Datasheet

6 TMC223 DATASHEET (V. 1.00 / May 3rd, 2007)

2.5 Sensorless Stall Detection

The TMC223 is equipped with a sensorless stall detection, to be used for noiseless reference search

without reference switch and motion monitoring purposes as detection of motor blocking.

2.6 Miscellaneous

Besides the main blocks the TMC223 contains the following:

• an internal charge pump used to drive the high side transistors.

• an internal oscillator running at 4 MHz +/- 10% to clock the two wire serial interface, the

positioning unit, and the main control block

• internal voltage reference for precise referencing

• a 5 Volts voltage regulator to supply the digital logic

• protection block featuring Thermal Shutdown, Power-On-Reset, etc.

• optional PWM jitter for reduction of EMI

• two programmable PWM frequencies (23 kHz and 46 kHz)