A3082B データシートの表示（PDF） - Fairchild Semiconductor
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A3082B Datasheet PDF : 12 Pages
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Application Information
1. Thermal Shut Down Circuit
I
Q1
V1
R1
V2
R2
Q2
Q3
KA3082
When Ta = 25°C, Q2 & Q3 are Turn-off and output stage operate normally.
V1 = I × (R1 + R2)
V2 = R2 / (R1 + R2) × V1 = 0.37V
When Ta = 165°C, Q2 & Q3 become Turn-on and it turn-off the output stage.
0.70V - 0.37V = 330mV (When Q2 & Q3 are Turn-on, VbeQ2 = VbeQ3 = 0.70V)
And temperature coefficient of Q2 = Q3 = −2mV/°C
∴ T.S.D: 330mV / 2mV = 165°C
2. Logic Input & Output Table
Input
Pin #5
Low
High
Low
High
Input High is above 2.0V.
Input Low is below 0.7V.
Pin #6
Low
Low
High
High
Pin #2
Low
High
Low
Low
Output
Pin #10
Low
Low
High
Low
Motor
Brake
Forward
Reverse
Brake
7
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