PT3921   12V All-in-One Single Coil Smart DC Fan IC

The PT3921 is designed for magnetic actuating using a bipolar magnetic field. The built-in dynamic offset cancellation of pre-amplifier stage achieves optimal symmetrical magnetic sensing. The output driver provides a linear drive to eliminate switching noise. This Hall-effect IC is optimal for DC brushless fan application. The supply voltage range is from 2.7V to 17V and the output current is 400mA.

• 2.7V~17V supply voltage
• Single phase full wave
• Soft switching output
• Built-in Hall sensor
• Motor locked protection & automatic restart
• ESD protection: 8KV
• Built-in hysteresis comparator
• Built-in Zener diode
• High sensitivity & low thermal drift magnetic sensing
• Low power consumption & high driving efficiency
• Support pre-driver application

• Single coil12V brushless DC fan
• Cooling fan for household electronics
• General purpose cooling fan solution e.g. Audio
• Cooling fan for game consoles.

         PT3921 /PKG:TO92 -4pin