Questions tagged [constant-power]
A circuit designed to supply or consume a constant level of power. Contrast with constant-current and constant-voltage.
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How to control the power draw of my laptop from AC adapter and internal battery [closed]
I plan on connecting my 100 W (20 V at 5 A) power bank to my laptop's power supply port by using a USB C to DC barrel adapter. However, my laptop expects to draw up to 230 watts whereas PD charging ...
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Modeling Constant Power Load with AC Source in LTspice
I'm trying to model a constant power load fed by a single-phase AC source in LTspice. I seem to run into convergence failure when I run transient analysis
What I’m doing:
I’m using a behavioral ...
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Can we replace transformer instead of transistor for some particular cases? [closed]
In a transformer, the alternating current and voltage is transformed in the secondary coil by keeping the power constant.
When we are dealing with AC, suppose that we want to amplify the voltage ...
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Constant Power Loads in LTspice
Could someone help me understand what is happening in B1 when stepping between P = 2.9 W and 3.0 W?
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Calculating voltage and current of constant wattage loads along a very long cable
I am struggling with a calculation where I'm either missing something really simple or the maths is advanced beyond my current capability. I have tried rearranging wattage / ohms law calculations but ...
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Applications for Constant Power Source
Consider a SMPS with a control loop that uses an analog multiplier to control its output voltage in order to maintain a constant power output. I am trying to figure out some of the applications where ...
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Equipment for analyzing large DC distribution system
I'd like obtain the transfer function of a large DC power distribution system. My question is whether there's equipment (like vector network analyzers) designed to
assist with modeling these type of ...
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Need uninterrupted power to car power socket, even during ignition on/off, direct battery tap only option?
I have a carputer setup with a Nexus 7 tablet and a Carlink wireless carplay adapter connected via OTG splitter cable to the tablet. I have a problem in which the carplay dongle needs constant power ...
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Constant power load SPICE model
I would like to create a SPICE model for a constant power load. I'm guessing that would involve using an equation to dynamically adjust the model's resistance based on the applied voltage. How do you ...
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Driving a WS2815 12V LED strip with a CC+CV driver
I am selecting a driver/PSU to power a string of WS2815 12V LEDs.
WS2815 datasheet here:
http://www.world-semi.com/DownLoadFile/138
One option I am looking at to power these strips is the Mean ...
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Why constant current led driver is not used in parallel led strip? [closed]
I know that the constant current led driver is not used in the parallel led strip. and constant voltage led driver is not used in the series led strip.
can anyone explain me with the example that why ...
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Capacitor charging efficiency with a constant power source
It is easy to derive the efficiency for loading a capacitor from a constant voltage or a constant current source, basically because exponential functions and constants are very, well, integration-...
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Voltage drop on string of constant-power loads: Simulation issue?
I've noticed something that seems odd to me in an LTspice simulation (see below).
I'm trying to model a system with a number of identical devices which each draw ~11W (with negligible variation over ...
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Converting appliance LEDs from constant current to constant voltage to allow for dimming
I'm trying to implement dimming control for the lights in my kitchen hob extractor. The lights are 4x LED spotlights which are each 3v 700mA (2.1W). They are currently wired in series to a 700mA 10W ...
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Effects of current/voltage limiting of LEDs
First of all, I have read many articles about the non-linear effects of voltage vs current of LEDs. I also know that current will rise as temperature rises, batteries have resistance, LEDs brightness ...
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