Infineon Technologies BTS5682EAUMA1

Overview

BTS5682EAUMA1 from Infineon Technologies is a six-channel automotive high-side smart power switch in PG-DSO-36-36 package, integrating N-channel vertical power MOSFETs with charge pumps and SMART technology. It delivers configurable LED/bulb mode per channel (0–2), cranking-capable output on channel 5 (down to 3.2 V), and SPI-based diagnosis with daisy-chain capability. Designed for 12 V grounded exterior lighting loads including brake lights, indicators, and license plate lamps.

For engineers reviewing the BTS5682EAUMA1 datasheet, BTS5682EAUMA1 pinout, BTS5682EAUMA1 application, or BTS5682EAUMA1 equivalent, this page provides verified electrical parameters, SPI register mapping context, load-type configuration logic, and fail-safe limp-home activation behavior - all critical for automotive lighting ECU design and relay replacement validation.

Technical Context

The device implements six independent high-side power stages with channel-specific R_DS(ON) values (100 mΩ for ch0–2, 260 mΩ for ch3–4, 460 mΩ for ch5) and integrated multi-step current limitation, thermal shutdown with dynamic sensing, and loss-of-ground/VBB detection. Each channel supports CMOS-compatible parallel PWM input with selectable AND/OR logic combination.

SPI interface operates up to 2 MHz with 8-bit command structure, enabling configuration of load type (bulb/LED), current sense ratio (k_ILIS), and enable/disable of multiplexed IS signal. Diagnosis includes overtemperature/overload flags in SPI word, short-circuit-to-VBB detection via switch bypass monitor, and fast LED-mode diagnosis (>2% duty cycle at 100 Hz).

Key Specifications

Pinout & Package

Package: PG-DSO-36-36 (exposed thermal pad, pins 19/36/37 for VBB, pin 37 exposed pad must be low-impedance connected to VBB and thermally anchored).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side smart power switch applications.

Compared with BTS50085-1TAD and BTS724G, BTS5682EAUMA1 uniquely combines six-channel integration, cranking-capable channel 5, software-configurable LED/bulb mode, and limp-home safety-making it the only option qualified for full exterior lighting consolidation in AEC-Q100 Grade 1 automotive systems.

Availability

BTS5682EAUMA1 is available at Aetrix Electronics and suitable for automotive lighting control, body control module (BCM) development, and enhanced relay replacement programs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 qualification.

Supply support for BTS5682EAUMA1 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 industrial control solutions, with global manufacturing and automotive qualification expertise.

The SPOC (Smart Power Octal/Hexa) product line targets automotive high-side switching applications, specifically engineered to replace electromechanical relays and discrete protection circuits in lighting and body electronics with integrated diagnostics and fail-safe features.

FAQ

What is the purpose of the LHI (Limp Home Input) pin?

The LHI pin is an active-high safety input that forces the device into a predefined fail-safe output state (e.g., all channels ON or specific channels ON) when the main microcontroller fails or SPI communication is lost. It connects directly to a system watchdog or backup controller and requires no external pull-up due to its integrated pull-down. This ensures critical lighting functions remain operational during ECU faults.

How does the device handle LED versus incandescent bulb loads?

The BTS5682EAUMA1 allows per-channel (0–2) configuration via SPI registers to select LED or bulb mode, adjusting slew rate, current-sense ratio (k_ILIS), and diagnosis thresholds accordingly. In LED mode, it enables faster fault detection (>2% duty cycle at 100 Hz), while bulb mode optimizes inrush handling and thermal derating for filament loads - all without hardware changes.

Can multiple BTS5682EAUMA1 devices be connected in daisy chain?

Yes - the integrated SPI interface supports daisy-chain topology using SO-to-SI connections between devices, with shared CS, SCLK, and SI lines. This reduces MCU GPIO usage and simplifies PCB layout for multi-device lighting controllers. Each device retains individual addressability via hardware pin strapping or SPI register configuration, enabling synchronized status reads and command writes across up to 16 devices.

What thermal management is required for the PG-DSO-36-36 package?

The exposed thermal pad (pin 37) must be soldered to a large copper pour connected to the VBB net, with ≥6 thermal vias (0.3 mm diameter) to inner ground/power planes. Junction-to-board thermal resistance is 12 K/W minimum; for continuous 27 W lamp loads on ch0–2, board-level thermal design must maintain T_j ≤ 150 °C under worst-case ambient (85 °C) and airflow conditions. No heatsink is required if PCB copper area exceeds 400 mm².