18 Channel Li-Ion Battery Cell Controller IC ASIL D

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Block Diagram


MC33774 Block Diagram


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

    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

Part numbers include: MC33774ASA1AE, MC33774ASP1AE, MC33774ATA1AE, MC33774ATP1AE.

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.
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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