination.

For engineers reviewing the TLD1313ELXUMA1 datasheet, TLD1313ELXUMA1 pinout, TLD1313ELXUMA1 application, or TLD1313ELXUMA1 equivalent, key selection criteria include channel count, diagnostic capability (ST pin status reporting), adjustable current via IN_SET resistor, sleep-mode current (0.1 µA), and PG-SSOP-14 exposed-pad thermal performance.

Technical Context

The TLD1313ELXUMA1 implements three independent high-side current-regulated output stages with integrated power transistors and current-sense feedback loops. Each channel maintains load-independent current regulation across supply variations (5.5–40 V) and temperature (−40°C to +150°C junction).

It features dual-function EN pin enabling sleep mode (<0.1 µA) and PWM dimming control, plus ST pin providing open-load and short-to-GND fault indication. Internal UVLO triggers at 5 V, and thermal shutdown activates at Tj ≥ 150°C with automatic recovery.

Key Specifications

Pinout & Package

Package: PG-SSOP-14 with exposed thermal pad (EP), lead pitch 0.65 mm, body size 5.0 × 6.0 mm. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-channel high-side LED driver applications.

Compared with ASL3416SHN and TPS92692QPWPRQ1, the TLD1313ELXUMA1 offers optimal balance of integrated diagnostics, compact 3-channel architecture, and minimal external components - ideal for cost-sensitive, space-constrained automotive lighting modules where pin count and layout simplicity are critical.

Availability

TLD1313ELXUMA1 is available at Aetrix Electronics and suitable for rear combination lamps, dashboard backlighting, side marker lighting, and interior ambient lighting requiring stable component supply across automotive production lifecycles.

Supply support for TLD1313ELXUMA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and sensor solutions, with global manufacturing and automotive qualification expertise.

The LITIX™Basic product line delivers robust, AEC-Q100 qualified LED drivers for cost-sensitive automotive lighting, emphasizing integration, diagnostics, and thermal resilience without MCU dependency.

FAQ

What is the function of the ST pin on TLD1313ELXUMA1?

The ST (Status) pin is an open-drain output that signals fault conditions: it pulls low during open-load (OL) or short-to-GND (SC-GND) events on any of the three output channels. It remains high during normal operation and does not indicate short-to-VS faults, which are handled internally without external reporting.

Can TLD1313ELXUMA1 drive RGB LED strings with independent current control?

Yes - each of the three OUTx pins provides independent, adjustable constant current (up to 120 mA) with matched accuracy (±7%). This allows precise luminance control for red, green, and blue LED strings in ambient lighting, provided thermal limits are observed with appropriate PCB copper area and heatsinking.

How does the EN pin support PWM dimming?

The EN pin accepts active-high logic signals for enable/disable control and also supports direct PWM input (0–100% duty cycle) to modulate LED brightness. When used for PWM, the internal current regulation remains active during ON periods, ensuring consistent current amplitude and eliminating flicker caused by supply ripple or thermal drift.

Is external current-sense resistor required for TLD1313ELXUMA1 operation?

No - the device uses an internal current mirror and reference to regulate output current based on the external resistor connected to IN_SET. No external sense resistor is needed at the LED path; the IN_SET resistor sets nominal current (e.g., 12 kΩ → 60 mA), and accuracy is ±7% over temperature and supply variation.