TMC248 Datasheet, PDF (1/40 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Low-cost stepper driver

POWER DRIVER FOR STEPPER MOTORS
INTEGRATED CIRCUITS
TMC248 DATASHEET
Low-cost stepper driver for two-phase bipolar motors with low noise PWM chopper and stallGuard™.
External MOSFETs fit different motor sizes. With SPI, classic analog interface, protection & diagnostics.
FEATURES AND BENEFITS
High Current up to 7 A motor current using 4 external dual-
MOS transistors.
Voltage Range 7 V… 36 V DC
3.3 V or 5 V DC for digital part
SPI & External Analogue / Digital Signals
Microstep Resolution up to 64 microsteps per full step
Low Power Dissipation via low RDS-ON power stage
Protection: overvoltage, overtemperature & short circuit
Diagnostics: overcurrent, open load, overtemperature,
temperature prewarning, and undervoltage
stallGuard™ sensorless stall detection and load measurement
Mixed Decay for smooth motor operation
Slope Control for reduced electromagnetic emissions
Current Control for cool motor and driver
Standby and Shutdown Mode
Smallest Size 5x5mm QFN28 package
BLOCK DIAGRAM
IN A
C/CLK
SPI
OSC
SPI Control,
Configuration,
Diagnostics
stallGuard™
TMC248
DAC
4 bit
Driver
Coil A
PWM
Control
Current
Monitoring
DAC
ERROR
Protection:
Temperature
4 bit
Power
Voltage
Supply
Short Circuit
Driver
Coil B
IN B
TRINAMIC Motion Control GmbH & Co. KG
Hamburg, Germany
APPLICATIONS
Textile, Sewing Machines
Office Automation
Printer and Scanner
Heliostat Controller
ATM, Cash recycler
POS
CCTV, Security
Antenna Positioning
Pumps and Valves
Lab Automation
Liquid Handling
Medical
DESCRIPTION
The TMC248 driver for two-phase stepper
motors offers a competitive feature set,
including 64x micro-stepping, sensorless
mechanical load measurement with stall
detection, and smart current control.
Standard SPI™ and communication via
external analog / digital signals are
available. The TMC248 drives eight external
Low-RDS-ON high efficiency MOSFETs for
motor currents up to 7A and up to 36V.
Integrated protection and diagnostic
features support robust and reliable
operation. High integration and small form
factor enable miniaturized designs with
low external component count for cost-
effective and highly competitive solutions.
MOSFET
Driver Stage
M
8 x Mosfet