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34 Threads found on Buck Regulator Design
It is feasible to drop 3V with a transistor or IC regulator. However you waste 15W at 5A. To have efficiency you're probably looking at a buck converter. Although your output spec is 4A or 5A max, the inductor may have waveforms with peaks upwards of 6-8A going through it. It gets complicated when you want to regulate output voltage, and at the s
hi, This is an example of the unit you require. What is the wattage of the solar panel.? Clip from link. Features: Size: 52mm x 38mm x 15mm(L x W x H ) (with fixed column) Input:
A better Bang for the buck (intended pun) is to design a low voltage drop linear regulator after the buck SMPS which maintains the constant low voltage drop, while the linear regulator minimizes the ripple and has the benefit of current limit control down zero with wide BW ripple rejection and low step-load (...)
Hi all, Due to a sudden change in design requirements with regards my circuit supply voltage I'm looking to change my voltage regulation on my circuit from the classic LM7805 linear voltage regulator to a switching/buck regulator. This is my first time attempting to use switching regulator so apologies (...)
At this current and power level, you should look to use a switching regulator. These usually work as buck converters. You can choose a specialized buck controller and use it as the main controller in your converter. You may use general purpose PWM controllers like SG3525 or UC3842. You may even use a readily available (but rather expensive) (...)
A lot of power is dissipated by the linear regulators. So, you could use DC-DC buck converters/regulators (switching) instead of linear regulators. You will gain better efficiency and thus lower heat. For the 3.3V, you can use L4971 (taking input directly from 12V). For 5V, you can use LM2576, L4960, L4964, L4972, (...)
Hi all, I'm currently designing a device which will run from an automotive 24V battery on a running vehicle (up to 29V when charging). The device will include a UHF radio module (0.5W Tx power), a microcontroller, a reed switch and a few LEDs. The radio and microcontroller run on 5V. Usually I would use a simple LM7805-type linear regulator fo
Current Mode buck regulator Basic Architecture ---------- Post added at 11:21 ---------- Previous post was at 11:20 ---------- DC-DC Converter Tutorial - Maxim
Hello Now I am thinking about synchronous buck converter. In low side gate driver, It seems to be easy but real design is not. How to supply the low side gate driver block if the VCC is over 12V Low side gate operating voltage is 5V.... First I tried to design 5V regulator. But not enough capacitance. ( No space (...)
Greetings people. 1) I need a suggestion for a good book that focuses mainly on buck regulator design, single and multi-phase and with good explanation of type-ii and type-iii compensation. 2) I am trying to understand a simple buck regulator's loop stability with a type-ii or type-iii compensator, not (...)
Any simple buck converter might do the job. Just take a look at National Semi Website. They got the WEBENCH tool that will do the design for you... I belive this current wont be a problem with 80% eff design.
I'm designing a FPGA board and i need to supply 1V at 1Amp for the core .Now i have a ldo 1 V 300mA regulator inside a dual buck converter chip that i use in the design feed by 4 v input .I wonder if is a good idea to boost the current of this 300mA LDO regulator to 1 A with a PNP transistor .I'm so afraid (...)
I have a simple synchronus voltage mode PWM buck regualtor 5V to 2.5V design with load at 2.5A, it operates in CCM and it's stable. However, when the load is reduced to 250mA, the regulator is operating in DCM and it's unstable. Anyone know why and how to solve this issue.
Does anyone know any book or paper that explains digital control of switching regulators (buck)
hi to all, sorry if i'm in the wrong topic cuz i'm new to this.. i just want to ask.. can i design a buck-boost chopper that will convert the input voltage of 240vac to 230vac?
Hi all, I need to design a voltage regulator for a photovoltaic system array (shown in the diagram). Where the voltage source represents the photovoltaic array, R1 (resistor) represents a LED array, and the rest of the circuit is a buck-Boost DC-DC converter and please ignore the MOSFET and diode specifications that are on the diagram (...)
we are designing a battery charger from a solar panel. we have a power path battery charger which requires an input voltage of about 5V. in this case, we need a buck boost converter with min Vin of maybe 0.3-0.8 and max Vin of maybe 6V (since that is the highest voltage our flexi solar panel can generate). Maybe you have encountered a (...)
hi i am making a buck regulator that convert a regulated 375 V DC acquired from 220 ac by a certain pfc circut to 50~175 VDC & i have used UC3844 current mode PWM ic level of output change by a potentiometer (volume) in feedback loop losses in mosfet switch is high whatever i can,t compensate it by RL shunt snubber &it add many troublesome dif
Is it the same as charge pumps/doublers...I am interested in a step-down(maintains output at 1/2 or 1/3 of the input...for a wide range of input)regulator using sw-cap design...not using inductors(i mean not the buck)...with very low ripple What are the adv over the LDOs and buck regs? Is there any good book for this (...)
I was thinking of designing a MOSFET buck high voltage regulator with: Input of 70V and output of 20V and load current of 0.5A I designed a circuit using a darlington BJT transistor to buck the voltage to 36V and regulate the voltage to 20V using a LM317T. It seems the linear voltage (...)
Hi saurav_sdpl, If you need non-inverting buck boost regulator, you can refer to the chip datasheet of tps63000, LTC344x and LM3668. Hope it can help you. Edwin
Hi, I am designing 5-3.3V/2A buck regulator. My controller is having internal reference of 1.3V. I see switching noise is reflecing on the input due to which my reference is not constant. Also i see lots of noise at feedback network. Feedback is simple resistor divider n/w with capacitor in parallel with top resistor. i/p cap - 250uF (...)
Hi, Use the LM2677 its a 5A SMPS buck regulator and has an internal MOSFET so only need some resistors capacitors and a coil !!... Look on internet or national for datasheet.
Hello, I have discrete buck regulator (12V to 5V) in my design. PWM switching signal is generated from microcontroller. To drive high side MOSFET (P/N) i would like to use TPS2818 gate drive IC. My controller works on 5V. Can i feed this PWM to TPS2818? Can this generate proper drive for high side MOSFET? Niks
How to design the gain and bandwidth of buck regulator? THX!
see this site for other ICs that could be used as a buck regulator I hope it could help you.
Hi to all, Can I find out from the experts reading my post on how to design a average current mode control PWM buck converter? Thank you and I hope to hear from you soon.
Assume you have to design a buck regulator. You have established the frequency (or it's fixed, such as for some integrated regulators). Then you need to select an inductor. You find the right inductance, but how do you know if it will not saturate when driven? In other words, how do you know the inductor can store the (...)
inductorless is charge_pump design look your PDF file use 2 cap .. another interesting is 1 inductor have many output Ti have this pattern "single inductor multi output " for charge pump , fast clock is small outside Cap and you must use 2 section , 1 is buck (Vo < vin) 2 is boost ( Vo > vin) use charge pump can provide 10~ 50ma d
I am design a switching buck regulator.Did anyone know how to choose the L and C design paramemter?? Have any formula to describe these values?? Thank you
Do you need to breadboard the buck and you want to know how to test it? Or do you need a board with the necessary circuitry to test a buck that you've already built?
You can use a buck regulator, something like Fairchild FSD210. I use one to step 450 volts down to 12 volts at 120mA. But be aware that this is a non isolated supply and any interfacing to the circuit is done through magnetic or opto couplers and a safety barier.
Dear all: Does any body know how to design ""current sense amp " in thr buck regulator , Now I use external Power MOS (PMOS and NMOS) . so that I don't how to detect the current ? and How to do the ramp compensation ? Does anybody know that ? Any document ? Thanks
I need to design a power supply powered by 9V cell battery to provide a +/- 6.5V dual polarity power supply with max. load curent of about 1A each rail. Is it possible to apply a National buck regulator IC to implement this? If so, how to implement? Or could you suggest me a schmetic for this with selection of passive components in (...)