All Questions
Tagged with dc-dc-converter pwm
56
questions
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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
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votes
2
answers
62
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Op amp as a comparator output turning partially high when it's supposed to be low
I'm using an AD823 op amp, as a comparator as part of a feedback loop in a boost converter. Although the boost converter and feedback portion functions as desired, the problem is when I check the 13 V ...
- 69
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1
answer
87
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UC3844 IC duty cycle problem [closed]
Recently I started building a flyback converter with a targeted input voltage of 12-24 V and output voltage of 150 V. The swicthing frequency is set to 100 kHz, for testing purposes I've used a ...
- 81
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60
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Welding machine schematic: PWM controller connections
I don't understand why the VFB pin of the UC3845AD PWM controller is grounded, and why the compensator pin is connected to the output of the LM224 through VD1 and VD2.
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1
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Building a constant current circuit [closed]
The constant current output should be able to be set from 0.2 mA to 20 mA with a load of 3500 ohms ±50% from a 5V battery source and a PWM signal set by a microprocessor. Do I need a transformer or ...
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Interleaved PWM Generator for DC-DC Converter
I have an PWM signal ready from opamp which has an switching frequency around 10KHz what can be done to obtain an interleaved version (T/2 Delayed version) of this signal
FYI,
I have used sawtooth ...
2
votes
1
answer
151
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Is it possible to include a behavioural source in an LTspice sub-circuit for use in a buck converter model?
I'm in the process of modelling a buck converter following the approach in Sam Ben-Yaakov's A unified SPICE compatible average model of PWM converters article in which he models a switched inductor ...
- 137
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40
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Are there any problems to expect when you add a MOSFET to a DC/DC converter to add PWM modulation for LED brightness regulation?
I need to power LEDs from a solar powered setup with a 12V battery, around 25W of power.
I want to be able to dim the LEDs using a microcontroller.
I was not able to find a reasonably priced DC/DC ...
- 11
1
vote
2
answers
312
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DC-DC buck converter duty cycle issue [closed]
I want to make DC-DC buck converter with a PWM controller, gate driver, and MOSFET switch. But I can't find the PWM controller that matches my requirements: input voltage 40 V, output voltage 24 V ...
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4
votes
3
answers
547
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Is this boost converter feedback technique a good idea?
I am in need of a high voltage supply, capable of 15mA at around 200V for a valve/tube preamp. This supply has to be low noise and any switching noise kept out of the audio band.
The incoming voltage ...
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516
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Can a PWM solar charger use a battery as the source?
For background, I am slowly migrating from 12v to 24v, but want to use my existing 12v inverters if possible, by having a 12v battery kept topped-up by the 24v batteries.
I have a decent MPPT ...
1
vote
3
answers
573
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DC motor: DC-DC converter vs PWM
In a cave we are exploring we are currently blocked by a small siphon, which we would like to empty into another gallery.
For this, I would like to use a 12 V pump (not selected yet).
As a power ...
- 7,697
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2
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1k
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High Voltage PWM
I really hope someone can help me with this difficult issue:
I want to generate a PWM signal from a 170V DC input.
ok, so far I have an arduino that can generate a PWM signal and drive a MOSFET that ...
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-1
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2
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323
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Synchronous DC-DC buck converter I saw online
I constructed this synchronous buck converter circuit I found online and I wanted to know how reliable it actually is: ( I used a battery source for the VCC+ pin on the op-amp because the 12 V line ...
- 633
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69
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DC-DC step down converter frequency isssue
I want to power a heating element (24V,2.5A maximum). I decided to use a push-pull configuration with LM27222.
Here is attached the circuit:
simulate this circuit – Schematic created using ...
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