SG3524 PWM Controller is not included in the standard Proteus library, and an official simulation model is not natively provided by Labcenter Electronics. To use it in your designs, you must either download a third-party library or import a SPICE model for simulation. Where to Download
Yes, almost all user-shared libraries are free. Some paid sites bundle it, but avoid them.
: Frequency is set by an external resistor ( RTcap R sub cap T ) and capacitor ( CTcap C sub cap T
To simulate the SG3524 in Proteus, you typically need two types of files: the and the simulation (SPICE) model .