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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
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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 measured is only super low 10mV level when output current changes over very big steps between 1A to 5A. Which means the actual dynamic output impedance is only 2.5mOhm (@1kHz). So the LinearPi Pro 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)
Standoff/Screw sets #34C (optional to mount UcConditioner or stack on top)
Note: To use an external on/off switch, the on-board on/off switch must be kept at off position.
