Infineon Technologies BTS5572EAUMA1

Overview

BTS5572EAUMA1 from Infineon Technologies is a five-channel automotive high-side smart power switch in PG-DSO-36-36 package, integrating N-channel vertical power MOSFETs with charge pumps and SPI-based diagnosis. It delivers configurable LED/bulb mode per channel (OUT0–OUT2), 100 mΩ max R_DS(ON) for channels 0–2 at 150 °C, 40 V overvoltage protection, and 3 µA standby current at 25 °C. It drives exterior lighting loads up to 3×27 W + 2×10 W in 12 V grounded automotive systems.

For engineers reviewing the BTS5572EAUMA1 datasheet, BTS5572EAUMA1 pinout, BTS5572EAUMA1 application, or BTS5572EAUMA1 equivalent, this page provides verified electrical parameters, SPI register-controlled load-type configuration, multiplexed current-sense diagnosis (IS), limp-home fail-safe activation (LHI), and daisy-chainable SPI interface timing up to 2 MHz - all critical for automotive lighting ECU design and relay replacement.

Technical Context

The BTS5572EAUMA1 implements five independent high-side power stages with integrated thermal shutdown, multi-step current limitation, and short-circuit protection. Each channel supports parallel PWM control via CMOS-compatible INx pins and configurable AND/OR logic combination.

SPI communication enables full configuration of load type (bulb vs. LED), current sense ratio (k_ILIS), and diagnosis enablement. The device features a multiplexed IS pin for proportional load current sensing, plus dedicated flags for overload and overtemperature in the 8-bit SPI diagnosis word.

Key Specifications

Pinout & Package

Package: PG-DSO-36-36 (exposed thermal pad, RoHS-compliant, AEC-Q100 qualified). Pin count: 36, with 5 high-side outputs distributed across multiple pins per channel for current sharing and thermal relief.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BTS5572EAUMA1, the BTS5573E offers channel-level flexibility but increases system component count and removes fail-safe LHI, while the TPS4H160-Q1 trades multiplexed diagnosis and load-mode optimization for higher absolute voltage rating and vendor-specific toolchain support.

Availability

BTS5572EAUMA1 is available at Aetrix Electronics and suitable for automotive lighting control, body electronics ECUs, and replacement of electromechanical relays requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for BTS5572EAUMA1 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 AEC-Q100 validation infrastructure.

The BTS5572EAUMA1 belongs to Infineon's SPOC (Smart Power Octal/Quintuple) family, designed specifically for intelligent, diagnostics-enabled high-side switching in automotive exterior lighting systems.

FAQ

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

The LHI pin is an active-high hardware fail-safe input that overrides all SPI and parallel control signals to force all five output channels into the ON state. This ensures minimum lighting functionality (e.g., brake or tail light operation) during critical ECU failure, meeting ASIL-B functional safety requirements defined in ISO 26262 for automotive lighting systems.

How does the IS (Diagnosis Output) pin work with five channels?

The IS pin delivers a time-multiplexed proportional current sense signal for all five channels. Its output is enabled or disabled via SPI command, and the current sense ratio (k_ILIS) is configurable per load type (bulb or LED). This eliminates the need for five separate analog sense lines, reducing PCB routing complexity and ADC resource usage in the host MCU.

Can BTS5572EAUMA1 drive both incandescent bulbs and LEDs on the same device?

Yes - channels OUT0, OUT1, and OUT2 support configurable bulb or LED mode via SPI register (HWCR.CTL), optimizing switching behavior and diagnosis sensitivity for each load type. Channels OUT3 and OUT4 are fixed for lower-current LED loads (260 mΩ R_DS(ON)), enabling mixed-load control on a single die without hardware changes.

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

The exposed thermal pad (pin 37) must be soldered to a large, low-thermal-resistance copper area on the PCB - typically connected to internal ground planes via ≥6 thermal vias. Junction-to-board thermal resistance (R_thJB) is 3.5 K/W; derating is required above 100 °C ambient to maintain T_j ≤ 150 °C under full load, especially for channels 0–2 delivering up to 27 W each.