Phase-shifted LED backlight driver supports ultra-thin notebooks LCD panels for the first time
September 02, 2011 // Paul Buckley
Semtech Corp., has launched the first device in its innovative platform of phase-shifted boost LED drivers. The new SC5010 is an 8-channel white LED driver with an innovative PWM phase-shift dimming control that uses low-profile inductors, allowing LED drivers to be built directly into the LCD panel in Ultrabook PCs and ultra-mobile PCs (UMPC) for displays as thin as 4 mm.
The SC5010 delivers higher efficiency when using the same size inductors as existing phase-shifted LED drivers, but unlike these devices, the SC5010 can operate with inductors that are up to 10X smaller while maintaining high efficiency. This enables LED drivers to be designed directly into the panel, even in ultra-thin applications. This is due to the sophisticated control loop architecture, which allows the use of inductors as small as 2.2 H (1mm height). The phase-shifted technology in the SC5010 also minimizes demand on the input and output capacitance offering the high efficiency of conventional non-phase shifted switching regulators, with significantly lower noise, less EMI, and no need for noise filtering components.
The SC5010 is an 8-channel boost LED driver that can power up to 112 LEDs, with currents up to 30 mA per channel. The integrated control loop architecture of the device allows programmable switching frequencies as fast as 2.2 MHz and is the key to enabling phase-shifted dimming using small, low-profile inductors. Additionally, this approach reduces BOM size and cost by eliminating external compensation and noise filtering components.
Semtechs innovative loop architecture also prevents display flicker and shutdown caused by line transients that can occur in automotive applications. This is achieved via the ultra-fast transient response of the SC5010, which allows it to handle line transients up to 10 V/s.
The SC5010 LED driver brings to market a rich feature set for the next generation of displays, including the flexibility of I2C and three PWM dimming control modes. It features a wide PWM input dimming range of 5000:1 at 200 Hz and a dimming frequency range from 100 Hz to 30 kHz. The SC5010 also provides user-selectable 9 or 10 bit dimming resolution and a 5-bit analog dimming register that can be used in conjunction with PWM to increase the dimming resolution.All news
Micrel's 10 criteria for choosing a MEMS foundry
April 18, 2014
Micrel Inc. (San Jose, Calif.) has prepared an article that lays out the 10 criteria to help guide someone in the choice ...
Superconducting qbits made immune to quasiparticle energy loss
The Filter Wizard: Just add a transistor
Mobile display revenues soar, leaving TV behind
European organic PV project aims for material gains
Nanomaterial-packed cathode extends range of EV lithium-sulfur batteries
April 17, 2014
Researchers at the USA's Department of Energy Pacific Northwest National Laboratory have developed a metal organic framework ...
Wearable computing market on 78% CAGR through 2018
OLED TV shipment delays stall OLED material growth
BMW updates navigation via mobile radio connection
- USB 5V 2.5A Output, 42V Input Synchronous Buck with Cable Drop Compensation
- Measurement applications across multiple test platforms
- Supplying DC input power to string inverters
- Supplying DC input power for HEV testing
InterviewHeartbleed challenges the Internet of Thing
The Heartbleed security bug is a key example of the fundamental security challenge for the Internet of Things says Green Hills Software as it launches a new security group.
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
This month, Arrow Electronics is giving away ten XMC1200 lighting application kits, worth 100 Euros each, for EETimes Europe's readers to win.
Each kit combines Infineon’s brightness and colour control XMC1200 CPU board to drive flicker free LED dimming and colour changing, together with a colour LED card and a white LED card.
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.