Forward converters are mainly used in AC-to-DC power supplies, and are a form of galvanic isolated buck converter. These converters are used for offline applications requiring higher output power than flyback circuits. Compared to flyback converters, forward converters are more energy efficient. The block diagram will help you make the right choice from a wide range of recommended products.
AN2775: Forward converter for cash register applications
AN4006: Designing a high-efficiency (60 W on 4 pairs) PoE converter using the PM8803 and an external current booster