FLYBACK CONTROLLERS

Small-Spaced Dimming Challenges Solved

with LED Lamp Driver IC

LED LAMP DRIVER IC

Advantages

• Highfunctionaldensityina

smallformfactor

• Upto60%boardspace

savingscomparedtoother

solutions

• Upto20%lowerbillof

materialcostscompared

toothersolutions

• Digitalpowerfactor(PF)

realizationgreaterthan0.9

• Lowertotalharmonic

distortion(THD)

• 90%electricalefficiency

regulations

Applications

• Decorativelighting

• Low-powerlighting

For more information, please visit:

www.fairchildsemi.com/pf/FL/FL7701.html

www.fairchildsemi.com/ledlighting

Engineering

Connections

Need to Design a Dimmable LED Lamp

Small Enough to Fit Existing Sockets?

Read the latest in our blog at

www.fairchildsemi.com/engineeringconnections.

With Fairchild’s FL7701 smart non-isolated Buck LED driver with power factor

correction, designers attain efficient dimming solutions that also fit within exist-

ing sockets. Because the need to work reliably in a small space while providing

high efficiency is imperative, the device uses a digital technique that allows it to

automatically detect the AC input voltage condition. A special internal reference

signal is then created, resulting in high power factor correction. The FL7701 will

work from a DC input voltage condition, automatically sensing AC versus DC

input voltage conditions. It also combines high functional density to create the

smallest form factor and allows designers to save up to 20% BOM costs and up

to 60% board space savings.

The LED driver provides energy savings that meet the most stringent worldwide

of integration offered by the FL7701. The result is increased luminary lifespan

to more than five years (current solution only achieves three years.) And reli-

ability is also improved since no electrolytic capacitors for the input, output or

the FL7701 V

Typical application

Product

Number

Topology

PFC

Dimming

CC Variance

(%)

Frequency

(kHz)

Package

FL7701

Non-Isolation

PFC Buck

Yes

Yes

3

Variable

SOIC-8