P3188 Fully Encapsulated SMD Shielded Audio Isolation Transformer 1:1 with 6 Pins
1.Product Description
P3188 is a fully packaged, shielded SMD patch audio isolation transformer designed with a 1:1 turns ratio and equipped with 6 pins. Its core value lies in effectively eliminating ground loop noise, common mode interference, and DC components in audio circuits through magneto electric isolation, thereby significantly improving the signal-to-noise ratio and purity of audio signals. The fully enclosed magnetic shielding structure can effectively suppress electromagnetic interference and ensure stable performance on dense circuit boards; Meanwhile, SMD surface mount packaging and full resin packaging technology endow it with excellent moisture, dust, and mechanical vibration resistance, making it highly suitable for modern audio equipment that requires high reliability and automated production.
P3188 is a precision component designed specifically for audio circuits, whose core function is to solve a series of common signal integrity issues through magneto electric isolation. Its main functions are as follows:
1. Electrical isolation
Core function: Provide physical electrical isolation and disconnect DC circuits between input and output terminals.
Solution: Thoroughly eliminate the grounding loop noise caused by the potential difference between devices (manifested as continuous "buzzing" sound), and protect sensitive circuits from damage caused by surges and DC offsets.
2. Common mode noise and interference suppression
Core function: The built-in magnetic shielding layer can effectively resist electromagnetic interference (EMI) and radio frequency interference (RFI).
Problem solving: Significantly reduce noise coupling from external sources (such as power supplies, RF devices) or other components inside the circuit board, ensure audio signal purity, and improve signal-to-noise ratio.
3. Signal coupling and DC blocking
Core function: As a 1:1 transformer, it can couple AC audio signals without loss while isolating DC.
Problem solving: Safely connect circuits with different DC bias levels to prevent DC components from flowing into the audio path, causing equipment damage or performance degradation.
4. Impedance matching and signal transmission
Core function: In specific audio circuits, although it has a 1:1 ratio, it can still help maintain the balance of the circuit and achieve effective signal transmission under the recommended circuit design.
Problem solving: Ensure the integrity of audio signals during long-distance transmission or conversion between different interfaces, reducing signal loss and distortion.
5. Physical protection and reliability
Core function: The all resin packaging and SMD patch design provide a robust physical structure.
Problem solving: Provide excellent moisture, dust, corrosion, and mechanical vibration and impact resistance, ensuring stable performance in harsh environments and adapting to automated large-scale production.
2.Performance Characteristics
| Feature Category | Specification / Description |
| General Type | Audio Frequency Isolation Transformer |
| Turn Ratio | 1:1 (Primary : Secondary) |
| Mounting Style | Surface Mount Device (SMD) |
| Package | Fully Encapsulated (Plastic Case) |
| Shielding | Integrated Internal Magnetic Shield |
| Pin Count | 6 Pins |
| Primary Function | Electrical Isolation & Common-Mode Noise Rejection |
| Key Benefits | - Eliminates Ground Loop Hum & Noise |
| - Suppresses EMI/RFI Interference |
| - Blocks DC Bias between circuits |
| - Enhances Signal Integrity (SI) |
| Construction | Robust, shielded construction within a resin-filled package for maximum environmental protection. |
| Typical Applications | - Professional Audio Equipment (Mixers, Interfaces) |
| - Communication Systems |
| - Consumer Audio Devices |
| - Audio I/O Ports on Digital Devices |
3.Other Recommended Products
4.Company Profile
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P3188 Fully Encapsulated SMD Shielded Audio Isolation Transformer with 1:1 Turns Ratio and 6 Pins Images
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