Datasheet

TMC2130 DATASHEET (Rev. 1.09 / 2017-MAY-15) 13
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3 Sample Circuits
The sample circuits show the connection of external components in different operation and supply
modes. The connection of the bus interface and further digital signals is left out for clarity.
3.1 Standard Application Circuit
VCC_IO
TMC2130
SPI interface
CSN
SCK
SDO
SDI
Step & Dir input
with microPlyer
STEP DIR
DIAG / INT out
5V Voltage
regulator
charge pump
22n
63V
100n
16V
DIAG0
CLK_IN
DIAG1
+V
M
5VOUT
VSA
4.7µ
+V
IO
DRV_ENN
GNDP
GNDA
TST_MODE
DIE PAD
VCC
opt. ext. clock
12-16MHz
3.3V or 5V
I/O voltage
100n
100n
Sequencer
Full Bridge A
Full Bridge B
+V
M
VS
stepper
motor
N
S
OA1
OA2
OB1
OB2
Driver
100n
BRB
100µF
CPI CPO
BRA
R
SA
Use low inductivity SMD
type, e.g. 1206, 0.5W
R
SB
100n
VCP
Optional use lower
voltage down to 6V
2R2
470n
DAC Reference
AIN_IREF
IREF
Use low inductivity SMD
type, e.g. 1206, 0.5W
dcStep Controller
Interface
DC_IN
DC_EN
DCO
opt. driver enable
SPI_MODE
leave open
B.Dwersteg, ©
TRINAMIC 2014
opt. dcStep control
Figure 3.1 Standard application circuit
The standard application circuit uses a minimum set of additional components. Two sense resistors
set the motor coil current. See chapter 9 to choose the right sense resistors. Use low ESR capacitors
for filtering the power supply. The capacitors need to cope with the current ripple cause by chopper
operation. A minimum capacity of 100µF near the driver is recommended for best performance.
Current ripple in the supply capacitors also depends on the power supply internal resistance and
cable length. VCC_IO can be supplied from 5VOUT, or from an external source, e.g. a low drop 3.3V
regulator. In order to minimize linear voltage regulator power dissipation of the internal 5V voltage
regulator in applications where VM is high, a different (lower) supply voltage can be used for VSA, if
available. For example, many applications provide a 12V supply in addition to a higher driver supply
voltage. Using the 12V supply for VSA rather than 24V will reduce the power dissipation of the
internal 5V regulator to about 37% of the dissipation caused by supply with the full motor voltage.
Basic layout hints
Place sense resistors and all filter capacitors as close as possible to the related IC pins. Use a solid
common GND for all GND connections, also for sense resistor GND. Connect 5VOUT filtering capacitor
directly to 5VOUT and GNDA pin. See layout hints for more details. Low ESR electrolytic capacitors are
recommended for VS filtering.
Attention
In case VSA is supplied by a different voltage source, make sure that VSA does not exceed VS by
more than one diode drop upon power up or power down.