LB11922

No.7497-9/15

Continued from preceding page.

Pin No.

Pin name

Function

Equivalent circuit

11

INT OUT

Integrating amplifier output (speed control).

11

VCC

12

PWM

PWM oscillator frequency setting.

Connect a capacitor between this pin and

ground.

VCC

300

Ω

12

13

CSD

Sets the operating time of the constrained-rotor

protection circuit.

Reference signal oscillator used when the

clock signal is cut off and to prevent

malfunctions.

The protection function operating time can be

set by connecting a capacitor between this pin

and ground.

This pin also functions as the logic circuit block

power-on reset pin.

VCC

300

Ω

13

Reset circuit

15

16

XO

XI

Oscillator circuit connections.

XO : Output pin

XI : Input pin

A reference clock can be generated by

connecting an oscillator element to these pins.

If an external clock with a frequency of a few

MHz is used, input that signal through a series

resistor of about 5.1k

Ω.

The XO pin must be left open in this case.

VCC

15

16

18

FGOUT

FG amplifier output.

This pin is connected to the FG Schmitt

comparator circuit internally in the IC.

18

VCC

FG Schmitt comparator

Continued on next page.