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Schottky Rectifier Power Supply Board Single Bridge 120A 10000uF for DIY Speaker Amplifier
Schottky Rectifier Power Supply Board Single Bridge 120A 10000uF for DIY Speaker Amplifier
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Schottky Rectifier Power Supply Board — Single Bridge, 120A, 10000µF, DIY Speaker Amplifier
A complete single-bridge rectifier and filter power supply board featuring a high-current Schottky rectifier bridge rated at 120A and a large 10000µF bulk filter capacitor for smooth DC output. Schottky rectifiers have a lower forward voltage drop (~0.3–0.5V) compared to standard silicon rectifiers (~0.7–1.0V), resulting in lower power dissipation and higher efficiency — particularly important in high-current audio amplifier power supplies where rectifier losses directly affect output power and heat generation. Suitable for DIY HIFI speaker amplifier power supplies, high-current DC bench supplies, and motor drive power stages.
Technical Specifications
| Parameter | Value |
|---|---|
| Rectifier Type | Schottky bridge rectifier |
| Rectifier Current Rating | 120A |
| Filter Capacitor | 10000µF (electrolytic, high-ripple-current rated) |
| Bridge Configuration | Single-phase full-wave bridge |
| Input | AC from transformer secondary (check voltage rating) |
| Output | Rectified and filtered DC |
| Mounting | PCB with screw terminals for AC input and DC output |
| Certification | RoHS |
Schottky vs Standard Rectifier for Audio
| Parameter | Schottky Rectifier | Standard Silicon Rectifier |
|---|---|---|
| Forward Voltage Drop | 0.3–0.5V | 0.7–1.0V |
| Power Loss at 10A | 3–5W | 7–10W |
| Recovery Time | Very fast (nanoseconds) | Slow (microseconds) |
| Reverse Recovery Noise | Very low | Higher (switching noise) |
| Audio PSU Suitability | Preferred (lower noise, higher efficiency) | Acceptable |
Typical Applications
- DIY HIFI Amplifier PSU: High-current rectifier and filter board for Class AB, Class D, and Class T audio amplifier power supplies requiring 20–80A DC output
- Subwoofer Amplifier: High-current power supply for high-power subwoofer amplifier modules (TPA3255, IRS2092, LM3886 parallel) requiring large filter capacitance
- DC Bench Supply: Rectifier and filter stage for a DIY adjustable DC bench power supply with linear or switching regulation
- Motor Drive PSU: High-current DC power supply for DC motor drives, servo drives, and stepper motor driver power stages
FAQ
Q: What transformer do I need for this board?
A: Select a toroidal or EI transformer with a secondary voltage matching your required DC output voltage. DC output ≈ AC secondary × 1.41 (peak) − 1.0V (rectifier drop). For example, a 25V AC secondary gives approximately 34V DC output. Transformer current rating should match or exceed the maximum load current.
Q: Why use 10000µF filter capacitance?
A: Large filter capacitance reduces output ripple voltage and provides energy storage for transient current demands (e.g., bass transients in audio amplifiers). For audio applications, ripple voltage should be kept below 100mV at full load for clean amplifier operation.
Package Contents
- 1 × Schottky rectifier power supply board (120A bridge + 10000µF filter capacitor)
