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