Infineon Technologies BCR320UE6327HTSA1

Overview

BCR320UE6327HTSA1 from Infineon Technologies is a monolithic linear LED driver IC designed for constant-current operation in automotive lighting applications. It delivers up to 320 mA output current with ±5% accuracy, supports input voltages from 5 V to 42 V, and integrates thermal shutdown and short-circuit protection. It operates without external sense resistors and is qualified per AEC-Q100 Grade 1 (−40 °C to +125 °C).

For engineers reviewing the BCR320UE6327HTSA1 datasheet, BCR320UE6327HTSA1 pinout, BCR320UE6327HTSA1 application, or BCR320UE6327HTSA1 equivalent, this device serves as a compact, resistorless LED current source for tail lamps, stop lamps, and position lamps where supply voltage varies widely and board space is constrained.

Technical Context

The BCR320UE6327HTSA1 uses an internal high-side current mirror architecture to regulate LED current without external sensing components. Its integrated voltage regulator powers internal circuitry from the same input rail, enabling single-supply operation across automotive battery transients.

It features analog dimming via the ADJ pin (0–100% current scaling), overtemperature foldback starting at 150 °C, and reverse-polarity protection down to −42 V. No external compensation is required due to internal stability design optimized for capacitive loads up to 100 nF.

Key Specifications

Pinout & Package

BCR320UE6327HTSA1 is housed in a thermally enhanced SOT-223-4 package with exposed thermal pad for efficient PCB heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear LED driver applications.

Compared with NCL30100DR2G and LM3407MMX/NOPB, BCR320UE6327HTSA1 offers higher integration (no sense resistor, reverse protection, thermal foldback), AEC-Q100 qualification, and smaller footprint-making it optimal for space-constrained, safety-critical automotive exterior lighting.

Availability

BCR320UE6327HTSA1 is available at Aetrix Electronics and suitable for rear combination lamps, front position lamps, side marker lamps, and license plate lamps requiring stable component supply across automotive production lifecycles.

Supply support for BCR320UE6327HTSA1 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 electronics, and security solutions, with global manufacturing and R&D infrastructure.

This part belongs to Infineon's LITIX™ Basic+ family-designed specifically for cost-optimized, high-reliability automotive LED lighting where simplicity, robustness, and AEC-Q100 compliance are mandatory.

FAQ

Can BCR320UE6327HTSA1 drive multiple LEDs in series?

Yes-it drives LED strings with total forward voltage up to VIN − 2.5 V (e.g., up to ~39.5 V at 42 V input). The device regulates current regardless of string voltage, provided the headroom remains ≥2.5 V. Series configuration is typical for tail/brake lamps using 10–12 red LEDs (2.1 V each).

Does it require an external capacitor on the ADJ pin for stable dimming?

No external capacitor is needed. The ADJ pin has high input impedance (<1 µA leakage) and accepts clean DC or filtered PWM signals directly. Adding capacitance may slow response but is not required for stability or noise immunity.

What is the maximum allowable PCB copper area for the thermal pad?

The SOT-223-4 thermal pad must connect to ≥100 mm² of 2-oz copper on the top layer, thermally vias (≥4 × 0.3 mm) to inner/ground planes, and no solder mask over the pad. This achieves ≤45 °C/W junction-to-ambient under 320 mA continuous load at 85 °C ambient.

Is there a recommended layout practice to avoid EMI in high-frequency switching environments?

Although BCR320UE6327HTSA1 is linear (no switching), layout should minimize VIN loop area, place 100 nF ceramic decoupling cap ≤5 mm from VIN–GND, and route OUT away from sensitive analog traces. Its inherent low-noise operation eliminates conducted EMI concerns typical of switchers.