CIRCUITO INTEGRATO DI CONTROLLO DI COMMUTAZIONE DI CORRENTE IN CARICHIINDUTTIVI MULTIPLI ESTERNI CONFIGURABILE

摘要

A "multipurpose" integrated circuit for driving in a switching mode an externally connected load or loads permits to implement any appropriate supply scheme of the external load or loads through six output terminals thereof and is therefore useful in a large number of applications. The integrated circuit uses six integrated power switching devices provided with respective recirculation diodes and may conveniently use a single externally connected sensing resistor for generating, by means of a customary PWM control loop, a control signal which by means of a logic circuit configurable by programming permits the generation of driving signals function of said control signal for all six integrated power switches in accordance with a configuration of said driving signals which is functionally in conformity with the particular scheme of connection of the load or loads selected among the different bridge type and unipolar-motor type schemes which may be selected by programming. A preferred embodiment contemplates the use of a multiplexer for selecting among bridge type driving signals and unipolar-motor type driving modes and a ROM provided with two input registers for selecting the specific driving scheme and for regulation, respectively.