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FSFR1800HSL

FSFR-HS Series — Advanced Fairchild Power Switch (FPS™) for Half-Bridge Resonant Converters

Unspecified 

February 2013

FSFR-HS Series — Advanced 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)

 Built-in High-Side Gate Driver IC

 Internal UniFET™s with Fast-Recovery Type Body

Diode (trr=160 ns Typical)

 Fixed Dead Time (350 ns) Optimized for MOSFETs

 Operating Frequency Up to 600 kHz for Soft-Start

 Self Auto-Restart Operation for All Protections, Despite

External LVCC Bias

 Line UVLO with Programmable Hysteresis Level

 Simple On/Off with Line UVLO Pin

 Easy Configuration and Compatibility with FAN7930 for

Line UVLO without External Components

 Protection Functions: Over-Voltage Protection (OVP),

Over-Current Protection (OCP), Abnormal Over-

Current Protection (AOCP), Internal Thermal

Shutdown (TSD)

Applications

 PDP and LCD TVs

 Desktop PCs and Servers

 Adapters

 Telecom Power Supplies

Description

The FSFR-HS is a highly integrated power switch

designed for high-efficiency half-bridge resonant

converters. Offering everything necessary to build a

reliable and robust resonant converter, the FSFR-HS

simplifies designs while improving productivity and

performance. The FSFR-HS combines power MOSFETs,

a high-side gate-drive circuit, an accurate current-

controlled oscillator, and built-in protection functions.

The high-side gate-drive circuit has a common-mode

noise cancellation capability, which provides stable

operation with excellent noise immunity. Using zero-

voltage-switching (ZVS) technique dramatically reduces

the switching losses and significantly improves efficiency.

The ZVS also reduces the switching noise noticeably,

even though the operating frequency increases. It allows

a small Electromagnetic Interference (EMI) filter, besides

the high operating frequency, to reduce the volume of the

resonant tank and to increase power density.

The FSFR-HS can be applied to resonant converter

topologies such as series resonant, parallel resonant,

and LLC resonant converters.

Related Resources

AN4151 — Half-Bridge LLC Resonant Converter Design

Using FSFR-Series Fairchild Power Switch (FPS™)

Ordering Information

Part Number

FSFR1800HS

FSFR1800HSL

FSFR1700HS

FSFR1700HSL

Package

9-SIP

9-SIP

L-Forming

9-SIP

9-SIP

L-Forming

Operating

Maximum Output Power Maximum Output

Junction RDS(ON_MAX)

Temperature

without Heatsink

(VIN=350~400 V)(1,2)

Power with Heatsink

(VIN=350~400 V)(1,2)

-40 to +130°C 0.95 Ω

120 W

260 W

-40 to +130°C 1.25 Ω

100 W

200 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.

© 2011 Fairchild Semiconductor Corporation

FSFR1800 / FSFR1700-HS • Rev.1.0.1

www.fairchildsemi.com

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