LB1876 데이터 시트보기 (PDF) - ON Semiconductor

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LB1876

Monolithic Digital IC For Polygon Mirror Motors 3-phase Brushless Motor Driver

ON Semiconductor 

LB1876

Continued from preceding page.

Pin No. Pin name

Function

22 PD

Phase comparator output pin.

The phase error is converted to a pulse duty and output from

this pin.

23 CLD

Phase lock signal mask time setting pin.

A mask time of about 90ms can be set by inserting a

capacitor (about 0.1μF) between this pin and ground. Leave

this pin open if there is no need to mask.

Equivalent curcuit

VREG

300Ω

22

VREG

300Ω

23

24 FGS

FG Schmitt output pin.

Open collector output.

VREG

24

25 LD

Phase lock detection output pin.

Open collector output.

VREG

Turns on (goes low) when phase lock is detected.

25

26 S/S

Start/stop control pin.

Low: 0 to 1.5V

High: 3.5V to VREG

Hysteresis: About 0.5V

Apply a low level to start; this pin goes high when open.

VREG

27 CLK

30

VCC

Clock input pin.

Low: 0 to 1.5V

High: 3.5V to VREG

Hysteresis: About 0.5 V

fCLK = 10kHz maximum

If there is noise on the clock signal, remove that noise with a

capacitor.

Power supply pin

Insert a capacitor between this pin and ground to prevent

noise from entering the IC. (Use a value of 20 or 30μF or

higher.)

VREG

22kΩ

2kΩ

26

22kΩ

2kΩ

27

Continued on next page.

No.6201-8/12

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