LB1890M Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Lista de partido

LB1890M

FDD Spindle Motor Driver

SANYO -> Panasonic 

LB1890M

Truth Table

Source → Sink

Hall-Effect Input

U VW

1

V-phase → W-phase

HH L

2

V-phase → U-phase

LHL

3

W-phase → U-phase

L HH

4

W-phase → V-phase

L

L

H

5

U-phase → V-phase

HLH

6

U-phase → W-phase

H

L

L

When an “H” level exists for hall-effect input,

U+ > U–

V+ > V–

W+ > W–

Index and Timing Chart

When SL equals an “H” level,

• T’ ≈ 0.693CR6

{ ( ) } • t’ ≈

CR6R7

R6 + R7

0.405 + 1n

R6 – R7

R6 – 2R7

When SL equals an “L” level,

• T’ ≈ 0.577CR6

{ ( ) } • t’ ≈

CR6R7

R6 + R7

0.522 + 1n

0.781R6 – R7

R6 – 2R7

Using only the ID pulse involves shorting DT1 and DT2.

No. 4354-7/8

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