No. 7099-6/12

LB1929

Pin No.

Symbol

Pin Description

Equivalent circuit

Crystal oscillation pin.

Connection of a crystal oscillator causes generation of the

reference clock.

To enter the clock (a few MHz) externally, connect a resistor

of about 5.1 k

Ω in series to the XI pin and enter the signal

via the resistor. In this case, keep XO pin open.

9

10

XI

XO

10

VREG

9

Integrating amplifier output pin (speed control pin)

11

INT

OUT

PWM comparator

VREG

11

40k

Ω

Integrating amplifier input pin

12

INT

IN

VREG

300

Ω

12

PLL output pin.

13

POUT

13

VREG

300

Ω

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