FAN7621 Datasheet | onsemi

DATA SHEET .onsemi. PFM Controller for Half-Bridge Resonant Converters SOP16 CASE 565BF Description The FAN7621 is a pulse frequency modulation controller for high- efficiency half- bridge resonant converters. Offering everything necessary to build a reliable and robust resonant converter, the FAN7621 simplifies designs and improves productivity, while improving performance. The FAN7621 includes a high- side gate- drive circuit, an accurate current controlled oscillator, frequency limit circuit, soft- start, and built- in protection functions. The high- side gate- drive circuit has a mon- mode noise cancellation capability, which guarantees stable operation with excellent noise immunity. Using the zero- voltage- switching (ZVS) technique dramatically reduces the switching losses and efficiency is significantly improved. The ZVS also reduces the switching noise noticeably, which allows a small- sized Electromagnetic Interference (EMI) filter. The FAN7621 can be applied to various resonant converter topologies; such as series resonant, parallel resonant, and LLC resonant converters. Features - Variable Frequency Control with 50% Duty Cycle for Half- bridge Resonant Converter Topology - High Efficiency through Zero Voltage Switching (ZVS) - Fixed Dead Time (350 ns) - Up to 300 k Hz Operating Frequency - Pulse Skipping for Frequency Limit (Programmable) at Light- Load Condition - Remote On/Off Control Using CON Pin - Protection Functions: Over- Voltage Protection (OVP), Overload Protection (OLP), Over- Current Protection (OCP), Abnormal Over- Current Protection (AOCP), Internal Thermal Shutdown (TSD) Applications - PDP and LCD TVs - Desktop PCs and Servers - Adapters - Tele Power Supplies - Video Game Consoles Related Resources - AN- 4151 - Half- Bridge LLC Resonant Converter Design using FSFR- series Power Switch MARKING DIAGRAM $Y&Z&2&K FAN7621 FAN7621 = Device...