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FAN8082 View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
View to exact match
FAN8082
Fairchild
Fairchild Semiconductor Fairchild
FAN8082 Datasheet PDF : 12 Pages
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3. Logic Switch Circuit
BI-DIRECTIONAL DC MOTOR DRIVER
SVCC
V1
V2
5
4
Q4
Q7
Q6
Q5
VCTL
3
7.4V ZD
*ZD : External Component
This circuit define reference voltage of output.
When pin #4 is “H” and pin #5 is “L”,
- V1 = Vzd + VbeQ4 + VbeQ5 ·=· 8.9V
- V2 = Vbeq 7 + VsatQ6 ·=· 0.87V
V1 and V2 are related with the output voltage of the motor and change according to the voltage of pin #3 (VCTL).
4. Drive Output Circuit
V1
Q1
PVCC
V2
Q4
Q2
Q5
R1
VO1
RL
R2
M
VO2
Q3
Q6
V1 = 8.9V
V2 = 0.87V
VO1 = V1 - VBEQ1 - VBEQ2
VO2 = VQ6SAT
VO = VO1 - VO2 = V1 - VBEQ1 - VBEQ2 - VQ6SAT
IRL = (VO1 - VO2) / RL
7
 

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