Isolated Network High-Speed Transceiver
Design Files
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18 Channel Li-Ion Battery Cell Controller IC ASIL D
The MC33774 is an 18-Channel battery cell controller IC designed for the most demanding applications. The IC is lifetime qualified for less than 1.5 mV of voltage measurement error over the full temperature and cell voltage range. A fully redundant and independent internal architecture enables achieving ASIL D Functional Safety targets at cells voltage as well as for cells temperature measurements. Busbar monitoring is supported thanks to an input voltage ranging down to -3 V.
Configurable on-chip averaging of the high frequency voltage measurement signals acts as a digital filter and allows for a reduction in external filtering. Highly advanced functions are available to control passive cell balancing with up to 300mA per channel and all the way up to 125 degree C. ambient temperature. It gives the possibility for maximizing the assets utilization (e.g. ESS and EV Fleet) via fast real-time balancing. An I²C interface allows to control external devices, e.g.. EEPROMs. Up to 62 devices can be daisy-chained via the isolated ETPL bus.
Product Details
Features
Key Features
- From 4 to 18 cells per device
- ISO 26262 ASIL D support for cell voltage and temperature measurements
- External temperature and auxiliary voltage measurements
- On-board passive cell balancing
- Up to 300 mA average cell balancing with diagnostics
- Automatic odd/even balancing sequence
- Timer, voltage, temperature, PWM-controlled balancing
- Low Integrated Balancing MOSFET RdsON
- Isolated daisy chain up to 62 nodes or SPI communication
- Diagnostics, functional safety and robustness
Product Longevity Program
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This product is included in the NXP Product
Longevity program ensuring a stable supply of products for your embedded designs. The
MC33774 is included in the 15-year program
Comparison Table
| Parameter | 18-channel BCC, Advanced (MC33774ATA) | 18-channel BCC, Premium (MC33774ATP) |
|---|---|---|
| Voltage Channels | 4..18 | 4..18 |
| Supply V Range (Max) | 9 V..81 V (84 V) | 9 V..90 V (94 V) |
| Cell Input Voltage Range | -3 V to 5 V | -3 V to 5 V |
| Measurement Accuracy | ± 1 mV | ± 0.8 mV |
| Vpwr = 9 V..81 V | Vpwr = 9 V..90 V | |
| Vcell=0 V..3.7 V, -40 °C..85 °C | Vcell=0 V..3.7 V, -40 °C..85 °C | |
| Total Measurement Error after Lifetime | ± 2 mV | ± 1.5 mV |
| Vpwr=9 V..81 V | Vpwr=9 V..90 V | |
| Vcell=0 V..4.5 V, -40 °C..115 °C | Vcell=0 V..4.5 V, -40 °C..115 °C | |
| Measurement Averaging | Dynamic | Dynamic |
| Averaging | Averaging | |
| Samples | Samples | |
| Functional Safety | Redundant Architecture | Redundant Architecture |
| Single-Chip Cell | Single-Chip Cell | |
| Voltage and Temp. | Voltage and Temp. | |
| ASIL D | ASIL D | |
| Isolated Communication Speed | 2 Mbps | 2 Mbps |
| Communication Isolation | Inductive, Capacitive | Inductive, Capacitive |
| Max Nodes per Daisy Chain | 62 | 62 |
| CRC Bit | 16 | 16 |
| Comms Bit | 64...112 | 64...112 |
| Integrated Balancing | 360 mA peak(Tj = -40 °C to 125 °C) | 360 mA peak(Tj = -40 °C to 125 °C) |
| Balancing Sleep Mode | Yes | Yes |
| Integrated Balancing MOSFET (maximum RdsON) | 1.1 ohm | 1.1 ohm |
| GPIO / Analog Measurement Inputs | 9 | 9 |
| I²C Controller | Full I²C leader | Full I²C leader |
| Current Channels | No | No |
| Coulomb Counter | No | No |
| Package | 64-pin LQFP-EP | 64-pin LQFP-EP |
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Documentation
Quick reference to our documentation types.
Design Resources
Hardware
Quick reference to our
board types.
1-5 of 14 hardware offerings
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Evaluation and Development Boards18-Cell Battery Pack Emulator to Supply MC33774 BCC EVBs
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Evaluation and Development BoardsBattery Management System (BMS) Communication Monitoring and Debugging Toolkit
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Evaluation and Development BoardsEvaluation Kit - 33879,Configurable Octal Serial Switch
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Reference DesignHVBMS Centralized Cell Monitoring Unit Using ETPL with MC33774ATP
Software
Quick reference to our software types.
1 software file
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Simulation and Modeling Tools
Model-Based Design Toolbox (MBDT)
Note: For better experience, software downloads are recommended on desktop.