Miniature control IC for energy-efficient white-LED backlights simplifies circuit design
September 29, 2011 // Christoph Hammerschmidt
STMicroelectronics has extended its portfolio of energy-saving solutions for mobile devices with an IC that simplifies the design of power-efficient LCD and keypad backlights comprising white LEDs.
Backlights built with white LEDs instead of traditional fluorescent tubes consume less power and thus enable longer battery life for portable devices such as smartphones, games and GPS terminals. ST's new chip, the STLA02, improves backlight design by performing high-side current sensing, which allows the backlight negative (low-side) terminal to be connected directly to ground with no need for a low-side sensing connection. This simplifies pc-board design, reduces wired connections to the backlight, and increases system reliability.
The STLA02 can drive up to six LEDs and can operate from a supply voltage as low as 2.5V, allowing its use in systems powered by only a single lithium cell. The maximum input voltage of 18V also allows use with a variety of other battery types.
The STLA02 expands ST's already large portfolio of devices that help reduce size and increase battery life in feature-rich portable products, leveraging in-house process technologies for class-leading integration and power efficiency. These include highly efficient DC-DC converters, audio ICs and class-D amplifiers, ambient light sensors, motion sensors, and high-performance low-power microcontrollers such as the STM8 and STM32 families.
Key features of STLA02 are boost (step-up) DC-DC converter topology, a wide battery supply voltage range of 2.5V to 18V and a maximum LED driving voltage of 27V. The PWM dimming range is 300: 1. Over-temperature and over-voltage protection are integrated.
The STLA02 is in full production in the 6-lead DFN6 package, priced from $0.892 for orders over 1000 units. Alternative pricing options may be available for larger quantities.
For further information please visit www.st.com/vregsAll news
Are you worth insuring? Wearables to decide
January 30, 2015
At Cicor's first Innovation Insights Symposium held in Zurich end of January, the focus was very much on smart wearables ...
Security flaw in BMW's ConnectedDrive detected
Quantum entanglement now on-a-chip
Single crystal perovskites promise cheaper solar cells and LEDs
Wafer-scale perovskite solar cells on the horizon
Spread Spectrum Frequency Modulation Reduces Automotive LED Driver EMI
January 30, 2015
The large number of electronics in an automobile must have reasonably low electromagnetic interference (EMI) in order to ...
Privately-owned car not on the red list, study says
Private equity buys Canadian MEMS foundry
Tronics launches IPO
- Accelerate SDN and NFV with Off-the-Shelf Software
- Sensing Elements for Current Measurements
- Investigating Die attach Failure in IGBTs using Power Cycling Tests
- Power Semiconductor Failure Diagnosis using Thermal Characterization and Power Cycling
InterviewCEO interview: Bosch's IoT startup is all about the system
Thorsten Mueller, CEO of Bosch Connected Devices and Solutions GmbH (Reutlingen, Germany), has been guiding the latest startup subsidiary of Robert Bosch GmbH since 2013 when he started the initiative ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.