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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)

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DC-DC Converter - Why is the input voltage called Vg?

In the textbook I'm reading (Fundamentals of Power Electronics 2nd Ed, Erickson and Maksimovic), the input voltage for several different types of converter circuits is labeled Vg. The textbook gives ...
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2answers
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How does buck converter increases current

I am confused regarding this, in buck converter Pin=Pout, so if I reduce voltage then current has to increase but my resister load is fixed at, say, 5 ohms - but resistors follows Ohm's law and ...
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2answers
48 views

24v dc High current variable speed Voltage regulator

I’m in need off a high current voltage regulator. I know a little about electronics, but not on an engineering level of designing stuff. I have a few stuff on scrap boards that I can use that lying ...
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0answers
21 views

Stability of Buck Converter when output capacitance is variable

I am designing a buck converter for an application that has several different loads. Depending on what devices are connected, the capacitance seen at the output of the buck converter can vary ...
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1answer
46 views

Is this inductor suitable for using in a 1A boost converter?

i have been working on making a boost converter circuit to incorporate into my PCB and have ordered these inductors. I believe i have tracked down the datasheet(difficult with these cheap chinese ...
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1answer
43 views

Common ground for different voltages

I see there are a number of questions regarding this but none made it clear to me, so I'll risk being virtually stoned and go ahead and ask it again. I have a 12V battery which powers some 12V ...
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1answer
87 views

Buck-Boost converter without low side switch

Please look at the buck -boost converter below. It is 2 outputs, one buck and one boost output. Would the circuit work as describe in the picture? In what condition the circuit will it work? If so how ...
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1answer
44 views

Powering 4.6 V with 5 V USB power supply

I need an output of 4.6V 900mA from 5V USB power supply. The smaller the better, what is the best way to achieve such conversion. I want to mod Nintendo DSI XL to charge it using USB micro. Case says ...
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0answers
40 views

Boost converter with a non zero reference [on hold]

Will the general formula for boost converter relating output voltage(Vout) to duty cycle(D) still hold for the circuit in the link below? How different will be cuircuit behavior with this setup as ...
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31 views

voltage multiplier DC from BLDC three phase motor

Hi there engineers and electronic experts, I'm doing some research about regenerative power from BLDC motor three phase. Motor is 1000W rated, with 3 wires for three phase output. The idea is to use a ...
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1answer
50 views

Buck converter internal structure

I want to understand how LM2574 step-down regulator works and I can not find the logic of the comparator in the following picture: Can anyone explain ?
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0answers
63 views

Power Supply Nixie tubes (IN 9)

I am in big trouble with my power supply for Nixie tubes (IN 9 bargraph.) I need 140V -160V (150V prefered) output voltage and 10x 12mA --> ~140mA current. (~ 21W). I tried to design boost ...
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2answers
72 views

Is it possible to get a floating power supply to power multiple MOSFETs

Hey guys this is my first post on stack exchange so please go easy on me! I have a hobby project where I was trying to make a few batteries go in series using a micro controller and a floating power ...
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1answer
61 views

Boost converter: doubts on signs voltages

Please, if you could explain me why on step-up (boost) converter the sign of the t-off voltage part is positive in the following equation: Vd * tOn + (Vd - Vo) * tOff = 0 I thought that the ...
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51 views

Switch DC/DC Converter through Fiber Optic Signal

I need to send a signal through fiber optic to switch a DC/DC Converter (I want it to be on when there is photocurrent, and off when there isn't), I can't use a normal cable because I want to do that ...
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1answer
88 views

Dc-Dc converter from 12v Input 400v Output

Maybe my first question Dc-Dc converter from 12v Input 400v Output was too broad for what I was actually trying to solve, which is why I am reformating my question. I want to charge a capacitor (C=0....
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1answer
154 views

Ideal 24V DC to DC 5V Converter just to feed 556 IC

I'm trying to find a best match for a regulator that can feed dual timer ic. The 5V circuit is dedicated to that IC which will generate a PWM pulse signal to PWM control the FAN speed. It's a 4 pin ...
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1answer
42 views

Traco DC DC Can I connect -Vin and -Vout

I'm using Tracopower TEL 5-1211. Can I connect both -Vin and -Vout to gnd of my design? Thanks
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1answer
44 views

Boost Converter Output Ripple Current

I am designing a boost converter with the help of this TI app note My output Load current is 300mA and output voltage is 28V. I need to calculate the output ripple current. But in the app note, no ...
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1answer
54 views

DC-DC converter not simulating correctly

I am trying to design a solar charge controller to charge a 12V battery, my solar panel is made of 9 cells that are 5W and 0.5V per-cell. I would like to make a booster circuit to get the voltage up ...
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2answers
215 views

Inductor Symbol? What does this symbol indicate?

In the diagram below the symbol labeled L1 is described as: 1.5mH, Core: SM CM20 x 12 x 10 But what does this symbol show exactly? I have searched thoroughly and cannot find this symbol and am ...
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0answers
14 views

+24VDC to 5v converter - does the positive make a difference? [migrated]

I have a fairly general question, but cannot seem to find an answer to confirm my thoughts. I have a garage motor door, and on the top has 4 terminals - 1 and 2 for a switch button to open and close, ...
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2answers
108 views

Using a capacitor instead of inductor in a switching regulator, and viceversa

Contextualizing more: In a switching topology, and I am butchering it now, the inductor gets "charged", and eventually will keep an amount of energy "just enough" required for the load. This is ...
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1answer
38 views

Measure Power Consumption of Battery Charger?

I want to ask how to measure power consumption of battery (Li-On 18650) charger module (TP4056 and USB Boost) and the total power consumption, if i have this circuit: I have already know the power ...
0
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1answer
16 views

Under-voltage lockout programming on Delta D12F200 DC/DC converter

I recently decided on the Delta D12F200 DC/DC converter for my current project (datasheet: https://www.mouser.com/datasheet/2/632/DS_D12F200-1141659.pdf). My project will be powered by lithium ion ...
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1answer
51 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. ...
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1answer
50 views

Designing a circuit using an LT1073 DC-DC Converter

I'm currently designing a circuit to convert a 24V (±30%) to supply a 3,3V IC used to monitor currents. I need to use the LT1073 which has the following diagram. The operations of the component and ...
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4answers
6k views

What do the “optional” resistor and capacitor do in this circuit?

I'm designing a circuit that includes a boost converter with a few mysterious "optional" components and I'm trying to decide whether or not to include them. Does anyone know what they do? At first I ...
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1answer
30 views

Converting 5v PWM Noctua NF-A8 to 12v

I bought two fans for my PC case, but I accidentally ordered the 5V version of the fans. The box states that CAN'T be run on 12v of regular Motherboards or the'll die. I happen to have a step-down ...
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1answer
52 views

Converting a 9.6V NiCad Drill to Li-on [closed]

I am trying to convert my 9.6V NiCad drill to run off a 12V Li-on battery. When I connect the Li-On directly, the motor only just slightly spins and stops. The only way I can get it to work is using a ...
0
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1answer
23 views

Pulse frequency modulation mode in buck converter MAX15062

I am modelling MAX15062 DC-DC buck converter using datasheet in PSpice, initially i worked on control loop. This buck converter has two modes PWM and PFM mode. With MODE pin unconnected works on PFM ...
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0answers
37 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 ...
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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 ...
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0answers
44 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 ...
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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 ...
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2answers
96 views

Negative Voltage Converter

I need to generate a negative voltage of approximately -12V from a 12V power supply. I read about ICL7660A that performs supply voltage conversions from positive to negative for an input range of +1....
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0answers
51 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 ...
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1answer
54 views

Measuring current from solar panel using an arduino?

I am designing a MPPT buck converter and bought ACS712 30A arduino current sensor and it is awful. Not accurate at all. so I find two configurations circuits that might help find an alternative to ...
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4answers
337 views

Is DC-to-DC (24 V to 12 V) buck conversion typically more efficient than AC-to-DC (110 V to 12 V) conversion? [closed]

While building an online UPS system, I'm basing the choice to eliminate as many AC inverters from the system as possible because of the assumption that DC-to-DC conversion is more efficient than AC-to-...
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1answer
63 views

How to remove the noise on the video of the DС-DС converter?

I had to make my own DC-DC converter on the TPS54360 driver. But because of the driver for two cameras are very strong interference. I want to try to isolate the driver GND and design it with a track ...
0
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1answer
61 views

Why I can't get the desired output when simulating this dc to dc converter circuit?

I found the below attached circuit of the TPS54560 4.5V to 60 V input, 5 A step-down converter. It is supposed to give an output of 10.8 V but when I simulate it I can't get more than 1.5V or 2V. I'...
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3answers
103 views

Is it possible to convert 6V 4A (24W) DC to 12V 3A (36W) DC using step up booster?

I have Yamaha RX100 1996 model which has 6 V power supply. This 6 V power supply is the main drawback for the headlight, where the circuit diagram is shown in these images: The official ...
0
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2answers
96 views

Why does voltage change with load in buck/boost converters?

I recently learned about buck and boost converters. Both are switched-mode power supplies. Until recently, I had the impression that the duty cycle and input voltage determine the output voltage for ...
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1answer
86 views

How to convert 220 VDC to 24 VDC

I’m working on a project where I need to build a converter/power supply for converting 220 VDC to 24 VDC. Yes, its 220 VDC not AC. This convertor will be mounted on a locomotive type vehicle ...
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0answers
35 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 ...
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1answer
40 views

getting arduino PWM from 0-5V to 0-10V or 0-12V?

I have an IR2110 driver and a LOD voltage regulator 15V from a solar panel. now this will supply 15V to VCC as shown below. Since I have a LOD voltage regulator of 15V, I can't apply the same voltage ...
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1answer
32 views

Does a DC isolator smooth the voltage as well as a regulator?

I'm designing a power supply for multiple guitar pedals. To minimise noise I'd like the output voltage to be smooth when it's up and running. (I don't mind about small transient fluctuations when ...
0
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2answers
46 views

Is it possible to control DC-DC boost convertor by N-ch MOSFET @ Vin-?

With the widely available DC-DC boost ready built modules based on MT3608 chip can I control it by adding the N-ch MOSFET to the Vin- line like this: The module itself are pretty reference in design ...
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3answers
77 views

How to reduce DC Voltage and Current [closed]

I have a 12VDC/5A from battery. I want to use that battery to supply 3.3VDC / 600 mA of microcontroller. How should I do it?
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1answer
47 views

Using IR2110 driver in synchronous buck converter?

in using MPPT charger for battery, can use a variable input- fixed output voltage regulator that will be connected to the solar panel input?, this way I can have 15V for VCC and 5V for VD. I really ...