Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around power electronics. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com Designing 600 watts synchronous buck – I want to design the synchronous buck with LTC3858-1 with the below specifications Vin=13 volts to […]
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Parasitic capacitance, inductance, and displacement current
When two electrical conductors are physically close, carry a charge, and there’s a voltage potential between them, they create a virtual capacitor between them, even if the conductors are insulated. The virtual capacitor between them is known as parasitic or stray capacitance. This can happen anywhere but is most troublesome between traces on printed circuit […]
Load lines, Part 2: The DC load line and AC operation
In Part 1 of this FAQ, we looked at the basic DC load line for a simple, basic common-emitter transistor configuration. Part 2 looks at how this graph is used to maintain the linear AC performance of the amplifier configuration. Note that the term “quiescent mode” or “quiescent state” is also used with ICs and […]
Why the industrial IoT needs industrial lithium batteries
Advanced lithium battery technology delivers long-life power and high pulses to expand remote wireless connectivity throughout the Industrial Internet of Things. Sol Jacobs | Tadiran Batteries The Industrial Internet of Things (IIoT) is largely influenced by advanced wireless devices and sensors. To a large extent, the rapid expansion of industrial connectivity is being driven by […]
Halt and catch fire: The perils of cheap PoE
Dave Jeskey tells an interesting story about what happened when an LED lighting company operated a few of its products in a test chamber. The RJ45 plugs, used for making a connection to a Power over Ethernet cable, melted. The RJ45 plugs came from Sentinel Connector Systems where Jeskey is director of sales and marketing. […]
Power-saving DC solenoid driver provides initial full power actuation followed by PWM hold
by crutschow, Electro-Tech-Online community member To save power and reduce temperature rise, a solenoid or relay coil can be initially energized with full power to rapidly complete the solenoid stroke, and then reduce its voltage (current) to just what’s required to maintain the solenoid position. Often the voltage can be lowered to 35-50% of the nominal […]
Load lines, Part 1: The basic transistor DC load line
There are concepts and terms in basic analog circuits which may not be familiar to designers who work primarily with digital circuits. Yet digital circuits are really specialized versions of analog ones, so these “old” analog principles play a large although somewhat invisible role. Part 1 of this FAQ discusses DC load-line basics, while Part […]
Why isolated digital inputs are replacing optocouplers in up to 300V systems
by Anant Kamath, Texas Instruments Isolation is a means of preventing DC and unwanted AC currents between two parts of a system while allowing signal and power transfer between those two parts. Isolated voltage detection is used in many industrial applications, including protection relays, power station automation, high-voltage battery management, telecom power supplies, home automation, […]
Power Electronics Top Talks in March on EDABoard.com forums
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around power electronics. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com Ground problem cause SPI to fail – I have designed a power electronic inverter. The DC link is supplied by single phase […]
A low-dropout CC/CV 12V lead-acid battery charger with auto trickle-charge
by Crutschow, Electro-Tech-Online community member For the best charging of lead-acid batteries a three-step technique is often used, consisting of an initial constant-current charge, then a high constant-voltage top-off, and finally a lower constant voltage trickle-charge. But a simpler two-step technique can also work fairly well, which is to start with a constant-current until the […]