Diodes AH5794 - Manual (Page 7)

AH5794
SINGLE PHASE HALL EFFECT LATCH FAN MOTOR DRIVER
AH5794
Document number: DS35809 Rev. 1 - 2
7 of 13
www.diodes.com
March 2012
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T
Application Note
Motor Speed Control
DC Supply Voltage (V
DD
) Speed Control
Motor speed can be controlled by varying the V
DD
supply voltage between 1.8V to 6V.
With 5V nominal motor, changing V
DD
voltage between 5V to 1.8V, speed can be controlled from 100% to 36% typically.
Soft Switching
AH5794 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.