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The AM4951/R/2 series is a single-phase BTL output fan motor driver designed by bipolar process. This IC features high efficiency, silent operation and includes lock shutdown and automatic restart functions. When the motor is under lock condition, the lock shutdown function turns off the output current. When the lock condition is removed, the IC will restart automatically and allow DC fan to run. It is applied for high reliability and low noise application, such as personal computers, notebook, car audio, CPU cooling systems and power supplies in consumer electronics systems.
BTL Output Single-phase Full-wave Linear Drive (Gain Resistor=1k to 360kΩ, Gain=51dB)
Support Low-voltage Drive and Feature a Wide Usable Voltage Range (2.2V to 24V)
Low Saturation Output (High Side and Low Side Saturation Voltage): VSAT_TOTAL=1.2V (typical, IOUT=200mA)
Built-in Lock Protection and Automatic Restart Circuits
Built-in FG/RD Output
Built-in Hall Sensor Bias (AM4952 Only, VHB=1.5V)
Thermal Protection Circuit
Small-sized, High Thermal Capacity Package
Notebook, Personal Computers
Power Supplies in Consumer Electronics, Car Audio and Office Peripherals