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AH5792

SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER

Diodes Incorporated. 

Functional Block Diagram

AH5792

SINGLE PHASE HALL EFFECT LATCH SMART

FAN MOTOR CONTROLLER

Vdd

Power

Hall

Sensor

AMP

V SS

FG

Frequency

Generator

O1

Logic Full Bridge

Block

Driver

O2

Lock

Detector

Operating (Note 3, 4, 5)

S

Magentic

N

Out 1

Out 2

FG

Normal spinning

Ton Toff

Mechanical lock

“Re-start spinning”

motor locked detected

motor locked cleared

Notes:

3. In “Normal spinning, the FG shall change its state at each rising edge of OUT2. In “Mechanical lock”, the FG state is kept as the

same as the moment of motor locked detected.

4. When magnetic is locked as “S” pole, then out1 is kept on “L”, out2 is a clock with Ton/Toff ratio. When magnetic is locked at

“N” pole, then out 2 is kept on “L”, out 1 is a clock with Ton/Toff ratio.

5. When “Re-start spinning” occurs, the motor shall ramp up to the “Normal Spinning” speed from zero. It depends on the motor

characteristics.

AH5792

Document number: DS314641 Rev. 6 - 2

3 of 10

www.diodes.com

July 2010

© Diodes Incorporated

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