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16 Threads found on Battery Power Regulation
Had you measured the Vpp voltage drop at the 12v power supply ? I mean, how much of that peak is due to the lack of regulation at the source? I presume that the remote 12v comes from a battery, right ?
We may sugest, that your USB battery gives you 5V 1A power. After step-up converion we can expect for 300mA max and 200mA in real conditions. So, it should work, but don't expect high efficency because USB battery already has 3.2-4.2 -> 5V step up converter.
Li-Ion is best choice for power density, capacity. NiMh is cheaper. SLA are cheapest. cost is usually inverse with ESR and proportional to Ah capacity, which affects load regulation voltage. Some cheap Chinese no spec LiPo batteries may seem to be a bargain, until you discover flaws which affect life cycle limit from temperature rise, but LiPo f
Do you want to make a device similar to the power Bank that steps up the 3.2V to 4.2V voltage of one 18650 cell to a regulated 11.1V so it can power a laptop? If the cell is 3000mAh and its voltage is the average of 3.7V and the stepup is to 12.6V (the extra 1.5V is for regulation) then the mAh is reduced to (3.7V/12.6V) x 3000mAh= 881mAh (...)
is it safe to charge a 12v lead acid battery with 16v?
Regarding the design of the inverter, assuming that you're using a 50Hz transformer to step up, the stages are: PWM controller power MOSFET driver stage power MOSFET stage Output regulation / feedback stage Additional features - battery low cut, overload protection, short-circuit protection, etc As for the PW
Hello, I have to make a power supply which must provide Vout = 10V and Iout = 15mA Vin is a 3v6 battery. The chief engineer asked me how i would do i said i would either use a monolithic boost converter or a charge pump. ...but the chief engineer replied that actually i should use a bias power supply based on a "relax
hey all i made a logic circuit contain cmos 4011,4071,4009,4010 ics 3 transistors bd139 buzzer ans 2 motors 1.5 v (motors which in toys) and the battery is 9v across regulation with 5v the problem : when i running the circuit , the power consumption of the battery is very high and the battery (...)
HI Friends; Can any one please help me to make a battery charger?? I wana make a battery charger for two 12V dry batteries connected in series in my power supply to provide backup to load. NOW: please tell me in general 1) how much voltage should i give to battery to charge. 2)should the voltage be continuous (...)
I guess if you correctly limit current sourced by battery, you will not only protect zener diode but also battery itself. There should be an intermediate stage between battery and diode (might be as simple as a resistor) to adjust voltage and limit power dissipation. For Spice, do you use a general model or specific (...)
I'm currently working on a wireless battery charger circuit.I need some help figuring out why I have a particular problem and any means of solving it. In the attached simplified schematic, you will see a PLL controlling pulsed charging of a battery which is powered by a class E supply, regulated and through a buck boost to keep voltage (...)
I wouldn't trust anything to do with motorcycle ignition systems. Some older bikes I had, had no regulation other than the battery itself - if the battery is resistive or the spike is fast, no particular control of voltage. I'd use a fixed output voltage regulator for the power feed, and divide down the (...)
Hi! The attached file is a schematic of 50KHz SMPS power supply which uses 325 VDC (after rectification of Mains 240 V). The required current for charging Lead Acid battery is approx 20 Amperes. Please give comment if any modification in the circuit is required. (note: isolated 12V DC is used for control circuit) Voltage regulation is not (...)
what kind of HW HW have many areas power mangement , RF , basedband , audio interface and so on if rf u will be asked about matching , SAW compoents , TXRX architectures and so on power managment : battery charing , power control , supply regulation and decoupling khouly
317 voltage regulator is not a very good choice for battery based applications. You will be loosing alsmost 50% of battery power into heat on this linear regulator. Much better option will be a switchmode step-down dc/dc converter such as LM2572ADJ (adj stands for adjustable): (free samples option) I
Hi all. I am designing a 1KVA, 12VDC to 220V RMS AC, Sine Wave digital power inverter. It should be low cost, Sine Wave (PWM) design with good load regulation. Extras like pulsed battery charging are welcome. Any suggestions?