Electrical Engineering Stack Exchange
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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)

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).

More information on the many possible means of DC-DC conversion can be found on this Wikipedia article on DC-DC converters

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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 real definition. Most important for me is, why do…
LeonidasT
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Designing 12V -> 0.1V 100-500A DCDC

I need to build 0.1V@100-500A power supply - and I wonder what's the best way to approach this task? I guess here are not much specific IC's suitable for such DCDC... Should be current-stabilized, 10% ripple is ok, no requirements on switching…
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Forcing a Buck Converter IC to behave like a Boost Converter

I recently thought of a way to force the LM2596-ADJ buck converter IC to behave like a boost converter, just as a fun experiment. Let me explain the idea (I would like to get your opinions before I actually build it.) This is the schematic block…
Prathik Prashanth
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How do I determine DC-DC converter start-up rise time to meet a microcontroller power rising slope spec?

Below, I have waveforms showing power-up on the 3.3 V rail of two otherwise-identical microcontroller boards, the only difference being two different 3.3 V DC-DC switching regulators. In the blue, the V7803-1000 and in the yellow, the VX7803-1000.…
Matt S
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DC-DC booster fails with lead-acid battery source

I have a nominal 10A DC-DC booster PCB with both Voltage/Ampere adjustment. It is intended for charging a 5C LiPo and is adjusted to output 17.5V and 5A for charging. It works very well when powered with a 12V/20A switch-mode supply. But when…
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1.5V to 5V dc-dc converter

I'm looking for a dc-dc converter using only basic components (coil, condensator capacitor, transistor, resistor, diode, zener diode). Because when ordering a specialized component from the internet it usually takes 1 month to ship. My electronics…
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What is the purpose of these 1 ohm resistors in this DC/DC converter schematic?

This schematic is from the LT3467 datasheet. I'm hoping someone can help me understand the purpose of the 1 ohm R3 and R4 resistors. My concern is that they'd need to have very high power ratings as it seems there would be a ton of current running…
birdman
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What is a DC DC controller?

I have heard about DC DC converters and I understand what they are but what is a DC DC controller? What is the difference between the two? Like this LM5085, I cannot understand the major difference between the converter and controller. Hoping for an…
alexhilton
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DC - High Voltage DC converter that acts like a sink

Anyone knows of any DC DC converter that can produce at least 200V and act as a sink? If it is comes in DIP package, its better. Right now I am using EMCOs DC-DC converter. But it cannot really act as a sink. Datasheet here:…
Ender Wiggins
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Level-shifter messing with other voltage rails

I have a problem that may lead to deeper problems very soon. I have a board with two isolated DC-DC regulators (for 3V3 and 5V): The outputs share a common ground, as seen. Both regulators have an LED on their respective output rails. As I am…
Shreyas
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DC-DC Converter Unusally Low Load Capability

I've been working on trying to get this SMPS to work for a while. I'm using an LTC1872, a step up DC controller with current limiting. The circuit used is the typical application provided in the datasheet: With a couple of slight differences (since…
Alex Freeman
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How is the switch current related to output current in a DC-DC converter?

I have designed and implemented a DC-DC converter with the following specs: Input Voltage: 5V Input Current (max): 3A Output Voltage: 12V Output Current (max): 1A DC-DC Controller: MC34063 Inductor: 15uH/5A max Schottkey diode, 550mV Vf 1A…
tgun926
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dc-dc converter does not match the spec

I am trying to use a cheap DC-DC boost converter I got from ebay. I need about 300 mA at 3.3 V. The ebay spec is: Input voltage 0.8 ~ 3.3 V, output 3.3 V Maximum output current: 500 mA Start Voltage 0.8 V, Output Current 10 mA INPUT 1-1.5 V, OUTPUT…
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Why are half-bridge circuits called synchronous rectifiers?

Why are half bridge circuits (2 MOSFETs in a buck converter for example) often referred to as synchronous rectifiers? I understand they are called synchronous because the two FETs have to be driven in sync to avoid shoot-through. But why…
jaurunjljgrtutkwcy
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How to fully shutdown a boost converter?

I've been working on a boost converter based on an LM2733-Y integrated circuit, as follows: My question is, how to shut it down completely? If the SHDN pin is in low state, I get the input voltage on the output. I want to add a switch between a…
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