LB1998

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 Current linear drive Control V type amplifier Top side current detection technique reduces loss voltage of current detection resistor. Voltage effect of 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 – Ta With substrate (114.3 mm×76.1 mm×1.6 mm3) Allowable power dissipation, Pd max – W 1.8 1.6 1.2 1.08 0.8 IC only 0.79 0.474 0.4 0 –25 0 Ambient temperature, Ta – °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 m...