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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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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340 views

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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677 views

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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270 views

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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438 views

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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124 views

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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708 views

Power Supply for ESP12F WiFi Module

I am using ESP12F to drive LED array circuit for dimming and other functions. Supply from LED driver is constant current for LED array. What does ESP12F requires? Constant current or Constant voltage? ...
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638 views

Does a power amplifier output constant current or constant voltage?

I am having a confusion with the following a 16W high power amplifier for an RF circuit. Specifically I wonder, does it give me a constant current or a constant voltage as output? and if it does ...
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117 views

Constant power supply with high-voltage “restrike”

I'm still playing with electrolytic chemical reactors. After looking at the results from a constant-current circuit I'm realizing that what I really need is a constant power supply because, depending ...
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Is there a constant power supply?

A voltage source is a device that produces constant voltage, but allows amperage and power to vary, in accordance with the laws of electricity. A current source is a device that produces constant ...