Sylph-D200 TPA3255 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.
Includes transient voltage protection SCR which will fail short in overvoltage scenarios*. TVS diode for power supply surge protection, and will normally fail short when an accidental reverse polarity is applied. (*requires power supply with OCP)
Use of oversized capacitors and resistors for the zobel network to ensure reliable operation in PFFB mode.
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.
The board has a passive PFFB configuration (similar to SLAA788A). PFFB is disabled by default and can be enabled/disabled through a solder jumpers.
Input coupling caps layout can accomodate to 7.5mm x 7.5mm, 5mm pitch poly caps.
Capacitor for PVDD is either United Chemi-con KZN / KYB Series or Panasonic FC series whichever is available.
1 pc Sylph-D200 stereo Ready to Run module.
2 pc female 2.54 mm 3 pin connector.
Supply Voltage: 30V DC min to 51V DC max
Power (48V Supply): 80W-8Ω, 160W-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: ~7W at 48V DC
Footprint: 150mm 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: 500g
Recommended Power Supply
- 48V DC Single supply SMPS 350W or higher.
- DO NOT use power supply with split rails.
- Mean Well LRS-350-48
- Use 44V DC for linear supplies
- Up to 51V DC SMPS can be used at the expense of higher idle heatsink dissipation
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