Diodes AH5795 Manuel d'utilisateur télécharger pdf (Page 8)

AH5795

SINGLE PHASE HALL EFFECT LATCH SMART

FAN MOTOR CONTROLLER

AH5795

Document number: DS35277 Rev. 1 - 2

8 of 13

www.diodes.com

August 2011

NEW PRODUCT

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)

Enabled

Disabled

(Toff cleared)

Enabled

65ms (max)

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

Vss

Vout 1

Vout 2

200µs typ.

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Diodes AH5795 Manuel d'utilisateur Page 8