Inductorless high current LED charge pump is 90% efficient
18 May 2005
Power Electronics / Power Management
Linear Technology's LTC3215, a fractional charge pump, high current white LED driver IC in a 3 x 3 mm 10-lead DFN package, can deliver up to 700 mA of LED current. Its high efficiency multimode architecture automatically switches between 1x, 1,5x or 2x boost modes by monitoring the voltage across the LED current source and switching modes only when ILED dropout is detected. This enables the LTC3215 to maximise efficiency (up to 92%) throughout the entire Li-Ion operating range.
A 900 kHz switching frequency and a low external parts count (two flying capacitors, two programming resistors and two bypass capacitors at VIN and CPO) provide a very tiny footprint and cost-effective solution, says the manufacturer, and this is ideally suited for video and flash applications in camera phones and other portable lighting applications.
The IC employs built-in soft-start circuitry which prevents excessive start-up inrush current. An ultralow dropout current source maintains accurate LED current as the input voltage approaches the LED forward voltage.
For more information contact Memec SA, +27 (0)21 4103.
Further reading:
3-terminal filters for automotive applications
RS South Africa
Power Electronics / Power Management
TDK has expanded its YFF series of 3-terminal filters for automotive applications to include higher voltages up to 35 V and higher capacitances up to 4,7 µF.
Read more...
Simple battery charger ICs for any chemistry
Altron Arrow
Editor's Choice Power Electronics / Power Management
The LTC4162 is a highly integrated, high voltage multi-chemistry synchronous monolithic step-down battery charger and PowerPath manager with onboard telemetry functions and optional maximum power point tracking.
Read more...
Why your PoE budget could make or break your next installation
Power Electronics / Power Management
In South Africa’s often unpredictable networking environments, understanding and planning your PoE budget is essential for system reliability, customer satisfaction, and long-term scalability.
Read more...
Five-minute EV charging a reality
Power Electronics / Power Management
Successfully demonstrated in Beijing recently at the Shanghai auto show, BYD claimed to add 400 km of range in just five minutes of charging.
Read more...
The evolution of power management in electronics
TRX Electronics
Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.
Read more...
Power and precision in a compact package
Conical Technologies
Power Electronics / Power Management
The Mibbo MPS Series metal-encased power supplies deliver solid, efficient power in a durable package that’s built to last.
Read more...
Robust PoE module
CST Electronics
Power Electronics / Power Management
The Ag59800-LPB high power, IEEE 802.3bt compliant, PD module from Silvertel offers typical efficiency of 95% making it an ideal choice for higher power, space-constrained applications.
Read more...
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...
printer friendly version