High efficiency charge pump with power saving CABC mode focuses on smartphone LED backlighting
November 22, 2010 // Paul Buckley
ON Semiconductor has introduced a 6-channel, high efficiency Quad-Mode LED driver for use in the latest smartphones and other consumer handheld applications such as digital still cameras and portable media players. The Quad-Mode architecture coupled with Content Adaptive Brightness Control (CABC) claims to ensure market leading efficiency in LED backlighting using only external capacitors.
Differentiating itself from other devices currently on the market, the highly efficient CAT3649 has a total of four charge pump modes (1x, 1.33x, 1.5x and 2x), rather than the customary three. The inclusion of a 1.33x mode increases its efficiency by up to 10 percent compared to traditional charge pump LED drivers using 1.5x operation. This allows the handheld products into which it is incorporated to extend their battery life.
The Quad-Mode fractional charge pump supports a wide range of input voltages, from 2.4 V to 5.5 V. The LED current can be adjusted by analogue dimming in 32 linear increments via the 1-wire interface. Further adjustment can be carried out through PWM. The PWM dimming control is compatible with CABC for PWM signal frequencies from 100 Hz) to 200 kHz.
Packaging and Pricing
The CAT3649 is offered in a compact 3.0 mm x 3.0 mm, Pb−free TQFN−16 package. Pricing for these devices is $0.49 per unit in 100,000 unit quantities.
Visit ON Semiconductor at www.onsemi.com
Motor drive analyser leverages 8-channel, high-definition oscilloscope
March 02, 2015
Targeting developers of electric motor drives and related power circuitry, Teledyne LeCroy has introduced the MDA800 Series ...
Tronics offers to license MEMS processes to foundries
OmniVision, eyeSight, push gesture towards the smartphone
Fraunhofer, Nokia jointly run LTE-A testbed
NXP, Freescale plan mega merger
Semitrex' ultimate goal: "one size fits all" power conversion
March 02, 2015
After two years in stealth mode and having filed 46 patents around a capacitive voltage reduction technology dubbed muxcapacitor, ...
Graphene polymer speeds electron transport
Samsung phones pack 14nm SoC
Benchmark Stresses Big Chips
- High Performance Portable DC Bench Power Supply: Save Money and Free Up Bench Real Estate by Building Your Own
- Software-Defined Radio Handbook
- A Four-Quadrant DC/DC Switching Regulator Smoothly Transitions from Positive to Negative Output Voltages for FPGA and Other Applications
- LED Driver with Integrated Spread Spectrum Reduces EMI without Adding Flicker
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
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.