L6232E

SPINDLE DRIVER

1.5A MAXIMUM PEAK CURRENT

CONTROLLED SLEW RATE

CENTRAL CHARGE PUMP

PWM AND LINEAR MODES

CUTOFF TIME USER CONFIGURABLE

FAST, FREE-WHEELING DIODES ON CHIP

OVER-TEMPERATURE PROTECTION

BRAKE FUNCTION INPUT

DESCRIPTION

The L6232E is a triple half bridge driver intended

for use in brushless DC motor applications. This

part can be used to form the power stage of a

three-phase, brushless DC motor control loop,

and is especially useful for disk drive applications.

Power drivers are Integrated DMOS transistors

and feature fast recirculating diodes as an integral

part of their structure. The logic inputs are TTL-

level compatible, with internal pull-up, allowing in-

terfacing to open collector outputs. All necessary

circuitry to perform PWM and linear motor speed

control is included. A central charge pump is util-

ized to drive the upper DMOS transistors, and

also to power the braking function. The L6232E is

packaged in PLCC28.

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

October 1996

BLOCK DIAGRAM

PLCC21+7

ORDERING NUMBER: L6232E

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