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TB6575FNG  
PWM Sensorless Controller for 3-Phase Full-Wave BLDC Motors
 

TB6575FNG.pdf
 
The TB6575FNG provides sensorless commutation and PWM
 
current control for 3-phase full-wave BLDC motors. It controls
rotation speed by changing a PWM duty cycle by analog voltage. 
 

Features
1.3-phase full-wave sensorless drive
2.PWM chopper drive
3.PWM duty cycle control by analog input
4.20-mA current sink capability on PWM output pins
5.Overcurrent protection
6.Forward/reverse rotation
7.Lead angle control (7.5!a and 15!a
8.Overlap commutation
9.Rotation speed sensing signal
10.DC excitation mode to improve startup characteristic
11.DC excitation time and forced commutation time for startup operation can be changed.
12.Forced commutation frequency can be selected. (f/(6 !¨¢  ), f /(6 !¨¢  ), f /(6 !¨¢  ) )
13.Output polarity switching (P-channel + N-channel, N-channel + N-channel)