技术特性

• Two full bridges for max. 1.3 A load (RDSON = 500 mΩ)
• 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 Auto- Decay 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

功能框图