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SECTION 4
ELECTRICAL SPECIFICATIONS
Table 1
Test Parameters: T
A
= 25
o
C,+V = 48v
TEST CONDITION
MIN TYP MAX UNITS
INPUT VOLTAGE ....................................................................................... 12 .......45 ........ 48
* ..........V
PHASE OUTPUT CURRENT ......................................
RMS .......................0.14 ...................1.5 ..........A
PHASE OUTPUT CURRENT .....................................
PEAK ..................................................2.3 ..........A
QUIESCENT CURRENT (+v, pin 12) ..........
INPUTS/OUTPUTS FLOATING .....................25 ...................... mA
QUIESCENT CURRENT (+5vdc, pin 14) ....
INPUTS/OUTPUTS FLOATING ................................... 40 ........ mA
ACTIVE POWER DISSIPATION ..........................
I
OUT
= 1A RMS ............................................2.0 ......... W
LOW LEVEL INPUT VOLTAGE .............................
ALL INPUTS ..................... .......................0.8 ..........V
HIGH LEVEL INPUT VOLTAGE ...................
ALL INPUTS EXCEPT RESET ......................2.0 ........................V
HIGH LEVEL INPUT VOLTAGE ................................
RESET ...................................2.3 ......................... V
INPUT PULL-UP RESISTANCE .................
FAULT IN, RES SEL 0-3, ENABLE .......4.4 ......4.7 ........5.0 ........kΩ
INPUT PULL-UP RESISTANCE .....................
STEP CLOCK, DIRECTION ...........2.1 ......2.2 ........2.3 ........kΩ
INPUT PULL-UP RESISTANCE ................................
RESET .......................0.9 ......1.0 ........1.1 ........ kΩ
LOW LEVEL OUTPUT CURRENT .....................
FAULT, FULLSTEP ................ 24 ..................................mA
HIGH LEVEL OUTPUT CURRENT ....................
FAULT, FULLSTEP .................-2 ..................................mA
LOW LEVEL OUTPUT VOLTAGE ..........................
I
OL
=24 mA ............................................... 0.4 ..........V
HIGH LEVEL OUTPUT VOLTAGE ..........................
I
OH
= -2 mA ....................4.5 ....................................V
* INCLUDES BACK EMF OF MOTOR
SECTION 5
THERMAL SPECIFICATIONS
Table 2
STORAGE TEMPERATURE ................................................ -40 TO +125
O
C
OPERATING TEMPERATURE ................................................0 TO +50
O
C
‡REAR MOUNTING SURFACE (MAX) ....................................... +70
O
C
‡ADDITIONAL COOLING MAY BE REQUIRED TO LIMIT REAR MOUNTING SURFACE
4
Care should be taken when choosing a heatsink to ensure that there is good thermal flow,
otherwise hot spots may occur in the IM481H which will reduce the effectivness of the
thermal protection.
An optional thermal pad ( Part # TI-481 ) and heat sink ( Part # H-481 ) is available
for the IM481H
WARNING ! Rear mounting surface of driver contains
different voltages and must be keep isolated when attached
to a conductive surface !
NOTE: