text.skipToContent text.skipToNavigation




Infineon TLE9012AQU Battery Monitoring & Balancing IC

Achieve Zero CO2: Get the most out of your battery!

Infineon TLE9012AQU Battery Monitoring and Balancing IC is a multi-channel battery monitoring and balancing system IC that belongs to Infineon’s Battery Management Sensing IC product family.

Designed for Li-Ion battery packs used in many applications on the automotive world (Electric Vehicles of any kind MHEV, HEV, PHEV and BEV, etc), industrial (Energy storage systems) and consumer (i.e. ebike BMS, home energy storage, etc), the TLE9012AQU fulfills four main functions: cell voltage measurement, temperature measurement, cell balancing and isolated communication to main battery controller. By providing the necessary diagnosis tools to ensure proper function, the TLE9012AQU IC guarantees safety of the persons around the controlled battery.

TLE9012AQU IC Maximum Safety

Maximum Safety Customer Benefits

  • Functionally safe operation of battery under all conditions and stress scenarios
  • Optimize the battery’s operational safety margins in order to get the maximum energy out for longer rides and better cell lifetime

Maximum Safety Core Capabilities

  • ISO26262 certified uControllers, sensors and power components with inbuilt redundancy and self-checking
  • Precise current and voltage tracking for e.g. reliable isolation measurements
  • Quick detection of critical overcurrent and safe circuit separation.
  • Cryptographic measures ensure “battery is only doing what it is supposed to do”!

Maximum Safety Proof Points

  • ACQ 100 and beyond
  • Zero-defect programs
  • Matching ISO26262 ASIL

The Infineon TLE9012AQU IC can monitor up to 12 series-connected cells and supports hot-plugging and communication of more than 20 devices. This battery monitoring and balancing IC features two independent internal voltage references, configurable analog OV/UV comparators, internal open load detection, and end-to-end CRC secured communication. This IC is AEC-Q100 qualified and ISO 26262 ready that supports ASIL-C BMS safety applications for automotive designs. Typical applications include Mild Hybrid Electric Vehicle (MHEV), Hybrid Electric Vehicle (HEV), Plug-in Hybrid Electric Vehicle (PHEV), Battery Electric Vehicle (BEV), and 12V Li-Ion battery systems.

The Infineon TLE9012AQU IC offers 16-bit high-resolution ADC measurement for each cell, built-in noise filtering, and high-accuracy measurement for State-of-Charge (SoC) and State-of-Health (SoH) calculation. This integrated circuit consists of five temperature measurement channels for connection to external NTC and an integrated balancing switch allowing up to 150mA balancing current.

TLE9012AQU IC Features


  • Monitors up to 12 series connected cells
  • Supports communication of up to 20 devices
  • Supports hot plugging

Temperature measurement

  • 5 temperature measurement channels for connection to external NTC
  • Internal temperature measurement and monitoring

Communication Interface (iso UART)

  • Differential robust serial interface for communication between battery blocks
  • High speed communication up to 2 Mbps
  • Power balanced communication scheme


  • Integrated balancing switch allowing up to 150 mA balancing current

Voltage measurement

  • 16 bit high resolution ADC measurement for each cell
  • High accuracy measurement for SoC (State-of-Charge) and SoH (State-of-Health) calculation
  • Temperature compensated measurements
  • Built in noise filtering
  • Selectable measurement bit length

Safety features

  • Two independent internal voltage references
  • Block voltage measurement based on different ADC
  • Configurable analog OV/UV comparators
  • End-to-end CRC secured communication
  • CRC secured configuration registers
  • Internal open load detection
  • Emergency mode for communication
  • Green product (RoHS-compliant)
  • AEC-Q100 qualified
  • ISO-26262 ready, supporting ASIL-C BMS safety applications


  • Mild Hybrid Electric Vehicle (MHEV)
  • Hybrid Electric Vehicle (HEV)
  • Plug-in Hybrid Electric Vehicle (PHEV)
  • Battery Electric Vehicle (BEV)
  • 12V Li-Ion battery systems
  • Energy Storage System (ESS)
  • Home Energy Storage system
  • eBike battery management system


TLE9012AQU Block Diagram

Infineon TLE9012AQU Battery Monitoring Balancing IC Block Diagram