MC33772 and MC33664 Battery Cell
Controller and Transformer Physical Layer
The MC33772 battery six-cell controller and MC33664 transformer physical layer
solutions enable reliable, safe and bill of materials (BOM) optimized Li-ion cell
control applications with low-cost, robust, high-speed isolated communication.
TARGET APPLICATIONS
Automotive Applications
} High-voltage battery management systems (200 V–+800 V)
} 14 V Li-ion battery management systems
Industrial Applications
} Energy storage systems (ESS)
} Uninterrupted power supply (UPS)
} E-bikes, e-scooters
This solution addresses all existing battery management
system topologies that support centralized, distributed
daisy chain as well as high-speed and robust daisy chain.
It is compatible with 14 V Li-ion batteries with one analog
front end (AFE) and optional high-speed isolated or SPI
communications. These fully integrated battery monitoring
devices are for automotive and industrial mission-critical
applications.
High-speed and robust daisy chain is used as an alternative
to CAN solutions. Fast data acquisition and communication
to the pack controller can be achieved in only 0.86 ms for
the pack controller to acquire conversions from six cells,
seven external temperatures, the current and coulomb
counter. The MC33772 controller can work down to three
cells and up to six cells. Also, determination of individual
cell impedances in one shot is synchronized for cell
voltages and current measurements at 113 µs.
With functional verification and diagnostics, the MC33772
and MC33664 support ISO 26262 SafeAssure
®
functional
safety. Functional verification of cell measure, current
measure, cell terminal openings or leakage and ADC
precision checks are all performed.
FEATURES
} 5.0 V (7.0 V for TPL) < V
PWR
< 30 V operation, 42 V transient
for TPL communication
} Isolated 2 Mbps differential communication or 4 Mbps SPI
} Up to six cell voltage (differential) measurements and stack
voltage measurements
} Synchronized cell voltage/current measurement with
coulomb counting
} Seven ADC/GPIO/temperature sensor inputs
} Addressable on initialization
} Onboard 300 mA passive cell balancing low ohmic
MOSFETS with diagnostics
} Designed to support ISO 26262, up to ASIL D safety
capability
} Low-power modes
} 48-pin LQFP package
Robust, reliable
analog solutions
