Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [dc-dc-converter]

DC-DC conversion. Implies conversion of a DC voltage level up or down. DC-DC converter can be isolated or non-isolated. Electronically it can be done by many kinds of circuits, depending upon the application (charge pumps, voltage multipliers, linear voltage regulators, boost/buck switched converters, etc)

4
votes
0answers
3k views

Dual active bridge converter

I'm having issues calculating the power losses associated with the operation of a bidirectional isolated Dual Active Bridge DC/DC converter. The converter is controlled using Phase Shift Modulation (...
2
votes
0answers
30 views

Ripple in output voltage

I am working on an Active Clamp Forward converter. Schematic is given here: Specs: Output voltage-5V Input voltage 26..42V frequency=500KHz Output power=10W It is working fine in open loop, but in ...
2
votes
0answers
113 views

How can I size the current ripple of a DC-DC converter for lithium batteries

I am designing a bidirectional DC-DC converter to charge and discharge batteries on a DC bus. The power of this converter is 50 kW and the average current in the inductor (the same as that on the ...
2
votes
0answers
80 views

PoE+ Forward Converter Issues

I want to implement a 12v PoE+ PD power supply, and have settled on the LTC4269 for use in this application. Unfortunately I'm having problems getting my head around everything that is going on. A ...
2
votes
0answers
112 views

55-650V to 5V DC/DC convertor design

For an application I am building I need a custom DC/DC convertor that can convert a voltage ranging from 60V-600V to a contant voltage of around 5V. Using the TI Webench with the paramaters Vin_min = ...
2
votes
0answers
129 views

Why does my SEPIC converter output more power at higher temperatures? What are the implications of this behavior?

I have a Pololu S18V20ALV SEPIC voltage regulator board that is wired to a high-amperage 5V USB power source on the input and a DC brushless fan on the output. The output is set to about 5.5V. ...
1
vote
0answers
21 views

Using a switching DC-DC converter in high dynamic range current/voltage sensing

I'm thinking of making a power meter circuit which will have a high-side current-sensing amp (LTC6102), a resistive voltage divider for sensing the voltage, a dual op-amp (OPA2365) as a buffer for the ...
1
vote
0answers
25 views

Current Controlled Potentiometer

The core problem I am having is that I need to be able to control a DC to DC voltage regulator based on input from a 4 to 20 mA signal. The end goal is to have the output voltage of this regulator be ...
1
vote
0answers
48 views

2 Switch Forward Converter Volt-Sec/Charge Balance

I am attempting to design a 2 switch forward converter. I understand how to do the volt-sec balance and charge balance when the converter is as shown in the ideal 2 switch forward converter below. I ...
1
vote
0answers
145 views

Controlling Buck converter (XL4016) with microcontroller

Briefly the project I'm working on is made up of a blue pill, rotary encoder, acs712 30 amp current sensor and an OLED display. Everything is in functional state. The aim is to provide a stable ...
1
vote
0answers
29 views

Size and weight of DC-DC vs DC-AC at equivalent powers

I am looking at designing two power systems for a project and was wondering, at equivalent power, let's say 10kW, what is the system that is easier to design, can be smaller in volume and lighter in ...
1
vote
0answers
88 views

Designing a +10 V -10 V +7 V DC power supply for audio equipment

I've recently purchased a tape recorder (Tascam Midistudio 644) that was very cheap because the previous owner had lost the power supply. The PS-M1 power supply that originally came with this unit is ...
1
vote
0answers
45 views

Isolated vs non-isolated boost converter for LED (12v to 24v)

I have a 12v system in my motorhome and planning on installing 24v LED strips, however, I'm unsure whether I would need an isolated or a non-isolated boost converter. I'll be using roughly 5 meters ...
1
vote
0answers
39 views

How to generate and/or improve this power distribution for these 4 subsystems?

I am trying to design a system that is powered through a 28V wall adapter and a 6S cells LiPo battery. The system has a subsystem that takes care of the balanced charge, coulomb counter, charge ...
1
vote
0answers
81 views

Why is the negative rail oscillating in this TPS65130 based design?

I designed a board with +-10V dual rail supply that are generated by a TPS65130. The design is loosely based on the reference schematic and layout. I had to move some components around due to board ...
1
vote
0answers
132 views

Laser Diode Driver and Cooling

I am a newbie at analog design, and trying to design a laser diode driving circuit and TEC cooling circuit for a 14 pin laser diode, such as P1550-ADF-B: 1550NM ADF LASER DIODE which has forward ...
1
vote
0answers
38 views

Synchronus dcdc converter shunt RC filter design

I'm struggling to find a guide/application note or whatever that explains the calculation, considerations and layout of an RC filter for current sensing on a synchronous DCDC converter (like the ...
1
vote
0answers
87 views

Charging 3.7V battery from 300W+ generator

I am doing a project involving a bike generator of 500W. All of my previous projects were small LiPo battery powered devices so I want to double check certain aspects of this relatively high power ...
1
vote
0answers
79 views

Possibility of hybrid forward-flyback topology

Within the context of isolated converters, the flyback topology is nice in its simplicity as can be the forward topology, in spite of needing a second primary reset winding. However, both make poor ...
1
vote
0answers
50 views

Constant output voltage from varying DC for ZETA

Am modelling a variable DC fed ZETA converter.The output is expected to be constant at 20V. The design is followed from Texas instruments documentation (link). The source is expected to operate ...
1
vote
0answers
214 views

High current draw through DC-DC boost circuit

I currently have a simple circuit below which works fine but I am confused with the readings I am getting for when the Atmega1284P is put to sleep. When it is operating I get a current draw of around ...
1
vote
0answers
130 views

SEPIC converter working in BURST mode without having one

I designed a SEPIC using the LT3467 with coupled inductors. It supply 17V starting from a 12V input. On the simulator (LTSPICE) everything works, but on the test board there is a problem. With 70mA ...
1
vote
0answers
106 views

How does this circuit oscillate?

I once found out that basis of this circuit looks like a Royer oscillator. What makes this circuit oscillate? Especially, it is still not clear in my mind that what is the function of capacitors and ...
1
vote
0answers
329 views

Bidirectional Converter Switching problem on Mosfet

I want to ask. I designed a bidirectional converter with synchronous buck converter as the circuit configuration. The problem is, the switching mosfet. When i applied lower voltage at the input (10V), ...
1
vote
0answers
394 views

Analysis of a Bi-directional DC-DC converter

I'm building a bi-directional DC-DC converter that will be used to charge and discharge a supercapacitor stack. The design we came up with uses a 4-quadrant chopper, to allow buck-boost both ways. I'...
1
vote
0answers
149 views

resonant frequency in a series resonant converter circuit

I am designing a series resonant converter and wanted to convert 700 VDC to 100 VDC by using galvanic isolation. The switching frequency should be about 300 kHz (the output load is R = 1\$\Omega\$). ...
1
vote
0answers
179 views

LTSpice simulation :Unable to check the output values

I am new in LTSpice simulation .I have prepared the schematic of the following DC to DC buck converter design in folder i.e. C:\Program Files\LTC\LTspiceIV\Rough\ . My aim is to make a charger for a ...
1
vote
0answers
632 views

Design of a half bridge converter

I am trying to design a half bridge isolated DC DC converter but I am encountering some issues. Is there an effective way to come up with a minimum value of capacitors C1 and C2. In all the papers ...
1
vote
0answers
133 views

Active clamp forward converter (High side and lowside) with synchronous rectification

Please help me with the detailed description of Active clamp forward converter with synchronous rectification.I have seen a lot of journals regarding this and I am getting more confused when I ...
1
vote
0answers
331 views

Fly-back converter

I'm trying to get 2 isolated outputs (5V and 3V from 12V DC supply) using a single flyback converter by adding one more secondary winding on the flyback transformer. Following is the Simulink model I'...
1
vote
0answers
1k views

DC/DC Converter MOSFET switching

I am currently building a SEPIC converter. The signal arriving from the MOSFET driver to the MOSFET seems all good, however the Vds doesn't seem to follow the drivers signal and it makes the MOSFET ...
1
vote
0answers
2k views

Step Up DC DC [12 to 300] using MAX1771 Chip

I am trying to build my first circuit following the information posted here 12v to 300v Boost Converter - Ideal Inductor for 9kOhm load I tried to answer there before opening this new topic,but I need ...
1
vote
0answers
257 views

How can this isolated DC/DC converter claim a 3kv rating?

I'm referring to the Murata Power Solutions CME series DC/DC converters. Datasheet: http://www.murata-ps.com/data/power/ncl/kdc_cme.pdf If you look at the footprint of package (the -3C variant), ...
1
vote
0answers
1k views

Inductorless DC to DC step up converter

I'm trying to make a DC to DC boost converter without inductors. Actually, I don't know much about this kind of circuits. I did a research on the net and I found the circuit below. But the problem is ...
1
vote
0answers
165 views

Multiple stacked DC-DC converters

I am trying to minimze the output voltage ripple of a 4-layer pcb power supply and am curious as to what approach would be better. So I have 6 low voltage high amp buck converters feeding 6 chips. ...
1
vote
0answers
337 views

Trying to choose a high current DC/DC step-down converter

I'm working on a project that will drive a long length of LED strips, the WS2811 kind built into 5050 LEDs on a flexible strip. I've got most of the project worked out, except for power. Since it ...
1
vote
0answers
462 views

How can I build a 12V to 24V DC-DC Converter with up to 3A of Output current to power up a motor

I've built a 12V to 300V boost covnerter using a MAX1771, but now required one which can handle up to 3A with a 24V output. Should I attempt this task with the same chip or could someone point me in ...
0
votes
0answers
44 views

Buck/Boost converter TPS63070RNMT is not working properly

I am working on a Buck/Boost converter design which is based on Buck/Boost converter TPS63070RNMT. Below is the schematic design. All the selected components are as per the Section 9 of the datasheet. ...
0
votes
0answers
35 views

3V to 20V DC - DC boost converter help

I am sorry if this question has been asked before, I couldn't find exactly what I'm looking for. TL, DR: I'm looking for a way to boost 3V to 20V that: Works from a single cell lithium ion battery ...
0
votes
0answers
18 views

Noise in DC/DC Converter QHL600300S12 (180V-425V to 12V) output

We are using a DSO TDS2022B from Tektronix to check output voltage of DC/DC Converter QHL600300S12 from XP Power and were seeing 5V peak-to-peak in the 12V output power rail. What could be the ...
0
votes
0answers
41 views

Simulation issues in Buck converter design

I'm trying to understand Buck Converters by designing & simulating a circuit in www.Falstad.com circuit simulation tool. Here is the link to the circuit that I've Designed. link to circuit ...
0
votes
0answers
27 views

How to design a feedback system for pulse generation in split-pi converter?

How do I design a split-pi converter with feedback and simulate it in Matlab? The main difficulty is in designing a feedback system that will compare the output of the converter with the reference ...
0
votes
0answers
49 views

210v DC CV/CC supply

I have an old variable power supply that consists of a multi tapped transformer, a bridge rectifier and a choke. The transformer has two sets of taps on it, 6 coarse and 6 fine, giving 36 voltage ...
0
votes
0answers
34 views

Why Webench power tool suggested using this Hot-Swap Controller (TPS2420) for my design?

I was trying to build dc to dc converter that has one input which is anywhere between 9V-20V and has 4 outputs: 5v @ 2.5A, 3.3V @ 2.5A, 3.3 @ 1.5A, and 1.5V @ 1.5A. So, I sequenced the outputs and ...
0
votes
0answers
29 views

Solar panel voltage with buck converter and mosfets?

If the input voltage of the solar panel as Vin in the picture below. if Vin is in the range of 10 V to 37V.The average voltage value in the node in yellow during switch 1 is on and switch 2 is off is ...
0
votes
0answers
23 views

Oscillating boost converter output voltage that has a differential amplifier for load, in DRV8662 piezo actuator driver IC

I am building a circuit to drive a piezo stack in a pulsatile fashion and I am using the DRV8662 piezo driver from TI to do so. The circuit diagram is shown here (please disregard the several ...
0
votes
0answers
35 views

Should I add a DC link capacitor between HV battery and buck DCDC converter?

My application does not require an Inverter. If i don't need the capacitor,is it still better to add a resistor to drain any other system capacitance voltage?
0
votes
0answers
96 views

Solar charger for lithium batteries

I am trying to build a 2s 7.4V solar charged lithium battery pack to power an arduino UNO and SIM900 GSM shield. I have a 12V, 10W solar panel, BMS protection board and a DC-DC CC CV buck converter ...
0
votes
0answers
19 views

Converting boost controller to sync boost controller using H-bridge or 2 gate drivers

I am trying to reduce power losses in a boost led driver. For example TPS92690, uses a MOSFET and a diode for boost mode. Is it a bad idea to use H-bridge instead, or two gate drivers (one in straight ...
0
votes
0answers
54 views

Buck Converter Load Regulation

I have attached a schematic of a buck converter circuit I have designed. It's designed using a LMR16030 IC. Input voltage: 12-14V Output voltage: 5V Switching frequency: 1MHz Output Current: 2A I'...