DESCRIPTION
The voice coil driver L6246 is a linear power amplifier designed to drive single phase bipolar DC motors for hard disk drive applications. The device contains a selectable transconductanceloop, which allows high precision for head positioning. The power stage is composed of 2 power amplifiers, in AB class, with 4 DMOSs, with Rdson of 0.5Ω (Sink+Source) maximum, in a H-bridge configuration. Drive voltage for the upper DMOS FETs is provided by a charge pump circuit to ensure low Rdson.

■ 12V (±10%) OPERATION
■ 3A MAXIMUM CURRENT CAPABILITY
■ 0.3Ω MAXIMUM ON RESISTANCE OF EACH POWER DMOS AT A JUNCTION TEMPERATAURE OF 25°C
■ CLASS AB POWER AMPLIFIERS
■ LOGIC AND POWER SUPPLY MONITOR
■ POWER ON RESET
■ PARKING FUNCTION WITH SELECTABLE RETRACT VOLTAGE AND DYNAMIC BRAKE BEFORE PARKING
■ ENABLE FUNCTION
■ GATE DRIVER FOR EXTERNAL BLOCKING N-MOSFET
■ OVERTEMPERATURE PROTECTION
■ OVERTEMPERATURE WARNING OUTPUT
■ PQFP44 PACKAGE