Datasheet
TMC246 DATA SHEET (V2.02 / Jul. 31st, 2006) 22
Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG
(input ENN) V
ENNH
V
OSCH
High input voltage threshold
(input OSC)
tbd 2/3 VCC tbd V
V
OSCL
Low input voltage threshold
(input OSC)
tbd 1/3 VCC tbd V
V
VTD
VT threshold voltage
(referenced to VS)
-130 -155 -180 mV
V
TRIP
SRA / SRB voltage at
DAC=”1111”
internal ref. or
2V at INA / INB
315 350 385 mV
V
SRS
SRA / SRB overcurrent detection
threshold
570 615 660 mV
V
SROFFS
SRA / SRB comparator offset
voltage
-10 0 10 mV
R
INAB
INA / INB input resistance
Vin ≤ 3 V
175 264 300
kΩ
AC Characteristics
AC characteristics contain the spread of values guaranteed within the specified supply voltage and
temperature range unless otherwise specified. Typical characteristics represent the average value of
all parts.
Logic supply voltage: V
CC
= 5.0V, Bridge supply voltage: V
S
= 14.0V,
Ambient temperature: T
A
= 27°C
Symbol Parameter Conditions Min Typ Max Unit
f
OSC
Oscillator frequency
using internal oscillator
C
OSC
= 1nF
±1%
20 25
31 kHz
t
RS
, t
FS
Rise and fall time of outputs Oxx
with R
SLP
=0
V
o
15% to 85%
I
OXX
= 800mA
25 ns
t
RS
, t
FS
Rise and fall time of outputs Oxx
with R
SLP
= 25KΩ
V
o
15% to 85%
I
OXX
= 800mA
125 ns
t
RS
, t
FS
Rise and fall time of outputs Oxx
with R
SLP
= 50KΩ
V
o
15% to 85%
I
OXX
= 800mA
250 ns
T
BL
Effective Blank time BL1, BL2 = V
CC
1.35 1.5 1.65 µs
T
ONMIN
Minimum PWM on-time BL1, BL2 =
GND
0.7 µs
Thermal Protection
Symbol Parameter Conditions Min Typ Max Unit
T
JOT
Thermal shutdown 145 155 165 °C
T
JOTHYS
T
JOT
hysteresis 15 °C
T
JWT
Prewarning temperature 135 145 155 °C
T
JWTHYS
T
JWT
hysteresis 15 °C