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)
2,685
questions
1
vote
3
answers
106
views
Kapton instead of air gap (ferrite core)
I'm working on a flyback converter topology and I want to create a 1 mm air gap in the ferrite core transformer in order to decrease AL. I didn't find one with air gape, I heard of a solution that is ...
0
votes
0
answers
48
views
Multiple output DCDC flyback
I am struggling to come up with a viable design with a minimal BOM for a low power DCDC converter and would appreciate some thoughts.
The input is 24v/48v (PoE PD) with multiple output rails: 12v, 5v ,...
- 153
0
votes
1
answer
27
views
6V 3W solar panel and to charge phone through a DC converter XL6009E1 via a 12V 2A car charger [closed]
I have a 6V 3W solar panel and want to charge phone with it, i have tried a dc converter XL6009E1 via a 12V 2A car charger it shows charging but battery power did not increase
I am scared of using the ...
3
votes
1
answer
211
views
Boost converter does not work according to the theories
I am still a beginner in this field so I would like to gain some insight about boost converters. I wanted to build a boost converter for a school project with this simple design. The parts were ...
- 33
1
vote
1
answer
34
views
How do the switches and level translator work in the LMC7660 Switched Capacitor Voltage Converter [closed]
This is the block diagram of Texas Instruments LMC7660:
Here 4 switches are used S1 to S4. The diagram shows source connection of only two transistors S1 and S2, and leaves out the S3 and S4 switch. ...
3
votes
1
answer
66
views
A question of control of flyback converters
Considering control of flyback converters, is it possible to control a converter which has pure current load (configuration on the picture)? Does it have to always be purely resistive load, because I'...
1
vote
1
answer
87
views
What conditions create subharmonic oscillations in switching converters?
I have been thinking that any time you're in CCM with a duty cycle greater than 50%, you can enter subharmonic oscillations. Is this only for current mode control, or is it voltage mode as well?
0
votes
0
answers
34
views
Anomalous behaviour of a DC-DC booster with LT3461A
I am building a circuit based of the CosmicWatch project, however I had to rebuild the circuit as I'd wished it to be integrated with other systems.
However, powering up the circuit (4.5Vin) instead ...
0
votes
1
answer
56
views
Calculate Li-ion discharge time for two different loads, one after the other
Battery: 2S (2 cell), 7.4 V nominal, 3000 mAh, and 8C max.
CC LED driver: TPS92691
LED string 1 (in series):
I(f) = 1.5 A CC @ V(f) 17 V
As simulated through WEBENCH, the input current required at ...
- 407
0
votes
1
answer
55
views
LTspice AC/DC converter with DC/DC boost converter
So this is my first time using LTspice and I need to convert my (AC) Vin 11.5V to DC and then boost DC voltage to Vout 22.5V. I have a few givens and some I needed to calculate. I am struggling to ...
0
votes
1
answer
52
views
Circuit design for adjusting the electrical load of a small wind turbine (MPPT)
I am trying to make an MPPT controller for a small homemade wind turbine. The goal of the project is the MPPT itself and its performance. The application is direct water heating, and there are no ...
- 21
0
votes
0
answers
58
views
How to choose Duty Cycle value for a Full-Bridge DC/DC Converter
I've noticed that while designing DC/DC converters, some sources (at the bottom of the website, comment of Benjamin Lough) suggest a "rule of thumb" duty cycle of 70%, while others (This is ...
2
votes
0
answers
95
views
Constant current feedback op-amp analysis
Above is the schematic for the convoy XHP35 flashlight driver. As you can see, the current control loop uses the op-amp as a comparator between a setpoint (low-pass filtered PWM output from a ...
- 407
10
votes
1
answer
553
views
Help is needed with IC identification
I have a gateway laptop model P5SW0 which I got in none working condition. Taking measurement, some capacitor was identified to be shorted. Upon removal of the capacitor the short disappear, and ...
- 323
1
vote
1
answer
62
views
Voltage drops when trying to get high current from boost converter
I have designed a Boost converter which boost 5V input to 12V output. I designed it using TPS61378 boost converter IC by Texas instruments. I was able to get around 450mA current from the output ...
- 49