Sylph-D200 TPA3255 Stereo (Ready to Run) Amplifier Module
Mid-power chip-based class-D amplifier with the best parts and optimizations.
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 remove the electro input coupling caps in the frontend audio path. The negative rail for opamp supply is being generated on-board with TPS7A ultralow-noise post regulator. Each opamp has a separate bulk capacitance on its positive and negative rails.
Includes transient voltage protection 62V 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 for improvement in 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 by the user through a solder jumper under the PCB.
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 Series or Panasonic FC series whichever is available.
1 pc Sylph-D200 stereo Ready to Run module.
6 pc female faston tab connector.
2 pc female 2.54 mm 3 pin connector.
Supply Voltage: 30V DC min to 48V DC max
Power (0.5% THD+N, 36V Supply): 35W-8Ω, 70W-4Ω
Power (0.5% THD+N, 48V Supply): 70W-8Ω, 140W-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 45V 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: 600g
Recommended Power Supply
- 36V DC to 48V DC
- Single supply SMPS 350W or higher.
- DO NOT use power supply with split rails.
- LRS-350-48 or SE-450-48
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