stk672-080-e Sanyo Semiconductor Corporation, stk672-080-e Datasheet - Page 17

• Manufacturer Part Number: stk672-080-e
• Description: Unipolar Constant-current Chopper External Excitation Pwm Circuit With Built-in Microstepping Controller Stepping Motor Driver Sine Wave Drive Output Current 2.8a 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
60
50
40
30
20
10
0
0
100
0
V CC 1 : 24V
Test motor : PK264-02B
Motor current :
I OH :
2-phase excitation: 1.5A
2W1-2 phase excitation: 2A
With no heat sink
Test motor: PK264-02B
V CC 1=24V
2
Substrate Temperature Rise Test
3
0.5
5 7 1k
CLK frequency, PPS - Hz
Motor current, I OH - V
2ex
Vref - I OH
2W1-2ex
1.0
2
3
5 7 10k
1.5
2
2.0
3
ITF02422
ITF02424
STK672-080-E
5 7 100k
2.5
3.5
3.0
2.5
2.0
1.5
1.0
0.5
80
70
60
50
40
30
20
10
0
0
Motor Current I OH Derating Curves vs. Operating Substrate Temperature Tc.
0
0
Hybrid IC internal average power dissipation, Pd - W
0.5
20
Operating substrate temprature, Tc - °C
1.0
40
ΔTc - Pd
1.5
60
Motor voltage: 24V
Motor resistance (R): 0.4Ω
Inductance (L): 1.2mH
2.0
80
2.5
No.6507-17/18
100
3.0
ITF02423
ITF02425
120
3.5