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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)
can i design a buck-boost chopper that will convert the input voltage of 240vac to 230vac? Basically yes. Consider two H-bridge inverters (one for input and one for output) and a DC bus. That's the design for a bi-directional converter with sine input and output, simplified implementations are possible. Apart from a lot of po
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 (...)