SC431B 查看數據表（PDF） - ON Semiconductor
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SC431B Datasheet PDF : 20 Pages
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NCP431A, SC431A, NCP431B, SC431B, NCP432B, SC432B Series
Input
Vref
V KA
Input
IK
R1
Iref
R2
Vref
VKA
Input
IK
ǒ ǓR1
VKA + Vref
1)
R2
) Iref @ R1
V KA
Ioff
Figure 3. Test Circuit for VKA = Vref
Figure 4. Test Circuit for VKA > Vref Figure 5. Test Circuit for Ioff
150.0
100.0
Input
VKA = Vref
TA = 25°C
VKA
IK
50.0
0.0
−50.0
60.0
40.0
20.0
Input
VKA = Vref
TA = 25°C
VKA
IK
0.0
−20.0
−40.0
IMin
−100.0
−60.0
−1.0
0.0
1.0
2.0
3.0
−1.0
0.0
1.0
2.0
3.0
VKA, CATHODE VOLTAGE (V)
VKA, CATHODE VOLTAGE (V)
Figure 6. Cathode Current versus Cathode
Voltage
Figure 7. Cathode Current versus Cathode
Voltage
80.00
70.00
60.00
50.00
40.00
30.00
20.00
10.00
0.00
−50 −25
0
25 50
75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 8. Minimum Cathode Current Regulation
versus Ambient Temperature
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