stk672-070-e Sanyo Semiconductor Corporation, stk672-070-e Datasheet - Page 17

• Manufacturer Part Number: stk672-070-e
• Description: Unipolar Constant-current Chopper External Excitation Pwm Circuit With Built-in Microstepping Controller Stepping Motor Driver Sine Wave Drive Output Current 1.5a No Heat Sink*
• Manufacturer: Sanyo Semiconductor Corporation

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 I OH , and whether I OH is continuous or intermittent, it must be
measured in an actual operating system.
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
40
35
30
25
20
15
10
0
5
0
100
10
2
Substrate Temperature Rise Test
15
3
5 7
20
CLK frequency, PPS - Hz
Motor current, I OH - V
1000
25
Vref - I OH
2
30
3
Test motor: PK244-01B
V CC 1=24V
Test motor: PK264-01B
V CC 1=24V, V CC 2=5V
I OH =1A (with no heat sink)
5 7
35
10000
40
2
3
45
ITF02191
ITF02193
5 7
STK672-070-E
100000
50
2.5
2.0
1.5
1.0
0.5
90
80
70
60
50
40
30
20
10
0
0
0
0
Motor Current I OH Derating vs. Operating Substrate Temperature Tc.
Hybrid IC internal average power dissipation, Pd - W
0.5
20
Substrate temprature, Tc - °C
1.0
40
ΔTc - Pd
1.5
60
2.0
80
2.5
No.7307-17/18
100
3.0
ITF02192
ITF02194
120
3.5