Use UC3634 to control single-phase brushless DC motor

UC3634 The circuit structure and function of the motor phase-locked loop control
integrated circuit UC3634 are basically the same as UC3633, see Figure 4-14. The only difference is that in order to meet the needs of
single-phase dual-winding brushless DC motor applications, the 5-pin and 6-pin outputs are complementary
drives. The motor has a Hall position sensor, which is connected to pin 7 of UC3634.
In addition to getting a multiplied speed feedback signal and sending it to the phase detector like UC3633, it also
generates a commutation signal and outputs it from pins 5 and 6. Its driving capability is 20V, 30mA.
Using a piece of UC3634 and an external transistor , a complete single-phase four-pole brushless
DC motor phase-locked speed stabilizing circuit can be obtained, as shown in Figure 4-15. The motor speed is also 3600r/min.