TMC211-PA20 TRINAMIC [TRINAMIC Motion Control GmbH & Co. KG.], TMC211-PA20 Datasheet - Page 5

• Manufacturer Part Number: TMC211-PA20
• Description: Micro Stepping Stepper Motor Controller / Driver with LIN Interface
• Manufacturer: TRINAMIC [TRINAMIC Motion Control GmbH & Co. KG.]

TMC211 DATASHEET (V. 1.04 / January 7, 2005)
2 General Description
2.1 Block Diagramm
2.2 Position Controller / Main Control
Motor parameters, e.g. acceleration, velocity and position parameters are passed to the main control
block via the LIN interface. These information are stored internally in RAM or OTP memory and are
accessable by the position controller. This block takes over all time critical tasks to drive a stepper
motor to the desired position under abiding the desired motion parameters.
The main controller gets feedback from the stepper motor driver block and is able to arrange internal
actions in case of possible problems. Diagnostics information about problems and errors are
transferred to the LIN interface block.
2.3 Stepper Motor Driver
Two H-bridges are employed to drive both windings of a bipolar stepper motor. The internal transistors
can reach an output current of up to 800 mA. The PWM principle is used to force the given current
through the coils. The regulation loop performs a comparison between the sensed output current and
the internal reference. The PWM signals to drive the power transistors are derived from the output of
the current comparator.
Copyright © 2004-2005 TRINAMIC Motion Control GmbH & Co. KG
VBAT
HW1
HW0
HW2
TST
VDD
SWI
LIN
Synchronous
I/O controller
transceiver
controller
regulator
Voltage
slave
(test)
LIN
LIN
Oscillator
Position controller
Main control
&
OTP + ROM
Registers
VCP
Charge pump
Sinewave
Decoder
DACs
CP2 CP1
table
Thermal monitoring
Reference voltage
regulator
regulator
PWM
PWM
X
Y
&
5
OB1
OA1
OB2
OA2