POW E R D R I V E R F O R S T E PP E R M OT O RS
I N T E GR A T E D C I R C U ITS
TMC
2 49
M i c r o s t ep D r i v e r
for External MOSFETs
f o r up t o 4 A
with stallGuard™
M A IN CH A R AC T ER IS T IC S
INFO
The TMC249 is a smart high current microstepping driver for
bipolar stepper motors. The integrated unique sensorless stall
detection stallGuard™ makes it a good choice for applications
where a reference point is needed, but where a switch cannot
be used. The ability to predict an overload makes the TMC249
an optimum choice for drives where a high reliability is desired.
It provides an SPI™ interface as well as the classical analog/
digital control. A full set of protection and diagnostic features
makes this device very rugged. It directly drives external MOSFETs
for currents of up to 4A. (A list of compatible power MOSFETs
is given within the datasheet.) This way it reaches an extremely
high efficiency and allows driving of a high motor current with-
out cooling measures even at high environment temperatures.
With the new chip-scale QFN package a 4A motor driver can be
realized on the size of a stamp!
The high motor current makes this device ideal for miniaturized
highly dynamic and high torque drive systems.
ELECTRICAL
DATA
INTERFACE
• sensorless stall detection StallGuard™
• full protection and diagnostics
• low power dissipation
• 16 times microstepping via SPI,
64 times using additional shift register,
even more via analog control
• mixed decay for smooth operation
• programmable slope control for low EME
• internal or external chopper clock
• standby and shutdown mode
• easy-to-use SPI™ interface
• classical analog interface
• up to 4000 mA coil current (peak) with
just 4 external dual MOSFETS
• 7V to 34V motor supply (TMC249A),
up to 60V using a few add. components
• higher current / voltage
using additional gate drivers
• 3.3V or 5V operation for digital part
PACKAGE
• standard SO28 package
• chip size QFN32 7x7 mm² package
• RoHS compliant
C/CLK
TMC249
OSC
IN A
IN B
2x
4 bit
DACs
PWM control
&
Gate Driver
Coil A
SPI
Control
&
Diagnostics
&
Stallguard
Current
monitoring
PWM control
&
Gate Driver
Coil B
Step
Motor
10 mm
ERROR
3.3 / 5V DC
7..34V DC
Temp / Volt
protection
ORDER CODE
DESCR IPT ION
TMC249A-SA
TMC249A-LA
Related product:
TMC428A-EVAL
4A driver with stallGuard™ for external MOSFETs, SO28
4A driver with stallGuard™ for external MOSFETs, QFN32
TMC32NP, TMC32NP2, TMC34NP
Evaluation board for TMC428, TMC246A and TMC249A with stallGuard™
www.trinamic.com
– for detailed information and datasheets
14
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
