FAN7621S: PFM Controller for Half-Bridge Resonant Converter

Description: The FAN7621S is a pulse frequency modulation contr...
  • The FAN7621S 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 FAN7621S simplifies designs and improves productivity, while improving performance. The FAN7621S 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 common-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 significantly improves efficiency. The ZVS also reduces the switching noise noticeably, which allows a small-sized Electromagnetic Interference (EMI) filter. The FAN7621S 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: 350ns
  • Up to 300kHz Operating Frequency
  • Auto-Restart Operation for All Protections with an External LVCC
  • Protection Functions: Over-Voltage Protection (OVP), Over-Current Protection (OCP), Abnormal Over-Current Protection (AOCP), Internal Thermal Shutdown (TSD)
  • Applications
  • LED TV
  • PDP TV
  • Lighting
  • Technical Documentation & Design Resources
    Availability and Samples
  • Status: Active
  • Compliance: Pb-free 
  • Description: PFM Controller for Half-Bridge Resonant Converter
  • Package Type: SOP-16
  • Package Case Outline: 565BF
  • MSL: 1
  • Container Type: REEL
  • Container Qty: 2000
  • Specifications
  • Topology:  
  • Control Mode:  
  • fsw Typ (kHz):  
  • Stand-by Mode:  
  • UVLO (V):  
  • Short Circuit Protection:  
  • Latch:  
  • Soft Start:  
  • VCC Max (V):  
  • Drive Cap. (mA):  
  • Package Type: SOP-16 
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