dc power
dc powerA switched-mode power supply, switch mode power supply, or SMPS, is an electronic power supply unit (PSU) that incorporates a switching regulator — an internal control circuit that switches the load current rapidly on and off in order to stabilise the output voltage. Switching regulators are used as replacements for the linear regulators when higher efficiency, smaller size or lighter weight are required. They are, however, more complicated and more expensive, their switching currents can cause noise problems if not carefully suppressed, and simple designs may have a poor power factor. SMPS can also be classified into four types according to the input and output waveforms, as follows. AC in, DC out: rectifier, off-line converterDC in, DC out: voltage converter, or current converter, or DC to DC converterAC in, AC out: frequency changer, cycloconverterDC in, AC out: inverterAC and DC are abbreviations for alternating current and direct current. Switched-mode PSUs in domestic products such as personal computers often have universal inputs, meaning that they can accept power from most mains supplies throughout the world, with rated frequencies from 50 Hz to 60 Hz and voltages from 100 V to 240 V (although a manual voltage "range" switch may be required). In practice they will operate from a much wider frequency range and often from a DC supply as well. Distributor of custom AC/DC and DC/DC power supplies. Home party supplies poker supplies electric fence supplies grooming supplies drywall supplies fence supplies moving supply store home power generator power boat insurance power point projector rental power slot rotor chair jazzy power wheel low power sram power supply atx 250 broadband service providers dsl service providers online payday loan service email hosting service digital photo printing service business answering services cheap dsl internet service digital picture printing service affordable email marketing services adult free online dating service best hosting service web money transfer services dating on line service dating services california limousine service in los angeles national answering service hard disk data recovery services los angeles car service christian dating free services cable dsl internet service discount internet service providers customer service training seminar canadian web hosting services delaware incorporation services quality web site hosting service quality web site hosting services top internet service provider disaster recovery service serviced office in london |