LB1821 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LB1821

Power Brushless Motor Pre-Driver IC for OA Equipment

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin

LB1821M

Functions

Speed discriminator count switching

Low: 0 to 1.5 V

11

N2

High: 4.0 V to VCC

An open state functions as a high-level input.

The hysteresis is about 0.45 V.

12

FGSOUT

FG amplifier output (after the Schmitt circuit)

This is an open collector output.

Equivalent circuit

FG amplifier output

13

FGOUT This pin is connected to the FG Schmitt comparator circuit

internally in the IC.

FG Schmitt comparator

14

FGIN– FG amplifier inverting input

FG reset circuit

FG amplifier noninverting input (1/2 VCC potential)

15

FGIN+

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.

No. 5686-13/16

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