LB11923V
PIN FUNCTIONS (continued)
Pin No.
Pin
Functions
11
POUT Speed control system PLL output Outputs the
phase comparison result for CLK and FG.
Equivalent Circuit
VCC1
11
13
INT REF Integrating amplifier non-inverting input
(1/2 VCC potential)
VCC1
14
INT IN Integrating amplifier inverting input
500 W
13
15
INT OUT Integrating amplifier output (speed control)
VCC1
16
TOC
Torque command input
Normally, this pin is connected to the INT.OUT
pin. The PWM duty is increased when the TOC
pin voltage falls.
Do not apply a voltage that exceeds
VCC – 0.5 V to this pin. (An input from a normal
operational amplifier is desirable.)
16
VCC1
300 W
500 W
14
15
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11