STMicroelectronics L99SM81V Programmable Stepper Motor Drivers

STMicroelectronics L99SM81V Programmable Stepper Motor Drivers are automotive-grade integrated drivers for two-phase bipolar stepper motors capable of current-controlled micro-stepping with programmable amplitude. These L99SM81V motor drivers feature programmable step and decay modes, integrated ADC, PWM frequency wobbling, 5V voltage regulator, integrated Serial Peripheral Interface (SPI), thermal warning, and shutdown. The L99SM81V programmable stepper motor drivers consist of an integrated ADC for coil voltage measurement and stall detection. These L99SM81V motor drivers regulate the current through the integrated PWM control with fully integrated current sensing.

The programmable inputs are used for direct control of direction, step clock, hold, and step modes. The integrated SPI adjusts device parameters, controls all operating modes, and read out diagnostic information. The STMicroelectronics L99SM81V Programmable Stepper Motor Drivers are ideal for adaptive front light systems, head-up displays, headlight position adjustment, and throttle valve control.

Features

Up to 1.35A current capability
Programmable step modes
Current regulation by integrated PWM control with fully integrated current sensing
Equivalent 10-bit resolution on current regulation loop
Four programmable decay modes
Three programmable inputs for direct control of step clock, direction, hold, and step modes
One programmable analog output
Two programmable digital outputs
Programmable MOSFETs switching speed