SKT672-070-E Datasheet, PDF (17/18 Pages) ON Semiconductor – Stepping Motor Driver

STK672-070-E
Vref - IOH
2.0
Test motor: PK244-01B
1.8
VCC1=24V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
10
15
20
25
30
35
40
45
50
Motor current, IOH - V
ITF02191
Substrate Temperature Rise Test
40
Test motor: PK264-01B
35
VCC1=24V, VCC2=5V
IOH=1A (with no heat sink)
30
ΔTc - Pd
90
80
70
60
50
40
30
20
10
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Hybrid IC internal average power dissipation, Pd - W ITF02192
Motor Current IOH Derating vs. Operating Substrate Temperature Tc.
2.5
2.0
25
1.5
20
15
1.0
10
5
0
100 ^{2 3 5 7} 1000 ^{2 3 5 710000 2 3 5 7100000}
CLK frequency, PPS - Hz
ITF02193
0.5
0
0
20
40
60
80
100
120
Substrate temprature, Tc - °C
ITF02194
Notes
• The current ranges shown above apply when the output voltage is not in the avalanche range.
• The operating substrate temperature Tc values shown above are measured during motor operation. Since Tc varies
with the ambient temperature Ta, the value of IOH, and whether IOH is continuous or intermittent, it must be
measured in an actual operating system.
No.7307-17/18