Analog Analog Solutions—Robust Reliable Performance MC33772 6-Cell 14 V Battery Cell Controller Overview The MC33772 is a battery cell controller targeting 14 V Li-ion batteries with 3 to 6 cells in automotive and industrial application. With its unique performance and feature set it enables customers to replace traditional lead acid batteries in automotive applications or stationary systems by integrating all required functions for a cost optimized and reliable energy storage system. With advanced diagnostics and developed according to ISO26262, the MC33772 supports ASIL C for cell voltages, cell temperatures and the cell current. The device covers all kinds of Li-ion battery chemistries including LFPO, NMC and LTO and offers an exceptional accuracy performance on voltage and current measurement at 16-bit resolution. The device enables high precision impedance measurement by guaranteeing synchronization between cell voltage and current measurements within less than 130 µs as well as acquiring all cell voltages within 200 µs, all at 16-bit resolution. Additional to the I²C master interface to enable local data storage, it offers 7 GPIOs which can be used for digital input and output, trigger measurements or to measure analog temperature sensors in both ratiometric and non-ratiometric mode. The integrated cell balancing FETs support up to 300 mA balancing currents for all cell at the same time and controlled by individual timers up to 8 hours autonomously at 30 s resolution. Together with the MC33664 transformer physical layer (TPL) isolated interface device, the MC33772 can be used in a 2 Mbit high speed isolated daisy chain and even mixed with the MC33771 to enable flexible and performant HV battery systems in any possible topology Automotive Applications • 14 V Li-ion battery management systems • High-voltage battery management systems (> 800 V) Industrial Applications • Energy storage systems (ESS) • Uninterrupted power supply (UPS) • E-bikes, E-scooters by still maintaining the synchronization performance of the single device at the pack level. MC33772 and MC33664 High-Voltage Battery Management System MC33772 VPWR1 1 VPWR2 RDTX _OUT+ RDTX_OUTVCOM CT6 CB6 CB6:5_C CTn CBn CT1 CB2:1_C CB1 CTREF ISENSE+ ISENSE- Battery Reference GNDREF GNDFLG Battery Reference AGND DGND FAULT SDA SDL SO CSB SPI_COM_EN RESET SI/RDTX _IN+ EEPROM Battery Reference are/or may be 6 Cell Voltage Measure by Freescale’s CGND VPRE VANA AGND DGND CB2:1_C CB1 CTREF ISENSE+ Current Measure ISENSE- Battery Reference GNDREF GNDFLG Longevity Program. For Terms and RDTX _OUT+ RDTX_OUTVCOM CT1 Product Battery Reference CB6 CB6:5_C CTn CBn supported VCOM GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 CT6 CT5 These products T1 1:1 SCLK/RDTX_INVCP GNDCP MC33772 VPWR1 VPWR2 Product Longevity Program Battery Reference VANA CT5 6 Cell Voltage Measure VCOM CGND VPRE FAULT SDA SDL SO CSB SPI_COM_EN RESET SI/RDTX _IN+ VCOM Battery Pack Controller EEPROM MCU Battery Reference T1 1:1 T1 1:1 MC33664 SCLK/RDTX_INVCP GNDCP GPIO0 GPIO1 GPIO2 GPIO3 GPIO4 GPIO5 GPIO6 Conditions and to obtain a list of Battery Reference Battery Reference VCOM Battery Reference SPI1 SPI2 available products, visit freescale. com/productlongevity. MC33772 and MC33664 Product Differentiation Features Benefits Integrated current channel and Coulomb counting Reduces BOM for 14V Li-ion 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 Mbps) 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 Significant improvement of Battery diagnostics 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 ESD/EMC robustness avoids external components for robustness protection (BOM reduction, board space reduction) Supports ISO 26262 SafeAssure functional safety with single package solution Has functional verification and diagnostics Features Documentation • 5.0 V ≤ VPWR ≤ 30.0 V operation, 45.0 V Transient (for SPI communication) Freescale Document Number Title Description • 7.0 V ≤ VPWR ≤ 30.0 V Operation, 45.0 V Transient (for TPL communication) MC33772 Battery Cell Controller Data Sheet MC33664 Transformer Physical Layer Data Sheet SG1002 Analog Product Selector Guide Selector Guide SG187 Automotive Product Selector Guide Selector Guide SG200 Industrial Product Selector Guide Selector Guide • SPI or Isolated 2 MHz differential communication • 6x differential cells voltage and stack voltage measurements • Synchronized cell voltage/current measurement with Coulomb counting Development Tools • 7x ADC/GPIO/temperature sensor inputs Kit Number Description • Addressable on initialization KIT33772ASP1EVB Evaluation board • Onboard 300 mA passive cell balancing • Low-power modes • 48-pin QFP package Example: Typical 14 V Battery Management System using MC33772 Freescale: A Leader in Analog Solutions Expanding on more than 30 years of innovation, Freescale is a leading provider of high-performance products that use SMARTMOS technology combining digital, power and standard analog functions. Freescale supplies analog and power management ICs that are advancing the automotive, consumer, industrial and networking markets. Analog solutions interface with real world signals to control and drive complete embedded systems. For more information visit freescale.com/battery Freescale and the Freescale logo are trademarks of Freescale Semiconductor, Inc., Reg. U.S. Pat. & Tm. Off. SMARTMOS is a trademark of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © 2015 Freescale Semiconductor, Inc. Document Number: MC33772FS REV 2