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Infineon plans HV microcontroller for EV BMS designs

Infineon plans HV microcontroller for EV BMS designs

Business news |
By Nick Flaherty



Infineon Technologies is developing a family of High Voltage Precision Analog (HVPA) version of its PSoC 4 microcontrollers for battery management system (BMS) designs using lithium ion batteries for electric vehicles.

The Infineon HV microcontroller portfolio will soon include several products for monitoring and managing high voltage (400 V and above) and low voltage (12 V/48 V) batteries for EV BMS designs.

The first device in the family works with 12V lead acid batteries. The PSoC 4 HVPA-144K microcontroller provides a fully integrated embedded system for monitoring and managing automotive 12 V lead-acid batteries, which is critical for the 12 V power supply of vehicle electrical systems. The new microcontroller is ISO26262 compliant, enabling compact and safe intelligent battery sensing and battery management in modern vehicles.

Dual high-resolution sigma-delta ADCs, together with four digital filtering channels, enable accurate measurement of the battery’s state-of-charge (SoC) and state-of-health (SoH) by measuring key parameters such as voltage, current, and temperature with an accuracy of up to ±0.1 percent.

The lead acid device features two programmable gain amplifiers (PGAs) with automatic gain control, allowing fully autonomous control of the analog front end without software intervention. The use of shunt-based current sensing for batteries provides a higher accuracy than conventional Hall sensors.

An integrated 12 V LDO (42 V tolerant) allows the device to be supplied directly from the 12 V lead-acid battery without the need for an external power supply. An integrated transceiver allows direct communication with the LIN bus. The product meets the functional safety requirements of ASIL-C according to ISO26262.

The microcontroller is based around a 48MHz ARM Cortex-M0+ core with 128 KB of code flash, 8 KB of data flash and 8 KB of SRAM, all with ECC. The PSoC 4 HVPA-144K also includes digital peripherals such as four timers/counters/PWMs and a serial communication block that can be configured as an I2C/SPI/UART.

The Infineon Automotive Peripheral Driver Library (AutoPDL) and Safety Library (SafeTlib) are developed according to the standard automotive software development process and are both A-SPICE compliant, following the MISRA 2012 AMD1 and CERT C, and ISO26262 compliant.

The PSoC 4 HVPA-144K is now available in a compact 32-QFN (6×6 mm²) package with up to 9 GPIOs. For an easy start of development, an evaluation board is also available.

www.infineon.com/psochvpa144k.

 

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