All Questions
Tagged with dc-dc-converter voltage-regulator
165
questions
2
votes
0
answers
109
views
SiC461 regulators unpredictably dying under load
I am having problems with a design using SiC461 regulators.
I attached a snippet of the relevant schematic file. The problem I am facing is that under load (powering an LED strip with peak current of ...
1
vote
1
answer
51
views
Why is there a resistor and capacitor between SW and VOUT on a TPS61322 5 V switching regulator?
The TPS61322 datasheet shows a typical circuit like this:
However, it later shows a "layout example" that differs slightly:
The second picture shows a resistor and capacitor between SW and ...
0
votes
1
answer
101
views
Trade off between output ripple and switching frequency for DC-DC converters
DC-DC converters datasheets generally specify their output ripple and the switching frequency.
From what I understand, the output ripple goes down as the switching frequency goes up.
When using a ...
- 365
0
votes
5
answers
194
views
How to create a voltage divider for different (changing in time) loads?
What I need basically is to create a -12V - 0V - 12V power supply from a 0 - 24V DC supply.
The problem is I can't just make a voltage divider because the loads on each part is changing in time. I ...
2
votes
2
answers
486
views
Step Up Circuit does not work
I am using an IC as a step-Up converter in my PCB.
It is supposedly to increase voltage from 12V to 30V.
This is the chip that i used.
https://datasheet.lcsc.com/lcsc/1809251831_Diodes-Incorporated-...
- 1,369
0
votes
0
answers
48
views
Adding a volt/amp-meter to a buck converter
My buck converter is driving my volt/amp-meters crazy. As a hobby project I am trying to turn this buck converter module into a variable power supply. I am trying to add a voltage and current meter to ...
- 1
0
votes
2
answers
176
views
Minimum and maximum input voltage for boost converter for reliable operation
I'd like to know the minimum and maximum input voltage for a MCP16251/2 boost converter for reliable operation.
Can someone tell me the input voltage range for this boost converter for reliable ...
user220456
0
votes
0
answers
57
views
High ripple in the output
We have chosen the MCP16311 buck converter for 4 V @ 1 A output.
design specifications as below.
Input voltage range: 5 to 20 V (source - USB type C mobile, charging adapter)
Output Voltage : 4 V
...
user220456
10
votes
3
answers
1k
views
Why is the flying capacitor voltage half of the input voltage in a 3-level buck converter?
This and this discuss about the 3-level DC-to-DC converter.
All of these are saying that the flying capacitor voltage is 1/2 VIN. However, I couldn't find any more explanation on this. Probably it's ...
- 1,649
1
vote
1
answer
75
views
Powering multiple components with different power requirements from a rechargeable battery
I'm building a toy for a baby that basically runs an ESP32, 2 class-D amplifiers, an SDCard module and a NeoPixel (a single one..). It has to be battery powered and so far I've found out that it's ...
- 159
1
vote
1
answer
226
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What's the simplest way to produce 150VDC for activating my piezo stack?
I recently bought a piezo stack for research purposes. To activate the piezo stack and get the maximum stroke I have to supply 150VDC.
I want to use the piezo stack in two states only: 0V and 150VDC.
...
- 23
0
votes
2
answers
114
views
In what conditions can a DC isolated power supply generate a higher voltage at the flyback transformer's secondary side?
We have designed a passive PoE isolated power supply using a TOP268 converter.
We are converting 48 V DC PoE input to 12 V/1 A output. This 12 V output we are feeding to a step-down power regulator ...
- 11
1
vote
1
answer
130
views
Is it dangerous to charge gadgets at less than 5 V?
I'm using a solar panel, which gives me unstable current (from 0 to 9 V approximately), then I use a step-up converter to increase te voltage a little (my goal is to keep it between 7 and 12 V in ...
- 13
7
votes
6
answers
3k
views
How can I drop the voltage of a 5V DC power supply from 5.5V to 5.1V?
I have some LED matrix panels (64x64) that appear to be super sensitive to voltage. Higher voltages introduce noise. I have a handful of 5 V, 10 A "brick" power supplies like this one.
The ...
- 145
0
votes
1
answer
1k
views
24V to 5V step down voltage regulator with LM2678 [closed]
Reference: https://www.ti.com/lit/ds/symlink/lm2678.pdf
I have constructed the circuit above attempting to step down the DC voltage from 24V to 5V. But I keep getting 8.3V as the output voltage. It is ...
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