L6470HTR

L6470HTR is a fully integrated microstepping motor driver with motion engine and SPI. It realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping. It integrates a dual low RDS(on) DMOS full bridge with all of the power switches equipped with an accurate onchip current sensing circuitry suitable for nondissipative current control and overcurrent protection. Due to a unique control system, a true 1/128 steps resolution is achieved. The digital control core can generate user defined motion profiles with acceleration, deceleration, speed or target position, easily programmed through a dedicated registers set. All commands and data registers, including those used to set analog values (i.e. current control value, current protection trip point, deadtime, PWM frequency, etc.) are sent through a standard 5-Mbit/s SPI. Application includes bipolar stepper motors.

• Low RDS(on) Power MOSFETs
• Programmable speed profile and positioning
• Programmable power MOS slew rate
• Sensorless stall detection, SPI interface
• Low quiescent and standby currents
• Programmable non-dissipative overcurrent protection on high and low-side
• Two-levels of overtemperature protection
• Motor supply voltage range from 8 to 45V (VSA = VSB = VS)
• 10V voltage swing for charge pump oscillator typical (VSA = VSB = 36V, VDD = 3.3V, TJ = 25°C)
• HTSSOP28 package, operating junction range from -40 to 150°C