L6285S datasheet(9/16 Pages) STMICROELECTRONICS

Numer części	L6285S

Szczegółowy opis	3 CHANNELS MULTIPOWER SYSTEM

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CHC DC Motor Driver

The DC motor driver is a DMOS full bridge with a

PWM Open Loop Voltage Control. Fig.5 shows

the theory of operation. The Cosc Capacitor is

charged by a constant current source. The oscil-

lating voltage value is from 0V to the V1 level in-

ternally fixed at V1 = 2/3 VS. The output duty cy-

cle is controlled by the V2 voltage. The opera-

tional range of V2 is from 200mV to V1. Fig.3

shows the DMOS status during PWM: tON and

tOFF bridge configurations. While the PWM Duty

Cycle defines the motor speed (not controlled

since the loop is open),the logic level of IN1 and

IN2 can choose the direction of the motor.

Figure.5: DC Motor Driver CHC

L6285

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