LB1997 Datasheet, PDF (1/9 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

Ordering number : EN5978A
LB1997
Monolithic Digital IC
LB1997
Three-Phase Brushless Motor Driver
for CD-ROM Spindle Drive
Overview
The LB1997 is a three-phase brushless motor driver
especially suited for CD-ROM spindle motor drives.
Package Dimensions
unit: mm
3222-HSOP28
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.
[LB1997]
28
15
1
14
0.8
2.7
0.3
0.2
15.2
0.8
SANYO : HSOP28
Pd max – Ta
2.0
1.6
1.5
With substrate
1.2
0.8
IC only
0.6
0.4
0
–20
0
20
40
60
75 80
100
Ambient temperature, Ta – °C
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)/22699RM(KI) No. 5978-1/9