FL663 datasheet(2/15 Pages) ONSEMI

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June 2015

www.fairchildsemi.com

FL663

• Rev. 1.0

FL663

Primary-Side-Regulation PWM Controller for

LED Illumination

Features

 Low Standby Power: < 30 mW

 High-Voltage Startup

 Few External Component Counts

 Constant-Voltage (CV) and Constant-Current (CC)

Control without Secondary-Feedback Circuitry

 Green-Mode: Linearly-Decreasing PWM Frequency

with Cycle skipping.

 Fixed PWM Frequency at 50 kHz and 33 kHz with

Proprietary Frequency Hopping to Solve EMI

Problems

 Peak-Current-Mode Control in CV Mode

 Cycle-by-Cycle Current Limiting

 V

DD Over-Voltage Protection (OVP)

 V

DD Under-Voltage Lockout (UVLO)

 Adjustable Brownout Detector

 Gate Output Maximum Voltage Clamped at 15 V

 Thermal Shutdown (TSD) Protection

 Available in the 8-Lead SOIC Package

Applications

 LED Illumination

 Battery chargers for cellular phones, cordless

phones, PDA, digital cameras, power tools

Description

This third-generation Primary-Side-Regulation (PSR)

and highly integrated PWM controller provides features

to enhance the performance of LED illumination.

The proprietary topology, TRUECURRENT

®, enables

precise CC regulation and simplified circuit for LED

illumination applications. The result is lower-cost and

smaller LED lighting compared to a conventional design

or a linear transformer.

minimize

standby

power

consumption,

the

proprietary

green-mode

function

provides

off-time

modulation to linearly decrease PWM frequency with

cycle skipping under light-load conditions. Green mode

assists the power supply in meeting the power

conservation requirements.

using

the

FL663,

LED

illumination

can

implemented

with

few

external

components

and

minimized cost.

Figure 1.

8-Lead SOIC

Ordering Information

Part Number

Operating

Temperature Range

Top Mark

Package

Packing

Method

FL663MX

-40°C to +125°C

FL663

8-Lead, Small-Outline Package (SOIC-8)

Tape & Reel

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