TMC222-SI TRINAMIC, TMC222-SI Datasheet - Page 24
![IC, MOTOR CTRL/DRVR, STEPPER, SOIC-20](/photos/19/2/190270/4467760_sml.jpg)
TMC222-SI
Manufacturer Part Number
TMC222-SI
Description
IC, MOTOR CTRL/DRVR, STEPPER, SOIC-20
Manufacturer
TRINAMIC
Datasheet
1.TMC222-SI.pdf
(47 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TMC222-SI
Manufacturer:
TRINAMI
Quantity:
20 000
24
TMC222 DATASHEET (V. 1.06 / March 15, 2007)
5.3.3
Chopper Mechanism
The chopper frequency is fixed as specified in chapter 10.4 AC Parameters on page 46. The TMC222
uses an intelligent chopper algorithm to provide a smooth operation with low resonance. The TMC222
uses internal measurements to derive current flowing through coils. If the current is less than the
desired current, the TMC222 switches a H-bridge in a way that the current will increase. Otherwise if
the current is too high, the H-bridge will be switched to decrease the current. For decreasing two
modes are available, slow decay and fast decay, whereas fast decay decreases the current faster
than slow decay. The figure below shows the chopper behavior.
Figure 13: Different Chopper Cycles with Fast and Slow Decay
Copyright © 2004-2007 TRINAMIC Motion Control GmbH & Co. KG