Infineon Technologies TLE9879QXA20XUMA2

Overview

TLE9879QXA20XUMA2 from Infineon Technologies is an automotive-qualified 32-bit ARM Cortex-M3 microcontroller integrating LIN transceiver, 3-phase BLDC gate driver, and power management unit (PMU) for motor control. It delivers 50 MHz CPU frequency, 512 KB embedded Flash, 48 KB SRAM, and supports sensorless BEMF commutation. Designed for electric power steering (EPS), cooling fans, and HVAC blowers.

For engineers reviewing the TLE9879QXA20XUMA2 datasheet, TLE9879QXA20XUMA2 pinout, TLE9879QXA20XUMA2 application, or TLE9879QXA20XUMA2 equivalent, key selection criteria include integrated LIN physical layer compliance (ISO 17987-4), on-chip high-side/low-side gate drivers with 0.35 Ω typical R_DS(on), and ASIL-B capable safety features including windowed watchdog, memory protection unit, and voltage/temperature monitoring.

Technical Context

The device integrates a dedicated CCU6 module for precise 3-phase PWM generation with dead-time insertion and fault protection, alongside dual GPT12 timers supporting capture/compare and quadrature decoding. Its PMU provides three regulated supplies: 5.0 V (VDDP, 150 mA), 1.5 V (VDDC, 200 mA), and external 5.0 V bias (VDDEXT) for gate driver stage.

System-level timing uses a dual-oscillator architecture: a low-power RC oscillator (10 MHz ±10%) for wake-up and a high-precision crystal oscillator (1–20 MHz) for main clock generation. The LIN transceiver operates at 19.2 kbit/s nominal baud rate with bus fault detection and automatic resynchronization.

Key Specifications

Pinout & Package

Supplied in PG-VQFN-48-56 package (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad for motor control thermal dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive BLDC motor control applications.

Compared with STSPIN32F0B, TLE9879QXA20XUMA2 offers full LIN integration and higher drive capability; versus MC9S12ZVML128, it delivers superior computational throughput, reduced system-level complexity, and native ASIL-B support without external safety monitors.

Availability

TLE9879QXA20XUMA2 is available at Aetrix Electronics and suitable for electric power steering (EPS), HVAC blower control, cooling fan systems, and seat ventilation modules requiring stable component supply across automotive production lifecycles.

Supply support for TLE9879QXA20XUMA2 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 qualification infrastructure.

TLE9879QXA20XUMA2 belongs to the TLE987x family of automotive motor control ASSPs, designed specifically to integrate MCU, gate drivers, LIN, and power regulation into a single chip for cost- and space-constrained BLDC applications.

FAQ

What LIN protocol versions does TLE9879QXA20XUMA2 support?

The device implements a hardware LIN transceiver compliant with ISO 17987-4:2016, supporting LIN 2.2A, LIN 2.2B, and SAE J2602 protocols. It handles frame scheduling, checksum calculation (classic/enhanced), and automatic resynchronization without CPU overhead. No software stack is required for physical layer operation.

Does TLE9879QXA20XUMA2 require external gate resistors for MOSFET driving?

No external gate resistors are required for standard operation: internal drivers provide programmable slew-rate control and current limiting. However, a 10 Ω series resistor is recommended on HS/LS outputs for EMI suppression and ringing mitigation in high-dV/dt motor layouts, per Infineon Application Note AN478.

How is functional safety (ASIL-B) implemented in this device?

ASIL-B compliance is achieved through redundant clock monitoring, lockstep-capable watchdog (WDT1), memory protection unit (MPU) enforcing code/data separation, and independent analog monitors for VDDP, VDDC, and die temperature. All safety mechanisms are documented in the TLE9879 Safety Manual Rev. 1.1 (2018-05).

Can TLE9879QXA20XUMA2 operate without an external crystal?

Yes - it boots and runs using its internal 10 MHz RC oscillator, sufficient for LIN communication and basic motor control. For precise timing-critical functions (e.g., high-fidelity BEMF detection or synchronized ADC sampling), an external 8–20 MHz crystal must be connected to OSC_IN/OSC_OUT pins to enable the high-precision oscillator circuit (OSC_HP).