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-48T (QFP48 Pin)

• Low thermal resistance: 30°C/W with 4 layer multi glass-epoxy board

• Low output saturation voltage

- Spindle 1.44 V Typ (@1.8 A)

- VCM 1.0 V Typ (@1.0 A)

Functions

• 2.2 A Max/3-phase motor driver

• 1.5 A Max BTL VCM Driver

• Auto retract

• Soft Switching Matrix

• Start up circuit

• Booster

• Speed Discriminator

• Internal Protector (OTSD, LVI)

• POR

• Power monitor