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Chip description：
The GC5958 provides all the circuitry for sensor-less speed control of three-phase brushless DC motor. The Sine-wave Driver Method will be better low-noise. The controller functions include start-up circuit, back-EMF commutation control, Pulse Width Modulation (PWM) speed control, lock protection, and thermal shutdown circuit.The GC5958 is suitable for both game machine and  CPU cooler that need silent drivers. It is available in DFN3x3-10 package.

Chip features：
?  PWM Quasi-Sinusoidal Driver
?  Three-Phase Sensor-Less Drive Method
?  Adjustable Forced Commutation Frequency
(for Start-up)
?  Built-In External PWM Speed Control
?  Built-In Quick Start Function
?  FG (Rotation Speed Detection) Output
?  Soft Switching Circuit (for Noise Reducing)
?  Power Saving Function (PWM Duty Input
is 0%)
?  Built-In Lock Protection and Auto Restart
Function
?  Thermal Shutdown Circuit