Analog, Mixed Signal, and Power Management MC33937 Three-phase Field Effect Transistor Pre-driver Applications MC33937 Simplified Application Drawing • Automotive systems • Cooling fan • Water pump • Actuator controls VSYS 33937A • Fuel pump VPUMP • Electro-hydraulic and electric power steering • Engine control VPWR • Motor control VLS Overview VDD Automotive system performance continues to increase significantly. Semiconductor components continue to meet this challenge. The MC33937 device is a field effect transistor (FET) pre-driver designed to drive three-phase motor control configurations with stable digital accuracy. It is easily configured for systems driving brushless DC (BLDC), permanent magnet (PM) or switched reluctance (SR) motors with or without sensors. Typical applications include the cooling fan, water pump, fuel pump, electro-hydraulic, and electric power steering. VSS The MC33937 device is extremely flexible and offers precise and complete control of speed, torque and power. It collects the logic and functions required to control and protect a DC motor with up to three phases. With its flexible configurability, the operation range is from below 6.0 V to over 55 V system voltage. The versatile SPI programming interface gives the user fine control of phase timing, programmable protection and detailed diagnostics. No other device is as well suited for fractional to integral horsepower motor control and places as much control in the hands of the user. The IC interfaces to a 5.0 V or 3.0 V MCU via six direct input control signals, an SPI port for device setup and asynchronous reset, enable, and interrupt signals. VSUP PUMP 3 3 3 MCU OR DSP PX_HS PX_LS PHASEX CS SI SCLK SO RST INT EN1 EN2 GND PA_HS_G PB_HS_G PC_HS_G PA_HS_S PB_HS_S PC_HS_S PA_LS_G PB_LS_G PC_LS_G PX_LS_S AMP_P AMP_N AMP_OUT RSEN Features Orderable Parts • Designed for 8.0 to 40 V operation Part Number • Extended operating range from 6.0 to 58 V covers 12 V, 24 V, and 42 V systems by design • Protection against reverse charge injection from CGD and CGS of external FETs MC33937APEK/R2 Temperature Range Package -40 °C to 135 °C 54 SOICW-EP Parametric Table Performance Typical Values Operating Voltage 6.0 to 58 V PWM Frequency DC to ≥ 20 kHz • Programmable dead time via the SPI port Gate Drive Capability >1.0 A • Simultaneous output capability via safe SPI commands Control/Communication SPI and parallel FET Drivers 6 • Charge pump to support full FET drive at low battery voltages Questions • Does your gate driver need to operate in environments up to 135 °C? • Do you need to operate at system voltages less than 8.0 V? • Do you need to operate at system voltages up to 58 V? • Does your system require a programmable dead time? • Do you need a strong gate drive for large FETs? • Do you need both a pre-driver and a current sense amplifier? • Do you need to be able to drive different types of motors with the same pre-driver? Development Tools Part Number Description KIT33937AEKEVBE Evaluation board to demonstrate the key features of MC33937 Documentation Document Number Type Description MC33937 Data Sheet Presents the specifications for the product SG1002 Selector Guide Analog and power management device comparison SG187 Selector Guide Automotive device comparison AN2409 Application Note Small Outline Integrated Circuit Fine Pitch Package Benefits • Precise, complete control of speed, torque, and power • Explicit control of each driver • Ideally suited for microcontroller interfacing • Increased diagnostic and fault reporting that protect the driver and load • Highly integrated solution • Robust solution for harsh environments • Improved reliability Freescale Semiconductor is a leading provider for over 25 years of highperformance products using SMARTMOS technology that combines digital, power and standard analog functions. The company supplies analog and power management ICs for the automotive, consumer, networking and industrial markets. Freescale’s analog and power ICs complement our broad portfolio of micro controllers, microprocessors, ZigBee technology, digital signal processors, sensors, with development tools and support to provide system solutions to customers. EK SUFFIX (Pb-FREE) 98ASA99334D 54-PIN SOICW-EP Learn More: For current information about Freescale products, please visit www.freescale.com. Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc. All other product or service names are the property of their respective owners. © Freescale Semiconductor, Inc., 2009-2013 All rights reserved. Document Number: MC33937FS, Rev. 3.0