Sylph-D100 TPA3251 Stereo Amplifier Module (Ready to Run)
Mid-power chip-based class-D amplifier with sound improvements through optimization and careful parts selection.
The analog input can accept full balanced or single ended signals which can be configured by a solder jumper under the PCB. The output is 2 channel, stereo BTL configuration. Single ended input is enabled by default unless otherwise requested.
A split supply is used in the opamp buffer section in order to delete the redundant input coupling caps in the frontend audio path. The opamp rail supplies are being generated on-board with positive and negative post regulators. Each opamp has a separate bulk capacitance on its positive and negative rails.
Use of bulk capacitance in AVDD supply, and various tweaks to improve the sound quality.
Use of voltage supervisor IC to avoid large turn on-off pops or clicks.
Input coupling caps layout can accomodate to 7.5mm x 7.5mm, 5mm pitch poly caps.
Can be configured as a mono PBTL on post LC filter (requires rewire soldering the output).
1 pc Sylph-D100 stereo Ready to Run module.
2 pc female 2.54 mm 3 pin connector.
Supply Voltage: 24V DC min to 38V DC max
Power (38V Supply): 50W-8Ω, 100W-4Ω
Input sensitivity - SE (PFFB disabled): 1V RMS
Input sensitivity - SE (PFFB enabled): 2V RMS
Input sensitivity - Balanced (PFFB disabled): 2V RMS
Input sensitivity - Balanced (PFFB enabled): 4V RMS
Input impedance: 10K Ω
Input configuration: SE / Balanced (solder jumper)
Load impedance: 4Ω or 8Ω
Idle dissipation: ~6W at 38V DC
Footprint: 133mm x 100mm x 45mm (L * W * H)
Number of PCB Layers: 2 layer copper
Overcurrent /short protection: Yes
Over voltage protection: Yes
Overheat protection: Yes
Turn on-off pop suppression: Yes
Gross packed weight: 400g
Recommended Power Supply
- 38V DC Single supply SMPS 350W or higher.
- DO NOT use power supply with split rails.
- Mean Well LRS-350-36 adjusted to 38V
- Use 32V DC for linear supplies
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