TMC2100

Product Introduction

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The TMC2100 provides an integrated motor driver solution for 3D-Printing, Cameras, Scanners and other automated equipment applications. The device has an integrated microstepping indexer, the completely noiseless current control mode StealthChop™ and is intended to drive a bipolar stepper motor. The output driver block consists of low RDSon N-Channel power MOSFETs configured as full H-bridges to drive the motor windings. The TMC2100 is capable of driving up to 2.5A of current from each output (with proper heatsinking). TMC2100 is designed for a supply voltage of 5~46V. The device has a step and direction interface and can be configured with digital pins.

Features

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• Hardware compatible with StepStick and Pololu A4988 Stepper Driver
• Components on bottom PCB side for better heat emission
• Automatic standby current reduction
• stealthChop - for quiet operation and smooth motion
• spreadCycle - highly dynamic motor control chopper
• Drive capability up to 1.2A (RMS) continuous coil current
• Step/Dir interface with microstep interpolation (up to 256 microsteps)
• Configuration via CFG pins

Specifications

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Model	TMC2100
Interface	Step/Dir
Configuration	CFG Pins
Native Microsteps	up to 1 ⁄ 16
microPlyer Microsteps	1 ⁄ 256
Logic Supply Voltage (VIO)	3 - 5V
Motor Supply Voltage (VM)	5.5 - 46V
Motor Phase Current max	1.2A RMS, 2.5A Peak
Internal V- Regulator	enabled
RDSon	>=0.5 Ohm
stealthChop (quiet)	yes
spreadCycle	yes
coolStep	no
stallGuard	no
dcStep	no

Pin Functions

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Pin	Function
	Power Supply
GND	Ground
VM	Motor Supply Voltage
VIO	Logic Supply Voltage
	Motor Outputs
M1A	Motor Coil 1
M1B	Motor Coil 1
M2A	Motor Coil 2
M2B	Motor Coil 2
	Control Inputs
STEP	Step-Signal Input
DIR	Direction-Signal Input
	TMC2100
EN	Enable Motor Outputs: GND=on, VIO=off, OPEN=Auto-Power-Down
CFG0	Chopper Off Time TOFF: GND=140tclk, VIO=236tclk, OPEN=332tclk
CFG1	Step-Configuration
CFG2	Step-Configuration
CFG3	Current Setting: GND=int, VIO=int, OPEN=ext
CFG4	Chopper Hysteresis HEND: GND=5, VIO=9, OPEN=13
CFG5	Chopper Blank Time TBL: GND=16, VIO=24, OPEN=36
DIAG0	Diagnostics Output 0
DIAG1	Diagnostics Output 1
VREF	Analog Reference Voltage

Interface Resources

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Wiring Diagram

Motor Current Setting

The best way to set the motor current is by measuring the voltage on the Vref pin (0…2.5V) and adjusting the voltage with the potentiometer. The maximum settable motor current is 1.77A RMS (0.11Ohm sense resistors), but the SilentStepSticks can only be used up to 1.2A RMS.

Irms = (Vref _ 1.77A) / 2.5V = Vref _ 0.71

Vref = (Irms _ 2.5V) / 1.77A = Irms _ 1.41 = Imax

Vref -> Voltage on Vref pin

Irms -> RMS (Root Mean Square) current per phase (Irms = Imax / 1.41)

Imax -> Maximum current per phase (Imax = Irms * 1.41)

Calculator

RMS Current (A): Reference Voltage (V):

Micro-stepping

CFG2	CFG1	Steps	Interpolation	Mode
GND	GND	1	-	spreadCycle
GND	VIO	1⁄2	-	spreadCycle
GND	OPEN	1⁄2	1⁄256	spreadCycle
VIO	GND	1⁄4	-	spreadCycle
VIO	VIO	1⁄16	-	spreadCycle
VIO	OPEN	1⁄4	1⁄256	spreadCycle
OPEN	GND	1⁄16	1⁄256	spreadCycle
OPEN	VIO	1⁄4	1⁄256	stealthChop
OPEN	OPEN	1⁄16	1⁄256	stealthChop

Instructions for Use

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1. When using on Ramps1.4 or MKS Gen, please remove the three jumper caps under the socket.
2. Pay attention to the direction.
3. The heat sink is directly attached to the PCB.
4. The motor direction is the opposite of 4988 and 8825. If you want to replace the 4988 directly, please adjust the firmware or adjust the motor connection.

Shop

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• TMC2100

Tech Support

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Please submit any technical issue into our forum