TMC2209¶

Product Profile¶

TMC2209 is an ultra-silent motor driver IC for two-phase stepper motors. Its continuous drive current is 2A and peak current is 2.8A. Compared with TMC2208, the driving current of this IC is not only improved by 0.6a-0.8a, but also this IC increases the function of locked-motor test.

The Flexible microPlyer interpolation unit can provide 256 microsteps. Stallguard4™locked-motor test can provide an abnormal signal when the motor rotates abnormally. CoolStep™ current dynamic control can save 75% energy. The sinusoidal control can be perfectly realized even in the system with limited pulse frequency. Since stealthChop2 ™ ultra-quiet technology is widely used in 3D printing, the design of these components is also compatible with existing 3D printer electronic devices, and it eliminates the expensive cost of redesigning.The module has a standard step/dir interface, it's easy to use.

Product Link: https://biqu.equipment/products/bigtreetech-tmc2209-stepper-motor-driver-for-3d-printer-board-vs-tmc2208

Features Highlights¶

The motor is difficult to lose steps.
Ultra-quiet mode；
The module has a large-area cooling pad，it can lower the temperature when drive is working.
The module can prevent the motor from shaking.
The module support locked-motor test.
The module support STEP/DIR and UART mode.

Specifications¶

Product size	*15.24mm20.32mm**
Power voltage（VM）	4.75V---28V DC
Peak current	2.8A
Current RMS	2A
Microstep setting	2、4、8、16（can be divided into 256 parts）
Max microstep	256
Operating mode	STEP/DIR or UART
SpreadCycle™	highly dynamic motor control chopper
StealthChop2™	ultra-quiet technology
MicroPlyer™	microstep control
StallGuard4™	locked-motor test
CoolStep™	current dynamic control

Dimensions¶

Pinout/Function¶

J1	MODE	J2	Mode
1	（EN）Enable	1	（VM）Power voltage
2	（MS1）Microstep setting	2	（GND）Ground
3	（MS2）Microstep setting	3	（A2）Phase A
4	（PDN）UART	4	（A1）Phase A
5	（PDN）UART	5	（B1）Phase B
6	（CLK）clock	6	（B2）Phase B
7	（STEP）Pulse input	7	（VCC_IO）Logic voltage
8	（DIR）Direction input	8	（GND）Ground

DIAG	Diagnostic and StallGuard output. High level upon stall detection or driver error. Reset error condition by ENN=high.
VREF	Analog reference voltage for current scaling or reference current for use of internal sense resistors (optional mode).
INDEX	Configurable index output. Provides index pulse.

Hardware Installation¶

Microstep Setting¶

Standalone Mode V_REF Setting:¶

Trinamic Driver Current Formula¶

\begin{flalign}
& I_{RMS} = {325mV \over R_{SENSE} + 20mΩ} * {1 \over \sqrt{2}} * {V_{REF} \over 2.5V} &
\end{flalign}

Our 2209 drivers utilise 110 mΩ R_SENSE resistors:

\begin{flalign}
& I_{RMS} = {325mV \over 110 + 20mΩ} * {1 \over \sqrt{2}} * {V_{REF} \over 2.5V} &
\end{flalign}

This simplifies to:

\begin{flalign}
& I_{RMS} = {V_{REF} \over \sqrt{2}} &
\end{flalign}

To Calculate Peak Current:

\begin{flalign}
& {I_{RMS} \over \sqrt{2}} = I_{PEAK} = V_{REF} &
\end{flalign}

Vref range：0.2V – 2.2V
Factory default Vref(same as Peak Current): 1.2V ±0.1V
Factory default RMS current：~0.9A

Potentiometer regulation instructions¶

Rotate the potentiometer clockwise to reduce the Vref voltage and the drive current can be reduced.
Rotate the potentiometer counterclockwise to increase the Vref voltage and the drive current can be increased.

Operating Mode¶

Pin setting of UART mode¶

The factory has connected the UART Pin to the fourth Pin, namely the PDN_UART Pin shown on the left side of the figure below. If the fifthPin is used as the UART Pin, the resistance shall be removed and welded to the following two pads, as shown on the right side of the figure below. PDN is welded to select pins corresponding to UART mode；

UART mode wiring diagram¶

Mute mode and anti-shake mode selection¶

The default mode used by the factory is mute mode, as shown in the picture on the left of the following figure.If anti-shake mode is needed,remove the resistance and weld it to the following two pads, as shown in the picture on the right of the picture below.

Software Configuration¶

For details, please click:

https://bigtreetech.github.io/docs/TMC2208.html#software-configuration

Precautions¶

Before installing the drive, make sure disconnect the power supply to prevent the drive from burning out.
Before installing the drive, user must confirm the drive direction, to prevent back connection caused by the drive burning.

Pay attention to the wiring sequence and I/O port when wiring. If the wrong line is connected, the driver will not work directly, please connect carefully as shown above.