High-voltage LED driver
2 April 2014
Opto-Electronics
The HV9805 LED driver IC from Supertex is made for applications where the LED light source is arranged as a high-voltage LED string in order to accommodate certain lamp form factors, while allowing for cost savings through less complicated cooling and optical arrangements.
The driver includes a linear post regulator to provide a pure DC current drive for flicker-free light output. The linear post regulator also provides protection from line voltage transients. The HV9805 supports a simple and low-cost driver circuit, which combines a PFC boost stage and a linear post regulator for regulating the LED current to a DC value.
The boost stage employs the boundary conduction mode, with the output regulated for lowest overhead voltage at the linear regulator. The headroom voltage can be freely selected to optimise the efficiency of the post regulator or to minimise the cost or size of the bus capacitor.
The boost converter employs a cascode switch for high-speed switching and convenient generation of the housekeeping (VDD) supply. The low-voltage device of the cascode switch is integral to the HV9805 and is rated at a current of 1 A. VDD power is derived with high efficiency and without the need for extra components or magnetic windings.
Further reading:
Compact direct Time-of-Flight 3D LiDAR module
Altron Arrow
Opto-Electronics Electronics Technology AI & ML
The VL53L9 from STMicroelectronics is the first direct Time-of-Flight (dToF) 3D LiDAR all-in-one module in ST’s portfolio, offering a resolution of 2,3K zones, wide field of view, on-chip processing, 100 frames per second, and sensing range from 5 centimeters to 9 meters.
Read more...
Easy to integrate, quick to react
Opto-Electronics
Würth Elektronik has expanded its range of WL-ICLEDs – RGB-LEDs with integrated controller – to include dual-wire ICLEDs.
Read more...
Industrial time-of-flight proximity sensor
EBV Electrolink
Opto-Electronics
STMicroelectronics’ VL53L4ED is a compact, high accuracy time-of-flight proximity sensor designed for industrial and embedded applications that require precise short range distance measurement.
Read more...
Flexible enclosure lighting solutions
IOT Electronics
Opto-Electronics
Phoenix Contact’s range of enclosure lights is designed to provide uniform illumination throughout control cabinets, while offering flexible installation and energy-efficient operation.
Read more...
Industry’s smallest laser firing system IC
Opto-Electronics
Silanna Semiconductor recently announced that its FirePower laser firing system ICs for smaller, more efficient LiDAR and rangefinder applications are available in production quantities.
Read more...
More light, greater efficiency, better growth
Würth Elektronik eiSos
Opto-Electronics
Würth Elektronik has expanded its WL-SMDC Horticulture product line with new LEDs with wavelengths of 450, 660, and 730 nm in the 3535 package.
Read more...
Intelligent control boosts tunnel safety
IOT Electronics
Opto-Electronics
Intelligent tunnel lighting systems are helping operators by delivering adaptive illumination that enhances both safety and energy efficiency.
Read more...
Case Study: Turning data into insight
Hamamatsu Photonics UK
Editor's Choice Opto-Electronics
Hamamatsu Photonics’ InGaAs PIN photodiode detector has proven consistent, reliable, and robust for more than a decade, helping Axetris to deliver stable, repeatable measurements.
Read more...
Reliable imaging for industrial applications
Vepac Electronics
Opto-Electronics
Combining a high-performance camera with an integrated high-speed processor, these compact systems enable advanced image sensing directly at the device level.
Read more...
Panasonic Industry launches its first flat lens, high-performing PIR sensor
Opto-Electronics
Panasonic Industry has announced the launch of its latest innovation in PIR motion sensors: the Flat Wide Detection Type (12 lens), being the first product incorporating its new PaPIRs+ technology.
Read more...
printer friendly version