Description

This COMBO Driver for HDD application consists of Sensorless Spindle Driver and BTL type VCM Driver.

Bipolar Process is applied and a “Soft Switching Circuit” for less commutation noise and a “Booster Circuit for smaller Saturation Voltage of Output Transistor are also implemented.

Features

• Soft Switching Driver

Small Surface Mount Package: FP-80E (QFP80 Pin)

Low thermal resistance: 35°C/W with 6 layer multi glass-epoxy board

• Low output saturation voltage

- Spindle 0.8 V Typ (@1.0 A)

- VCM 0.8 V Typ (@0.8 A)

Functions

• 1.8 A Max/3-phase motor driver

• 1.2 A Max BTL VCM Driver

• Auto retract

• Soft Switching Matrix

• Start up circuit

• Booster

• Speed Discriminator

• Internal Protector (OTSD, LVI)

• POR

• Power monitor