LED Driver ICs offer up to 16 channels of constant current.
Press Release Summary:
Power Logic STPxxC596 and STPxxCL596 integrate functions needed to drive LEDs at constant current, set by external resistor. Once set, feedback mechanism monitors current and dynamically adjusts output to maintain programmed current level. Units are available in 8 or 16 output versions, with 3.3 and 5 V input voltages, and programmable output current from 15-120 mA. They accept serial data through SPI and use internal shift register and latches to set data for each output.
Original Press Release:
STMicroelectronics Offers Single-chip Approach to LED Control
Up to 16 channels of constant current drive for industrial lighting applications
Geneva, March 11, 2005 - STMicroelectronics (NYSE: STM) 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.
This press release is also available at:
st.com/stonline/press/news/year2005/p1525d.htm ....and includes links to further information on these products and ST's complete range of digital ICs.
About STMicroelectronics
STMicroelectronics is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange, on Euronext Paris and on the Milan Stock Exchange. In 2004, the Company's net revenues were $8.76 billion and net earnings were $601 million. Further information on ST can be found at www.st.com.
