TMC249 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – High Current Microstep Stepper Motor Driver with Sensorless Stall D e t e c t i o n ,P rotection / Diagnosis and SPI Interface

Motion
Control
Integrated
Circuit
249 TMC
TRINAMIC
IM I C R O C H I P S I G M B H
Features
TMC249 Application Environment
High Current Microstep Stepper Motor Driver with Sensorless Stall
Detection,Protection / Diagnosis and SPI Interface
The TMC249 is a dual full bridge driver IC
for bipolar stepper motor control applica-
tions. The TMC249 is realized in a HVC-
MOS technology and directly
drives eight external Low-RDS-ON
high efficiency MOSFETs. It sup-
ports up to 4000mA coil current.
With additional drivers, motor current and
voltage can be increased. The driver tran-
sistors can be chosen depending on output
current or environment temperature. The
integrated unique sensorless stall detec-
tion (pat.fi.) 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 relia-
bility is desired. Internal DACs allow
microstepping as well as smart cur-
rent control. The device can be controlled by
a serial interface (SPI™) or by analog / digi-
tal input signals. Short circuit, temperature,
undervoltage and overvoltage protection are
integrated.
SPI^TM is a trademark of Motorola,Inc.
TMC249 Block Diagram
g _{Drives 2-phase stepper motors}
g _{Integrated load measurment allows}
sensorless stall detection (Pat. Fi.)StallGuard™
g Up to 10A and 75V with external circuitry
g 7V to 28.5V motor supply voltage
g _{Low power dissipation via external low}
RDS-ON power stage
g _{4 bit DACs allow up to 16 times µ-stepping via}
SPI, higher resolution via analog control
g Control via SPI with easy to use 12 bit
protocol or external analog / digital signals
g _{Status Flags for short circuit,open load,}
over temperature, temperature pre-warning,
undervoltage
g _{Short circuit, over temperature, over voltage}
protection integrated
g _{Internal open load detector}
g _{Mixed decay feature for smooth motor}
operation
g _{3.3V or 5V operation for digital part}
g _{Current control allows cool motor and}
driver operation
g _{Standby and shutdown mode available}
g _{Slope control user programmable to reduce}
electromagnetic emissions
g Chopper frequency programmable via single
capacitor or external clock
g _{Only 4 external PMOS transistors required for}
unipolar operation
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