PT3911   24V All-in-One Double Coil Smart DC Fan IC

The PT3911 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 28V and the output current is 400mA. The PT3911 providing a wider supply voltage makes itself capable to support cooling fan from 5V to 24V.

• 2.7V~28V supply voltage
• Soft switching output
• Built-in Hall sensor
• Motor locked protection & automatic restart
• ESD protection: 8KV
• Built-in hysteresis comparator
• Built-in protection Zener diode
• High sensitivity & low thermal drift magnetic sensing
• Low power consumption & high driving efficiency

• 5V/12V/24V double coils DC brushless fan motor
• Revolution counting
• Cooling fan for household electronics
• Cooling fan for OA equipments
• General purpose cooling fan solution e.g. Audio
• Cooling fan for game consoles.

       PT3911 /PKG:TO92 -4pin