Robust, reliable
analog solutions
The MC33664 transformer physical layer and MC33771 battery cell controller
solution enable reliable, safe low-cost Li-ion cell control applications with
affordable, robust and high-speed isolated communication.
MC33771 and MC33664 Battery Cell
Controller and Transformer Physical Layer
AUTOMOTIVE APPLICATIONS
}High-voltage battery management systems (> 800 V)
}48 V battery management systems
INDUSTRIAL APPLICATIONS
}Energy storage systems (ESS)
}Uninterrupted power supply (UPS)
}E-bikes, E-scooters
These fully integrated battery monitoring devices are for
automotive and industrial mission-critical applications.
Battery topology flexibility is supported with compatibility
including 48 V batteries with one analog front end (AFE).
High-speed and robust daisy chain provides a smart
alternative to CAN solutions. Fast data acquisition and
communication to the pack controller can be achieved in
only 3.0 ms for the pack controller to acquire conversions
from 96 cells. Also, determination of individual cell
impedances in one shot is synchronized for cell voltages
and current measurements within 114 μs.
With functional verification and diagnostics, the MC33664
transformer physical layer and and MC33771 battery cell
controller 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
}9.6 V ≤ VPWR ≤ 61.6 V operation, 75 V transient
}Isolated 2 Mbps differential communication or
4 Mbps SPI
}14 x differential cells voltage and stack voltage
measurements
}High-precision current measurement (+/- 1500 A) with
low resolution
}Coulomb counter
}Synchronized cell voltage/current measurement
100 μs skew
}7 x ADC/GPIO/temperature sensor inputs
}Addressable on initialization
}Onboard 300 mA passive cell balancing low ohmic
MOSFETS with diagnostics
}Low-power modes
}64-pin LQFP package
}Designed to support ISO 26262, up to ASIL D
safety capability
www.nxp.com/battery
NXP, the NXP logo and SafeAssure are trademarks of NXP B.V. All other product or service names are
the property of their respective owners. © 2014–2018 NXP B.V.
Document Number: MC33664FSA4 REV 4
MC33664 AND MC33771 PRODUCTS
DEVELOPMENT TOOLS:
FRDM33771BTPLEVB
FRDM33771BSPIEVB
FRDM33664BEVB
Features Benefits
Integrated current channel and coulomb counting Reduces bill of materials (BOM) for 48 V battery applications (only one AFE required)
Integrated current channel synchronized with cell
voltage measurements Determination of individual cell impedances in one shot for improved SoC/SoH prediction
Optional high-speed isolated or SPI communication Addresses all existing battery management system topologies (centralized, distributed daisy chain, distributed
CAN)
High-speed (2.0 Mbit/s) isolated high-speed
differential communication
Allows BOM cost reduction by transition from CAN to daisy chain without compromise on communication
speed
Fast data acquisition and communication to
pack controller
Determination of individual cell impedances in one shot, synchronized cell voltages and current measurements
within 114 μs
Robust against hot plug and random cell connection No pre-damaging of cell and no damaging of devices during customer battery/electronics assembly
ESD/EMC robustness Strong electrostatic discharge (ESD) protection and electromagnetic compatibility (EMC) avoid the need
for external components
Supports ISO 26262 SafeAssure® functional safety
with single package solution Has functional verification and diagnostics
Low-level drivers Simplifies software development and reduces switching cost
14
cells
14
cells
current
33771
33771
33664
HV BMS
MC33771 AND MC33664 HIGH-VOLTAGE BATTERY
MANAGEMENT SYSTEM
