TMC262 DATASHEET (Rev. 2.07 / 2013-FEB-14)
8
3 Internal Architecture
Figure 3.1 shows the internal architecture of the TMC262.
+VM
9-59V
220n
16V
100n
VHS
VS
TMC262
+VCC
5V supply
470nF
VM-10V
linear
regulator
VCC_IO
5V linear
regulator
5VOUT
OSC
15MHz
D
D
3.3V or 5V
8-20MHz
Provide sufficient filtering capacity
near bridge transistors (electrolyt
capacitors and ceramic capacitors)
100n
slope HS VHS
+VM
CLK
Clock
CLK
selector
HA1
HA2
P-Gate
drivers
ENABLE
S
S
G
G
STEP
DIR
P
P
Step &
Direction
interface
D
D
D
D
step & dir
(optional)
BMA1
BMA2
Short to
GND
detectors
Break
before
make
Phase polarity
Chopper
logic
Step multiply
16 à 256
motor coil A
D
S
D
S
Sine wave
1024 entry
LA2
LA1
SIN &
COS
N
N
G
G
N-Gate
drivers
TEST_SE
ENABLE
D
D
VREF
Digital
control
100mΩ for 2.8A peak
(resp. 1.5A peak)
RSENSE
slope LS +5V
9
SRA
DAC
10R
M
U
X
CSN
SCK
SDI
optional input protection
resistors against inductive sparks
upon motor cable break
D
D
D
D
DAC
SPI
SPI interface
SRB
10R
100mΩ for 2.8A peak
(resp. 1.5A peak)
9
RSENSE
slope LS +5V
SDO
CoolStep
Energy
efficiency
N-Gate
drivers
LB1
LB2
S
S
G
G
N
P
N
D
D
stallGuard
output
SG_TST
BACK
EMF
D
stallGuard 2
Break
before
make
Phase polarity
Chopper
logic
Short to
GND
detectors
motor coil B
BMB2
BMB1
Protection &
Diagnostics
SHORT
TO GND
D
S
D
S
P
G
G
P-Gate
drivers
HB2
HB1
ENABLE
Temperature
sensor
100°C, 150°C
+VM
slope HS VHS
DIE PAD
GND
TEST_ANA
Figure 3.1 TMC262 block diagram
Prominent features include:
Oscillator and clock selector
Step and direction interface
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.
SPI interface
Multiplexer
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.
Multipliers
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.
DACs and comparators
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.
Break-before-make and gate drivers
On-chip voltage regulators
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.
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TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
