Power Electronics

Power Controls, Supplies, Drives.

5 Watt LED driver with Zetex – Diodes

Apr 192011

LED Drive Solutions and Power Supply Design ideas. Robust and efficient high-brightness LED drivers. Zetex have LED drivers for boost/buck they are cost effective too, Zetex range of LED drivers – Diodes Incorporated Shown below is a design from an Application Note of Zetex. Here ZXSC400 drives a Luxeon V Star LED. The input voltage ranges from 4.2V to 5.4 V with a maximum output current of 700mA at 5V input. ZXSC400 – LED driver boost converter Voltage mode boost converter in the SOT23-6 package. Its low feedback voltage allows the current in a chain of LEDs to be set [Read More ....]

White LED Drive Circuits – Maxim

Power Electronics No Responses »

Apr 182011

Here you can understand how to drive white LED’ s for flashlight or Internal lamp. I have tried substituting for tubelights and bulbs. These LED’s are amazing. The amount of light at even 100mW is phenomenal. The future is indeed LED Lights. But more Amber component is required in LED to give the warm feeling of an Edison Lamp. Why Drive White LEDs with Constant Current? – Maxim The MAX1561/MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single DualMode input provides a simple means of brightness adjustment and on/off control. Fast [Read More ....]

Constant LED Brightness and LDS8711

Power Electronics No Responses »

Apr 122011

The LDS8711 is a fixed frequency current mode boost converter with internal rectifier and cycle-by- cycle switch current limit specifically designed to drive a string of up to 10 White LEDs. Aa Switching Converter Chip with hardly any external components driving a HB LED chain. HB – High Brightness LED. This IC is from IXYS Power Devices. High efficiency boost converter with the input voltage range from 2.7 to 5.5 V . Drives one LED string with 10 LEDs in series up to 32 mA. 250 mV current sense voltage No external Schottky Required 0.7 MHz Switching Frequency Efficiency greater [Read More ....]

Infineon ICL8001G – Bulb Driver

Power Electronics 1 Response »

Apr 112011

The highly efficient dimmable LED driver system utilizing ICL8001G sets a new Benchmark with respect to integration, performance, features and total system cost. ICL8001G employs quasi-resonant operation modes with integrated power factor control for off-line residential LED lighting applications in particular 40W / 60W / 100W incandescent bulb replacements. Infineon ICL8001G – Bulb Driver The EVAL-LED-ICL8001G-Bulb02 demonstrates the single-stage flyback and PFC controller ICL8001G in an LED Bulb application. Its quasiresonant operation mode, primary side control, integrated PFC and phase-cut dimming control makes it the best in class system solution for dimmable LED bulbs. ICL8001G Magnetics at Midcom Midcom manufacture [Read More ....]

Supercap and White LED and Energy Harvesters

Power Electronics 1 Response »

Apr 082011

Supercap and White LED and Energy Harvesters

This is a educative and simple example to help learn about supercaps and white LED. It will also help you understand component behavior. If you are learning electronics, try this one out. The goldcap-Dynamo Lamp idea is a DIY Tutorial by Kainka on Electrical Energy Harvesting. What may be this EH Thing ? Energy harvesting (also known as power harvesting or energy scavenging) is the process by which energy is derived from external sources (e.g., solar power, thermal energy, wind energy, salinity gradients, and kinetic energy), captured, and stored for small, wireless autonomous devices, like those used in wearable electronics [Read More ....]

Low Voltage AC LED Reference Design Board

Design, Power Electronics No Responses »

Apr 072011

Low Voltage AC LED Reference Design Board

ON Semiconductor has application notes on how to harness the LED lighting technology, this enables you to design your LED based products like Flashlight and LED Ballasts for Home/Office Lighting. The long term savings on energy cost not only offsets the Initial Investment on LED Lighting but also cuts your expense on a long term for energy and replacement costs. LED Lighting solutions are very reliable, but is is important to integrate it with high quality engineered power electronics. So a Customer/Consumer has to choose quality tested and standardized products and be very shrewd in purchase decisions. Low Voltage AC [Read More ....]

Interactive Power Electronics Seminar

Power Electronics, Training Consulting No Responses »

Mar 112011

The interactive and animated applets are part of the Introductory Course on Power Electronics taught by Prof. Kolar at the ETH Zurich. Interactive Power Electronics Seminar Power Electronics Circuit Simulation Applets to See – are the simple Buck-converter and the Rotating Three-Dimensional Field More pages of Compulsory Reading for Students Part I – An Overview of AC/AC-Converter Topologies iPES-Circuits – DC/DC converters, thyristor converter, AC/DC inverter. iPES-Circuits+ – Power electronic systems of higher complexity in industry. iPES-Thermal – Dimensioning and operation of power electronic converters iPES-EMFields – Electrostatic, magnetic fields, permeability, inductor design. iPES-AET – Operational Amplifier – Applications. Gecko [Read More ....]

ASSP for Power Supply – Intelligent Power Device

Integrated Circuits, Power Electronics No Responses »

Nov 262010

ASSP for Power Supply - Intelligent Power Device

MIP551 and MIP552 are good devices used in LED-lighting power control. Small size & high efficiency and most important worldwide input voltage (80 VAC to 280 VAC), and has dimmer control too. ASSP for Power Supply – Intelligent Power Device Typical LED peak current – MIP551 : 0.5 A and MIP552 : 1.0A; Over temperature protection for IPD (Auto-restart). Constant current control with simple LED drive circuit. IPD for LED-lighting MIP551/MIP552 MIP551/MIP552 – IPD (Intelligent Power Device) LED Lighting Driver 80 to 280 V – Output Freq is 44 kHz MIP551 – 10 W Output Max MIP552 – 30 W [Read More ....]

Uninterrupted Power Distribution for Homes

Electrical, Power Electronics No Responses »

Jan 142010

The Enhancement of Mains power system for Homes and Small Business is critical. The population is more now and the use of electricity for more appliances becomes inevitable, this makes power shortages imminent. The power to Homes can be distributed by two types of phase lines (live), a common neutral and the usual earth. High Phase is for Heaters and Motors and some lighting too. This phase can be shut down on power failure, load management or over use. The other is the Green Energy line, a low current phase which never fails! It is used only for lighting and [Read More ....]

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