|
|
LED driver paints 68 billion colours
6 February 2008, Opto-Electronics
austriamicrosystems has expanded its LED driver offering with an LED driver suited for full colour applications such as LED video displays, LCD TV backlighting, indoor/outdoor full-colour LED displays and large-size stadium displays.
The AS1112 offers an integrated PWM of 12 bits with 4096 greyscale steps per colour, reaching up to 68 billion colours with RGB. Additionally, the integrated 6-bit dot-correction allows adjusting the output current in 64 steps to compensate for LED luminous mismatch. The device offers high accuracy of ±4,5% between channels and ICs, line regulation of 2,5% and load regulation of 0,5%.
The AS1112 features 16 regulated current ports which provide constant currents for driving LEDs within a wide range of forward voltages. The output ports are guaranteed to endure a maximum voltage of 15 V, allowing multiple LEDs to be combined in series to a single pixel to increase brightness. Currents can be adjusted from 0 to 80 mA via an external resistor.
The IC's built-in LED error detection can detect any open- or short-circuit as well as any over-temperature occurrence. Two temperature thresholds allow detailed thermal surveillance of the system. For immediate detection of errors a global error pin is available; furthermore, a detailed error report can be read out with the exact position of the broken LED. The AS1112 uses the serial data input/output lines for this information so that no additional PCB tracks are needed for LED error diagnostics.
The fast 30 MHz serial interface of the AS1112 ensures high refresh rates even for huge LED display modules. A power-down function reduces the supply current to 40 nA in standby mode. The IC has an operating temperature range from -40 to +85°C and is available in the small, thermally efficient 32-pin TQFN (5 x 5 mm) package. For more information contact ASIC Design Services, +27 (0)11 315 8316, info@asic.co.za, www.asic.co.za, NuVision Electronics, +27 (0)11 894 8214, calim@nuvisonelec.co.za, www.nuvisionelec.co.za |
|
|
|
| Share: |
 |
Via email client |
 |
 |
 |
 |
print |
|
|
|
|
|
Further reading:
- LED flicker, and how to prevent it
28 August 2019, Avnet South Africa, Opto-Electronics
With the growing popularity of LED lighting, especially now that very cheap LED luminaires are coming to the market, flicker is becoming more of a problem.
Flicker, a repetitive switching on and off ...
- Digital fibre-optic sensor
28 August 2019, Vepac Electronics, Opto-Electronics
The DFS digital fibre-optic sensor series from Tri-Tronics is designed to provide reliable detection using plastic fibre-optic light guides.
The slim-line housing with protective lid will fit in a variety ...
- All-in-one light pipe system
28 August 2019, Vepac Electronics, Opto-Electronics
Bivar’s Zero Light Bleed adaptor technology, with built-in surface-mount LED, channels light directly to the lens, eliminating disruptive light bleed.
The all-in-one adaptor system is built with optimum ...
- NuVision Electronics to host wireless seminars
28 August 2019, NuVision Electronics, News
NuVision Electronics will soon be holding a seminar series highlighting its offering of technology for the wireless development ecosystem. The two seminars are free of charge to attend, and will take ...
- SDR enhancements to automotive radio tuners
31 July 2019, NuVision Electronics, Telecoms, Datacoms, Wireless, IoT
Silicon Labs has introduced new hybrid software-defined radio (SDR) tuners, expanding its portfolio to meet the growing need of automotive radio manufacturers to support all global digital radio standards ...
- Lithium battery charger IC
31 July 2019, NuVision Electronics, Power Electronics / Power Management
The MP2667 from Monolithic Power Systems is a highly integrated, single-cell, Li-ion/Li-polymer battery charger with system power path management for space-limited portable applications. The MP2667 takes ...
- High-intensity colour LEDs
31 July 2019, Würth Elektronik eiSos, Opto-Electronics
Würth Elektronik has expanded its LED portfolio with a particularly compact model family. The WL-SMCC series of SMT chip LEDs, available in 0402 and 0603 packages, is characterised by a full-surface lens ...
- RGB LEDs for decorative lighting
26 June 2019, Würth Elektronik eiSos, Opto-Electronics
Würth Elektronik’s new WL-SFTW and WL-SFTD series of RGB LEDs are targeted at accent and decorative lighting, optical displays as well as industrial applications. Thanks to their PLCC contacting design, ...
- Passive filter design for an ultra-low noise buck regulator
26 June 2019, NuVision Electronics, Power Electronics / Power Management
Switched-mode power supplies (SMPS) have the advantage of high efficiency compared to traditional low-dropout (LDO) regulators. Due to its switching nature, an SMPS emits noise at its switching frequency ...
- 4,3” TFT LCD module
26 June 2019, iCorp Technologies, Opto-Electronics
The RFE430W-AYW-DNN from Raystar is a 4,3” TFT display with a resolution of 480 x 270 pixels. It has a built-in SC7283 driver IC and supports an RGB 24-bit interface, with brightness of 500 nits, an aspect ...
- High-intensity colour LEDs
26 June 2019, Würth Elektronik eiSos, Opto-Electronics
Würth Elektronik has expanded its LED portfolio with a particularly compact model family. The WL-SMCC series of SMT chip LEDs, available in 0402 and 0603 packages, is characterised by a full-surface lens ...
- LEDs recognised for achieving natural light spectrum
29 May 2019, NuVision Electronics, Opto-Electronics
Seoul Semiconductor’s SunLike range of natural spectrum LEDs, first announced in 2017, have gone on to be recognised as an innovative technology for human-centric lighting at global lighting awards held ...
|
|
