Triple-output driver for tricolour LEDs

19 September 2007 Opto-Electronics

Specifically designed to drive tricolour RGB (red, green, blue) LEDs for fun lighting or enhanced LCD backlighting in portable applications such as cellphones and MP3 players, the new NCP5623 from ON Semiconductor is a high efficiency triple-output LED driver with I²C interface and built-in gradual dimming.

The NCP5623 performs autonomous operations upon the command of the processor via its I²C interface. Its three independently controlled current outputs - with ±0,5% typical matching tolerance and 32 current levels - allow the display of more than 32 000 colours with a tricolour RGB LED. The device's integrated gradual dimming feature progressively increases or decreases output current to produce a theatrical fade-in/fade-out effect. The use of a logarithmic current profile ensures the light and colour changes appear smooth and linear to human eyes.

To help maximise battery life in portable applications, the NCP5623 achieves 94% peak efficiency with less than 1 μA standby current over the operating range of a lithium-based battery. Despite the small IC package (2 x 2 x 0,55 mm LLGA-12), the device requires only four passive components to operate in a typical application. It also features short-circuit and over-voltage protection, which protects the system in case of LED failure.

Further reading:

Africa’s future internet could be on overland submarine cables
Opto-Electronics
SEACOM aims to explore an innovative new concept: utilising submarine cable technology to address the longstanding challenges in Africa’s terrestrial infrastructure.

Read more...

---

Versatile range of camera modules
EBV Electrolink Opto-Electronics
The CAM-66GY pro-modules from ST are a full range of sample camera modules made for a seamless evaluation and integration of the VD66GY 1,5-megapixel colour image sensor.

Read more...

---

Enhanced breaker status and communication module
Schneider Electric South Africa Opto-Electronics
Schneider Electric has announced the launch of its new Breaker Status and Communication Module (BSCM) Modbus SL/ULP, which delivers enhanced performance, improved connectivity, and simplified integration for power distribution systems.

Read more...

---

Heat-resistant LEDs
Opto-Electronics
Würth Elektronik’s new RGB LEDs are characterised by excellent heat resistance with an insensitivity to temperatures from -40 to 100°C making them ideal solutions for reliable, colour-variable lighting in applications at high operating temperatures.

Read more...

---

PhotoMOS relays
Future Electronics Opto-Electronics
The AQY221R2SX and AQY221R2S PhotoMOS from Panasonic Industry ensures excellent characteristics and high-speed switching performance.

Read more...

---

Mouser now shipping onsemi’s image sensors
TRX Electronics Opto-Electronics
The AR0145CS is a 1/4,3-inch CMOS digital image sensor with a 1280 (H) x 800 (V) active-pixel array that can capture both continuous video and single frames.

Read more...

---

Adaptive optics’ power solution
Altron Arrow Opto-Electronics
Vicor power-dense adaptive optical modules enable colossal telescopes to look into the past for deep space discoveries.

Read more...

---

Ultra-high speed photo detection
Opto-Electronics
TDK Corporation has announced a photo-spintronic conversion element combining optical, electronic, and magnetic elements that can respond at an ultra-high speed of 20 picoseconds.

Read more...

---

High-speed lasers
RFiber Solutions Opto-Electronics
Macom are a high-volume manufacturer of lasers, deploying more than 100 million devices with a reliability of less than 50 FIT and greater than 100 years of wear-out lifetime

Read more...

---

High-performance optical interconnect
Opto-Electronics
STMicroelectronics has unveiled its next generation of proprietary technologies for higher-performing optical interconnect in datacentres and AI clusters.

Read more...

---