Datasheet
TMC5062 DATASHEET (Rev. 1.11 / 2017-MAY-16) 12
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3 Sample Circuits
The sample circuits show the connection of the 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
TMC5062
SPI interface
CSN/IO0
SCK/IO1
SDO/IO3
SDI/IO2
reference switch
processing
REFL1
REFR1
reference switch
processing
Controller 2
Single wire
interface
5V Voltage
regulator
charge pump
22n
SWION
SW_SEL
REFL2
REFR2
SWIOP
ENC1A/INT
ENC1B/PP
INT & position
pulse output
DRV_ENN
DRV_ENN
GNDP
GND
GNDA
TST_MODE
DIE PAD
Controller 1
Full Bridge A
Full Bridge B
+V
M
VS
stepper
motor #1
N
S
O1A1
O1A2
BR1A
R
S1B
O1B1
O1B2
Driver 1
100n
BR1B
R
S1A
Full Bridge A
Full Bridge B
stepper
motor #2
N
S
O2A1
O2A2
BR2A
R
S2B
O2B1
O2B2
Driver 2
BR2B
R
S2A
VS
100n
+V
M
100µF
CPI
CPO
+V
IO
*
)
For a reliable start-up it is essential that VCC_IO comes up to a minimum of 1.5V before the TMC5062 leaves the reset condition. Therefore,
TRINAMIC recommends using a fast-start-up voltage regulator (e.g. TS3480CX33) in a 3.3V environment.
VCC_IO
VCP
100n
CLK_IN
+V
M
5VOUT
VSA
4.7µ
VCC
optional
external
clock
12-16MHz
100n
100n
TS3480
CX33*
)
3.3V
5V
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 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 a fast startup 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 best motor chopper
performance, an optional R/C-filter de-couples 5VOUT from digital noise cause by power drawn from
VCC.
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.