FAN7621S

Datasheet Buy Sample

Controller for Half-Bridge Resonant Converters

General Description

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.

Product Status/Pricing/Packing

Product Product Status Eco Status *Pricing Package Type Leads Packing Method Package Drawing **Package Marking Convention Qualification Support RoHS IPC1752 RoHS/REACH/
JIG Certificate of Compliance
FAN7621SSJ Last time buys being accepted ROHS Compliant $0.83 SOP 16L 16 RAIL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code) &K
Line 2:FAN7621S
Moisture Sensitivity Level (MSL) :  1  
Max Reflow Temp :  260  
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FAN7621SSJX Full Production ROHS Compliant $0.83 SOP 16L 16 TAPE REEL PDF Line 1:$Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code) &K
Line 2:FAN7621S
Moisture Sensitivity Level (MSL) :  1  
Max Reflow Temp :  260  
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XML opens in a new window
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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
  • Lighting
  • PDP TV

Application Notes

Videos

LED Lighting Total Solutions

FSFR2100 Demo - Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters

FSFR2100 - LLC Resonant Converter Solutions

View all videos

Reference Designs


Application Document Number Featured Products Output
Power
Input
Voltage
Topology
PDP TV RD-325 FAN7621, FAN7621B, FAN7621S 384W 340-400VAC LLC Half-Bridge Converter
Power Supply LCD TV RD-324 FAN7621, FAN7621B, FAN7621S, FQPF8N60C, FQPF8N60CF, FYP2010DN 200W 340-400VAC LLC Resonant Half-Bridge Converter
LED SMPS RD-L013 FAN7621S, FAN7930B, FCPF11N60NT, FDPF7N60NZ, FL7930B 150W 85-277VAC CRM PFC + LLC H/B
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