Power Electronics

Power Controls, Supplies, Drives.

 

Lazar’s power electronics corner, smps switching power supply design, circuits, schematics, pcbs, electrical engineering reference, software, and other free web resources.

Switching Power Supply Design – smps.us

SMPS design, Tutorial, PCB design, Generators, Computer PSU, UPS, Magnetics, EE Reference, Inverters, Thermal
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Solar Energy Uses in Homes: Solar Guide

“When electromagnetic waves strike an object they can cause various effects, such as excitation of the molecules, excitation and ejection of electrons, and oscillation of charge carriers in the object. As the result, a portion of the radiated photons can convert to heat, electricity or chemical energy”

Solar Grid-Intertie Inverter

Solar Grid-Intertie Inverter

An inverter is basically an electronic device that takes a DC input voltage and converts it to an AC output voltage. My design takes a 12V DC input from my solar panels (two 50w panels in parallel) and converts it 120V AC at 60Hz which is the power that most home appliances use. A grid-intertie inverter connects up to and external AC power system and matches it’s internal AC sinewave to the external AC sinewave to allow the inverter to feed power into the external system.

 

Flextek Electronics located at Carlsbad-CA have created a design that helps a design engineer understand the intricacies of digital supply design using a Micrcontroller. – delabs

8-Buck Converter Design Kit enables customer to build, program, test, and analyze a Buck converter controlled by 8-bit PIC Micro. Highly integrated components execute control functions through firmware algorithms that are converted to analog circuits for analysis and intuitive understanding

. Learn Digital Power - Hands-On Example

The 80W converter has 12V input with output adjustable from 1V to 11V on a through-hole PCB measuring 3.6″ x 1.5″. Key performance parameters include 92% efficiency and 12mVrms ripple at 156KHz switching frequency.

Flextek Electronics

“Flextek Electronics has extensive expertise in electronic controls, closed-loop control systems, embedded real-time controllers, analog circuits and power management, as well as software development.”

 
MAX1561 - 26V Step-Up Converters - Maxim IC

The MAX1561 and 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. MAX1561 – 26V Step-Up Converters – Maxim IC “High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs” Fast 1MHz (500kHz for the MAX1599) current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup. Some Features – Accurate Current Regulation for Uniform Illumination High Efficiency Up to [Read More ....]

 

Who would know better about Radio Frequency Interference and ElectroMagnetic Interference more than the Hams or Amateur Radio Community. If they have to communicate effectively using limited resources, they have to deal with EMI/RFI effectively, While they build their equipment or combat Noise from other Machines and Installations nearby. This problem needs more practical involvement and experimentation to learn, compared to learning something like Digital Electronics. Equipment and Electricals like SMPS, AC/DC Drives, Motors, Solenoids and CFL Lamps are to be built/reinforced for low EMI/RFI emission/radiation. Sensitive Medical Equipment like ECG or even a Aircraft can be seriously affected by [Read More ....]

 

One chip that takes care of all Power requirements in a Portable Electronic Gadget. Power Management Multi-Channel IC (PMIC) Solutions – PMIC Solutions with and without Battery Charger. TPS65070 Handheld Gadget Power Chip A battery charger for single Li-Ion or Li-Polymer cell. The voltages needed for an embedded system. Includes PWM mode using I2C. wLED Boost Converter, Touch Screen Interface. 10 Bit A/D Converter too. Charger/Power Path Management: 2A Output Current on the Power Path Linear Charger; 1.5A Maximum Charge I Limit – 100mA/500mA/ 800mA/1300mA Thermal Regulation, Safety Timers Temperature Sense Input Battery charging, gauging and protection “As different battery [Read More ....]

 
MAX1910 White LED Charge Pumps - Maxim IC

Drives LEDs with a regulated output voltage or current (up to 120mA) from an unregulated input supply (2.7V to 5.3V). These are complete DC-DC converters requiring only four small ceramic capacitors and no inductors. 200mV Current-Sense Threshold Reduces Power Loss. MAX1910 White LED Charge Pumps – Maxim IC 1.5x/2x High-Efficiency White LED Charge Pumps Some Features High-Efficiency 1.5x/2x Charge Pumps Low Input Ripple with 750kHz Operation Up to 120mA Output Current 1µA Shutdown Current Read More Here – White LED Drive Maxim at EEM

 
LT1510 - CC CV Battery Charger

A Circuit for charging NiCd, NiMH and Lithium-Ion Batteries.PWM 500kHz with Soft Start and Shutdown Control. Linear Technology – LT1510 – CV CC Battery Charger Some things to know in battery charging. A battery that has drained will almost appear like a short circuit to the charger. A battery is never fully drained, if you want a nice battery life. Overcharging a battery can damage it and is not safe too. We have to charge it with an optimum current, upto a Top up charge voltage only. Then a trickle to compensate for internal leakage on no-load. Float charging and [Read More ....]

 
Solar Cell Voltage Booster with MAX856

This circuit generates an usable power 5V good for charging portables. Even lighting a White LED Array. A Supercap Flywheel may be good addition to this, these kind of chips can also add supercap power management, as it will take a lot of current to charge up. This will keep power flowing when the sun goes behind the clouds. Harnessing Solar Power with Smart Power-Conversion Techniques “Obtaining all the available energy from a solar panel requires a switch-mode step-up or -down converter and battery charger, in addition to the battery. The converter must ensure that every bit of energy taken [Read More ....]

 
Surge Protection and Lightning Arrestors

Supplementary to EMI/RFI/EMC Immunity of an Equipment. Many Installations are subject to Highly Disruptive Electrical Environment not just EMI. Depending on the budget and the situation a solution has to be found. Sometimes a CVT or an Isolation Transformer can do a lot of good. Converting all Energy inputs to battery energy and having a Isolated Synthetic Sine Supply may be an expensive but good solution. Either way the devices that face the harsh environment have to be over rated along with these protections. Siemens Residential Surge Protection Abstract-This study examines the design and construction of AC Electronics load surge [Read More ....]

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