FAN8082 데이터 시트보기 (PDF) - Fairchild Semiconductor

부품명

상세내역

제조사

FAN8082

Bi-directional DC Motor Driver

Fairchild Semiconductor 

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

Share Link: