Overview
The L9935, specifically the E-L9935013TR, is a two-phase stepper motor driver circuit designed by STMicroelectronics. This device is optimized for driving bipolar stepper motors and can be controlled via a serial interface (SPI). It integrates all necessary protections to ensure a well-protected system, including short-circuit, over-temperature, and cross-conduction protections.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Full Bridge Outputs | 2 x 1.1 A | A |
| Max. Operating Supply Voltage | 24 | V |
| Standby Consumption | Typically 40 | μA |
| Package Type | PowerSO-20 | |
| Operating Temperature (min) | -40 | °C |
| Operating Temperature (max) | 150 | °C |
| RoHS Compliance | Ecopack2 |
Key Features
- 2 x 1.1 A full bridge outputs
- Integrated chopping current regulation
- Minimized power dissipation during flyback
- Output stages with controlled output voltage slopes to reduce electromagnetic radiation
- Short-circuit protection of all outputs
- Error-flag for over load, open load, and over temperature pre alarm
- Delayed channel switch on to reduce peak currents
- Serial interface (SPI) for control
Applications
The L9935 is suitable for a variety of applications that require precise control of bipolar stepper motors. These include:
- Automotive systems requiring stepper motor control
- Industrial automation and robotics
- Medical devices that use stepper motors for precise movement
- Consumer electronics such as printers and scanners
Q & A
- What type of motors does the L9935 support?
The L9935 supports bipolar stepper motors.
- How is the L9935 controlled?
The L9935 can be controlled via a serial interface (SPI).
- What are the key protections integrated into the L9935?
The L9935 includes protections for short-circuit, over-temperature, and cross-conduction.
- What is the maximum operating supply voltage for the L9935?
The maximum operating supply voltage is 24 V.
- What is the standby consumption of the L9935?
The standby consumption is typically 40 μA.
- What package type is the L9935 available in?
The L9935 is available in the PowerSO-20 package.
- Is the L9935 RoHS compliant?
Yes, the L9935 is RoHS compliant with an Ecopack2 rating.
- What are the operating temperature ranges for the L9935?
The operating temperature range is from -40°C to 150°C.
- How does the L9935 reduce electromagnetic radiation?
The L9935 reduces electromagnetic radiation through output stages with controlled output voltage slopes.
- What is the purpose of the delayed channel switch on in the L9935?
The delayed channel switch on reduces peak currents.
