L6470H Datasheet PDF - STMicroelectronics

Description
The L6470 device, 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 R DS(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