Application of TC9142P in PLL control of photocopier imaging motor

TC9142P is used in copiers. In plain paper copiers
(PPC). The imaging motor uses a three-phase Hall brushless DC motor, which requires high-precision
and stable speed control. The control circuit is shown in Figure 4-22. Four
integrated circuits produced by Toshiba, TC 9142P dedicated PLL integrated circuit, TA76494P (
discrete with TI494, etc.) universal switching power supply PWM regulator, TA7712P three-phase full-duration Hall motor controller
and MP6901 three-phase inverter bridge are used here. The power switch module and a few peripheral components form a
complete PLL control system.