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with your current though....i woudl go for paralleled (interleaved) boost converters.........presumably they are current regulated, so there will not be able to hog the current, as you will regulate the current from each booster.
Hi, very poorly elaborated. What is AC voltage, what is DC voltage, how many phases, current, frequency. Please post some useful information. Klaus
The battery has a maximum output current of 2.2Amp. ... the GSM module consumes around 1.8Amps of current when sending and receiving message. This leaves small margin to drive additional devices. You'll drain even more power by stepping up the voltage to drive those devices. Can you be sure that battery volta
IR21362 datasheet has curves for IRG4PC50FD, suggesting that driving this IGBT without additional current booster is at least possible. Although the recommended gat resistor of 5 ohm is used, you can expect that limited IR21362 output current will slow down switching of IRG4PC50FD. Looking at IRG4PC50FD datasheet Fig. 9 switching losses (...)
Why not to use a booster transistor over the 7809 regulator to get 5A current capability for all 5 outputs to parallel loads? The only possible advantage of five 7809 regulators is the 1A current limiting for each 9V load. Using the series diode is possible but the voltage drop may affect the regulation of a 7809 as 3V more voltage input (...)
Thank you, it makes more sense when we know what R1 and R2 are! The reason why higher values are suggested in that schematic is simply so that less current is wasted. Some output current flows directly through the resistors to ground so if you use unreasonably low values you sink the current for no reason and just generate heat in them. (...)
THe current for Fans starts at a fairly constant current and then rises slowly to perhaps double the current from 12 to 24V as more work is done pushing air. Typical 4" muffin fans take about 5W and you would get perhaps 20% of the RPM at 12V. Adding resistors would only reduce the fan speed and dissipate more power in the series R's and (...)
The missing info is your wind generator power vs air speed and stall threshold. Then compute time to charge up 4Wh. (1Ah*4V~) vs wind speed. Unless RPM is regulated separately from boost DC-DC regulator for optimum power transfer , expect far less than rated power. Better to use higher voltage gen and Buck current booster with MPPT control Back
Good day. I have only 0.75A but I need 2A. How can I boost my 0.75 to become 2A? Need urgently. Thanks When you have a simple power supply or battery , current is limited by the ratio of voltage over resistance. So if you have insufficient current, the total resistance must be reduced (by proper selection) or the v
This won't happen with a simple DC solenoid. There's apparently some kind of initial current booster built inside your "solenoid". Otherwise the current would increase monotonically after connecting the power. Or there's a problem with your power supply and it's not actually capable of sourcing 5A.
I'm looking to boost a voltage of 3.6V to 9.5V with a maximum current out of 0 to 0.5A for battery powered device. Would like to fine an already built unit if anyone knows of one. Or a working circuit schematic that someone done or knows of a circuit I can use I done a search on Google. But? Wasn't able to fine what I needed. Maybe someon
The relation between driver current, (total) gate capacitance and switching speed applies for single and multiple transistors as well. In addition, you'll probably use individual gate resistors and for large MOSFETs current booster transistors.
Hello I am using Altium designer to simulate a current booster circuit but the program is too slow and even if I make the step bigger still slow the program make the Pc don't respond at all until it finish the simulation any hint or advice is appreciated thanks in advance
That's plain wierd! You have a current limited input rated at 3A max which wastes a lot of current in R5, a voltage booster using a microprocessor that needs an additional supply from somewhere, a 1 Amp / 4V regulator to power an op-amp that consumes 40uA and a 24V shunt regulator which will fry itself if it gets the chance. Add to that (...)
This is a bit of a mess. The OP has started 3 or 4 threads seemingly on the same topic. I answered one of the others here earlier. Apparently he wants to boost the output of an AD620 opamp to drive a current of up to 200mA into a load of 500Ω (or 120
All, I am working on my final year project: 2-Phase Interleaved Bidirectional DC-DC Converter with coupled inductor. I have two circuits diagrams as shown in the attachment. Please advise which of the cirduit diagrams will be most suitable for my design. My design specifications are: Input voltage-48V Output voltage-96V Output current-1
Please specify output voltage range and supply voltage. Some high current OPs can do, but a standard OP with transistor current booster is often better.
Another option you may consider is to take an op-amp with a suitable type output stage and add a current booster. This works well for low to medium output power applications. The op-amp must have a fast enough slew rate to accommodate the required voltage swing and needed frequency response.
FWIW, the LM3909 LED Flasher/Oscillator IC was intended to maximize LED duration from a 1.5V cell (now old but maybe still available out there). One of the app-circuits was for a booster (not a flasher) that drew only 4mA while feeding the LED with short high-current pulses @ 2kHz (constant to the eye). But I'm sure you might have a brightness trad
Better define needed voltage and current consumption, this should be guidance. Try to use Li-Po/Li-Ion and if you need use Voltage booster circuit to get 5V. Best regards, Peter
To get no voltage errors, you'll want to use a feedback amplifier with the current booster inside the feedback loop. Or a power OP with sufficient output current.
Assume A is a standard operational amplifier with e.g. 20 mA maximum output current and compensation current Is is is as high as 200 mA. Then you need a current booster stage like the complementary emitter follower shown in the schematic.
3.7V output... Are you by any chance looking for a way to light a bright white LED, using a single cell? There's an interesting circuit which has become popular under the name 'Joule Thief.' It will take juice from a weak battery and convert it to sufficient voltage/current to light a bright white led. It involves wrapping a tiny ferrite bead
On your original question: Need to increase current of voltage booster You are asking to get 1W approximately for your experiments. So I=W/E? = 1/9x9=.0123 = 13mA (approx). And I do not know what will be your circuit equivalent resistance. Hence the battery volts will drop and instead of boosting the current circuit may not be able
For a resistive load (which is what you are trying to emulate) if the mains goes up briefly then the current to that load goes up briefly too. so it is a good thing if a PFC booster emulates this. It also adds to the stability of the mains network, if the input current went down instantaneously (constant power load) as the mains voltage (...)
Your great problem is the charge of the circuit? what is it?? 1 Ohm?? 10 thousand Ohm? depending on this, your desired current may vary greatly. One great booster is the DC-DC chopper booster using a Bridge of MOSFETs alternating them with PWMs, and then using a transformer for amplification, and finally using a rectifier for your desired (...)
Hi friends, I have a relatively high impedance energy source of about 10~12V,4mA which amounts to about 40mW. Can anyone suggest me a high efficiency power supply circuit ( preferably greater than 80%) which can boost the output current to 10mA at the expense of the output voltage reducing to a minimum of 3V preferably regulated. Input power = 7
Hi, i think what you have here is one ic regulator with one transistor current booster circuit. However, the value of your ic is not given. I suggest you deside on what is should be, like say, LM317 and use 'Isis Proteus' to simulate your scematics. Cheers.
Hi all the attached is a booster amp used a gain boosted ota, from one berkeley student's project report. I don't understand why he used cascoded tail current source with one transistor controlled by biasing network and another by cmfb. Any particular advantage of this topology compared to normal cmfb tail current source (two parallel (...)
your question does not make alot of sense. You cannot boost both the voltage and current. For example If your 6V supply is capable of delivering 25AMPS - that is 150 Watts Power = Volts X current if you boost the said voltage to 12V, assuming 100% efficiency! the current available will only be 12.5AMPS. In practice it is (...)
i don't use heat sink.. coz i want it to be small.. if i use 2 7805, then one of the 7805 which drive the seven segments will the hot right? BTW what is current booster..? thx Its better if you use heatsink other wise any time the regulator will burn,, why dont you use 7 segment display from direct supply w
Hello, I have been thinking for a while to come up with a clever solution. I have a mini current source that produces around 0.5V. The output is in the order of ?A. I would like to boost the voltage to 1.6V. Can this be easily done?
Is their any booster IC which gives 5V and 12V output from single Li-Ion cell with current of 250mA from each ouput
Power OPs are basically available. Optimal respectively suitable solution depends on your application. A 741 with a current booster (npn and pnp power transistors) may be a simple solution without depending on special parts.
A darlinton transistor would have alot of current on the output How can i make a tube have alot of current on the output instead of alot of voltage? Mostly tubes preamps boost the voltage from input to output A transisstor boosts the current from input and out But how can i make a tube circuit preamp boost alot of (...)
can anyone tell me what is the best ratio between the current of the booster and that of the main amplifier? is there any paper or books about it please?
Take a look at the attached picture .. It shows the way of boosting the output current of an opamp with NPN and PNP transistors .. Maybe you should try that concept .. BTW> Why do you use LM311??? It is not an opamp - it is a comparator - so, in linear applications it is rather useless .. Regards, IanP
To test dynamic response and line /load regulation. In spice you can do this in several ways.Placing a current source at your output with a time delay is another way.The way I'm doing it here is how I've done it in the school lab. (see attacment) The settings on the VPULSE sources will depend on your particular application. This is a basic li
Increase current in your OTA, use minimum L, most important make sure no doublet in your frequency response UGF of your booster amplifier < 2nd pole of your total amplifier in closed loop configuration
try to lower mosfet input resistance by resistor connected to gate source . Or better to use low output impedance buffer (current booster) before mosfet . But what is the spike parameters - rise time, amplitute and others and type of mosfet you use?
a 400 ohms relay can not be driven by water resistance.waterresistance is above several kilo ohms. so you need to make a circuit like current booster, level sensor or buy a ready-made a controller called "sivi seviye rolesi"....
I need a circuit which can boost voltage and current from a low voltage and maintain it without fluctuations..could someone please help :)
Again, as in current booster1, the vale of the resistor is wrong .. it should be somewhere between 3-10Ω .. In this case current is limited by additional transistor, the 2N6049. It happens when the voltage accross Rsc riches ≈0.65V and this tranistor starts to control Vbe of the power PNP transistor .. Iout≈0.65/Rsc The (...)
This diode protects regulator against discharge of the output capacitor to the output of the regulator in case when the input is shorted .. see picture below .. Voltage regulators such as 78XX have internal current limit that limits the output current to 1A. If you need more current and still have a good voltage regulation you can use (...)
VVV: The regulator is working fine, without the current booster. The problem is, when I connect the current booster the BUT56A became short-circuited between Collector to emitter. Why you say that the BUT56A is not for this kind of application. I need to replace the tip30c for another transistor that can support more than (...)
Jetset The Tip30c and Tip152 form a current booster, in order to permit that the regulator can deliver more than 0.700mA. thanks
All the circuits show Transistor for current boost with 78xx 3 pin regulator. Why don't they use mosfet instead of Transistor.