Questions tagged [boost]

A non-isolated DC/DC converter topology.

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4answers
546 views

How do I average a complex waveform?

I am trying to figure out how long my project will last on a single battery. It's powered by a single AA battery with an NCP1402 3.3 volt boost converter. I've determined that the target circuit draws ...
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5answers
5k views

Solar panel and dc motor

I want to run a 130V dc motor 2hp. I have 6 solar panel 120V dc out. I connected them in series to the motor directly and it runs, but when I check the voltage at the terminal when it is running it ...
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1answer
387 views

Transistor Level Shifting in Buck-Boost Converter

Ive been reading some of the LT application notes on Jim William's Analog Circuit Design book, and there's something I don't quite understand. I'm attaching a scan of the circuit in question. The ...
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2answers
252 views

Boost /step up converter efficient and very small for high current ? (with example)

Here you have a view of the external battery of Energizer (XP18000A) of 18 000 mAh. Energizer allows DC 19V, 3.5A in output : 19*3.5 = 67W There are 2 batteries, so 2*3.7 = 7.4V then batteries allow ...
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1answer
1k views

How create a low-voltage boost (~4v to 5v)

I am looking for a circuit that will go from a Li battery that has a voltage between 3.6v and 4.3v up to 5v - and I have seen similar questions such as this and this, but those just recommend ...
4
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2answers
4k views

Current boosting problem with 78xx

I've built a PCB with a 7805 based power supply on it. I tested the other parts of the PCB on a breadboard before I had the PCB made, but as the power supply circuit looked straightforward, I just ...
0
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1answer
5k views

12V DC to 220V DC Boost Converter

This is a circuit I am reviewing to generate 12V DC to 220V DC (output). At what component configuration can this circuit generate such output. The goal is to be able to at least supply 70 Watts of ...
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3answers
2k views

Hot MOSFET DC-DC Boost Converter

What: I'm designing a DC-DC Boost converter for a solar panel maxmimum-power-point-tracker (MPPT). Setup: I'm using a TPS2819 MOSFET driver connected to a FQD16N25C N-MOSFET. The TPS2819 is driven ...
0
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1answer
551 views

Minimum voltage rating for output capacitor for use with LTC3525-5 boost voltage regulator

I'm (still) selecting parts to build a 3 to 5V boost DC-DC converter using the LTC3525-5. The board I'm planing to build is based on the typical application shown in page 11 of the aforementioned ...
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1answer
60 views

configuring a dc:dc regulator

I'm trying to set up an lm2734 to regulate a VIN of 9V - 12.6V down to 5.0V. I'm a bit of a noob, and the sample configurations they provide don't have the 5.0V output scenario. My specific question ...
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1answer
382 views

Power Supply Design: Am I after DC-DC Controllers or DC-DC Converters?

I'm trying to design a variable dual rail power supply, which has an unregulated input voltage of ~11V and a maximum output current of 1A. I want to have a 5V/12V/20V positive and negative output. ...
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2answers
1k views

Problem with stepup BOOST converter

I'm using LM3478 converter to convert 12V to 30V in standard circuit for 456kHz. Circuit was working perfectly but when I was measuring something I demaged probably LM3478. I replaced it with new IC ...
3
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1answer
445 views

Measuring precisely the efficiency of a power converter

I am trying to measure the efficiency of a DC/DC boost-converter in several operating points as precisely as possible. Right now I am measuring my input-voltage and output-voltage with a multimeter, ...
1
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2answers
424 views

Current source for boost converter

I'm designing a boost converter to boost 3.3 V to ~25-30 V. I have successfully simulated it in SPICE, but the current draw for converter is enormous - about 8-9 A. How can I handle this nuisance? ...
3
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1answer
3k views

LM7805 and Zener Diodes

I'm boosting an LM7805 to 16V using Zener diodes in series at the GND pin (pin 2) of the 7805. The Zener Diodes I'm using are 1 of each of the following: 3.3V, 3.0V, and a 4.7V. Now theoretically I ...
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2answers
4k views

Simple methods for switching a boost converter, to get a stable output voltage?

I've made a boost converter circuit, with a MOSFET as a switch, and a (7)555 timer operating as an astable oscillator, and it's output goes directly to the MOSFETs gate pin. The problem is that the ...
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3answers
2k views

How/Where to boost voltage in a 555 timer to drive piezo transducer

I am trying to create a simple and cheap frequency circuit with a 555 timer to drive a piezoelectric transducer. The transducer I am using calls for a 48v input with 1.66Mhz frequency timing. I've ...
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2answers
435 views

Transistor as switch between similar voltages

I want to use an XBee to relay data coming from a serial device. The XBee will be sleeping most of the time; waking at regular intervals, powering on the serial device, relaying the serial signals, ...
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3answers
13k views

DC-DC step up from 3V to over 100V

I'm currently building a DC-DC step up circuit to step up 3V to 100V. I don't want to use transformer because i want to keep the circuit as small as possible. My thought is ... building a 30V-output ...
2
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2answers
2k views

Boost converter 100mV to 5V

I am trying to design a boost converter which converts 100mV to 5V. 100mV is the minimum I get from my DC motor which I used as a generator and max is around 1V. I tried searching for the IC's which ...
5
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1answer
251 views

What's wrong with my boost converter math?

I'm working some equations for a boost converter, and running into a contradiction I don't understand. Assume a steady state, perfect efficiency, and continuous conduction. Total instantaneous energy ...
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3answers
889 views

Convert 3.3v to 14v?

I want to use a 4D Systems OLED display with an ATmega32u4 based PCB. I'm still working on designing the PCB and have hit a problem. In the data sheet it says that one of the power supply pins for the ...
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3answers
916 views

Boost DC voltage converter for wireless temperature sensor (1.5V to 5V)

I'm trying to design a wireless temperature sensor powered by one (or maybe two) rechargeable NiMH AA cell(s). The sensor should read and transmit the temperature every couple of seconds and remain in ...
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2answers
836 views

IC boost converter performs poorly in breadboard prototype circuit: is this to be expected?

I'm using a TLV61220 IC boost converter to get 3.3V from a 1.5V AAA battery. I've built the circuit as specified on the datasheet (p. 1 of http://www.ti.com/lit/ds/symlink/tlv61220.pdf) with R1 at 1MΩ ...
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1answer
181 views

Efficient high amplitude current regulation, so I don't end up being sad

I have an unstable power source 0-10V (I don't actually know if it can drop to 0) from solar panels and I want to boost and stabilize it to charge 19V 2.1A laptop and a 12V 12Ah battery. I've already ...
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3answers
1k views

Powering RGB Leds from 2 AA batteries

For a hobby project I'm trying to power a PIC microcontroller and 4 RGB leds from two AA batteries. I have both the PIC and the circuit shown below being powered by the batteries and the PIC ...
3
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2answers
5k views

Why my boost converter is not working?

I am trying to get a boost converter working. This is the schematic: simulate this circuit – Schematic created using CircuitLab The clock signal is 12V and 100KHz, the output capacitor is ...
9
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4answers
2k views

Boost or buck regulator for battery life?

I want to make a wireless sensor node that will run at about 2.5v. I am trying to decide between running 3 alkaline batteries in series with a buck converter or in parallel with a boost converter. I ...
2
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1answer
1k views

Low power temperature logging to an SD card

I want a make a low-power data logger, for now just to read a digital temperature sensor (DS18B20) and write the data to an SD card. The device will be asleep most of the time and just wake up from ...
2
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2answers
376 views

Powering DSLR with buck/boost convertor

I've been experimenting a bit with time-lapse photography lately. Still basic stuff. Right now I have to change batteries every so often which is a pain because it's hard not to move the camera when ...
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2answers
409 views

Boost Regulator issue at high load

I'm trying to understand the causes of output voltage dropping as my load increases on a boost converter. The switcher i'm using is a TPS61093 from TI. I'm troubleshooting a circuit that someone else ...
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2answers
1k views

Troubleshooting a SEPIC regulator (MIC2296)

I am trying to regulate a 5V input, which drops to around 3.5V when a large load is applied. I need to keep the 5V steady, and I am willing to do this at the expense of current, which is why I thought ...
2
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3answers
2k views

How to troubleshoot a boost converter (ADP1613)?

I have attempted to put together a schematic utilizing the ADP1613 boost converter, and I am having no luck at all. I don't have a good understanding of how this device really works, so I don't know ...
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3answers
6k views

Solar Panel used in Conjunction with a DC to DC Step Up

Good morning all, I am trying to put a little project together where I used a 1 watt, 6v solar panel in conjunction with a 0.9V - 5V to 5V DC to DC boost converter. I hooked up the solar panel to a ...
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2answers
338 views

How can I regulate a 5V battery?

I am trying to use this 5V RAVPower battery pack to drive some electronics and a high-current load: http://www.ravpower.com/ravpower-dynamo-on-the-go-rp-pb07-super-high-capacity-power-bank-10000mah-...
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2answers
2k views

Bidirectional DC-DC converter, 12V - 300V, 1 kW?

What DC-DC converter topology would you recommend for a device that supports bidirectional power flow of up to 1kW with 300VDC on the high-side and 10-15VDC on the low-side? I want to use it to ...
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3answers
2k views

Motor Discharges Boost Converter Too Quickly

I am trying to step 3V up to 9V via a boost converter, the idea being I have the current but not the voltage to drive a DC motor. I used this this website to calculate the parts values I would need, ...
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1answer
169 views

Step-up converter generating too much voltage

I have the issue that I want to convert 5v DC to 12V DC. I have several 5v to 12v step-up converter at my hands which all output around 15v without any load connected. Now I heared these need a ...
0
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1answer
278 views

Is it possible to use buck boost converter at the same time?

I have a input source from 50mV to 4V and I want a fixed/regulated voltage of 3V. Input voltage is varying every time so in order to achieve the 3V I have to implement Buck as well as Boost converter ...
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1answer
495 views

Powering an iComSat GSM Shield and a Gear Motor with LiPo Battery

I have an iComSat GSM Arduino Shield (based on the sim900) and a gear motor that I am planning on using with a Teensy 3.1 microcontroller. I'd like to power the whole rig using a 2000mAh LiPo Battery ...
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1answer
1k views

Buck boost converter for lipo 6s charge info request

I need to dimension a Buck boost converter to charge two LiPo battery packs 6s 20ah starting from a variable input voltage. Both packs have their own PCB BMS board. This one: http://bestechpower.com/...
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3answers
2k views

Cheap high-voltage low-current source

I'm looking to make a high voltage supply for some geiger-mueller tubes (the ubiquitous sbm-20 russian surplus tubes that everyone uses). these don't require much current at all, so creating high ...
3
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1answer
751 views

How to turn LM2577 on/off?

I am using an LM2577 as a step-up boost converter (to boost 7V to 12V). I would like to be able to turn it on/off (there are certain times when it needs to be turned off). I have tried a transistor (...
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1answer
701 views

LM2577 based boost converter board gives random shut-downs with a 3.7v Li-Po

I recently bought a LM2577 based boost converter board from dfrobots.com such as the one below. I'm trying to use it to generate a stable 5v from a 3.7v 2100mAh Li-Po battery. The Li-Po voltage was ...
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1answer
341 views

Extracting the Most Energy From a Capacitor

I have a 5V super capacitor which I'm trying to extract the most energy from in the most efficient way possible. This capacitor is tied to the input of some regulator (which is the question of this ...
3
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1answer
426 views

buck-boost, SEPIC IC out 3.3V and min 500mA 0.1" packaging

I am building some sort of navigation device for a logisitics project in my company. The whole thing is going to be battery (6V) powered, so I'm looking for every possible way to avoid losses to heat ...
4
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1answer
1k views

What dc-dc topology to use for a 300W step-up converter?

I am asked to design a dc-dc converter with the following specifications: Vin=24V(2 lead-acid batteries in series), Vout=300V and Iout=1A. My initial choice of topology was the boost converter. ...
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2answers
2k views

powering +5v device with usb and/or battery

I made a PCB with an arduino clone and a tiny motor driver. The arduino clone itself needs +5 volt power supply, so I decided to use a DC/DC boost converter to boost a 3.7 volt Li-Ion battery to +5 ...
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1answer
161 views

Can I have 0.03V in the input of an OpAmp? If can, what type of OpAmp can I use? [closed]

I want use OpAmp as amplifier to increase my voltage. I have as input voltage 0,03VDC. I want increase it to become 5VDC in output. If I cannot use the OpAmp what type of circuit I should use to ...
2
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1answer
276 views

Power rail design from Li-Polymer battery chip output

Case: I am building a battery driven device and so far it seems like I will be using the MCP73871 to provide my device with battery power and charging via USB. (Datasheet ) I need to regulate the ...