LED driver delivers up to 350 mA from single cell
27 July 2005
Power Electronics / Power Management
Linear Technology's LTC3490 is a synchronous boost DC/DC converter optimised for driving high current white LEDs.
The LTC3490 operates at up to 90% efficiency, maximising battery run time while its input voltage range of 1 V to 3,2 V enables it to deliver up to 350 mA from either a single or dual cell alkaline/NiMH battery. Its output voltage range of 2,8 V to 4 V is fully compliant with the forward voltage requirements of high current LEDs.
The device provides constant current drive for LED applications requiring up to 1 W of power. When its output load is disconnected, it limits the output voltage to 4,7 V, providing enhanced system reliability. Onboard analog dimming capability reduces the LED drive current proportionally to the CTRL-pin voltage. A low-battery logic output signals when the battery voltage has dropped below 1 V.
The LTC3490 comes in 3 x 3 mm DFN or SO-8 package, and with its 1,3 MHz switching frequency offers a very small 1 W solution footprint for portable lighting and rechargeable flashlight applications.
Further reading:
Cutting-edge solutions for Africa’s clean energy future
Power Electronics / Power Management
As Africa pushes towards reliable, affordable, and sustainable energy, Sungrow is driving transformation with cutting-edge innovations that enhance grid stability, reduce energy costs, and expand access to clean power.
Read more...
Transformer protection is a critical safeguard for municipal power stability
Power Electronics / Power Management
Transformer protection is not just a technical requirement; it is a vital component in ensuring the resilience and operational integrity of South Africa’s municipal power infrastructure.
Read more...
Reliable power solution
Conical Technologies
Power Electronics / Power Management
The Mibbo MLD-120W-xxVx is a robust DIN-rail mounted DC-DC converter with a 120 W output capacity specifically designed for industrial and automation applications.
Read more...
Easing the path for IPPs navigating local energy regulations
Power Electronics / Power Management
Independent Power Producers (IPPs) and developers venturing into South Africa’s renewable energy sector face an onerous and challenging regulatory landscape characterised by uncertainty in securing grid connections and considerable development costs.
Read more...
Wide input voltage buck-boost converter
Altron Arrow
Power Electronics / Power Management
The MAX77859 from Analog Devices is a high-efficiency, high-performance buck-boost converter targeted for systems requiring a wide input voltage range of between 2,5 and 22 V.
Read more...
High-density power module for AI at the edge applications
Altron Arrow
Power Electronics / Power Management
The MCPF1412 power module from Microchip has integrated I2C and PMBus interfaces for flexible configuration and monitoring.
Read more...
Development kit for TI’s SN6507
Power Electronics / Power Management
This comprehensive solution is designed to help engineers evaluate the performance of TI’s SN6507 transformer driver for isolated power supplies.
Read more...
High-voltage IGBT
Hi-Q Electronics
Power Electronics / Power Management
Diotec Semiconductor has launched the DIW030M060 IGBT, a 600 V, 30 A device with a built-in reverse diode.
Read more...
DC converter for Hi-Rel applications
Vepac Electronics
Power Electronics / Power Management
The MFK2812S from Crane Aerospace & Electronics is a DC-DC converter with an input voltage range of 16 to 50 V and an output of 12 V at up to 2,08 A.
Read more...
Distributed Energy Resource Management Systems
Schneider Electric South Africa
Power Electronics / Power Management
In addition to grid stability, DERMS also play a role in energy trading with some countries leveraging DERMS for real-time energy trading.
Read more...