CNC FORUM

chaos · Wysłany: 2004-08-21, 10:15 **TMC 239**

High Current Microstep Stepper Motor Driver
with protection / diagnosis and SPI Interface

*Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals
*Short circuit and over temperature protection integrated
*Status flags for overcurrent, open load, over temperature, temperature pre-warning, undervoltage
*Integrated 4 bit DACs allow up to 16 times microstepping via SPI, any resolution via analog control
*Mixed decay feature for smooth motor operation
*Slope control user programmable to reduce electromagnetic emissions
*Chopper frequency programmable via a single capacitor or external clock
*Current control allows cool motor and driver operation
*Internal open load detector
*7V to 30V motor supply voltage
*More than 3000mA using 8 external MOS transistors
*External drivers can be added for higher motor voltages and higher currents (e.g. 75V, 10A)
*Only 4 external PMOS transistors required for unipolar operation
*3.3V or 5V operation for digital part
*Low power consumption via low RDS-ON power stage
*Standby and shutdown mode available

tmc239.pdf

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