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Ordering number : EN5979A

LB1998

Monolithic Digital IC

LB1998

Three-Phase Brushless Motor Driver

for CD-ROM Spindle Drive

Overview

The LB1998 is a three-phase brushless motor driver

especially suited for CD-ROM spindle motor drives.

Package Dimensions

unit: mm

3234-HSOP28HC

[LB1998]

15.3

6.2

2.7

28

15

Functions

鈥?Current linear drive

鈥?Control V type amplifier

鈥?Top side current detection technique reduces loss

voltage of current detection resistor. Voltage effect of

鈥?/div>

this resistor reduces internal current drain of IC.

Built-in current limiter circuit

Built-in reverse blocking circuit

Hall FG output

Built-in 1 Hall FG/3 Hall FG switching circuit

Built-in short braking circuit

Built-in Hall bias cicuit

Built-in thermal shutdown circuit

Built-in S/S function

Built-in 3 mode gain switching function ensures

compatibility with 8/12 cm CAV and CLV discs

7.9

0.65

0.25

1

0.85

0.8

0.3

2.5max

0.1

2.25

SANYO : HSOP28HC

2.0

Pd max 鈥?Ta

With substrate (114.3 mm脳76.1 mm脳1.6 mm

3

)

Allowable power dissipation, Pd max 鈥?W

1.8

1.6

1.2

1.08

0.8

IC only

0.79

0.474

0.4

0

鈥?5

0

Ambient temperature, Ta 鈥?/div>

擄C

25

50

75

1.3

10.5

4.9

100

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft's

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

60499RM(KI)/30299RM(KI) No. 5979-1/9

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LB1998 Datasheet

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