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 46
M i c r o s t ep D r i v e r f o r
up to 1.5A
with stallGuard™
M A IN CH A R AC T ER IS T IC S
INFO
The TMC246 is a smart power microstepping driver for bipolar
stepper motors. The integrated unique sensorless stall detec-
tion 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 TMC246 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. The integrated low-RDS-ON
TrenchFET® power MOSFETs give an extremely high efficiency
and allow driving of a high motor current of up to 1.5A per
phase without cooling measures even at high environment
temperatures.
The small footprint and high efficiency make the device a per-
fect solution for embedded motion control and even for battery
PACKAGE
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 1500 mA coil current (peak)
• 7V to 34V motor supply (TMC246A)
• 3.3V or 5V operation for digital part
• standard PQFP-44 package
• RoHS compliant
powered designs.
C/CLK
TMC246
OSC
IN A
IN B
2x
4 bit
DACs
PWM control
&
Gate Driver
Coil A
internal
Driver
Stage
SPI
Control
&
Diagnostics
&
Stallguard
10 mm
Current
monitoring
Step
Motor
ERROR
PWM control
&
Gate Driver
Coil B
3.3 / 5V DC
7..34V DC
internal
Driver
Stage
Temp / Volt
protection
ORDER CODE
DESCR IPT ION
TMC246A-PA
TMC428A-EVAL
1.5A driver with stallGuard™, PQFP-44
Evaluation board for TMC428, TMC246A and TMC249A with stallGuard™
www.trinamic.com
– for detailed information and datasheets
12
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
