DESCRIPTION

The L6268 integrates into a single chip both spindle and VCM controllers as well as power stages. The device is designed for 12V disk drive application requiring up to 2.0A of spindle and 1.5A of VCM peak currents.

GENERAL

■ 12V (+/- 10) OPERATION.

■ REGISTER BASED ARCHITECTURE

■ MINIMUM EXTERNAL COMPONENTS

■ BICMOS + VERTICAL DMOS (1.5mm)

VCM DRIVER

■ 1.5A DRIVE CAPABILITY

■ 0.9W TOTAL BRIDGE IMPEDANCE AT 25°C

■ LINEAR MODE

■ PHASE SHIFT MODULATION (PWM MODE)

■ INSTANTANEOUS, (GLICH FREE) SWITCH BETWEEN THE 2 MODES

■ CLASS AB OUTPUT DRIVERS

■ ZERO CROSSOVER DISTORSION

■ 14 BIT DAC DEFINE OUTPUT CURRENT

■ SELECTABLE TRANSCONDUCTANCE

■ 4 PROGRAMMABLE PARKING VOLTAGE

■ DYNAMIC BRAKE