A4945
FEATURES
AND BENEFITS
- 180° sinusoidal drive for low audible noise
- High efficiency 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
PACKAGES:
DESCRIPTION
The A4945 and A4949 three phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power fans.
A Speed input is provided to control motor speed. This allows system cost savings by eliminating an external variable power supply. Alternatively, power supply modulation down to 4 V can be used to adjust motor speed.
The A4945 and A4949 are supplied in an 8-pin SOICN with exposed power pad (suffix LJ), and an 8-pin SOICN (suffix L) for wave solder applications. Both packages are lead (Pb) free with 100% matte-tin leadframe plating.
8-pin SOICN
8-pin SOICN with exposed thermal pad
(L package)
(LJ package)
Not to...
