Datasheet

TMC5130A DATASHEET (Rev. 1.11 / 2015-OCT-08) 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
TMC5130A
SPI interface
CSN
SCK
SDO/NAO
SDI/NAI
reference switch
processing
REFL/STEP REFR/DIR
DIAG / INT out
and
Single wire
interface
5V Voltage
regulator
charge pump
22n
63V
100n
16V
SWN/DIAG0
SW_SEL
CLK_IN
SWP/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
Controller
Full Bridge A
Full Bridge B
+V
M
VS
stepper
motor
N
S
OA1
OA2
OB1
OB2
Driver
100n
BRB
100µF
CPI CPO
+V
IO
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
Encoder
unit
A B N
ENCB
ENCA
ENCN
Optional incremental
encoder inputs
SD_MODE
SPI_MODE
leave open opt. driver enable
Figure 3.1 Standard application circuit
The standard application circuit uses a minimum set of additional components in order to operate the
motor. Use low ESR capacitors for filtering the power supply which are capable to cope with the
current ripple. The current ripple often depends on the power supply and cable length. The VCC_IO
voltage 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 supply voltage, like 24V or
36V. Using the 12V supply for VSA will reduce the power dissipation of the internal 5V regulator to
about 37% resp. 23% 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.