The L6506 is a linear integrated circuit designed to sense and control the current in stepping motors and other similar devices. When used in conjunction with power stages like the L293, L298N, or L7180, the chip set forms a constant current drive for inductive loads and performs all the interface functions from the control logic through the power stage. The L6506 may be used with either two phase bipolar or four phase unipolar motor configurations.
The document describes using the L6506 linear integrated circuit to sense and control current in stepping motors. It details applications with two-phase bipolar or four-phase unipolar motor configurations, often used with power stages like the L293, L298N, or L7180.
The note covers current control logic using Pulse Width Modulated (PWM) control via a sense resistor and an on-chip oscillator. It provides guidance on synchronizing multiple devices to avoid ground noise and selecting external components for the oscillator circuit.
The L6506 may be used with either two phase bipolar or four phase unipolar motor configurations.
The minimum value for R1 of 700Q (1 KQ —30 %) should be used to guarantee the required pulse width.