TMC222-SI TRINAMIC, TMC222-SI Datasheet - Page 5

• Manufacturer Part Number: TMC222-SI
• Description: IC, MOTOR CTRL/DRVR, STEPPER, SOIC-20
• Manufacturer: TRINAMIC

Specifications of TMC222-SI

• Motor Type: Stepper
• No. Of Outputs: 4
• Output Current: 800mA
• Supply Voltage Range: 8V To 29V
• Driver Case Style: SOIC
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Device Type: Motor
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TMC222 DATASHEET (V. 1.06 / March 15, 2007)
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 serial interface. These information are stored internally in RAM or OTP memory and are
accessible 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 serial 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.
2.4 Two Wire Serial Interface
Communication between a host and the TMC222 takes places via the two wire bi-directional serial
interface. Motion instructions and diagnostics information are provided to or from the Main Control
block. It is possible to connect up to 32 devices on the same bus. Slave addresses are programmable
via OTP memory or an external pin.
Copyright © 2004-2007 TRINAMIC Motion Control GmbH & Co. KG
VBAT
SWI
SDA
SCL
TST
VDD
HW
Two Wire
Controller
Regulator
Interface
Interface
Voltage
Serial
Serial
Test
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
OA1
OA2
OB1
OB2