A4960 Automotive, Sensorless BLDC Controller Not for New Design This part is in production but has been determined to be NOT FOR NEW DESIGN. Sale of this part is currently restricted to existing customer programs already using the part. The part should not be purchased for new programs or designed into new applications. Samples are no longer available. Date of status change: A4960KJPTR-T January 29, 2014 Recommended Substitutions: For existing customer transition, and for new customers or new appli- cations, refer to A4960KJPTR-A-T. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no respon- sibility for its use nor for any infringements of patents or other rights of third parties which may result from its use.A4960 Automotive, Sensorless BLDC Controller Description Features and Benefits The A4960 is a three-phase, sensorless, brushless DC 3-phase BLDC sensorless start-up and commutation (BLDC) motor controller for use with external N-channel Gate drive for N-channel MOSFETs power MOSFETs and is specifically designed for automotive Integrated PWM current limit applications. 7 to 50 V supply voltage operating range Compatible with 3.3 V and 5 V logic The motor is driven using block commutation (trapezoidal Cross-conduction protection with adjustable dead time drive) where phase commutation is determined, without the Charge pump for low supply voltage operation need for independent position sensors, by monitoring the motor Extensive diagnostics output back-EMF. A programmable motor start-up scheme allows Low current sleep mode the A4960 to be adjusted for a wide range of motor and load combinations. Applications: An external bootstrap capacitor is used to provide the above Hydraulic pump battery supply voltage required for N-channel MOSFETs. Fuel pump An automatic internal bootstrap charge management scheme Urea pump ensures that the bootstrap capacitor is always sufficiently Blower fan charged for safe operation of the power MOSFETs. The power MOSFETs are protected from shoot-through by integrated Package: 32-pin LQFP with exposed crossover control and adjustable dead time. thermal pad (suffix JP) Integrated diagnostics provide indication of undervoltage, overtemperature, and power bridge faults and can be configured to protect the power MOSFETs under most short circuit conditions. Detailed diagnostics are available as a serial data word. The A4960 is supplied in a 32-pin LQFP with exposed pad for enhanced thermal dissipation (suffix JP). This package is lead (Pb) free, with 100% matte-tin leadframe plating Not to scale (suffix T). Typical Application V BAT V BAT A8450 Regulator SPI 3-Phase BLDC A4960 PWM Motor Micro- TACHO controller RESET FAULT A4960-DS, Rev. 2 April 24, 2017