All Questions
52
questions
1
vote
0
answers
164
views
1V Overshoot and Undershoot on Power Rails of LTE Module
I have designed a PCB (four layer) having SIM7600I LTE Module. The Stackup is:
Signal & Component Layer with Ground Pour
Internal Ground Power Plane
Internal ...
- 962
1
vote
1
answer
438
views
Input and output oapacitor for PoE + DCDC controller
I am trying to design a PoE solution using MP8007. It has an integrated PD interface and isolated/non-isolated DC-DC Converter.
The DC-DC converter uses fixed peak current and variable frequency ...
- 962
3
votes
1
answer
322
views
What might this term (\$N_C\$) be, calculating ripple current for a buck converter output capacitor?
I'm reading through the datasheet for TI's TPS54302 step-down converter, and determining values for support components.
There is a calculation to determine ripple current for the output capacitor ...
- 34.4k
0
votes
1
answer
2k
views
How to choose a output cap for a 5v buck converter
I am designing a 5v buck converter as a side project, what kind of output capacitor should I choose?
- 413
1
vote
1
answer
735
views
Boost Capacitor of Step-down converter
I'm working on the LT8607 Step-down converter to convert from 12V to 5V/500mA output.
The circuit schematic is as below.
What is the purpose of using the BST capacitor as shown in the schematic.
0
votes
1
answer
494
views
How to increase current output of capacitor bank with buck booster?
I'm pretty novice when it comes to electronics given that my background is in mechanical engineering. But I am trying to design a circuit that can take a 5V (almost 0A current) to charge a capacitor ...
- 11
2
votes
3
answers
3k
views
Why is my buck converter emitting smoke and fire?
I am powering my router from a 24 V battery, but the power requirement of router is 12 V/1 A, so I am using an LM2596 buck converter.
The specification for this buck converter is as follows:
Input ...
- 123
1
vote
1
answer
1k
views
DC-DC converter in "parallel"
I'm designing a system that needs two converters. The Vin input voltage is approximately 14.5V. I need to lower the Vin voltage to 12V and also to 5V. I chose two LM2576-5 (5V) and LM2596-12 (12V) ...
- 583
1
vote
0
answers
121
views
Estimating actual capacitance for aluminum electrolytic capacitor in buffer application
Application:
In a capacitor power buffer application it is preferable to have higher voltage over the capacitors to increase the energy density, as the energy E in a capacitor is given by $$E = \frac{...
- 81
1
vote
0
answers
171
views
What will be the output ripple current per capacitor buck regulator?
I have a existing buck regulator design. Converter part number: TPS54340Q1.
Input voltage = 5 V.
Output voltage = 3.3 V
RMS ripple current is calculated as = 108 mA. (Don't worry too much about ...
- 897
0
votes
1
answer
116
views
Output capacitance in analysis of Buck Converter
In an analysis of buck converter, we make few assumptions.
Those are:
The circuit is operating in steady state.
The inductor current is continuous.
The capacitor is very large and the output voltage ...
- 53
1
vote
1
answer
248
views
Capacitor Selection for TPS56221 [closed]
I'm using the TPS56221 buck converter.
500 kHz switching frequency
12V in 5V out,
16A max, 14A load step
I've found out all the values I need, the problem I'm having is finding suitable capacitors....
- 1,197
2
votes
3
answers
831
views
Self-resonance frequency of MLCC in Buck converter circuit
Let´s assume I use a synchronous buck converter switching at 1MHz and a 47µF MLCC at its output whose self-resonance frequency is right at 1MHz.
For my understanding, using an DC/DC converter output ...
- 1,041
1
vote
1
answer
165
views
Capacitor between boost and sw pin
I want to use THis buck regulator and i was wondring what is the function of the capacitor between the Boost and the SW pin ?
And What happen if i choose to not add this capacitor ?
- 325
3
votes
1
answer
719
views
Is it useful to think of SMPS input capacitance as part of an LC filter?
I'm at the stage of learning about switched-mode power supplies that I'm focused on understanding the role of input capacitance. Just for background, I'm working with a buck topology for this ...
- 7,172