Lighting drivers power up to 20 series-connected LEDs
6 September 2006Power Electronics / Power Management
Access Control & Identity Management
National Semiconductor recently introduced two new, highly-integrated lighting management units (LMUs) that include a high-voltage boost converter and programmable constant-current driver to control up to 20 series-connected LEDs in display backlights, and keypad, RGB and camera flash LEDs. The LP3958 and LP5526 LMUs feature tiny micro SMD packages.
The devices can drive from two to five strings of four series-connected LEDs, depending on the lighting application. They are optimised for use in single- or dual-display phones, as well as large display PDA phones. Each features three general-purpose input/outputs (GPIOs) to trigger lighting functions such as flash or to control additional device-enable signals.
The LP3958 features 70 mA of output current and the LP5526 features 150 mA of output current. Both devices include an I²C interface. The LP3958 LMU can drive up to eight white LEDs grouped as four series-connected LEDs per string, with typically one string per display. The LP5526 can drive multidie serial-flash LEDs in camera Flash (up to 3 W of power) and torch applications.
For more information contact Lambert Colyn, Arrow Altech Distribution, +27 (0)11 923 9600, [email protected]
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...Quality batteries are critical for IIoT Uniross Batteries
Power Electronics / Power Management
Batteries intended for use in industrial operations must indeed offer complete reliability under extreme environmental conditions, resistance to vibration and harsh environments.
Read more...Balancing secure access control and fire safety
Editor's Choice Access Control & Identity Management Fire & Safety
In modern building management, few topics create as much tension as the intersection between security access control and fire evacuation safety. Nichola Allen of G2 Fire sheds light on this delicate balance.
Read more...12 kW hybrid inverter
Power Electronics / Power Management
Sungrow recently unveiled its next-generation residential energy storage solution, expanding its power range from 5 kW to 12 kW with the introduction of the new MG12RL hybrid inverter.
Read more...40 W and 75 W railway DC/DC converter Brabek
Power Electronics / Power Management
RECOM has announced two new cost-efficient DC/DC converters for the rail market with an ultra-wide 11:1 input range to cover all nominal input voltages from 24 to 110 V DC.
Read more...Power modules for solid-state transformers RS South Africa
Power Electronics / Power Management
Microchip’s new 3,3 kV silicon carbide modules deliver the required thermal performance and efficiency for SSTs to increase power available for token generation.
Read more...Solving South African power problems with locally built intelligence
Editor's Choice Power Electronics / Power Management
Smart metering infrastructure in South Africa remains patchy. The rollout has been slow, coverage is inconsistent, and for the most part, granular per-unit measurement simply does not exist.
Read more...Wide range power module
Power Electronics / Power Management
The latest DC-DC modules from Würth Elektronik are characterised by high resilience to voltage transients on the 24 V bus and an extremely wide input-voltage range from 3,5 V to 38 V.
Read more...Generating negative voltages from a positive supply Altron Arrow
Editor's Choice Passive Components
It is common for IoT devices, industrial sensors, meters, and medical equipment to require both a positive and negative voltage, and this article explains the options available to produce a negative rail from a positive rail supply.
Read more...Addressing latency and signal integrity challenges Altron Arrow
DSP, Micros & Memory
Strengthening Microchip Technology’s data centre solutions portfolio, its XpressConnect retimers support high-bandwidth architectures, while helping reduce integration complexity.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version