NXP Semiconductors MC33774A Li-Ion Battery Cell Controller ICs
NXP Semiconductors MC33774A Li-Ion Battery Controller ICs include an independent internal architecture that achieves ASIL D functional safety targets at cell voltage and temperature measurements. These ICs support busbar monitoring with an input voltage as low as -3V. The MC33774A 18-channel ICs are qualified for less than 1.5 mV of voltage measurement error over the full temperature and cell voltage range. These ICs control passive cell balancing with up to 360mA current per channel and up to 125°C ambient temperature. The MC33774A 18-channel ICs allow maximizing asset utilization (such as ESS and EV Fleet) via fast real-time balancing.
The MC33774A 18-channel ICs feature an I2C interface to control external devices like EEPROMs, and up to 62 devices can be daisy-chained via the isolated ETPL bus. Typical applications include battery management systems (BMS), high-voltage battery management systems, energy storage systems, E-bikes, and E-scooters.
Features
- 4 to 18 cells per device
- On-board passive cell balancing
- Up to 300mA average cell balancing with diagnostics
- Automatic odd/even balancing sequence
- Timer, voltage, temperature, and PWM-controlled balancing
- Low-integrated balancing MOSFET RdsON
- ISO 26262 ASIL D support for cell voltage and temperature measurements
- External temperature and auxiliary voltage measurements
- I2C-bus master interface to control external devices like EEPROMs and security ICs
- Isolated daisy chain up to 62 nodes or SPI communication
- Diagnostics, functional safety, and robustness
Applications
- Automotive
- BMS
- High-voltage BMS
- Industrial
- E-bikes and E-scooters
- Energy storage systems
Videos
Block Diagram
Associated Boards
NXP Semiconductors RD33774ADSTEVB Evaluation Board
Cell Monitoring Unit (CMU) reference design with Electrical Transport Protocol link (ETPL).
NXP Semiconductors RD33774CNC3EVB Evaluation Board
Routes Transport Protocol link messages with CAN or CAN FD communication protocol.
NXP Semiconductors RD33774PDSTEVB Evaluation Board
Ideal for rapid prototyping of high-voltage battery management system hardware and software.
NXP Semiconductors RD33774PC3EVB Evaluation Board
Implements three MC33774ATP battery-cell controller ICs that monitor up to 18 cells.
Related Products
NXP Semiconductors Battery Management Systems (BMS)
Enhances the performance and ensures the safety of a battery pack composed of multiple cells.