Questions tagged [dc-dc-converter]
DC-DC conversion. Implies conversion of a DC voltage level up or down. DC-DC converter can be isolated or non-isolated. Electronically it can be done by many kinds of circuits, depending upon the application (charge pumps, voltage multipliers, linear voltage regulators, boost/buck switched converters, etc)
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Regulated 3.3V from a Lithium-ion (or LiPo) battery
Background
I wish to power my circuit with a Lithium-ion or LiPo battery (likely a battery with around 1000 mAh capacity). These batteries have a voltage that goes from 4.2V to 2.7V typically during ...
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Reducing voltage with resistors
I have been looking around for an easy way to convert 12V to 5V. I have seen some people saying that a simple resistor is all that is needed.
$$ Volts = Ohms \cdot Amps $$
$$ Amps = \frac{Volts}{...
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What is causing large oscillations in my DC/DC boost converter? Is this ground bounce or some other effect?
I designed my first PCB for a DC-DC boost converter only to find that it produced very noisy output. The design is based around the MIC2253.
Here's a schematic:
Although my circuit allows for ...
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Least expensive way to boost DC voltage
What would be the least expensive way to boost a DC voltage?
The aim is to convert 1.2 V/1.5 V (from an AA/AAA cell) to 3.3 V to power a small 8-bit microprocessor, like Atmel ...
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Why do smaller loads require larger inductors in buck regulators?
The MC34063 Application Note lists the equation for calculating minimum inductor size as follows:
$$L_{min} = \frac{V_{in} - V_{sat} - V_{out}}{I_{pk}(switch)} t_{on}$$
But this implies that as Ipk(...
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Should I isolate grounds of an isolated DC/DC converter?
If I use an isolated DC/DC converter, when designing the PCB, should I isolate the ground of the input and the ground of the output as shown below?
I've never isolated grounds (except for AGND and ...
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What do the "optional" resistor and capacitor do in this circuit?
I'm designing a circuit that includes a boost converter with a few mysterious "optional" components and I'm trying to decide whether or not to include them. Does anyone know what they do? At first I ...
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Is this negative regulator really meant to be an inverted positive regulator?
Project: make a power supply that can replace the 240V AC supply shown, so that I don't die when messing with the board that this connects to.
I'm only interested in the part inside the yellow box; ...
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Full-bridge converter rectifier kicks
I'm in the process of building an 8kW isolated DC/DC converter, full-bridge topology.
I'm seeing some interesting phenomena on the diodes. When each diode becomes reverse-biased, a voltage spike ...
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Isolated DC/DC Converter - Purpose of Capactor connecting two GNDs?
I've been looking at board mount isolated DC/DC converters to use in an application. I found this rather reasonably priced for my needs. Here is what I'm confused about, what is C103 doing here? Isn't ...
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Low side N-Mosfet buck converter
I often see schematics of basic buck converters. The majority of these schematics use a P-MOSFET as high side switch.
Why is this design preferred over a low side, N-MOSFET buck converter?
simulate ...
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How to create a regulated 5V power supply from an unregulated 5V power supply
I have a project that involves a specific single board computer* and several hundred WS2812B "smart" RGB LEDs*, all running from a 5V supply.
I have a 5 volt 15 amp unregulated power supply. While ...
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Can a charge-pump be 100% efficient, given ideal components?
A recent question about cyclically charging a capacitor reminded me of something I read once. As I remember, it demonstrated that it's impossible to construct a charge pump that is 100% efficient with ...
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What is a point-of-load converter?
Can you please give me a definition, or at least a more specific context, of the term "point-of-load" converter/regulator? I have seen around explanations on related products or applications but no ...
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DC DC Converters in Parallel for double current
I am using a 15V 7A DC DC converter for powering a robot. I am looking for a 15V 20A supply. For this can I put three of those regulators in parallel and expect them to provide about 20A of current? ...
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