LA4108 2-Channel Power Amplifier 12V 45mA IC DIP-20
The LA4108 is a 2-channel (stereo) audio power amplifier IC designed for delivering high-quality sound output in compact electronic systems. It is widely used in audio devices such as radios, cassette players, portable speakers, and DIY amplifier circuits. With its ability to deliver around 5W per channel, it provides sufficient power for small to medium audio applications while maintaining low distortion and stable performance.
This IC features a wide operating voltage range and built-in protection circuits such as thermal shutdown, ensuring safe and reliable operation. It requires a minimal number of external components, making it easy to integrate into circuit designs. it’s also includes features like low noise, high ripple rejection, and reduced pop noise during power ON/OFF, making it suitable for high-quality audio amplification in both consumer and hobby electronics.
Features:
- Dual-channel (stereo) audio amplifier.
- High output power capability.
- Low noise and low distortion.
- Built-in thermal shutdown protection.
- High ripple rejection for clean audio.
- Low pop noise during power ON/OFF.
- Minimal external components required.
- Suitable for battery-powered applications.
Specifications:
| Parameter | Value |
|---|---|
| Model | LA4108 |
| Package Type | DIP-20 |
| Channels | 2 (Stereo) |
| Output Power | ~5.3W per channel |
| Supply Voltage Range | 6V – 18V |
| Recommended Voltage | 12V |
| Output Current (Peak) | Up to 2.5A (per channel) |
| Quiescent Current | ~45mA |
| Gain | ~50 dB |
| Load Impedance | 3Ω |
Pinout:
| Pin No. | Pin Name | Description |
|---|---|---|
| 1 | IN1 | Channel 1 audio input |
| 2 | NF1 | Feedback pin for Channel 1 |
| 3 | RF (Ripple Filter) | Ripple filter connection for power supply noise reduction |
| 4 | PRE GND | Pre-amplifier ground |
| 5 | OUT1 | Channel 1 output |
| 6 | BOOT1 | Bootstrap capacitor connection for Channel 1 |
| 7 | VCC | Positive power supply |
| 8 | PWR GND | Power ground |
| 9 | BOOT2 | Bootstrap capacitor connection for Channel 2 |
| 10 | OUT2 | Channel 2 output |
| 11 | THD | Thermal shutdown control |
| 12 | MUTE | Audio mute control pin |
| 13 | NF2 | Feedback pin for Channel 2 |
| 14 | IN2 | Channel 2 audio input |
| 15 | PRE-DRIVE B2 | Pre-driver base for Channel 2 |
| 16 | PRE-DRIVE C2 | Pre-driver collector for Channel 2 |
| 17 | COMP2 | Frequency compensation for Channel 2 |
| 18 | COMP1 | Frequency compensation for Channel 1 |
| 19 | PRE-DRIVE B1 | Pre-driver base for Channel 1 |
| 20 | PRE-DRIVE C1 | Pre-driver collector for Channel 1 |
Applications:
- Audio amplifiers.
- Portable speakers.
- Radios and cassette players.
- DIY audio projects.
- Home audio systems.
Package Includes:
- 1x LA4108 2-Channel Power Amplifier 12V 45mA IC DIP-20.