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 ...

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0
votes
1answer
22 views

Automatic adjusting output into automatic adjusting input [on hold]

I have a solar panel with a built-in 6-18v auto adjusting output (based on draw) and a step up/down 1.5-24v DC-DC converter with an auto adjusting input. I was thinking of using them in conjunction ...
0
votes
4answers
63 views

Converting voltages using LM337

I have 2 questions: Is it possible to generate -35V from LM337 regulator with -12V in input?? The voltage output from LM337 is supposed to follow this equation, -Vout=-1.25(1+R2/R1)+Iadj.R2 but in ...
0
votes
2answers
61 views

unknown component in datasheet

im using xl6009 dc to dc converter , in page no 7 of datasheet the sepic inverting topology is show which generates 12 and -12v .my doubt is what component is used, is it a transformer or coupled ...
0
votes
1answer
25 views

Hall Effect Sensor - output error from heating [on hold]

What would be a best way to have DC to DC conversion from OBD2 12\24v to 5v for PIC where is also Hall Effect sensor? For example, if I use Mini DC/DC Step-Down converter and ACS712 sensor, they says ...
1
vote
1answer
83 views

convert [-24V,24V] range to [0V,3.3V] range

I need to realise a circuit that converts an analog signal from [-24V,24V] to [0V,3.3V] before sending that signal to an ADC "MCP3208", I found the circuit in the picture above,it works perfectly in ...
1
vote
1answer
27 views

What is a point-of-load converter?

Can you please give me a definition, or at least a more specific context, of the term "point-of-load" converter/regulator? I have seen around explanations on related products or applications but no ...
4
votes
1answer
106 views

What's an efficient way to get below the standard 1.25V on buck converters?

So, I purchased a buck converter which was advertised to be able to range down to 0.8V but, as you can probably guess, it only goes down to 1.25V which I understand is the reference voltage for the ...
0
votes
1answer
22 views

synchronous buck converter with different MOSFETs

do you know if it is possible to use different type of MOSFETs in a syncronous buck converter for the hi-side and the low side switch? How does this improve the converter efficiency? Thank you
0
votes
1answer
33 views

Equivalent of LTC3780 in Texas Instrument [closed]

Does anyone know of an equivalent for LTC3780? I have a design for LTC3780 that takes 9-20V input and gives an output of 12V/10A. It seems expensive so i'm looking for an exact pin to pin equivalent ...
1
vote
1answer
25 views

Negative voltage from positive output DC/DC

my DC/DC ( http://www.ti.com/tool/PMP10077 ) has 200 V output on pins +HV and GND. Can I get negative output by simply swithcing the meaning of output pins -> I will use +HV as GND, and GND as +HV. I ...
0
votes
1answer
46 views

Two DC DC converter with different output - In series or parallel?

Source: LiPo Battery (13V - 16.8V) Consumer #1: 5V (RaspPi) ~1A Consumer #2: 12V (variouse) 0-3A (plus ~1A if series) DC/DC step down: two LM2596 Which would be the better solution: LM2596 #1 on ...
0
votes
4answers
67 views

Implement ac-dc converter for low frequency and very low voltage without external powering?

Iam using a basic cascade voltage multiplier to boost and rectify the 0.3v ac signal. The circuit rectifies but the boost is very less. So I thought of using LTC3105 after this stage to get a ...
-3
votes
0answers
44 views

dc power isolation techniques

I need a circuit or a technique for DC power isolation. What i want to do is below; How can i do DC isolation between power and load? Can anyone suggest me several methods?
0
votes
2answers
71 views

Isolated 1-10V (or 0-10V) output

I need to control an LED driver with analog 0(1)-10V control input. This control device should be very cheap and compact so until now I made a schematic which uses the fact that those drivers have ...
-1
votes
1answer
33 views

How to reduce VOC of solar panels to match the MPPT of inverter

I will have an off grid solar panel system to run my deep well 5,5 Hp water pump. I already got 24 of 250Wp 36,3 Voc panels and 3 phase Delta VFD C2000 inverter/driver. for this system I need to wire ...
-1
votes
1answer
75 views

Convert 24V dc to negative 24V dc [closed]

My circuit is supplied by a 24V DC generator, but I have amplifiers in my circuit that need to be supplied by 24V and -24V, so I need to generate -24V dc from the 24V that I have from the ...
-3
votes
0answers
60 views

Better way to run 10 - 1W LEDs? [duplicate]

If I want to run 5 to 10 1Watt LEDs from battery, which is the better method ? connect the LEDs direclty to a 3.7V 3000mAh battery or Use a cheap DC stepup circuit with a a 3.7V 3000mAh battery ...
0
votes
2answers
39 views

Can I feed a 5V boost converter with 4xNiMH cells?

The spec page of my DC-DC boost converter (couldn't find a datasheet) says ”the input voltage should be kept below the output voltage”. And 4x the nominal 1.2V from an NiMH cell is below my 5V output ...
0
votes
1answer
34 views

Does current flow through the potentiometers of buck and boost converters?

I'm working on a project where I'm replacing the trimpots on a buck converter and a boost converter with proper potentiometers. The new potentiometers will be wired to the converters instead of ...
0
votes
1answer
53 views

How to make a -10 V DC power supply?

I need to make a -10 V dc power supply (I_max = 250 mA) to implement in a system where +-10 will be used for powering opamps and a push-pull. I have a 24 V dc available as power supply. Regarding ...
3
votes
1answer
59 views

Effect of using two buck converters in series

Are there any limitations of connecting two non-isolated buck converters in series? Just taking the output from the first converter and connect it as the input of a second converter to produce two DC ...
0
votes
0answers
32 views

Power good state when chip is off

DC-DC regulators generally have power good signals. I would like to know what's the state of the pin when the regulator is disabled (enable being low) or there is no input power. I belive since the ...
0
votes
2answers
84 views

why Boost converter output voltage decreases at high power?

I am implementing non-isolated Boost Converter, capable of handling a power of 1Kw and output voltage is to be maintained at 400V at an input voltage of 120V . At smaller load current (around 2.5 Amp ...
-2
votes
0answers
27 views

More current handling on LM2596 by adding a Transistor

I want to make an adjustable power supply based on a buck regulator. I try to add a power transistor in order to add more current handling on this DC-DC converter. I am using this concept. I remove ...
3
votes
2answers
86 views

Designing for DC voltage drop in low gauge wire

Are there any types of DC low voltage power supplies on the retail market that can accommodate for long wire runs (18 gauge wire). I am worried about voltage drop and power failure; I'm trying to ...
0
votes
0answers
26 views

LM5106 gate driver for synchronous dc-dc boost converter: protection of HS pin

I am using a Texas Instr. LM5106 as the gate driver for a synchronous boost converter. I read in the datasheet (par 10.1.1 - point 1) that Transient Voltages Below Ground of the HS pin may hinder ...
0
votes
1answer
56 views

Voltage Regulator that gives an output of 12V and 10A [closed]

I'm looking for a voltage regulator that takes 9V-20V input voltage and gives an output of 12V and 10A. I found a couple of buck-boost regulators that can do that but i just cant seem to simulate it. ...
12
votes
5answers
1k views

Anything special to consider when running a 12v “Bus” throughout my house?

I've recently begun playing a lot with tiny programmable computers/controllers (like the Raspberry Pi and the Arduino), and I'm planning to distribute several throughout my house as various sensors. ...
-1
votes
1answer
85 views

Issue in High side Mosfet in bidirectional Buck Boost Converter?

i am making bidirectional buck-boost converter. The schismatic of bidirectional buck boost converter is attached here. Buck Mode = when PWM is applied to Q1 , it work as buck converter. when q1 is ...
0
votes
2answers
57 views

DC-DC + LDO in series [closed]

Typically the question is: after having selected all the components in a schematic minus the Power Management systems, we then define which voltage and current each block will use, then we need to ...
0
votes
0answers
33 views

Anti-ringing boost converter

From the site, page 7, there is a functional block diagram of TPS61020 boost converter. As you can see there is an anti-ringing there. Does anyone here have an idea how this block is implemented? ...
0
votes
1answer
23 views

Boost converter with pulse skipping modulation

With boost converter using pulse skipping modulation, how is it possible for it to keep output voltage constant when load current increases? When load current increases, the output voltage decreases ...
0
votes
1answer
50 views

Advice on Buck-Boost Stage

In one of my circuit, the incoming variable voltage(8.5-24V DC) from the source will be first stepped up to 17V using a boost converter. The same output shall then be stepped down to different ...
3
votes
3answers
191 views

Why isn't Ohm's law working for this simple circuit?

I have a 70W 12V-500V DC power converter, and something in these pictures is not adding up. I run the 500V output through a high-voltage 332kΩ resistor. Now, using the left multimeter I ...
0
votes
0answers
33 views

How to power a 12v LED in a 9V 6LR61 battery powered circuit

What would be the most simple, efficient and cost effective way to power a 12V LED in a 9V battery powered DC Circuit? I cannot substitute the 12V LED, as its part of an IP65 vandal proof stainless ...
2
votes
2answers
156 views

Eliminate standby leakage current of output capacitor in a DC/DC converter charging a battery

I am using a DC/DC converter to charge a battery. The output current of the converter is about 6 Ampere at 41 Volts. I'm trying to eliminate the standby leakage current of the output capacitors in ...
1
vote
3answers
413 views

DC-DC Converter vs Switching Regulator

As an example, lets say I'm looking to convert 24V to 12V for a circuit that draws 800mA. I understand that a standard linear regulator is going to dissipate 9.6W so is out of the question here. So ...
-3
votes
3answers
65 views

Resistor or DC-DC converter?

I have 19.5VDC input voltage and a 12V fan to be operated. Should I use a resistor connected in series to adjust the voltage on the fan or a step-down DC-DC converter? The latter might be overkill but ...
2
votes
1answer
42 views

Error amplifier in dc dc converter chip

I am trying to design a dc-dc converter using the UC3844 IC. The working is clear to me. But the datasheet has an application circuit that is a bit confusing for me. The datasheet. The circuit in ...
0
votes
1answer
34 views

Selecting potentiometer for adjusting Vo in DC-DC step down

I am trying to figure out the correct value of a potentiomenter for trimming Vo in a step-down DC/DC converter. I am using a 150W 12V output DC/DC from murata. From the datasheet, equations are given ...
3
votes
2answers
40 views

efficiency calculation of dc-dc converter

I am designing a flyback converter circuit using the LT8302 flyback converter IC. Now, the efficiency of this chip is approx 85% as shown from the datasheet and the screenshot - The value of 85% ...
0
votes
2answers
40 views

Understand boost converter's voltage conversion ratio

Below is a boost converter with its inductor current waveform operating in DCM. The voltage conversion ratio of the converter is as follows: M(D1,D2) = V/Vg= 1 + D1/D2 where V and Vg are output and ...
2
votes
1answer
52 views

Analyse boost converter using the three rules

I am trying to analyse the boost converter operating in DCM mode below. By using three rules as here: Inductor volt-second balance Capacitor charge balance Small ripple approximation This what I ...
0
votes
0answers
25 views

LM4510 Step-Up DC/DC Converter Resistor Values

I am looking to use the TI LM4510 Step-Up DC/DC Converter in order to output 18v and 9v (on different projects) from 5V input. I'm useless at math and have had no luck looking around for something ...
6
votes
2answers
158 views

Maximum power out of thermoelectric generator?

The conventional method to extract maximum amount of energy from ThermoElectric Generator (TEG) is to load it with a resistance equal to the TEG's internal resistance as the maximum power transfer ...
1
vote
1answer
55 views

LM2776 Inverter is not producing -3.3v with 3.3v input

Background I am using a TI LM2776 Switched Capacitor Inverter (datasheet here) to obtain a -3.3v bias voltage for an LCD (Newhaven Display, NHD-12864MZ-FSW-GBW-L, datasheet here). The LM2776 is ...
0
votes
2answers
33 views

Can boost converter operate under these conditions?

I am wondering whether the boost converter is possible to operate with these conditions below or not: All components or sources are ideal Initial voltage across output capacitor is zero voltage. ...
0
votes
1answer
62 views

Impedance matching for maximum power transfer

I have a simple circuit as below. Assuming that all components are ideal. With R2 and L1 are fixed, is there a switching frequency so that the voltage at node labeled VTH is constant (or relatively ...
0
votes
0answers
31 views

Half bridge mosfet drivers

Hello I'm trying to make a DC-DC converter and I need to drive 2 mosfets using the folowing half bridge driver : http://docs-europe.electrocomponents.com/webdocs/0b3c/0900766b80b3c1b2.pdf Mosfet : ...
9
votes
1answer
153 views

Boosting 5V/2A to +70/-70V for op-amp rails?

I am trying to drive an ultrasonic "tweeter" for a wearable research project. Compared to a normal speaker, the tweeter has a very high impedance, upwards of 4kohm. As a result, it requires a very ...