All Questions
Tagged with buck power-electronics
129
questions
0
votes
1
answer
117
views
AP63203 Buck not working
Recently I have been experimenting with the AP63203, and I just have not been able to get it to output 3.3V successfully. Currently, the way I have been testing it is using an SMT to TH adapter, which ...
- 1
0
votes
1
answer
131
views
DC-DC buck converter's MOSFET or IGBT?
Motor Specifications:
Rated power: 50 kW
Rated voltage: 200V DC
Rated current: 250A
Battery Specifications:
Nominal voltage: 400V DC
Capacity: 50 kWh
Design Requirements of the DC-DC Converter
...
2
votes
0
answers
120
views
Power circuitry not coming up
I've created a PCB that has two buck/boost converters, the second one being connected to the output of first one. The enable pin of the second buck converter is connected to the PG pin of the first ...
- 163
0
votes
2
answers
153
views
Voltage not varying with duty cycle
I want to make a circuit that changes voltages with the duty cycle as well as doubles that for me. I therefore made a voltage doubler circuit along with alternating PWM wave. But as I changed the duty ...
- 669
1
vote
1
answer
114
views
Non-synchronous buck ASIC's diode selection makes sense?
While selecting buck converter ASIC for a design I came across various synchronous and non-synchronous buck converter from different manufacturers. Synchronous buck are OK - no problem with SW node ...
- 166
0
votes
1
answer
75
views
Buck and boost converter inductor confusion
I have seen that a boost converter uses the spikes of an inductor to step up the capacitor voltage as this spike is stored on the capacitor.
Why don't we get a similar effect in the buck converter? A ...
- 669
0
votes
1
answer
109
views
LM2576 TI Simulation not working
I have used the PSPICE model of LM2576 IC from the Texas instruments but the simulation is giving me false results. I have used the exact same diagram from the datasheet but the IC is not working. I ...
- 669
1
vote
0
answers
45
views
Noisy signal output from BD2320 MOSFET driver
I need help or technical solutions relating to this issue I encountered with BD2320.
I intend to use two BD2320 drivers for an interleaved buck converter. One of the channels works well, but after ...
- 11
0
votes
1
answer
357
views
Modelling the PID controller for a Buck Converter from a given schematic
I followed a document to implement a PID controller for a Si MOSFET based buck converter as the traditional multistep analog PID converter was not giving any good results for some reason. The document ...
- 1
0
votes
1
answer
79
views
Efficiency curve of synchronous DC-DC controller with external MOSFETs
I'm designing a 48V to 12V, 300W buck converter. I am considering using the LM5148 controller and NTMFSC004N08MC switches. I'm confused about how synchronous DC-DC controllers can list efficiency ...
- 198
0
votes
1
answer
50
views
Variable Vout of Buck Converter [duplicate]
I have been trying to understand the working of buck converter (without the use of a dedicated IC). So, I used LTspice to test a circuit on the parameters:
Vin: 100 V
Vout: 50 V
Freq.: 10 kHz
I: 5 A
...
- 117
1
vote
1
answer
191
views
Buck converter simulation(Psim) always return the half value of the output voltage
I try to design a buck-converter in PSIM simulation program. Let me write the circuit's requirements:
Frequency = 80kHz
Ripple < 0.5%
\$V_{input}\$ = 30V
\$V_{out}\$ = 12V
\$R_{load}\$ = 10 \$\...
- 11
2
votes
1
answer
280
views
Issues with voltage spikes on buck converter design
I am building a buck converter that I eventually plan on using in an MPPT charger.
I have not taken any power electronics courses.
Below is the spice model I’ve been using.
The issue is that point A ...
0
votes
1
answer
446
views
Buck Converter Gain Margin and Phase Margin Review
I am using this IC (MPQ4470) for designing a buck converter (12 to 5 V - 3 A). Below is my circuit.
I am checking the stability of this circuit. My phase gain plot is given below.
My PM is 92 degree ...
- 2,593
0
votes
0
answers
35
views
Power dissipation of synchrononous buck converter cannot be reduced with gate drivers?
For this project, I had to want to reduce the power dissipation (< 2 mW) when the Rload is 54 Ω. These are the two circuits that I have employed.
When I sweep the pwm frequency vs Pdiss (power ...
- 113