TMC249 / TMC249A DATA SHEET (V2.09 / 2009-Jul-30)
7
Application Circuit / Block Diagram
+VM
220nF
100µF
RSH
BL1
BL2
VS
TMC249
VT
OSC
OSC
HA1
HA2
1nF
VCC
P
N
P
N
Under-
voltage
100nF
Coil A
LA2
Tem-
perature
LA1
SRA
RS
0
1
[MDBN] SCK
4
4
DAC
[PHA]
SDI
INA
INB
REFSEL
VREF
[ERR] SDO
[PHB] CSN
DAC
1
0
SRB
LB1
RS
LB2
N
P
N
ENN
Coil B
VCC/2
HB2
HB1
P
REFSEL
SPE
ANN
AGND
GND
SLP
RSLP
[MDAN]
stand alone mode
[...]: function in stand alone mode
Pin Functions
Pin
Function
Motor supply voltage
Pin
VT
Function
VS
Short to GND detection comparator –
connect to VS if not used
VCC
3.0-5.5V supply voltage for analog GND
and logic circuits
Digital / Power ground
AGND
Analog ground (Reference for SRA, OSC
SRB, OSC, SLP, INA, INB, SLP)
Oscillator capacitor or external clock
input for chopper
INA
Analog current control phase A
Clock input of serial interface
Data input of serial interface
INB
Analog current control input phase B
Data output of serial interface (tri-state)
Chip select input of serial interface
SCK
SDI
SDO
CSN
ENN
Device enable (low active), and SPE
overvoltage shutdown input
Enable SPI mode (high active). Tie to
GND for non-SPI applications
ANN
Enable analog current control via SLP
INA and INB (low active)
Slope control resistor. Tie to GND for
fastest slope
BL1, BL2
Digital blank time select
SRA, SRB Bridge A/B current sense resistor input
HA1, HA2, Outputs for high side P-channel LA1, LA2, Outputs for low side N-channel
HB1, HB2 transistors LB1, LB2 transistors
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TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
