SG3524 Regulating Pulse Width Modulator

The SG2524 contains two identical npn transistors, the collectors and emitters of which are uncommitted. Each transistor has antisaturation circuitry that limits the current through that transistor to a maximum of 100 mA for fast response.

There are a wide variety of output configurations possible when considering the application of the SG2524 as a voltage-regulator control circuit. They can be segregated into three basic categories:

_ Capacitor-diode-coupled voltage multipliers

_ Inductor-capacitor-implemented single-ended circuits

_ Transformer-coupled circuits

Figure 1. Capacitor-Diode Output Circuit

Figure2. Flyback Converter Circuit

Figure 3. Single-Ended LC Circuit

Figure 4. Push-Pull Transformer-Coupled Circuit