FAN7631SJ FAIRCHILD [Fairchild Semiconductor], FAN7631SJ Datasheet

FAN7631SJ

Manufacturer Part Number

FAN7631SJ

Description

Advanced Pulse Frequency Modulation (PFM) Controller for Half-Bridge Resonant Converters

Manufacturer

FAIRCHILD [Fairchild Semiconductor]

Datasheet

1.FAN7631SJ.pdf (19 pages)

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FAN7631 • 1.0.2

FAN7631

Advanced Pulse Frequency Modulation (PFM)

Controller for Half-Bridge Resonant Converters

Features



Applications



Ordering Information

Variable Frequency Control with 50% Duty Cycle

for Half-Bridge Resonant Converter Topologies

High Efficiency with Zero-Voltage-Switching (ZVS)

Up to 600kHz Operating Frequency

Built-in High-Side Gate Driver

High Gate-Driving Current: +500mA/-1000mA

Programmable Dead Time with a Resistor

Pulse Skipping and Burst Operation for Frequency

Limit (Programmable) at Light-Load Condition

Simple Remote On/Off Control with Latch or

Auto-Restart (A/R) Using FI or LS Pin

Protection Functions: Over-Voltage Protection

(OVP), Overload Protection (OLP), Over-Current

Protection (OCP), Abnormal Over-Current Protection

(AOCP), Internal Thermal Shutdown (TSD), and

High Precise Line Under-Voltage Lockout (LUVLO)

Level-Change OCP Function During Startup

PDP and LCD TVs

Desktop PCs and Servers

Video Game Consoles

Adapters

Telecom Power Supplies

Part Number

FAN7631SJX

FAN7631SJ

Operating Junction

Temperature

-40C ~ 130C

16-Lead, Small-Outline Package (SOP)

Description

The FAN7631 is a pulse-frequency modulation controller

for high-efficiency half-bridge resonant converters that

includes a high-side gate drive circuit, an accurate

current-controlled oscillator, and various protection

functions. The FAN7631 features include variable dead

time, operating frequency up to 600kHz, protections such

as LUVLO, and a selectable latch or A/R protection using

the LS pin for user convenience.

The Zero-Voltage-Switching (ZVS) technique reduces the

switching losses and improves the efficiency significantly.

ZVS also reduces the switching noise noticeably, which

allows a small Electromagnetic Interference (EMI) filter.

Offering everything necessary to build a reliable and

robust resonant converter, the FAN7631 simplifies

designs and improves productivity and performance. The

FAN7631

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™)

Package

can

applied

resonant

Packaging

Tape & Reel

www.fairchildsemi.com

Method

Tube

April 2012

converter

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