L6474H

The L6474H is a fully integrated microstepping Motor Driver realized in analogue mixed signal technology, integrates a dual low RDS(on) DMOS full-bridge with all power switches equipped with an accurate on-chip current sensing circuitry suitable for non-dissipative current control and overcurrent protections. Thanks to a new current control, a 1/16 microstepping is achieved through an adaptive decay mode which outperforms traditional implementations. All data registers, including those used to set analogue values (current control value, current protection trip point, dead time) are sent through a standard 5Mbps SPI. A very rich set of protections (thermal, low bus voltage, overcurrent) makes the L6474 bullet-proof as required by the most demanding motor control applications.

• Low RDS(on) power MOSFETs
• Programmable power MOSFET slew rate
• Up to 1/16 microstepping
• Current control with adaptive decay
• Non-dissipative current sensing
• SPI interface
• Low quiescent and standby current
• Programmable non dissipative overcurrent protection on all power MOSFETs
• Two-level over-temperature protection
• 5W Total power dissipation (TA=25°C)

應用

Motor Drive & Control