STMicroelectronics L9942
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. The decay mode used in PWM-current control circuit can be programmed to slow-, fast-, mixed-and autodecay.| Part No. | L9942 |
|---|---|
| Datasheet | L9942 Download |
| Manufacturer |  STMicroelectronics |
| Description | Integrated stepper motor driver |
| Buy | Stock & Price |
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
● All outputs short circuit protected with openload, overload current, temperature warning and thermal shutdown
● The PWM signal of the internal PWM controller is available as digital output.
● All parameters are guaranteed for 3 V < Vcc < 5.3 V and for 7 V < Vs < 20 V
APPLICATIONS
Stepper motor driver for bipolar stepper motors in automotive applications like light levelling, Bending light and Throttle control.
