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KA3082 Fiches technique(PDF) 8 Page - Fairchild Semiconductor

No de pièce KA3082
Description  Bi-Directional DC Motor Driver
Download  12 Pages
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Fabricant  FAIRCHILD [Fairchild Semiconductor]
Site Internet  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA3082 Fiches technique(HTML) 8 Page - Fairchild Semiconductor

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KA3082
8
3. Logic Switch Circuit
This circuit define reference voltage of output.
When pin #5 is “H” and pin #6 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 #4 (VCTL).
4. Drive Output Circuit
V1 = 8.9V
V2 = 0.87V
VO1 = V1 - VBEQ1 - VBEQ2
VO2 = VQ6SAT
VO = VO1 - VO2
= V1 - VBEQ1 - VBEQ2 - VQ6SAT
IRL = (VO1 - VO2) / RL
5
6
4
SVCC
V1
V2
Q4
Q5
Q6
Q7
VCTL
7.4V
M
PVCC
V1
R1
Q1
Q4
V2
VO1
R2
VO2
Q3
Q6
Q2
Q5
RL


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