Infineon Technologies BTS5672EAUMA2

Overview

BTS5672EAUMA2 from Infineon Technologies is a six-channel automotive high-side smart power switch in PG-DSO-36-36 package, designed for 12 V grounded exterior lighting control. It delivers configurable LED/bulb mode per channel, 100–460 mΩ R_DS(ON) (channel-dependent), SPI daisy-chain interface up to 2 MHz, and integrated protection including overtemperature latch, short-circuit, overload, and reverse polarity (with external components).

For engineers reviewing the BTS5672EAUMA2 datasheet, BTS5672EAUMA2 pinout, BTS5672EAUMA2 application, or BTS5672EAUMA2 equivalent, this device supports fail-safe limp-home activation via LHI, multiplexed current sense (IS), and hardware-level diagnosis of overtemperature/overload via SPI register flags - critical for ASIL-B–compatible lighting ECU designs.

Technical Context

The BTS5672EAUMA2 integrates six N-channel vertical power MOSFETs with on-chip charge pumps, enabling high-side switching without external bootstrap circuitry. Each channel features independent AND/OR-combinable parallel PWM inputs and programmable load-type configuration (bulb vs. LED) to optimize switching behavior and current-sense accuracy across load types.

Its SPI interface supports daisy-chained topology for multi-device control with 8-bit command framing, while diagnosis includes multiplexed IS output (configurable per channel), short-circuit-to-VBB detection via switch bypass monitor, and real-time status reporting through a dedicated 8-bit diagnosis word containing OT/OL flags and channel-specific fault bits.

Key Specifications

Pinout & Package

Package: PG-DSO-36-36 (exposed thermal pad, RoHS-compliant, AEC-Q100 qualified). Pin count: 36 pins, including 6 high-side outputs with multi-pin bonding per channel for current sharing and thermal robustness.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTS5672EAUMA2, BTS5670E reduces integration but sacrifices fail-safe capability, while TPS4H160-Q1 offers higher per-channel accuracy and watchdog reliability at the cost of increased component count and routing overhead.

Availability

BTS5672EAUMA2 is available at Aetrix Electronics and suitable for automotive rear lighting control units, front parking light modules, license plate illumination systems, and turn signal flasher interfaces requiring stable component supply across extended temperature ranges (−40 °C to +150 °C).

Supply support for BTS5672EAUMA2 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 industrial control ICs, with global manufacturing and AEC-Q100 validation infrastructure.

The BTS5672EAUMA2 belongs to Infineon's SPOC (Smart Power Octal/Hex) family, engineered specifically for ASIL-B–compliant automotive lighting control with integrated diagnostics, fail-safe operation, and multi-load configurability.

FAQ

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

The LHI pin is an active-high safety input that forces all six output channels into ON state regardless of SPI commands or INx signals. It activates during ECU communication failure to maintain critical lighting functions like brake or tail lights. Internal pull-down ensures default OFF behavior when unconnected, meeting ISO 26262 fault-tolerant design requirements.

How does the multiplexed IS pin deliver per-channel current sense?

The IS pin outputs a time-multiplexed analog voltage proportional to load current, with channel selection controlled via SPI register ADDR.ISCTRL. Each channel's k_ILIS ratio is configurable (e.g., 1:2000 for bulbs, 1:5000 for LEDs) to maintain ±5% accuracy across 10 mA–3.5 A. The IS signal is disabled by default and must be enabled per channel via SPI.

Can BTS5672EAUMA2 drive both incandescent bulbs and LEDs on the same device?

Yes - channels 0–2 support hardware-configurable LED/bulb mode via SPI register ADDR.LOADCFG. Bulb mode uses slower switching edges and higher current thresholds to handle filament inrush; LED mode enables faster transitions and tighter current regulation. This allows one PCB design to serve multiple vehicle trims without hardware change.

What protection features are implemented without external components?

Integrated protections include overtemperature shutdown with latch, short-circuit detection with multi-step current limiting, overvoltage clamp at 40 V, loss-of-ground and loss-of-VBB detection, and ESD protection (±2 kV HBM). Reverse polarity protection requires external diode; inductive load clamping is handled internally via integrated clamp diodes on each output.