TMC249_05 Datasheet, PDF (1/25 Pages) List of Unclassifed Manufacturers – High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnostics and SPI Interface

TMC249 / TMC249A DATA SHEET (V2.02 / Aug 12th, 2005)
1
TMC 249/A – DATA SHEET
High Current Microstep Stepper Motor Driver
with sensorless stall detection, protection /
diagnostics and SPI Interface
TRINAMIC^® Motion Control GmbH & Co KG
Sternstraße 67
D – 20357 Hamburg
GERMANY
T +49 - (0) 40 - 51 48 06 - 0
F +49 - (0) 40 - 51 48 06 - 60
WWW.TRINAMIC.COM
[e-mail]
Features
The TMC249 / TMC249A (1) is a dual full bridge driver IC for bipolar stepper motor control
applications. The TMC249 is realized in a HVCMOS technology and directly drives eight external Low-
RDS-ON high efficiency MOSFETs. It supports more than 4000mA coil current. The low power
dissipation makes the TMC249 an optimum choice for drives, where a high reliability is desired. With
additional drivers, motor current and voltage can be increased. 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 TMC249 an
optimum choice for drives, where a high reliability is desired. 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.
• More than 4000mA using 8 external MOS transistors (e.g. 2.8A RMS)
• 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)
• External drivers can be added for higher motor voltages and higher currents (e.g. 50V, 5A)
• 3.3V or 5V operation for digital part
• Low power dissipation via low RDS-ON power stage
• Standby and shutdown mode available
• Choice of SO28 or chip size MLF package
(1) The term TMC249 in this datasheet always refers to the TMC249A and the TMC249. The major
differences in the older TMC249 are explicitly marked with “non-A-type”. The TMC249A brings a
number of enhancements and is fully backward compatible to the TMC249.
Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG