L9942 Description
The L9942 is an integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile look-up-table to allow a flexible adaptation of the stepper motor characteristics and intended operating conditions. It is possible to use different current profiles depending on target criteria: audible noise, vibrations, rotation speed or torque.
L9942 Key Features
- Two full bridges for max. 1.3 A load (RDSON = 500 m)
- Programmable current waveform with look-up table: 9 entries with 5 bit resolution
- Current regulation by integrated PWM controller and internal current sensing
- Programmable stepping mode: full, half, mini and microstepping
- Programmable slew rate for EMC and power dissipation optimization
- Programmable Fast-, Slow-, Mixed- and AutoDecay Mode
- Full-scale current programmable with 3 bit resolution
- Programmable stall detection
- Step clock input for reduced µController requirements
- Very low current consumption in standby mode IS < 3 µA, typ. Tj 85 °C
L9942 Applications
- 40 to 150 -40 to 150