Fairchild FAN7621 service manual

www.fairchildsemi.com

Reference Design RD-325

Fairchild PFM Controller FAN7621 - 384W Design

Featured Device Application

FAN7621
FEP16FT/FET16FTA
FEP16BT/FET16BTA

FCPF11N60

PDP TV 340~400V

Input Voltage

Range

Output Voltage

(Rated Current)

DC

210V /1.4A

60V / 1.5A

Rated Output

Power

384W

Topology

LLC Resonant

Half-Bridge

Converter

Key Features

FAN7621

 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
 Pulse Skipping for Frequency Limit (Programmable) at Light-Load Condition
 Remote On/Off Control Using Control Pin
 Various Protection Functions: Over-Voltage Protection (OVP), Overload Protection (OLP), Over-Current

Protection (OCP), Abnormal Over-Current Protection (AOCP), and Internal Thermal Shutdown (TSD)

FEP16FT

 300V/16A Ultra-Fast Recovery Rectifier, Common Cathode
 Low Forward-Voltage Drop: 1.3V at T

= 25oC, 8A

A

FEP16FTA

 300V/16A Ultra-Fast Recovery Rectifier, Common Anode
 Low Forward-Voltage Drop: 1.3V at T

FEP16BT

= 25oC, 8A

A

 100V/16A Ultra-Fast Recovery Rectifier, Common Cathode
 Low Forward-Voltage Drop: 0.95V at T

FEP16BTA

= 25oC, 8A

A

 100V/16A Ultra-Fast Recovery Rectifier, Common Anode
 Low Forward-Voltage Drop: 0.95V at T

FCPF11N60

= 25oC, 8A

A

 600V/11A SuperFET™
 Low Gate Charge: Typical: 40°C
 Low R

: 0.38Ω Max. at TA 25oC

DS,ON

© 2009 Fairchild Semiconductor Corporation 1 RD-325_FAN7621 • Rev. 0.0.1

www.fairchildsemi.com

1. Schematic

FAN7621

Figure 1. Schematic

© 2009 Fairchild Semiconductor Corporation 2 RD-325_FAN7621 • Rev. 0.0.1