Datasheet

TMC2660 DATASHEET (Rev. 1.05 / 2016-JUL-14) 8
www.trinamic.com
3 Internal Architecture
Figure 3.1 shows the internal architecture of TMC266O.
+V
M
+V
M
VHS
5V linear
regulator
5VOUT
470nF
VS
GND
slope HS
slope LS
SRA
D
ENABLE
5V supply
TMC2660
OSC
15MHz
CSN
D
SCK
SDI
D
D
SDO
D
R
SENSE
SPI interface
Chopper
logic
R
SENSE
=75mΩ
for 4A peak (2.8A RMS)
R
SENSE
=100mΩ
for 3A peak (2.1A RMS)
Provide sufficient filtering capacity
near bridge supply (electrolyt
capacitors and ceramic capacitors)
S
D
G
S
D
G
motor coil A
S
D
G
S
D
G
P-Gate
drivers
Short to
GND
detectors
N-Gate
drivers
Break
before
make
VHS
+5V
9
DAC
VM-10V
linear
regulator
100n
16V
100n
Protection &
Diagnostics
+V
M
slope HS
slope LS
R
SENSE
Chopper
logic
R
SENSE
=75mΩ
for 4A peak (2.8A RMS)
R
SENSE
=100mΩ
for 3A peak (2.1A RMS)
S
D
G
S
D
G
motor coil B
S
D
G
S
D
G
P-Gate
drivers
Short to
GND
detectors
N-Gate
drivers
Break
before
make
VHS
+5V
9
DAC
ENABLE
ENABLE
Step &
Direction
interface
Step multiply
16 à 256
Sine wave
1024 entry
M
U
X
STEP
D
DIR
D
Temperature
sensor
100°C, 150°C
coolStep
Energy
efficiency
stallGuard 2
Clock
selector
CLK
D
SG_TST
Digital
control
D
SHORT
TO GND
BACK
EMF
CLK
8-20MHz
SIN &
COS
Phase polarity
Phase polarity
VCC_IO
D
D
TEST_SE
3.3V or 5V
+V
CC
100n
9-29V
step & dir
(optional)
SPI
stallGuard
output
TEST_ANA
22R
22R
Optional input protection and
filter network against inductive
sparks upon motor cable break
VSENSE
0.30V
0.16V
V
REF
OA1
OA2
VSA
BRA
SRB
BRB
OB2
OB1
VSB
10nF
10nF
Provide sufficient filtering capacity
near bridge supply (electrolyt
capacitors and ceramic capacitors)
Figure 3.1 TMC2660 block diagram
PROMINENT FEATURES INCLUDE:
Oscillator and clock selector
provide the system clock from the on-chip oscillator or an external
source.
Step and direction interface
uses a microstep counter and sine table to generate target currents
for the coils.
SPI interface
receives commands that directly set the coil current values.
Multiplexer
selects either the output of the sine table or the SPI interface for
controlling the current into the motor coils.
Multipliers
scale down the currents to both coils when the currents are
greater than those required by the load on the motor or as set by
the CS current scale parameter.
DACs and comparators
convert the digital current values to analog signals that are
compared with the voltages on the sense resistors. Comparator
outputs terminate chopper drive phases when target currents are
reached.
Break-before-make and gate drivers
ensure non-overlapping pulses, boost pulse voltage, and control
pulse slope to the gates of the power MOSFETs.
On-chip voltage regulators
provide high-side voltage for P-channel MOSFET gate drivers and
supply voltage for on-chip analog and digital circuits.