ST L6470微步进马达驱动解决方案.docx

ST L6470 ???????????????????,????,???? ST ??? L6470 ????????????,????????,???????? SPI ??,????????????????????. L6470 ???? 4-45V, ???? ( A .), ? RDSon ?? MOSFET, ?? 1/12 8???,?????????.????? L647 0????,???,?????????????,???????????????. AO-Electronics ??????? ???? 70: Fully integrated microstepping motor driver with motion engine and SPI The L6470, 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 RDSon DMOS full bridge with all of the power switches equipped with an accurate on chip current sensing circuitry suitable for non dissipative current control and overcurrent protections. Thanks toa 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. mands and data registers, including those used to set analogue values (. current control value, current protection trip point, dead time, PWM frequency etc.) are sent through a standard 5Mbit/s SPI. A very rich set of protections (thermal, low bus voltage, overcurrent, motor stall) allows designing a fully protected application