FAN7621 is a PWM controller from Fairchild Semiconductor for 384W LLC resonant half-bridge converter. It features high efficiency, low voltage drop, low dead time, etc.
This document provides a reference design for the Fairchild FAN7621 PFM controller, targeting a 384W half-bridge resonant converter. It includes schematic details, transformer specifications, and efficiency curves. The design uses Fairchild’s FEP16FT/FET16FTA and FEP16BT/FET16BTA rectifiers and FCPF11N60 SuperFET™ MOSFETs. Key features include variable frequency control, zero voltage switching, and multiple protection functions. The document also includes transformer winding details and electrical characteristics for design implementation.
| Input Voltage Range | 340~400Vpc |
|---|---|
| Output Power | 384W |
| Operating Frequency | Up to 300kHz |
| Transformer Core | EED4244D (Ae=158 mm2) |
| Primary-Side Inductance | 240uH+5% |
Up to 300kHz Operating Frequency.
EED4244D with Ae=158 mm2.