Application circuit of external tachometer generator

According to the typical application circuit , when the power supply voltage changes to 6-16V, the motor load
torque changes to 0. 08-1. 2mN. m, the motor speed changes within 0.2%U.
The motor used here is a 3-slot, R.-16n, working speed n-2000r/min . The data of external components used in the
circuit are shown in Table 2-6. The table also shows the performance changes that may be caused by parameter
changes.
    3 Other applications The chip can also be used for external applications of various tachometer generators,
such as electromagnetic single-phase AC tachometer generators, photoelectric encoders, Hall tachometer generators , etc.
  Note that when the speed measurement signal is input from pin l, it is best to have a double diode clamp. In the example shown in Figure 2-43
  , the control logic signal and speed setting level of pins 18 and 19 are given by the microprocessor
  (given from the D/A of the microprocessor).
    The 9 and 12 pin outputs can also be connected to an external high-power H-bridge integrated circuit (such as L298,
  etc.) to expand the output current and drive a larger power motor .