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深圳市梦想电子有限公司
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产品信息
A4949GLJTR-T三相无刷传感器正弦风扇驱动器ALLEGRO
FEATURES AND BENEFITS
●180 sinusoidal drive for low audible noise. High eficiency control algorithm
. Sensorless operation
Analog Speed input (A4945)
PWM Speed input (A4949)
. Wide supply voltage range
. FG speed output
.Lock detection
Overcurrent protection
. Soft start
Short circuit protection
DESCRIPTION
The A4945 and A4949 three phase motor drivers incorporate
sinusoidal drive to minimize audible noise and vibration for
medium power fans.
ASpeed input is provided to control motor speed. This allows
system cost savings by eliminating an extemal variable power
supply. Alternatively, power supply modulation down to 4V
can be used to adjust motor speed.
The A4945 and A4949 are supplied in an 8-pin SOICN with
exposed power pad (sufix L), and an 8-pin SOICN (sufixL)
for wave solder aplications Both packages ae lead Pb) fee
with 1009%o matte-tin leadframe plating.