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LinearPi Pro high-current ultra-low noise Linear power supply full SMT
LinearPi Pro high-current ultra-low noise Linear power supply full SMT
Introduction
LinearPi Pro is a new generation top-quality high current ultra-low noise audiophile grade linear power supply. It can deliver up to 5A continuous output current at extremely low-noise level which is much suitable for Raspberry Pi 5 and other high current noise sensitive applications. It could be the best linear power supply solutions for both digital and analog audio applications.
Multiple LinearPi Pros can be grouped into a big power supply system. LinearPi Pro can also be upgraded to an 5V/3.3V ultra capacitor power supply by integrating with UcConditioner/Pro for even lower noise performance.
LinearPi Pro New Features
• 5A high continuous output current.
• 2.5 mOhm ultra-low output impedance.
• New parallel power output stages architecture.
• 4 layers double copper thickness PCB for higher current density and additional shield layers.
• 29080 uF total filtering capacitance.
• Enhanced Kelvin sense input to lower the output impedance and improve performance.
• Actual noise level superior to LinearPi MkII because of the shield layer and the new parallel architecture.
• New low drop high speed high current soft recovery Schottky rectifiers.
• Bigger size heatsink
Other Specifications and Highlighted Features
• 0.8uV Ultra-low noise level.
• Built-in ON/OFF control logic with on-board or possible external ON/OFF control switch.
• Multiple LinearPi Pros can be grouped into a big power supply system by making use of the built-in isolated master/slave on-off control signal chain.
• Seamlessly integrates with UcConditioner/Pro to be upgraded to an ultracapacitor power supply.
• Optimized for continuous AC input mode to get best possible sound quality.
• Deal with MLCC piezoelectric effect noise.
• 5V, 3.3V and 12V configurations.
• Two stages ultra-low noise soft start up feature great for both digital and analog application.
• Fully SMT high-quality heavy-duty design.
Great Load Transient Response Measurement Result
Real measurement shows that the LinearPi Pro has a super great load transient response performance. The output voltage drop is only 10mV at ultra-low noise level when output current changes over very big steps between 1A to 5A. The actual dynamic output impedance is only 2.5mOhm (@1kHz), which could be the best performance among all the low-noise linear power supplies in the market.
Load current steps: 1A to 5A, Output voltage: 5V
Frequency: 1kHz, Duty cycle: 50%, Probe: 1:1, 10mV/DIV
Upgrade with a UcConditioner Pro to make an even more improvement to the low-noise performance
It’s highly recommended to enable the enhanced Kelvin sensing function when working with a UcConditioner Pro
Difference between LinearPi MkII
LinearPi |
LinearPi Pro |
|
Rated constant Output current |
2.5A |
5A |
Total filtering capacitance |
13640uF |
29080uF |
Architecture |
Single power stage |
Parallel power stages |
PCB |
Two layers double thickness copper high current PCB |
Four layers double thickness copper high current PCB with two additional shield layers |
Ultra low Noise |
0.8uV RMS rated |
0.8uV RMS ratedActual noise could be even lower because of the parallel power output stages and the additional shield layers |
Heat sink |
15X50X50 mm |
25X50X50 mm |
Schottky rectifiers |
High speed |
High speed, ultra-low drop |
Transformer recommendation chart
Voltage configuration |
Working average current |
Transformer P/N (or equivalent) |
3.3V |
0 - 5A |
1182Q6 |
0 – 2.5A |
1182N6 or 1182L6 |
|
5V (default) |
0 – 5A |
1182Q6 |
0 – 2.5A |
1182N6 or 1182M9 |
|
12V |
0 – 3A |
1182M12 or 1182P12 |
0 – 2A |
1182L12 or 1182M12 |
Dimensions and other documents
External ON/OFF switch (optional, sold separately)
Note: To use an external on/off switch, the on-board on/off switch must be kept at off position.
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Super impressed with the quality this is my first purchase from Ian Canada, but it won’t be my last. Thank you for providing a great service.!