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AH5795

SINGLE PHASE HALL EFFECT LATCH SMART FAN MOTOR CONTROLLER

Diodes Incorporated. 

AH5795

SINGLE PHASE HALL EFFECT LATCH SMART

FAN MOTOR CONTROLLER

Application Note (cont.)

Rotor lock Toff and PWM signal

When PWM signal input at PWM pin is low for longer than 65ms, internal rotor lock protection Toff is cleared. This allows the

device to enter motor start Ton time on the next PWM high signal

PWM

Rotor lock protection

(internal signal)

65ms (max)

Enabled

Disabled

(Toff cleared)

Enabled

Soft Switching

AH5795 uses soft switching of the motor coil current during commutation for to minimize audible switching noise and

electromagnetic interference (EMI) to provide a low noise solution.

Vdd

Vout 1

Vout 2

Vss

200µs typ.

AH5795

Document number: DS35277 Rev. 1 - 2

8 of 13

www.diodes.com

August 2011

© Diodes Incorporated

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