TRINAMIC TMC249A-SA

POWER DR I V E R F O R S T E P P E R M O T O R S
I N T E G R A T E D C I R C U ITS
TMC 2 49
Micr oste p Dr iver
f or E xter nal MOSF ETs
fo r up to 4A
wi th s tall Guar d™
M A IN CH A R AC T ER IS T IC S
INFO
The TMC249 is a smart high current microstepping driver for
• sensorless stall detection StallGuard™
bipolar stepper motors. The integrated unique sensorless stall
• full protection and diagnostics
detection stallGuard™ makes it a good choice for applications
• low power dissipation
where a reference point is needed, but where a switch cannot
• 16 times microstepping via SPI,
64 times using additional shift register,
even more via analog control
be used. The ability to predict an overload makes the TMC249
an optimum choice for drives where a high reliability is desired.
• mixed decay for smooth operation
It provides an SPI™ interface as well as the classical analog/
• programmable slope control for low EME
digital control. A full set of protection and diagnostic features
• internal or external chopper clock
makes this device very rugged. It directly drives external MOSFETs
• standby and shutdown mode
for currents of up to 4A. (A list of compatible power MOSFETs
is given within the datasheet.) This way it reaches an extremely
INTERFACE
• classical analog interface
high efficiency and allows driving of a high motor current without cooling measures even at high environment temperatures.
• easy-to-use SPI™ interface
ELECTRICAL
DATA
With the new chip-scale QFN package a 4A motor driver can be
• 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
realized on the size of a stamp!
• higher current / voltage
using additional gate drivers
The high motor current makes this device ideal for miniaturized
highly dynamic and high torque drive systems.
• 3.3V or 5V operation for digital part
PACKAGE
• standard SO28 package
• chip size QFN32 7x7 mm² package
• RoHS compliant
C/CLK
IN A
IN B
TMC249
OSC
2x
4 bit
DACs
SPI
PWM control
&
Gate Driver
Coil A
Control
&
Diagnostics
&
Stallguard
ERROR
3.3 / 5V DC
7..34V DC
Current
monitoring
PWM control
&
Gate Driver
Temp / Volt
protection
Step
Motor
10 mm
Coil B
OR DE R C O DE
D E S C RI P T I ON
TMC249A-SA
4A driver with stallGuard™ for external MOSFETs, SO28
TMC249A-LA
4A driver with stallGuard™ for external MOSFETs, QFN32
Related product:
TMC32NP, TMC32NP2, TMC34NP
TMC428A-EVAL
Evaluation board for TMC428, TMC246A and TMC249A with stallGuard™
www.trinamic.com – for detailed information and datasheets
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