Document
FSFR-US Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter
May 2010
FSFR-US Series — Fairchild Power Switch (FPS™)
for Half-Bridge Resonant Converters
Features
Variable Frequency Control with 50% Duty Cycle for Half-Bridge Resonant Converter Topology High Efficiency through Zero Voltage Switching (ZVS) Internal UniFET™s with Fast-Recovery Type Body Diode Fixed Dead Time (350ns) Optimized for MOSFETs 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)
Description
The FSFR -US seri es a re a high ly inte grated p ower switches de signed for high-efficiency ha lf-bridge resonant co nverters. O ffering ev erything ne cessary to build a reliable and robust resonant converter, the FSFRUS seri es si mplifies de signs and improves prod uctivity, while improv ing perf ormance. T he FSFR -US serie s combines power MOSFETs with fast-recovery type body diodes, a high-side gate-drive circuit, an accurate current controlled oscillator, frequency limit circuit, soft-start, and built-in pr otection fu nctions. T he high- side gat e-drive circuit has a common-mode noise cancellation capability, which gu arantees st able o peration w ith ex cellent noise immunity. The fast-recovery body diode of the MOSFETs improves rel iability aga inst abn ormal ope ration conditions, w hile minimizing the e ffect of the rev erse recovery. U sing th e z ero-voltage-switching ( ZVS) technique dramatically reduces the switching losses and efficiency i s significantly i mproved. T he ZVS also reduces the sw itching no ise noticeably, w hich al lows a small-sized Electromagnetic Interference (EMI) filter. The FSFR-US series can be applied to various resonant converter to pologies such as ser ies re sonant, para llel resonant, and LLC resonant converters.
Applications
PDP and LCD TVs Desktop PCs and Servers Adapters Telecom Power Supplies
Related Resources
AN4151 — H alf-bridge LLC Resonant C onverter D esign TM using FSFR-Series Fairchild Power Switch (FPS )
Ordering Information
Part Number FSFR2100US FSFR1800US FSFR1700US FSFR2100USL FSFR1800USL FSFR1700USL 9-SIP L-Forming 9-SIP -40 to +130°C Package Operating Junction Temperature RDS(ON_MAX) 0.51Ω 0.95Ω 1.25Ω 0.51Ω 0.95Ω 1.25Ω Maximum Output Power without Heatsink (1,2) (VIN=350~400V) 180W 120W 260 100W 200 180W 400 120W 260 100W 200 Maximum Output Power with Heatsink (1,2) (VIN=350~400V) 400W W W W W W
Notes: 1. The junction temperature can limit the maximum output power. 2. Maximum practical continuous power in an open-frame design at 50°C ambient.
© 2009 Fairchild Semiconductor Corporation FSFR-US Series • Rev.1.0.2
www.fairchildsemi.com
http://www.Datasheet4U.com
FSFR-US Series — Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converter
Application Circuit Diagram
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