Infineon Technologies TLE4241GMXUMA1

Overview

TLE4241GMXUMA1 from Infineon Technologies is an AEC-Q100 qualified adjustable constant-current LED driver IC for automotive lighting, delivering 0–85 mA output current with ±5% accuracy, 9–16 V functional input range, and <1.5 V dropout at 85 mA. It integrates open-load detection, overtemperature shutdown, reverse-polarity protection, and PWM brightness control - enabling stable LED operation in exterior/interior lighting and blind-spot detection systems.

For engineers reviewing the TLE4241GMXUMA1 datasheet, TLE4241GMXUMA1 pinout, TLE4241GMXUMA1 application, or TLE4241GMXUMA1 equivalent, key selection considerations include its SET-pin dual-current mode (high/low), REF-resistor-based current programming, ST-status reporting, and PG-DSO-8 package thermal performance under automotive ambient conditions.

Technical Context

The device implements a precision current mirror architecture referenced to an internal 1.20 V bandgap, enabling output current IQ = (1.20 V / RREF) × 487 + 0.1 mA (typ.) in SET = H mode. It supports two programmable current levels via the SET pin and provides sleep-mode entry (<1 μA IQ) when PWM = L.

Status monitoring uses differential voltage sensing across the internal pass element (VI − VQ) to detect open-load conditions below Vdr,L threshold (~1.2 V) and drive the open-collector ST pin low; normal operation leaves ST high-impedance. Protection includes thermal shutdown at Tj ≥ 165°C (hysteresis ~15°C), short-circuit foldback, and reverse-polarity tolerance up to −42 V.

Key Specifications

Pinout & Package

Supplied in PG-DSO-8 (8-pin exposed-pad SOIC) package with 1.27 mm pitch, 5.0 × 6.0 mm body, and integrated thermal pad for enhanced heat dissipation in automotive environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar adjustable constant-current LED driver applications.

Compared with ASL3416SHN and TPS92630QPWPRQ1, the TLE4241GMXUMA1 offers simpler hardware-based current selection, smaller footprint, and autonomous fault reporting - making it optimal for cost-sensitive, single-string automotive lighting where MCU resources or board area are constrained.

Availability

TLE4241GMXUMA1 is available at Aetrix Electronics and suitable for automotive exterior lighting, interior ambient lighting, and ADAS-related illumination systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for TLE4241GMXUMA1 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, and industrial control ICs, with global manufacturing and quality certification aligned to ISO/TS 16949.

The TLE4241GMXUMA1 belongs to Infineon's LITIX™ Linear family - designed specifically for robust, analog-controlled LED current regulation in automotive lighting applications demanding high reliability and thermal resilience.

FAQ

What is the minimum external resistor value required for full-scale 85 mA output current?

The minimum RREF is 7 kΩ in SET = H mode, yielding IQ ≈ (1.20 V / 7 kΩ) × 487 + 0.1 mA ≈ 84 mA. This value is validated per datasheet Table 4 (Operating Range) and Figure 7, ensuring accuracy within ±5% across temperature and supply variations.

How does the ST pin behave during a short-circuit condition at the Q output?

During short-circuit, VI − VQ drops below the lower status threshold Vdr,L (~1.2 V), causing the ST pin to switch from high-impedance to active-low state (sinking up to 5 mA). This behavior is specified in Section 4.4 Electrical Characteristics and confirmed in Figure 6 timing diagrams.

Can the TLE4241GMXUMA1 drive LEDs with forward voltages exceeding 14 V?

No - the functional output voltage range is limited to 0–14 V (Table 3), meaning total LED string VF must remain ≤14 V. However, the device withstands up to 40 V reverse voltage at Q and 45 V absolute max input, supporting systems with transient overvoltage protection upstream.

Is the thermal pad of the PG-DSO-8 package electrically connected to any internal node?

No - the exposed thermal pad is internally isolated and intended solely for thermal conduction to the PCB. It must be soldered to a dedicated copper pour connected to GND for optimal heat dissipation, but no electrical connection exists between the pad and internal circuitry per package outline documentation.