SECTION 4
ELECTRICAL SPECIFICATIONS
Table 1
Test Parameters: TA = 25oC,+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 ..........................IOUT = 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 ..........................IOL =24 mA ...............................................0.4 .......... V
HIGH LEVEL OUTPUT VOLTAGE ..........................IOH = -2 mA ....................4.5 ....................................V
* INCLUDES BACK EMF OF MOTOR
SECTION 5
THERMAL SPECIFICATIONS
Table 2
STORAGE TEMPERATURE ........................... ..................... -40 TO +125 OC
OPERATING TEMPERATURE ................................................0 TO +50 OC
‡REAR MOUNTING SURFACE (MAX) .......................................+70 OC
‡ADDITIONAL COOLING MAY BE REQUIRED TO LIMIT REAR MOUNTING SURFACE
4
Care should be taken when choosing a heatsink to ensure that the re 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