6 W LED driver suits backlighting

15 April 2009 Opto-Electronics

ON Semiconductor has introduced a new 6 W LED driver with an integrated, high-power DC-DC boost converter and on-chip diagnostics to maximise efficiency in large, general purpose LCD panel backlighting applications.

As the company’s first multichannel boost device, the CAT4106 is capable of driving as many as 40 white LEDs – or four strings of 10 LEDs with up to 36 V per string – for a total of 6 W of LED output power. Additionally, the device enables designers to maximise backlighting efficiency and reduce space via its built-in diagnostics functions, which automatically adjusts the output voltage to drive the highest forward voltage string with the minimum headroom voltage.

The on-chip diagnostic circuit allows designers to set the minimum and maximum voltage limits for the acceptable range of operation for LED strings through external programming resistors. Any channel which does not regulate within the set range of open circuit or short circuit LEDs will be detected and flagged on the FAULT logic output. The device also provides thermal shutdown and overvoltage protection (OVP).

The CAT4106 features low dropout LED channels of 500 mV at 175 mA and a high-frequency PWM interface, which supports multiple frequencies up to 2 kHz, providing precise, high-resolution dimming control while the device remains fully biased.

Further reading:

Mouser broadens its LED lineup
Opto-Electronics
Mouser has broadened its LED lineup with diverse solutions designed to support lighting, medical, and smart home applications.

Read more...

---

High-quality optoelectronics components
Opto-Electronics
LEDs make up the bulk of Lite-On’s product range, and all popular types are manufactured from the ubiquitous round LEDs designed for through-hole mounting to state-of-the-art structures, integrated with programmable control systems.

Read more...

---

NTC thermistors for laser diode temperature measurement
Electrocomp Opto-Electronics
These bondable NTC thermistors can be mounted with Au wire bonding inside the package for highly accurate temperature detection of laser diodes used for optical communication.

Read more...

---

Touch screen enables wise data visualisation
Rugged Interconnect Technologies Opto-Electronics
ADLINK offers comprehensive industrial-grade touch monitors and smart panels with in-house value-added customisation.

Read more...

---

Upgraded GUIs on STM32 microcontrollers
Altron Arrow Opto-Electronics
TouchGFX has now been upgraded to version 4.22, which sees many new features to aid developers with their user experience.

Read more...

---

Ultrabright chip LEDs
Avnet Abacus Opto-Electronics
Vishay’s range of high-reliability ultrabright chip LEDs feature a tiny footprint with excellent efficiency, and are available in two sizes, SMD 0603 and 0402.

Read more...

---

Efficient industrial LED lighting systems
Radél Opto-Electronics
icotek produces a range of smart lighting solutions for control panels, machinery and server racks, to provide effective lighting in various applications.

Read more...

---

LIDAR filters
Editor's Choice Opto-Electronics
LIDAR filters must be designed with the specific application and sensor type in mind to maximise signal-to-noise ratio.

Read more...

---

New UHF RFID increases picking efficiency
Brady Corporation Opto-Electronics
Brady’s new LED UHF RFID label and reader solution is optimised to increase picking efficiency, as it is now possible to pinpoint the location of assets with greater accuracy.

Read more...

---

Battle germs with UV-C LEDs
CST Electronics Opto-Electronics
LITEON provides compact LED solutions for ultraviolet-C applications that can battle germs and viruses by deactivating the reproduction process of microorganisms.

Read more...

---