LB1821 datasheet(13/16 Pages) SANYO

Part #	LB1821

Description	Power Brushless Motor Pre-Driver IC for OA Equipment

PDF	16 Pages

Scroll/Zoom	100%

Manufacturer	SANYO [Sanyo Semicon Device]

Direct Link	https://www.sanyo-av.com/us/

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13 / 16 page

No. 5686-13/16

LB1821M

Continued from preceding page.

Pin No.

Functions

Equivalent circuit

Speed discriminator count switching

Low: 0 to 1.5 V

High: 4.0 V to VCC

An open state functions as a high-level input.

The hysteresis is about 0.45 V.

FGSOUT

FG amplifier output (after the Schmitt circuit)

This is an open collector output.

FGOUT

FG amplifier output

This pin is connected to the FG Schmitt comparator circuit

internally in the IC.

FGIN–

FG amplifier inverting input

FGIN+

FG amplifier noninverting input (1/2 VCC potential)

An initial reset is applied to the logic circuit block by

connecting an external capacitor (of about 0.1 µF) between

the FGIN+ pin and ground.

16 to 18

38 to 40

GND

Ground connections

These pins are all connected internally to the frame.

Continued on next page.

FG Schmitt comparator

FG reset circuit

LB1821 Datasheet(PDF) 13 Page - Sanyo Semicon Device