sam.moshiri
- Jul 17, 2019
- 60
- Joined
- Jul 17, 2019
- Messages
- 60
Features:
- AC – DC Conversion
- Double output voltages (Positive – Ground – Negative)
- Adjustable positive and negative rails
- Just a Single-Output AC transformer
- Output noise (20MHz-BWL, no load): Around 1.12mVpp
- Low noise and stable outputs (ideal to power Opamps)
- Output Voltage: +/-1.25V to +/-25V
- Maximum output current: 300mA to 500mA
- Cheap and easy to solder (all component packages are DIP)
A double output low noise power supply is an essential tool for any electronics enthusiast. There are many circumstances that a double-output power supply is necessary such as designing pre-amplifiers and powering OPAMPs. In this article, we are going to build a linear power supply that a user can adjust its positive and negative rails independently. Moreover, just an ordinary single-output AC transformer is used at the input.
References
Source: https://www.pcbway.com/blog/technology/Low_Noise_Adjustable_Linear_AC_DC_Power_Supply.html
[1] LM317 Datasheet: http://www.ti.com/lit/ds/slvs044x/slvs044x.pdf
[2] LM337 Datasheet: http://www.ti.com/lit/ds/symlink/lm137.pdf
[3]: Schematic Symbol and PCB Footprint for LM317: https://componentsearchengine.com/part.php?partID=248007
[4]: Schematic Symbol and PCB Footprint for LM337: https://componentsearchengine.com/part.php?partID=290650
[5]: Altium Plugin: https://www.samacsys.com/altium-designer-library-instructions
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