L7208中文資料意法半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書

Description

L7208 is available in an ultra-thin package and is optimized for 1.8 inch and sub-1.8 inch consumer equipment drives.

The spindle motor driver subsystem integrates all power FETs driven by STs Smooth Drive? commutation technology.

The voice coil driver block includes the power FETs, emergency retract function as well as ramp load and unload capability.

Positive and negative regulators are integrated together with provision for shock sensing and free-fall detection.

Extremely low power consumption, in all modes of operation, is achieved by an optimized chip partitioning enabling extended battery life in consumer applications.

L7208 embeds a serial interface with a maximum speed of 50 MHz

General features

■ Register Based Architecture

■ 3 wire serial port up to 50MHz

■ Ultra-thin package

Spindle driver

■ 0.5A peak current drive capability

■ Integrated power driver devices

■ ST Smooth Drive? architecture

■ Current sense with zero external components

■ Inductive sense start-up support

VCM driver

■ 0.5A peak current drive capability

■ Integrated power driver devices

■ 14 Bit linear DAC for current command

■ Ramp load/unload and emergency retract support

Other functions

■ Integrated positive and negative switching regulators

■ Shock detect circuitry

■ 10-bit ADC

■ POR on reset with integrated delay

■ Free fall interface