Friends,
I’ve got some PCB’s left to built up an „Ultra Low Noise“ power supply, which I’d like to offer here.
It’s about LT3045 based PCB’s, so you can built up symmetrical (connected by a jumper) or separate power supplies, the PCB itself can be devided in the middle as shown on the pictures, so you’ll get two power supplies for different projects.
Up to 3x LT3045 can be used per side, which gives up to 1,5A per rail.
Output voltage is to be adjusted by using a potentiometer (up to 15V), I recommend to use a heatsing (up to 25x25mm per side).
I use the ps to power opamps in several devices and other designs, which are sensitive to power quality.
The PCB measures 50x68mm, 70um and is kept in beautiful white colour.
The Layout is used from the datasheet, you’ll also find all figures like noise etc there, please take a look to site 20 (parallel devices).
The BOM and the place plan will of course be published to all buyers. Because I did the PCB’s for myself, I don’t have a finished „HowTo“ yet.
If there's more interest, I could finish a small HowTo next days.
If somebody‘s interested, I have some LT3045 left, which can be bought for 5€ each.
International shipping should be about 3,70€ for small amounts, price per PCB is 12€
Contact me for any questions. If you’re intrested, please PM me.
Regards
Stammheim
Highlights taken from datasheet:
· Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz)
with one regulator, noise is getting lower using multiple regulators
· Parallelable for Lower Noise and Higher Current
· Ultralow Spot Noise: 2nV/√Hz at 10kHz
· Ultrahigh PSRR: 76dB at 1MHz
· Output Current per LT3045: 500mA
· Wide Input Voltage Range: 1.8V to 20V
· Output Voltage Range: 0V to 15V
· Low Dropout Voltage: 260mV
I’ve got some PCB’s left to built up an „Ultra Low Noise“ power supply, which I’d like to offer here.
It’s about LT3045 based PCB’s, so you can built up symmetrical (connected by a jumper) or separate power supplies, the PCB itself can be devided in the middle as shown on the pictures, so you’ll get two power supplies for different projects.
Up to 3x LT3045 can be used per side, which gives up to 1,5A per rail.
Output voltage is to be adjusted by using a potentiometer (up to 15V), I recommend to use a heatsing (up to 25x25mm per side).
I use the ps to power opamps in several devices and other designs, which are sensitive to power quality.
The PCB measures 50x68mm, 70um and is kept in beautiful white colour.
The Layout is used from the datasheet, you’ll also find all figures like noise etc there, please take a look to site 20 (parallel devices).
The BOM and the place plan will of course be published to all buyers. Because I did the PCB’s for myself, I don’t have a finished „HowTo“ yet.
If there's more interest, I could finish a small HowTo next days.
If somebody‘s interested, I have some LT3045 left, which can be bought for 5€ each.
International shipping should be about 3,70€ for small amounts, price per PCB is 12€
Contact me for any questions. If you’re intrested, please PM me.
Regards
Stammheim
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Highlights taken from datasheet:
· Ultralow RMS Noise: 0.8μVRMS (10Hz to 100kHz)
with one regulator, noise is getting lower using multiple regulators
· Parallelable for Lower Noise and Higher Current
· Ultralow Spot Noise: 2nV/√Hz at 10kHz
· Ultrahigh PSRR: 76dB at 1MHz
· Output Current per LT3045: 500mA
· Wide Input Voltage Range: 1.8V to 20V
· Output Voltage Range: 0V to 15V
· Low Dropout Voltage: 260mV
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Hi Theodosis,
That's right. The schema above is placed twice, two separated rails, both adjustable independently 🙂
Regards
Stammheim
That's right. The schema above is placed twice, two separated rails, both adjustable independently 🙂
Regards
Stammheim
Hi Stammheim,
wrote you an email, I'm in with one board. I had exactly the same idea a few weeks ago, but couldn't find the time to design the boards yet. The only difference I had in mind is to spend a second pot for the current limit function, as well as using Vishay precision pot:
I have already 7 segment panel volt and current meter on my desk for that purpose:
Now you have been fastern than me and I can save that time and spent it on another project.
-branadic-
wrote you an email, I'm in with one board. I had exactly the same idea a few weeks ago, but couldn't find the time to design the boards yet. The only difference I had in mind is to spend a second pot for the current limit function, as well as using Vishay precision pot:
I have already 7 segment panel volt and current meter on my desk for that purpose:
Now you have been fastern than me and I can save that time and spent it on another project.
-branadic-
HowTo and BOM are finished, so it should be easy for everyone to understand!
Because I was asked to finish also boards for less experienced users, I also offered boards with fully published LT3045 (6 pcs per board) for 82€. That's a few bucks more, but soldering the little guys isn't easy, on the other side the function is checked, one only needs to populate other parts, 0805 and bigger.
Because I was asked to finish also boards for less experienced users, I also offered boards with fully published LT3045 (6 pcs per board) for 82€. That's a few bucks more, but soldering the little guys isn't easy, on the other side the function is checked, one only needs to populate other parts, 0805 and bigger.
I was examining this and the LT3045 datasheet. I would expect that the chip outputs will be all connected together - so just a dot missing in the circuit diagram?
Oh yes, there is just a dot missing. Yes, the 3 LT's are connected together.
@szczemirek
Thanks, I'll pm you...
@szczemirek
Thanks, I'll pm you...
Because sometimes a single power supply is needed, I created a single version of this LT3045 board.
Measures are the same, few parts changed to meet the needs... ultrasoft and ultrafast diodes, polymer capacitors at the output.
So 6 parallel LT3045 working makes 3A, the footprint is modified for easier soldering. Still adjustable from 0-15V output voltage.
A great ps to power several devices like DAC's, preamplifiers or small amps or headphone amps.
Single and Dual boards are available for 12€ each.
For less experienced users the presoldered version (with 6 LT3045 published) is available for 72€.
The completely finished and tested boards are also available:
Dual ps: 132€
Single ps: 138€
Measures are the same, few parts changed to meet the needs... ultrasoft and ultrafast diodes, polymer capacitors at the output.
So 6 parallel LT3045 working makes 3A, the footprint is modified for easier soldering. Still adjustable from 0-15V output voltage.
A great ps to power several devices like DAC's, preamplifiers or small amps or headphone amps.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Single and Dual boards are available for 12€ each.
For less experienced users the presoldered version (with 6 LT3045 published) is available for 72€.
The completely finished and tested boards are also available:
Dual ps: 132€
Single ps: 138€
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I'm interested in a finished board too. Please PM me to send me further details on how to buy this. Thanks!
Voltage drop of the LT3045 is very low
What input Voltage is needed for 12Vdc and 5Vdc output with these boards?
I might go for custom made transformers
What input Voltage is needed for 12Vdc and 5Vdc output with these boards?
I might go for custom made transformers
Hi Shutdown,
Sorry for late response, I usually watch out for pm's 🙂
Yes, voltage drop is very low, but remember ripple which increases with heavy load. So if you want to keep the heatsink cold and need only few mA, 1V DC might be OK, if you need full power, 12V AC might be good for 12V DC.
If you have an oscilloscope just try it out with different load.
Regards
Stammheim
Sorry for late response, I usually watch out for pm's 🙂
Yes, voltage drop is very low, but remember ripple which increases with heavy load. So if you want to keep the heatsink cold and need only few mA, 1V DC might be OK, if you need full power, 12V AC might be good for 12V DC.
If you have an oscilloscope just try it out with different load.
Regards
Stammheim