All Questions
17
questions with no upvoted or accepted answers
2
votes
1
answer
132
views
Output Capacitor Design for a Multiphase Buck Converter
According to this application note from Texas Instruments, in the design of the output filter for a multiphase buck converter there are basically two ways of choosing the output capacitor. The first ...
2
votes
0
answers
95
views
Is it true that power supply design is difficult when input voltage range is wider?
During power supply (buck converter) testing, I had seen the lowest efficiency values corresponding to highest input voltage. I thought if the design meets this worst case scenario, it should be ok no ...
- 3,032
2
votes
0
answers
329
views
Inconsistent Output Voltage in DC-DC Buck Converter
I'm trying to implement the following tps54302 DC-DC buck converter, for a 5V 3A output:
All resistor values 1% tolerance, capacitors 5% tolerance, inductor 20% tolerance.
I'm testing with a bench ...
- 21
2
votes
0
answers
371
views
Any specific precautions should be taken when using 2x AA LiSOCL2 batteries in parallel?
I am working on the wireless sensor design and one of the sensor is such that it needs to be kept ON through out the operation and it takes supply of 3V and current of about 100uA, which I think is ok ...
- 358
1
vote
0
answers
55
views
Boost converter output voltage drops
I'm using an MIC2251 (MIC2251-1YD5-TR) in a design to boost a lithium battery (3.6V-4.1V) to 5.4V for powering a small camera peripheral that requires a typical draw of 80mA. I expect that the worse ...
user220456
1
vote
1
answer
152
views
DC-DC converter circuit LM5164
I would like to build a DC-DC converter circuit using EasyEDA that can output about 80V from 7 Nissan Leaf battery modules that are about 55V nominal.
I am looking at the datasheet for the LM5164 and ...
- 339
1
vote
0
answers
80
views
Buck input decoupling capacitance and efficiency
I'm working on an high frequency buck (>10 MHz) and there's a problem with the input decoupling capacitance, the one used to filter battery harmonics and have a more stable voltage with less ripple....
- 61
1
vote
0
answers
76
views
Buck boost converter inductor rating
I am designing a buck boost converter with a 12v output, and 50A current output.
The input range is 8v-14v from a supercapacitor. However based on the Texas Instrument buck boost design sheet Basic ...
- 11
0
votes
1
answer
47
views
PMIC PCA9450B Not Working
The PCA9450B is utilized to power up the iMX8 Mini Processor chip, which incorporates multiple voltage regulators. However, I am experiencing issues with the output voltages on the output side, ...
0
votes
0
answers
59
views
Reduce voltage ripple in wall power supply and buck converters
For my project I choose a wall AC/DC power supply (AEJ160PS12) with output voltage at 12V and intend to use some buck converters to step down from 12V to 6V and 3.3V. The chosed buck converters is ...
- 29
0
votes
0
answers
31
views
PMIC MIC23451 operating voltage range
I am using Microchip SOM module in my project. Not using all the things in the SOM.
So we are redesigning the board with necessary components for my application.
Below is block diagram shows the main ...
- 2,593
0
votes
0
answers
58
views
Using 2 LiPo Batteries via 2 Buck Converters for External Notebook Power Supply - will it work?
I have an old ThinkPad X220T notebook of which the internal battery is broken (and removed).
To get my notebook working on the go again I want to build an external portable power supply with 2 LiPo ...
0
votes
0
answers
84
views
Absurd screeching from a buck convertor
I got a buck converter from Amazon. This- https://www.amazon.com/MCIGICM-step-down-Converter-3-0-40V-1-5-35V/dp/B06XZ1DKF2
Now it's soldered onto a custom PCB I designed. I'm supplying it with 12V and ...
- 11
0
votes
1
answer
46
views
Buck converter output power definition
I'm designing a buck converter to feed the following loads:
A control circuit 3.3V/100mA
A 80V solenoid which has a DC resistance of 300 ohms. This means a current of ~270 mA.
My plan is to ...
user115094
0
votes
1
answer
56
views
How to measure correctly efficiency at high load with LT8646
i'm trying to measure efficiency of a LT Part LT8646 at high load with the attached schematic.
i'm using a dynamic load and a power supply to give 12V. I'm using a digital multimeter to read the ...
- 11