OUT_SET pin mirrors the IIN_SET current set by the external resistor RSET. Any change on the IIN_SET current will be mirrored to the OUT_SET pin.
PWM may be applied in two different ways in an application.
PWM via PWMI-pin When PWM is applied via PWM-pin of the first IC only, this will not be propagated to the second and subsequent ICs. Reason is that the IN_SET current is not affected by the PWMI-pin status and will remain stable during the deactivation phase of the PWM. Therefore, the second IC channels will be constantly active while the first IC channel will operate in PWM. In this case, we have to apply the same PWM to the PWMI-pin of all the ICs in the application.
PWM via IN_SET-pin When PWM is applied via IN_SET pin of the first IC only, this will be propagated to the second and subsequent ICs. IN_SET current will change according to the PWM and those changes will be mirrored to the OUT_SET pin and therefore will be propagated to the second IC.
IN_SET to OUT_SET activation and deactivation delay times have to be considered for a synchronized result (P_6.6.10, P_6.6.11).