OVERVIEW
The PT3937 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 4.5V to 30V.
FEATURE
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Built-in hall sensor
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Single phase full wave driver
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Soft switching output driver
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Motor locked protection and automatic restart
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RD output
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Built-in hysteresis comparator
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Built-in Zener diode
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High balance and low thermal drift magnetic sensing
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Low power consumption and high driving efficiency
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Thermal protection
APPLICATIONS
Single coils DC brushless motor
Support pre-driver application
PACKAGE