Description
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 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. Thanks 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.

FEATUREs
■ Operating voltage: 8 - 45 V
■ 7.0 A out peak current (3.0 A r.m.s.)
■ Low RDS(on) Power MOSFETs
■ Programmable speed profile and positioning
■ Programmable power MOS slew rate
■ Up to 1/128 microstepping
■ 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

APPLICATIONs
■ Bipolar stepper motors