Questions tagged [switching-regulator]
It's a type of voltage regulators that rapidly switch a series device on and off.
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Boost converter gets hot
I'm building a LCD backlight power supply boosting 5 V to 12 V.
The max current draw from the panel is 12 V 0.4 A.
I am using LMR60214. But the IC is getting hot to touch at full brightness.
I am ...
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Buzzing ringing in boost converter regulator when using PWM in lower duty cycle
I designed a boost converter using TI LMR62014XMF, to convert 5 V to 12 V for using as backlight source in my LVDS display adapter.
The LCD display panel needs 12 V at 0.5 A max for backlight driving.
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Could you provide feedback on my LTC2954 and TPS61090 Schematic?
I am a hobbyist diving a bit deeper into designing more complex PCBs. In the past, I have created basic ESP32 based 2 layer PCBs with basic LDOs for supplying power. I am currently working on a more ...
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Using Linear Voltage regulators in parallel for a high current load
I need to build a high current 12 to 5 volt regulator.
This will power neopixels, which draw 60mA each, and we have like 800 of them, so around 48A when all of them are on at full brightness and white....
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Overvoltage protection for ESP32 (3v3)
I am trying to desing a switching regulator power supply for esp32 s3 (3v3). this is my schematic, I am using PAM2310 for switch regulator. I have tested it works fine. But sometimes I am thinking, ...
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Should I consider using two Switching regulators or one switching regulator and a linear regulator
I have a circuit that has an input of 24VDC. The circuit has two different voltage rails requirements. 12VDC @ 0.1A and 8VDC @ 1A. I have decided to use a swithching regulator from 24VDC to 8VDC, and ...
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Better to choose a switching voltage regulator or a fixed voltage regulator
I am designing a circuit which has a 24V input. The circuit however uses 8V and 12V supplies. This whole circuit requires approximately 1A.
I have decided on using fixed voltage regulators that give ...
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Switched capacitor DC-DC converter [duplicate]
Switched capacitor DC-DC converters are often used for low power applications (low output current) while inductor based DC-DC converters are preferred for high power applications.
I've come across ...
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TPS61178 Input Current Limit
I am working with TI TPS61778 and the title of the part says it has a 10 A switch current. This is all fine and dandy but in the electrical specifications, we see that for a RLIMIT of 80.6 k we have a ...
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Design procedure for switched capacitor dc-dc converter
I am looking for some references to design a switched capacitor dc-dc converter, however I could hardly find any reference online.
I am aware that the design method depends on the actual topology of ...
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How much current should a switching regulator consume on its own?
With your help on stack exchange, I finally finished assembling my first LM5143QRHARQ1-based buck converter! And it works! It does output 7V (well 7.03V) The only problem is that it consumes around 0....
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Varying negative voltage from a switching regulator
I've looked up switching regulators with inverting configurations that can give a varied output by setting feedback resistance. Now I want to vary this voltage through a uC.
I didn't find any digital ...
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Constant Voltage Spikes in a DC-DC Switching Regulator
I've been developing a low-voltage ripple dc-dc converter (36V to 5V) based on the LMR16030PDDAR to power a sensitive analog video transmitter. When a load is connected to the output, I get a really ...
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Buck / Buck Boost converter as a regulator or rectifier question
I have an older boat with a rectifier like https://www.ebay.com/itm/282755134541 . I understand that these will output 14-17V+ DC. With an increase in RPMs, I understand that the DC voltage increases. ...
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How to pick an inductor for the LM2576 when not using the recommended options from the datasheet?
I am selecting an inductor for the LM2576HVT-15. The datasheet has some recommendations, but the only recommended options are inductors that and relatively big and have exposed wires. I do not want a ...
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Is the PCB routing for this LM5143A-Q1-based buck converter right?
Thanks to your advice on StackExchange, I'm in the final stage of developing my first LM5143A-Q1-based (link to datasheet) buck converter! It may be a bit rushed as I need to prepare this for a high ...
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Final design considerations for LM5143A-Q1 buck converter. Are these features needed?
After a few days of learning how to make a buck converter using the LM5143A-Q1 TI IC, it's finally becoming a reality! This is the final design, highly inspired from page 30 in the datasheet, some ...
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Shielding Buck Converter
I have a simple question, and I want to ensure that nothing unexpected happens. I'm currently working on a Raspberry Pi-based robot project with a Pi camera, and I plan to power it with a battery, ...
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How to choose the right type and values of capacitors for LM5143A-Q1 output?
While learning and trying to make my first buck converter using the LM5143A-Q1 (datasheet link) from TI, I calculated the required capacitance at the output for the IC to be able to output 31A, which ...
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How to choose the right inductor for buck converter with LM5143A-Q1? (from TI)
While working on my first voltage regulator circuit I got stuck at calculating the inductor value... The IC is LM5143A-Q1 from Texas Instruments, and according to the datasheet, the formulas for ...
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How to put the LM5143A-Q1 IC in voltage adjustment mode? (From Datasheet)
I'm trying to make my first voltage regulator circuit using the LM5143A-Q1
Buck IC. The datasheet does include examples and all the values required to get the 3.3/5V fixed output, but it barely has ...
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Are there any extra steps I can take to prevent noise on the output of this circuit?
I made a rectifier/boost converter PCB board in order to power a USB type-C charge module. The USB charge module will solder into the output posts on top of my board. And, since the charge module ...
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Do I need to match the ESR for the components on this schematic and how?
I'm using this schematic given to me by the TI power designer tools and the passive components all have ESRs attached to them. Do I need to make sure my components have these ESRs to get the desired ...
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Buck Converter - Lack of current transfer with a higher voltage output
I have a custom buck controller operating on an input voltage range of about 5-30V and output of between 0-5V. The input current can only be around 500mA or the input voltage sags. The PWM is 160KHz ...
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How to increase a DC nominal voltage or switch for 12 V feedback with a 60 mV to 150 mV activation DC voltage? [duplicate]
Currently doing a project whereby a 12 V DC signal is sent from a secondary device with a voltage switch designed to then allow the 12 V signal to be returned activating the secondary device. ...
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Stability with phase dip
In https://www.analog.com/media/en/technical-documentation/data-sheets/13756fd.pdf referring to this figure
it says
Why is this not a problem? My reasoning would be: phase gets close to 0°, so the ...
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Which topology of power regulator gives a stable voltage output, linear or switching?
I am experimenting on the stability parameter of switching vs linear regulators. By stability I mean how much the output voltage ripple is changing.
A lot of online reading has made me understand that ...
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Why use a DRV2700 high-voltage piezo driver in this application?
The DRV2700 from Texas Instruments is an integrated circuit for driving piezoelectric/capacitive loads at relatively high voltages (max. +/-100 V) while the supply voltage can be as low as 3.3 V. This ...
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Switching regulator Design
I am designing a switching buck converter from 7.5V to 5V using the AP62200TWU-7 converter.
This converter operates at fSW=750kHz Switching Frequency.
The required output current is around 0.5A.
using ...
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Power traces for switching regulator on PCB
When designing a PCB that has a switching regulator IC, is it better to have the power traces to the IC wider or narrower?
I read that the general rule of thumb is to keep the traces as short and wide ...
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LMR16030 only works when input <35V, explodes or burn if more
I'm designing an switching power supply that requires to have multiple sources of voltage.
When the LMR16030 is on Lifepo4 24V battery pack, it runs perfectly fine and provides accurate voltages for ...
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Are there any problems to expect when you add a MOSFET to a DC/DC converter to add PWM modulation for LED brightness regulation?
I need to power LEDs from a solar powered setup with a 12V battery, around 25W of power.
I want to be able to dim the LEDs using a microcontroller.
I was not able to find a reasonably priced DC/DC ...
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Current regulation compensation SG3524 and right place to place sense resistor
What is the right place to place current sense resistor? As in picture we get traingular wave n position 1, sine wave with highest amplitude on pos 2, smaller sine wave on pos 3 and nearly flat line ...
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Switching regulator: load DC current
Why should in a buck converter the average voltage across the inductor be equal to zero to have a DC current?
Could someone help me understand this in a simple way by mathematical equation?
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Short circuit instance with a switching regulator
I am currently working on a receiver circuit for a wireless power transfer system. I made a basic full bridge rectifier with schottky diodes before.I thought of changing the diodes to a FBR IC and ...
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Can the MP9488 circuit be operated at 333mA output current?
I am looking to use the MP9488 as a buck Switching Regulator with a voltage output of 12V and output current of 333mA. In the application note it has an output current of 300mA.
As far as I understand ...
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Power Good Connection for Regulator Sequencing
For powering Artix 7 FPGA I need power sequencing. In the Artix-7 data sheet it states that the recommended power-on sequence is VCCINT (1.0 V), VCCBRAM (1.0 V), VCCAUX (1.8 V), and VCCO (3.3 V). ...
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I need help identifying an IC marked LDBX - N504 - 108
DISCLAIMER
I'm not an engineer
DISCLAIMEREND
I'm trying to repair a custom PCB that runs a controller for a Tesla coil. All controller functions are operated by a CY8C58LP PSoC.
Link to datasheet for ...
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Current and voltage value before inductor pin in buck converter
In buck converter we know that pure DC current will be after inductor pin. But what will be the current/voltage value before it.
Let’s take an example, the buck converter circuit with 12 V input to 3....
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Why does the LM2596 have 1.23V reference voltage instead of 1.235V?
According to the functional block diagram below.
I know it is not much difference, just 0.005V but if it was 1.235V it should say it.
Maybe I'm understanding something fully.
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MC34063 output voltage rises with current draw
In my current project I implemented two MC34063 switching converters to provide a 3.3V and a 4V rail. Testing the converter circuitry I found some odd behaviour.
Unloaded I get a solid 4.0V, but when ...
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MAX1771 Circuit not boosting until manually forced
I've designed a circuit for boosting a Li-ion battery (3.3 V - 4.2 V) to 12 V. I am using the MAX1771 IC and one of the schematics shown in its datasheet. I've designed it to support a maximum current ...
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What are the consequences of using a small bootstrap capacitor?
I ordered the wrong bootstrap capacitor for a LM2677S-5.0/NOPB regulator. They recommend a 100 nF cap, but I ordered 10 nF.
What are the consequences of using the smaller value?
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How can I power an ESP32 with a 54V battery using a buck converter?
I need to power an ESP32 board from a 54 V battery. For that purpose, I understand that I need to step it down to 5 V so I need to design a step-down buck converter.
I tried the following circuit ...
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Why are switching DC/DC regulators so constrained on input voltage? How can I manage drops from higher voltages?
I'm looking to generate a stable 5 V and/or 12 V output from a DC input that could be up to 120 V. Inspecting the Farnell range at least, with no filters, the greatest DC input voltage is 75 V. How ...
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Can anyone see why I'm killing my buck regulator?
I've tried hard, but I can't figure it out. The buck regulator runs for about about 1 s and then it dies with the buck regulator shorted to ground.
The LDO is working fine. If I power the LDO with 5.5 ...
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Switching regulator becoming unstable as voltage increases
I have a circuit which includes two back-to-back switching regulators. The first is used to take the input of 14 V to 5 V and the second charges a 2-cell lithium battery.
I have verified the problem ...
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Switching regulator circuit failing
I have a voltage regulator circuit which keeps failing. It is based around a switching regulator. It takes 14V input from a variable voltage regulator (lab setup) and outputs 5V. I see 14V on the ...
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How can I calculate these capacitor values?
I’m trying to build a fan controller. My power source is a +24 V battery which is commonly used in cars.
I want use a regulator module (buck step-down regulator based on the CN3903).
This is my ...
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Reduce DC voltage via simple passives BUT as input to DC-DC converter
I have a bunch of cheap buck (I think) converters that do 6-20V input and 5V output; and I want to use one powered by a 24V PSU (this is for a 3D printer).
The current draw of the 5V system should be ...
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