NXP mains-dimmable
drivers and controller
for LED lighting
SSL21082(A)/84(A)
& SSL2129A
Design LED lights with best-in-class
dimmer compatibility per watt
These`best-in-class`mains-dimmable`SSL`GreenChip`ICs,`suitable`for`use`in`isolated`and`non-
isolated`compact`LED`driver`topologies,`deliver`excellent`efficiency`and`reduce`system`cost.
Key features
`
` Superb`mains-dimmable`LED`driver`solution`(both`leading`
and`trailing`edge`phase`cut`dimmers)
`
` Buck`driver`ICs
-`Integrated`300`V`MOSFET`(SSL21082,`SSL21082A)
-`Integrated`600`V`MOSFET`(SSL21084,`SSL21084A)`
`
` Flyback`or`buck`controller`IC
-`Controller-only`with`external`MOSFET`(SSL2129A)
-`Supports`tapped-buck`topologies`to`extend`the`V
f`
LED`
range
`
` Highest`efficiency`due`to:`
-`Power-efficient`boundary`conduction`mode`
-`Start-up`JFET
`
` High`power`factor`(>0.9)
`
` Full`range`of`internal`protections
`
` Compatible`with`wall`switches`with`built-in`indication`light`
during`standby
`
` “A”`versions`without`short`winding`protection
Key benefits
`
` Benchmark`dimmer`compatibility`per`watt
`
` Compact,`single-stage`LED`driver`solution`lowers`eBOM`
cost
`
` Optimized,`high-efficiency`operation`improves`total`lumen`
output`per`watt,`lowering`energy`consumption`further
Applications
`
` Dimmable`retrofit`LED`lamps
`
` Dimmable`driver`modules`for`LED`lighting
The`NXP`SSL2129A`is`a`high-efficiency`controller`IC`for`
superior`dimmable`LED`lighting`solutions`that`typically`
operates`in`the`lamp`power`range`of`4`to`25`W.`
The`straightforward`design`produces`a`cost-effective`yet`
compact`application,`suitable`for`use`with`GU10`and`PAR16`
formats.`A`low-cost`bipolar`bleeder`circuit`supports`a`best-
in-class`dimmer`compatibility`performance`for`mainstream,`
single-stage`LED`driver`applications.
The`SSL2129A`can`be`configured`in`either`buck`(non-isolated)`
or`flyback`(isolated)`topologies`at`mains`supply`voltages`of`100`
to`120`V`or`230`V.
As`part`of`the`same`dimmable`product`family,`NXP`also`offers`
driver`ICs`with`an`integrated`MOSFET.`The`SSL21082(A),`with`a`
300`V`MOSFET,`is`designed`for`applications`in`the`100`to`120`V`
range,`while`the`SSL21084(A),`with`a`600`V`MOSFET,`is`for`use`
with`230`V`mains`supply`voltages.`Both`ICs`support`dimmable`
LED`lamp`powers`up`to`15`W,`while`easing`the`design-in`
process.
When`comparing`the`performance`of`dimmable`LED`driver`
solutions`operating`at`the`same`lamp`power`levels,`dimmer`
compatibility`per`watt`is`a`more`meaningful`parameter`than`
dimmer`compatibility`alone.`
NXP`determines`lamp`performance`from`the`end-user`
perspective`by`using`a`combination`of`these`criteria,`resulting`
in`a`power`merit`factor`that`is`based`on`two`aspects.`The`first`
aspect`is`stability,`which`refers`to`how`well`the`lamp`avoids`
visual`disturbances`like`flicker,`shimmer`and`flashing.`
Type number
SSL2129A`
SSL21082(A)
SSL21084(A)
The`second`aspect`is`controllability,`which`refers`to`how`
precisely`the`user`can`control`and`reduce`the`lamp’s`light`output.`
LED`driver`applications`based`on`NXP’s`dimmable`SSL`driver`ICs`
show`a`great`dimmer`compatibility`per`watt`at`a`very`high`power`
merit`factor.`Dimmer`compatibility`per`watt`not`only`depends`
on`IC`features,`but`also`on`the`system`implementation.``NXP’s`
application`expertise,`know-how`and`customer`support`are`of`
crucial`importance`in`designing`a`mains`dimmable`LED`driver`
solution.
The`long`life`time`of`LED`lamp`solutions,`in`combination`with`
the`impressive`energy`savings,`result`in`significant`reduction`
of`energy`usage`(supporting`a`green`environment`at`very`low`
energy`cost)`and`low`maintenance`cost.
MOSFET
External
300`V`/`2`Ω
600`V`/`5`Ω
Nominal mains
100`to`230`V
100`to`120`V
230`V
Lamp power
4`to`25`W
Up`to`15`W
Up`to`15`W
Package
SO8
SO12
SO12
SSL2129AT 230 V / 5.5 W dimmable buck reference design
SSL2129AT block diagram
www.nxp.com
© 2012 NXP Semiconductors N.V.
All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The
information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and
may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof
does not convey nor imply any license under patent- or other industrial or intellectual property rights.
Date of release: September 2012
Document order number: 9397 750 17337
Printed in the Netherlands
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