STMicroelectronics Introduces World's First Universal Lighting Controller

Mon Feb 11, 2013 9:00am EST

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Industry-unique device opens the way towards cost-effective, energy-efficient lighting systems in
the home, in the office, and on the street


Geneva, February 11, 2013 - Domestic, commercial and public lighting systems can now be made
greener, more economical, safer and more flexible, thanks to a unique device introduced by
STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the
spectrum of electronics applications and a world leader in power-management solutions. The world's
first programmable digital controller specifically optimized for lighting and power-supply
applications, the new STLUX385 
(Masterlux(TM) platform) simplifies the design of traditional power-conversion topologies,
enabling faster development of innovative lighting systems.

The key to the new possibilities for improving the performance of LED, fluorescent and HID
(High-Intensity Discharge) lighting systems is the STLUX385 's combination of a proven, cost-effective
STM8  microprocessor core and a unique set of
peripherals aimed at simplifying the design of the lighting power supply and digital control of
the lights. Depending on factors such as the lighting technology used, the input power source (AC
or DC), dimming requirements and safety or reliability issues, many different types of power
conversion and control topologies are required in the current and emerging lighting applications
and the STLUX385  is the first device able to
address all of these via a single programmable chip.

"More than 20% of the electricity generated is used to light our homes, streets, offices,
factories and public areas, and making lighting more efficient is an essential step on the path
towards a sustainable world," said Matteo Lo Presti, STMicroelectronics Group Vice President,
Industrial & Power Conversion Division. "The STLUX385 distils 25 years of ST leadership in power
conversion solutions into a single high value platform that customers can use to build more
innovative and efficient lighting solutions."

The STLUX385  achieves this goal primarily by
integrating six specially-designed peripherals called SMED (State Machine, Event-Driven) circuits
that interact with each other and with external signals via a programmable switching matrix to
control the power delivered to the lighting elements. In addition to the specific application
signals, the SMEDs can process external commands to turn the lights on/off or set the dimming
level, diagnostic signals such as open- or short-circuit detected, or inputs from sensors in
applications where the lighting is designed to adapt to ambient conditions.

For example, this opens the way towards intelligent LED street lamps that increase their
brightness gradually as daylight fades and, conversely, automatically reduce their brightness as
the sun rises instead of having only a full brightness or off-setting at predetermined times.

The STLUX385  allows sophisticated lighting
systems that currently require the use of expensive external Digital Signal Processors to be
produced with shorter time-to-market and lower costs. It allows light quality and its perception
to be improved through dedicated algorithms and energy saving through high-efficiency conversion
algorithms, while allowing new interactions between the user and the lighting system.

In addition to the six SMED peripherals, the STLUX385  also integrates a hardware DALI (Digital
Addressable Lighting Interface) peripheral. Digitally controlled lighting is the key to energy
saving in building and outdoor lighting installations and the DALI protocol is now in
international use across the lighting industry. The STLUX385  is compatible with wired or wireless
communications, simplifying the installation in large indoor and outdoor areas and reducing
maintenance costs.

The STLUX385  is available now in a compact
TSSOP38 package at a price of US$2 in quantities of 1,000 units.

Technical Notes

* Six configurable PWM State Machine Event Driven (SMED) outputs with10.4ns resolution (up to
1.3ns using automatic dithering)

* DALI Slave HW peripheral

* -40 ºC to 105 ºC outdoor temperature range

* Four Analog Comparators synchronized with a 96MHz clock

* Six fast digital inputs synchronized with a 96MHz clock

* STM8 core-based (up to 20 MIPS)

* 8-channel, 10-bit ADC with programmable op-amp gain and sequencer

* 3V to 5.5V DC voltage supply

About STMicroelectronics
ST is a global leader in the semiconductor market serving customers across the spectrum of sense
and power and automotive products and embedded processing solutions. From energy management and
savings to trust and data security, from healthcare and wellness to smart consumer devices, in the
home, car and office, at work and at play, ST is found everywhere microelectronics make a positive
and innovative contribution to people's life. By getting more from technology to get more from
life, ST stands for life.augmented.

In 2012, the Company's net revenues were $8.49 billion. Further information on ST can be found at

For Press Information Contact:
Michael Markowitz
Director Technical Media Relations
+1 781 591 0354 
ST Lighting Controller_PRODUCT IMAGE 
ST Lighting Controller 
ST Lighting Controller_BLOCK DIAGRAM 


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