TMC262 DATASHEET (Rev. 2.07 / 2013-FEB-14)
8
3
Internal Architecture
+V
M
9-59V
220n
16V
Figure 3.1 shows the internal architecture of the TMC262.
100n
VHS
+V
CC
3.3V or 5V
VCC_IO
100n
D
VS
TMC262
OSC
15MHz
VM-10V
linear
regulator
5V linear
regulator
slope HS VHS
5VOUT
5V supply
Provide sufficient filtering capacity
near bridge transistors (electrolyt
capacitors and ceramic capacitors)
470nF
8-20MHz
CLK
D
Clock
selector
Step &
Direction
interface
Step multiply
16 à 256
Sine wave
1024 entry
+V
M
HA1
HA2
BMA1
BMA2
S
G
D
S
CLK
ENABLE
step & dir
(optional)
STEP
DIR
P-Gate
drivers
Break
before
make
Short to
GND
detectors
D
D
P
G
D
P
Phase polarity
Chopper
logic
motor coil A
D
G
S
D
0.16V
0.30V
VSENSE
SIN &
COS
N-Gate
drivers
V
REF
LA2
LA1
N
G
S
N
TEST_SE
ENABLE
CSN
SCK
SPI
SDI
SDO
D
D
Digital
control
M
U
X
SPI interface
9
slope LS +5V
DAC
SRA
10R
optional input protection
resistors against inductive sparks
upon motor cable break
R
SENSE
100mΩ for 2.8A peak
(resp. 1.5A peak)
D
D
D
D
9
DAC
slope LS +5V
SRB
10R
R
SENSE
100mΩ for 2.8A peak
(resp. 1.5A peak)
CoolStep
Energy
efficiency
stallGuard
output
SG_TST
D
N-Gate
drivers
BACK
EMF
SHORT
TO GND
ENABLE
LB1
G
S
S
LB2
N
D
G
D
N
stallGuard 2
Protection &
Diagnostics
Phase polarity
Chopper
logic
Break
before
make
Short to
GND
detectors
P-Gate
drivers
BMB2
BMB1
D
D
motor coil B
HB2
HB1
G
S
P
G
S
P
Temperature
sensor
100°C, 150°C
slope HS VHS
+V
M
DIE PAD
GND
TEST_ANA
Figure 3.1 TMC262 block diagram
Prominent features include:
Oscillator and clock selector
Step and direction interface
SPI interface
Multiplexer
Multipliers
provides the system clock from the on-chip oscillator or an external
source.
uses a microstep counter and sine table to generate target currents
for the coils.
receives commands that directly set the coil current values.
selects either the output of the sine table or the SPI interface for
controlling the current into the motor coils.
scales 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.
converts 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.
ensure non-overlapping pulses, boost pulse voltage, and control
pulse slope to the gates of the power MOSFETs.
provide high-side voltage for P-channel MOSFET gate drivers and
supply voltage for on-chip analog and digital circuits.
DACs and comparators
Break-before-make and gate drivers
On-chip voltage regulators
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TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
