AH5794-WU-7 查看數據表（PDF） - Diodes Incorporated.

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AH5794-WU-7

SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER

Diodes Incorporated. 

AH5794

SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER

Operating Characteristics (Note 6, 7, 8 and 9)

S

Magentic

N

O2

O1

FG

Normal spinning

Ton Toff

Mechanical lock

motor locked detected

“Re-start spinning”

motor locked cleared

Truth Table

O1

O2

FG

L

H

L

H

L

H

X

L

L

(Note 9)

Notes:

6. In “Normal spinning, the FG changes its state at each edge of O1.

7. When the motor locks with South pole at the Hall element, O2 is kept on “L” and O1 is a clock with Ton/Toff ratio.

When motor locks with North pole at the Hall element, O1 is kept on “L”, O2 is a clock with Ton/Toff ratio.

8. When “Re-start spinning” occurs, the motor speed ramps up to the “Normal Spinning” speed from zero.

Speed ramp-up profile depends on motor characteristics.

9. X: H or L depends on magnetic pole North or South

AH5794

Document number: DS35809 Rev. 1 - 2

6 of 13

www.diodes.com

March 2012

© Diodes Incorporated

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