All Questions
Tagged with buck-boost inductor
18
questions
2
votes
3
answers
262
views
Why inductor don't discharge completely even when the duty cycle is 50%?
1] My simple buck convertor circuit description
I made this buck convertor on my breadboard- Falstad simulation
The battery voltage is 12 V
And the MOSFET is a N-channel enhancement mode MOSFET
The ...
- 45
3
votes
6
answers
1k
views
What is an intuitive explanation on how a buck and boost converter transfer energy?
I can understand how a buck converter can step down the voltage but only with the formulas. I am struggling to understand intuitively how the inductor stores energy and releases it in a way so that ...
- 31
0
votes
2
answers
151
views
Why is the output voltage (without capacitor) of a boost converter seen as a perfect square wave?
I am trying to learn about boost converters, but I don't understand why the images of the voltage output always seems to be like a square wave PWM. I understand that assuming perfect inductors, the ...
- 667
0
votes
2
answers
472
views
Find inductor for XL6019 circuit boost converter
I need a way on my PCB to step up 5V to 12V (with currents up to 2A). I've been looking at the XL6019 IC and tried to copy the design from the sample circuit of the datasheet:
I'm currently stuck at ...
- 91
2
votes
2
answers
816
views
Why is my boost converter output lower than expected?
I have simulated this boost converter circuit in LTspice:
According to this calculator, I should be getting 140V output.
My output is only 115V. I suspect it's something to do with the MOSFET, but I ...
- 217
1
vote
2
answers
760
views
Can I use common mode power line choke as 1:1 transformer in isolated buck-boost switched mode power supply at 20 - 100 kHz?
I'm planning to build a multi-output power supply that allows output voltages between 0 - 30 V and currents below 5 A. The idea is that I will purchase a number of 30V 5.3A power bricks (unknown if ...
- 1,762
0
votes
1
answer
476
views
In DC-DC converters, how can the ripple current affect the circuit's performance?
I have a DC-DC buck boost converter (TPS55288) that I was planning on using for a project. I'm making a revision to my current heated gloves, and my circuit needs to be as small as possible since the ...
- 1,195
0
votes
1
answer
105
views
Can this Noise Suppression Filter/ RF Inductor be used in buck/boost converter instead?
Say I have a buck/boost converter operating at 100Mhz. Would this inductor (VAF201610FA-841-1) be a good choice if I needed larger inductance, over other fixed inductors? (considering I do not surpass ...
- 3,404
0
votes
1
answer
121
views
the sound from the coil when the current is drawn
I have buck-boost converter using a TPS630250(4.2 ->Vin) - (3.3 -> Vout) in my PCB. This buck-boost converter can draw max 4A in buck mode and max 2A in boost mode.
While there is no load or ...
- 15
0
votes
0
answers
65
views
Power output from a buck boost circuit is too low
Thanks to all who helped on the earlier part of the circuit - that's now fixed and working.
Now the buck boost circuit to drive the LED is working, but it only puts out a very small fraction of the ...
- 11
2
votes
2
answers
2k
views
Why is the Irms so different from Isat in different power inductors?
I'm looking at power inductors for a DC-DC boost converter clocked in the 500KHz range (but KHz could change if necessary). Here are two examples:
Example 1: Irms=55A, Isat=140A, 70nH
Example 2: ...
- 2,088
0
votes
1
answer
113
views
Generally, how do you describe the functions of the basic parts in a buck or boost converter? The parts are enumerated in the post [closed]
Here is a homework question I am answering.
1. Explain the function of the following parts in the DC-to-DC converter.
a. MOSFET
b. Schottky Diode
c. Inductor
d. Capacitor
Here is an accurate basic ...
- 469
1
vote
3
answers
3k
views
Where does the negative inductor current go during CCM at no load in synchronous converters?
As you all know, there are two primary mode of operation for dc-dc converters : CCM and DCM. At no load, the inductor current stops at zero at DCM. However, if CCM is enforced (such as Forced PWM), ...
- 109
1
vote
1
answer
123
views
How does an inductor limit a voltage booster?
I’m making a voltage booster to boost li-ion voltages 3v-4.2v to 5v with high current and a small footprint. I’m using TI’s Webench tool to help. It suggest a 1uH inductor for a 12A load, but if I ...
- 487
0
votes
1
answer
478
views
Complete discharging of Initially charged capacitor through Inductor
I have been trying to simulate a parallel resonant circuit in Pspice . The idea of the circuit is to discharge C18 (Cin) completely (This cap is initially charged to 1.3 V) through the inductor and ...
