TPA3122 class D Amplifier
TPA3122 class D amplifier is an electronic device that increases the voltage, current, or power of a signal. Amplifiers are used in wireless communications and broadcasting, and in audio equipment. Audio amplifiers are a must-have item for any home theater system, audio system, entertainment center, or surround-sound system.
TPA3122 class D Amplifier-circuit
- TPA3122D2 IC is used as a class D audio amplifier and can deliver up to 15W of power at 10% distortions.
- The real advantage of using a class D amp, especially TPA3122 is the fact that this IC doesn’t need a heatsink because it has high efficiency.
- Another great thing about it is the build-it-yourself kit or even cheaper from eBay but you need to be careful not to buy a fake one.
TPA3122 class D Amplifier Features
- 10-W/ch into a 4-Ω Load From a 17-V Supply
- 15-W/ch into an 8-Ω Load From a 28-V Supply
- Operates from 10 V to 30 V
- Efficient Class-D Operation
- 20-pin DIP Package
- Thermal and Short-Circuit Protection with Auto Recovery Feature.
TERMINAL FUNCTIONS of TPA3122 Class D Amplifier
Pin 1: PVCCL – Power supply for left channel H-bridge, not internally connected to PVCCR or AVCC.
Pin 2: SD – Shutdown signal for IC (low = disabled, high = operational). TTL logic levels with compliance to AVCC.
Pin 3: MUTE – Mute signal for quick disable/enable of outputs (high = outputs switch at 50% duty cycle; low = outputs enabled). TTL logic levels with compliance to AVCC.
Pin 4: LIN – Audio input for the left channel.
Pin 5: RIN – Audio input for the Right channel.
Pin 6: BYPASS – Reference for pre-amplifier inputs. Nominally equal to AVCC/8. Also controls start-up time via external capacitor sizing.
Pin 7: AGND – Analog Ground for analog cells in the core.
Pin 8: AGND – Analog ground for digital/analog cells in the core.
Pin 9: VCLAMP – Internally generated voltage supply for bootstrap capacitors.
Pin 10: PVCCR – Power supply for right channel H-bridge, not connected to PVCCL or AVCC.
Pin 11: PGNDR – Power ground for right channel H-bridge.
Pin 12: ROUT – Class-D -H-bridge negative output for the right channel
Pin 13: BSR – Bootstrap I/O for the right channel.
Pin 14: GAIN1 – Gain select most significant bit. TTL logic levels with compliance to AVCC.
Pin 15: GAIN0 – Gain select least significant bit. TTL logic levels with compliance to AVCC.
Pin 16: AVCC – High-voltage analog power supply. Not internally connected to PVCCR or PVCCL.
Pin 17: AVCC – High-voltage analog power supply. Not internally connected to PVCCR or PVCCL.
Pin 18: BSL – Bootstrap I/O for the left channel.
Pin 19: LOUT – Class-D -H-bridge positive output for the left channel.
Pin 20: PGNDL – Power ground for left channel H-bridge.
TPA3122 class D Amplifier Datasheet Pdf:
| Part | TPA3122D2 |
| Category | Semiconductors => Audio => Mid-Power Audio Amplifiers (10-50W) => Analog Input Amplifiers |
| Part family | TPA3122D2 15-W Stereo Class-D Audio Power Amplifier with SE Outputs (TPA3122) |
| Description | 15-W Stereo Class-D Audio Power Amplifier with SE Outputs (TPA3122) 20-PDIP -40 to 85 |
| Company | Texas Instruments, Inc. |
| Status | Active |
| ROHS | Y |
| Sample | Yes |
| Datasheet | Download TPA3122D2 Datasheet |
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