# dc-dc converters

1. ### Why the boost converter cannot increase the voltage with a resistor load?

I have an assignment where I have to make a boost converter. this is the schematic of the circuit I have; the problem is that the boost converter can increase the voltage if the load used is a 2.5 watt incandescent lamp (can go up to 12 V), while if I use a resistor (100, 220, 470 ohms etc.)...
2. ### Not able to get high current from buck boost (sepic) converter made using TL494

I am trying to build a buckboost converter for converting 5-40v input to 5-35V output at 3A max to use it for many purposes by usign TL494. I am using a SEPIC topology as i want a non inverting output. I simulated the circuit in proteus. The circuit works fine when i connected a 500 Ohm load, I...
3. ### 12V to ±80V adjustable isolated half bridge converter.

I really appreciate if someone can help me a bit with this project. Its a half bridge topology DC-DC converter that takes 12V on the Input and transphorms it into a simmetrical 80V output (Maximum). The output voltage will be adjustable from ±18V to ±80V. I am using the SG3525 IC for this...
4. ### High-Current DC-DC switching regulator - Inductor Current limit

I have been "playing around with" some DC boost switching regulator designs for use in a solar panel DC-DC converter typically 33V to 48V. Typically I use a switching frequency of about 150Khz and an inductor of around 68uH - this seems an OK compromise for switching time losses, current ripple...
5. ### Buck Converter Simulation in Python

Hey everybody, first time here! As a personal project I am implementing a Buck Converter simulation in Python. My basic idea is to give a constant Vs supply and simulate the switch on/switch off steps in each switching period, calculate the increase/decrease in inductor current and calculate an...
6. ### Convert Square wave to DC continous wave

I know it is stupid, but I keep struggling with my problem. I have a Square wave 24DC + 9 AC. What happens is that theres is some communication protocol on top of that. I need to power some electronics with that line, but the Ups and Downsof the wave keep charging and discharging the coupling...
7. ### alternative Inductor for Evaluation boards kit DC2781A (using LT8316 )

Hi, I want to build the DC2781A evaluation board by Analog Devices. Most of the passive parts I already have, so the building cost would be much cheaper for me. However, I wasn't able to find a distributor that sells the inductor of this schematic: RPT129NP-102MB by Sumida. Therefore, I'm...
8. ### Using a Buck - Boost converter to get the desired output voltage

Hi, I am using a buck boost converter MC34063 to bring 14.8 V from four Li Ion batteries in series down to three different voltages 12V, 5V and 3.3V. I am planning to use the step - down converter given in the datasheet (image below) to do this but specifically how do modify the circuits...
9. ### what is the filter used in DC-DC flyback converter input ?

Hello, I was looking into using something similar to what is used in this reference design by TI. But I didn't understand the input side of this circuit, especially the purpose of the input series resistors and capacitors C1, C2, and C3. Can someone please explain the input side of this...
10. ### Boost converter design issue

For a circuit I'm designing, I want to use an MC34063AL-D08-T DC/DC converter (or a similar one; I just need a through-hole package) as a boost converter to boost a voltage $$V_{in} = 3.3-4.2 V$$ (coming from a Li-ion battery) to a stable output of $$V_{out} = 5 V$$, with \( I_{out} = 250 mA...
11. ### Gate driver for two switch forward converter

I'm trying to understand how to drive the MOSFET's in the two-switch forward, I designed a 200W DC-DC converter, 50V input 100V output but I was looking for using an MCU and IC in this case I have an IR2110 high side low side for the gate drive, I don't know if it is possible to use it? and if...
12. ### DC-DC Current Limiting

Hello, I'm looking to design a stupid simple DC-DC converter with two goals only: Current regulation to no more than 90 amps Lowest possible cost (total cost sub \$50) Can it be done? The power supply is a Prius. The Prius Gen 2 DC-DC converter (used instead of an alternator to charge the...
13. ### Best DC-DC Converter Topology

Hi, I'm looking for a DC-DC converter topology with the following characteristics: Input Voltage Range 2.7-5V Output Voltage: 12V Output Power: 1kW It is not of primary importance the isolation. Do you have any suggestions about the most suitable DC-DC converter topology (high power and high...
14. ### 13.6 V to 3.7v/5v DC-DC Step Down to run ESP8266

I have a garage door wall button which has 13.6v across. This is the typical wall button most of us have in the our homes to open and close the garage from inside the house. I want to replace the wall button and connect a ESP8266 IoT chip to control from smart phone and this chip only need...
15. ### Battery charger and MPPT controller

I am working on a project where i have to charge a battery from a PV panel source. I have a boost cascaded by a buck converter for my system. The boost converter for P&O MPPT and the buck for the 3 stage battery charging algorithm. So now I am looking to implement the control. So on a...