TMC246 DATA SHEET (V2.01 / Sep. 14th, 2005) 1
Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG
TMC 246/A – DATA SHEET
High Current Microstep Stepper Motor Driver
with sensorless stall detection, protection /
diagnosis and SPI Interface
TRINAMIC
®
Motion Control GmbH & Co KG
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D – 20357 Hamburg
GERMANY
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Features
The TMC246 / TMC246A (1) is a dual full bridge driver IC for bipolar stepper motor control
applications. The integrated unique sensorless stall detection (pat. pend.) StallGuard™ makes it a
good choice for applications, where a reference point is needed, but where a switch is not desired. Its
ability to predict an overload makes the TMC246 an optimum choice for drives, where a high reliability
is desired. The TMC246 is realized in a HVCMOS technology combined with Low-RDS-ON high
efficiency MOSFETs (pat. pend.). It allows to drive a coil current of up to 1500mA even at high
environment temperatures. Its low current consumption and high efficiency together with the miniature
package make it a perfect solution for embedded motion control and for battery powered devices.
Internal DACs allow microstepping as well as smart current control. The device can be controlled by a
serial interface (SPI™
i
) or by analog / digital input signals. Short circuit, temperature, undervoltage
and overvoltage protection are integrated.
• Sensorless stall detection StallGuard™ and load measurement integrated
• Control via SPI with easy-to-use 12 bit protocol or external analog / digital signals
• Short circuit, overvoltage and overtemperature 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
• 7V to 34V motor supply voltage (A-type)
• Up to 1500mA output current and more than 800mA at 105°C
• 3.3V or 5V operation for digital part
• Low power dissipation via low RDS-ON power stage
• Standby and shutdown mode available
(1) The term TMC246 in this datasheet always refers to the TMC246A and the TMC246. The major
differences in the older TMC246 are explicitly marked with “non-A-type”. The TMC246A brings a
number of enhancements and is fully backward compatible to the TMC246.
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