STMicroelectronics Offers Single-chip Approach to LED Control

Mar 12, 2005

STMicroelectronics has introduced a set of single-chip LED driver ICs for industrial lighting, signage and transport applications.
The Power Logic STPxxC596 and STPxxCL596 family integrates the functions needed to drive LEDs at a constant current, set by an external resistor. Once set, a feedback mechanism monitors the current in one LED or a string of LEDs and dynamically adjusts the output to maintain the programmed current level.

The parts are available in eight or 16 output versions, with 3.3V and 5 V input voltages and four package types. The parts accept serial data through Serial Peripheral Interface (SPI) and use an internal shift register and latches to set the data for each of the LED outputs. An output enable controller can switch each LED on or off, dim it or make it flash. The parts have a clock and data re-synchronization function, which is useful when the devices are cascaded (daisy chain configuration).

The output current of the parts is programmable from 15mA up to 120mA (with a 5V supply). The device can work with a power supply from 3.3V up to 5V, which means it can be directly controlled by a microprocessor or logic circuit without level translators.

The STP08C596 has eight output channels, each of which can provide 15 to 120mA constant current to drive the LEDs. It is available in DIP-16, SO-16 and TSSOP16.

The STP08CL596 has eight output channels, each of which can provide 15 to 90mA constant current to drive the LEDs. It runs from a 3.3V supply and is available in DIP-16 and SO-16.

The STP16C596 has 16 output channels, each of which can provide 15 to 120mA constant current to drive the LEDs. It is available in DIP-24, SO-24, TSSOP24 and the thermally efficient exposed-pad TSSOP24.

The STP16CL596 has 16 output channels, each of which can provide 15 to 90mA constant current to drive the LEDs. It runs from a 3.3V supply and is available in DIP-24, SO-24, TSSOP24 and the thermally efficient exposed-pad TSSOP24.

Pricing ranges from US$0.64 to US$0.93 in quantities of 10,000 pieces.

Explore further: Timeline of the Sony Pictures Entertainment hack

add to favorites email to friend print save as pdf

Related Stories

A bright future for LEDs

Dec 05, 2014

A single wafer-level LED chip that produces more than 150 Watts of light output has been made in work form China. This level of output from a single chip makes applications for LEDs in high power lighting ...

Engineers efficiently 'mix' light at the nanoscale

Nov 13, 2014

The race to make computer components smaller and faster and use less power is pushing the limits of the properties of electrons in a material. Photonic systems could eventually replace electronic ones, but ...

Fighting crime through crowdsourcing

Nov 12, 2014

Crowdsourcing utilizes the input of a crowd of online users to collaboratively solve problems. To advance this emerging technology, researchers at the University of Miami are developing a computing model that uses crowdsourcing ...

Recommended for you

Timeline of the Sony Pictures Entertainment hack

22 minutes ago

It's been four weeks since hackers calling themselves Guardians of Peace began their cyberterrorism campaign against Sony Pictures Entertainment. In that time thousands of executive emails and other documents ...

Two more former Sony workers sue over data breach

22 minutes ago

Two more former employees of Sony Pictures Entertainment are suing the company over the massive data breach in which their personal and financial information was stolen and posted online.

Second security clearance investigation contractor hacked

52 minutes ago

Federal officials say the private files of 48,439 workers may have been compromised by a computer breach at government contractor KeyPoint Government Solutions Inc. The hacking incident is the second this year at a major ...

Digital dilemma: How will US respond to Sony hack?

1 hour ago

The detective work blaming North Korea for the Sony hacker break-in appears so far to be largely circumstantial, The Associated Press has learned. The dramatic conclusion of a Korean role is based on subtle ...

Constantly changing online prices stump shoppers

1 hour ago

Online shopping has become as volatile as stock market trading. Wild, minute-by-minute price swings on everything from clothes to TVs have made it difficult for holiday shoppers to "buy low."

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.