TMC249 / TMC249A DATA SHEET (V2.09 / 2009-Jul-30)
1
TMC249/A – DATASHEET
High current microstep stepper motor driver
with stallGuard™, protection / diagnostics and
SPI Interface
TRINAMIC Motion Control GmbH & Co KG
Sternstraße 67
D – 20357 Hamburg
GERMANY
®
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 6000mA 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
i
as smart current control. The device can be controlled by a serial interface (SPI™ ) or by analog /
digital input signals. Short circuit, temperature, undervoltage and overvoltage protection are integrated.
More than 6000mA using 8 external MOS transistors (e.g. 4A 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 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
(for up to 64 microsteps via SPI see last manual page)
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 58V motor supply voltage using a few additional low cost components
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
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
