L6472H [STMicroelectronics]

L6472H Description

The advanced fully integrated L6472 device, achieved in analog mixed-signal technology, is appropriate for driving two-phase bipolar stepper motors with microstepping. With all of the power switches fitted with precise on-chip current sensing circuitry suited for non-dissipative current regulation and overcurrent protection, it combines a dual low RDS(on) DMOS complete bridge. A novel current control allows for an adaptive decay mode that outperforms conventional implementations to reach a 1/16 micro stepping. The user-defined motion profiles with acceleration, deceleration, speed, or goal location can be generated by the digital control core and readily programmed using a special register set.

L6472H Features

• Operating voltage: 8 - 45 V

• 7.0 A output peak current (3.0 A r.m.s.)

• Low RDS(on) power MOSFETs

• Programmable speed profile

• Programmable power MOSFET slew rate

• Up to 1/16 microstepping

• Predictive current control with adaptive decay

• Non dissipative current sensing

• SPI interface

• Low quiescent and standby currents

• Programmable non dissipative overcurrent protection on all power MOSFETs

• Two levels of overtemperature protection

L6472H Applications

• Power Management

• Consumer Electronics

• Portable Devices

• Industrial