FT3106

` FT3106 Three Phase Sensorless BLDC Motor Controller Description The FT3106 is a Three Phase sensorless BLDC Motor controller. Due to its adaptive features and wide power-supply range capabilities, it is intended to cover a wide range of motor characteristics, while requiring minimal tuning from the user. Speed adjustment can be achieved through either direct-PWM or analog voltage control. Speed indicator is provided through a Frequency Generator output, generating digital pulse with its frequency proportional to the speed of the motor. Protection functions of FT3106 are comprehensive including lock protection and automatic recovery, under voltage, thermal shutdown, current limit and over current protections. These prevent the control circuits and the motor from being damaged, particularly under stressed applications and demanding environments. Feature  Position sensorless BLDC controller  Two speed adjustment methods can be selected (direct-PWM and analog voltage control)  Lead angle control  FG (Frequency Generator)  Current limit and over current protection  Built-in lock protection and automatic recovery circuit  Built-in thermal shutdown protection (TSD)  Built-in under voltage lock out protection. (UVLO)  Built-in over voltage protection of motor driver Block Diagram VDD5 VREG10 FG VCC F/R ALIGN START BRAKE PWM TMOD FSOURCE SREF VTH LDO Saw Tooth Generator 2.5V RPI RSF INP OPO ADC INN TSD UVLO Control Engine xa BEMF VSS High Side Driver Low Si...