I constructed a power supply that steps down a 12v dc to ~3 to 3.2v dc.
Resistors are 1/2 watt
load: EL wire and driverload current: 0.18Aload voltage: 3.2VRegulator current: 0.19A (with load)Vin = 12.7v (full charged lead acid battery)Vout = 3.2vMeasured…
I am trying to get analog voltage with AD5242 and LM317. I get both the ICs working seperately but when I use the resistor value I created with AD5242 on the LM317, it doesn't work as expected. I increase the resistor value step by step from 100R to 10K…
Whilst my area is really inductor based power supplies, I thought you may be interested in the article here: http://www.tnt-audio.com/clinica/regulators2_impedance1_e.html This looks at the impedance of the LM317 across frequency and the anecdote at the…
Radovan -- I'm glad it works with load, hope your final board does fine.
David -- The LM317 would be nearly as efficient -- 6 volts drop out of 30 works out to 80 % vs. 90 % for the switching regulator. I'm wondering if the ADP2442 would better handle…
Is it possible to use LT3032 in a floating design similar to LM317 and LM337 by using diodes? I need low current, low noise positive/negative voltage regulators which can work around 55V-60V region (both positive and negative inputs.)
If you really need low noise (<2uVrms or even <20uVrms) then the LM317 will not be able to achieve that.
Most LM317 have noise levels of 50-100 times per volt or 1000x the noise if you are trying to generate 12V.
Could you use the ADP7118 or ADP7142…
Thanks. The 12V is coming from an LM317 regulator. The answer to "when" depends on the rise time of the input 24V feeding both the lm317 and the LTC3705. I agree that it was a dumb decision to not use the standard MOSFET solution on this board. The problem…
Hi,
The complete design is to big to add and we can not share is. Here is a screenshot of the device. They are powered by LM317/LM337 regulators which are powered by a switcher (Traco TEN 5-2423). Chip decoupling 100nF//10uF.
The input current when…
Hello Anne,
I use the original SPI-library from Arduino. I have attached my source code. If I select both channels, CFTW0 is not written correctly. Otherwise if I select only one channel, it's correct. Nevertheless there is no output in both configurations…
Hi Zack.
I am using the LTC4015 with plain satisfaction. More then 1000 boards are working and stable.
Solved/clarified all the doubts about this and that.
LTC4015 is working with 12 cells Lead_acid battery and in "hardware" mode (CHEM0 and CHEM1 are opened…