LB1997

No. 5978-1/9

LB1997

Three-Phase Brushless Motor Driver

for CD-ROM Spindle Drive

Monolithic Digital IC

The LB1997 is a three-phase brushless motor driver

especially suited for CD-ROM spindle motor drives.

Functions

• Current linear drive

• Control V type amplifier

• Separate power supply for output upper side bias

circuit allows low output saturation by boosting this

power supply only (useful for 5V power supply types).

• Upper side current detection technique reduces loss

voltage of current detection resistor. Voltage effect of

this resistor reduces internal current drain of IC.

• Built-in short braking circuit

• Built-in reverse blocking circuit

• Hall FG output

• Built-in S/S function

• Built-in current limiter circuit

• Built-in Hall power supply

• Built-in thermal shutdown circuit

• V type control/single-side control switching pin allows

CLV and CAV operation.

Package Dimensions

unit: mm

3222-HSOP28

[LB1997]

Overview

SANYO : HSOP28

Ordering number : EN5978A

60499RM(KI)/22699RM(KI)

114

0.3

0.8

15

28

2.7

15.2

0.8

0.2

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

0

–20

20

40

60

75 80

100

0.4

0.8

1.2

1.6

2.0

0

Ambient temperature, Ta –

°C

Pd max – Ta

With substrate

1.5

0.6

IC only