Overview
The LM1876TF/NOPB, produced by Texas Instruments, is a dual 20W audio power amplifier that is part of the Overture™ Audio Power Amplifier Series. This device is designed to deliver high-quality audio with minimal external components. It features independent mute and standby modes, making it versatile for various audio applications. The LM1876TF/NOPB operates over a wide supply range of 20V to 64V and is capable of driving loads of 4Ω or 8Ω with less than 0.1% Total Harmonic Distortion plus Noise (THD+N).
Key Specifications
| Parameter | Conditions | Typical Value | Limit Value | Units |
|---|---|---|---|---|
| Supply Voltage (|VCC| + |VEE|) | No Input | - | 64 | V |
| Output Power (Continuous Average) | THD + N = 0.1%, f = 1 kHz, |VCC| = |VEE| = 22V, RL = 8Ω | 20 | 15 | W/ch |
| Output Power (Continuous Average) | THD + N = 0.1%, f = 1 kHz, |VCC| = |VEE| = 20V, RL = 4Ω | 22 | 15 | W/ch |
| Total Harmonic Distortion plus Noise (THD + N) | 15 W/ch, RL = 8Ω | 0.08% | - | % |
| Power Supply Rejection Ratio (PSRR) | VCC = 25V to 10V, VEE = -25V to -10V | 115 dB | 85 dB | dB |
| Common Mode Rejection Ratio (CMRR) | VCC = 35V to 10V, VEE = -10V to -35V | 110 dB | 80 dB | dB |
| Operating Temperature Range | - | -20°C to +85°C | - | °C |
| Junction Temperature | - | 150°C | - | °C |
Key Features
- High Output Power: Capable of delivering typically 20W per channel into a 4Ω or 8Ω load with less than 0.1% THD+N.
- Mute and Standby Modes: Independent smooth transition fade-in/out mute mode and a power conserving standby mode controlled by external logic.
- Wide Supply Range: Operates over a supply range of 20V to 64V.
- Minimal External Components: Requires a minimal amount of external components.
- SPiKe Protection: Protected from instantaneous peak-temperature stressing of the power transistor array.
- Thermal Protection: Sophisticated thermal protection scheme to prevent long-term thermal stress.
- Bridged Amplifier Configuration: Can be configured in bridged mode to double the output swing and theoretically achieve four times the output power compared to single-ended configuration.
Applications
- Home Audio Systems: Suitable for home stereo systems and audio equipment requiring high-quality audio amplification.
- Professional Audio Equipment: Used in professional audio gear such as mixers, amplifiers, and sound systems.
- Automotive Audio Systems: Can be used in car audio systems where high power and low distortion are required.
- Public Address Systems: Ideal for public address systems and other applications where reliable and high-quality audio is necessary.
Q & A
- What is the typical output power of the LM1876TF/NOPB?
The LM1876TF/NOPB can deliver typically 20W per channel into a 4Ω or 8Ω load with less than 0.1% THD+N.
- What are the mute and standby modes in the LM1876TF/NOPB?
The device features independent smooth transition fade-in/out mute mode and a power conserving standby mode controlled by external logic.
- What is the operating temperature range of the LM1876TF/NOPB?
The operating temperature range is -20°C to +85°C.
- What is the maximum junction temperature of the LM1876TF/NOPB?
The maximum junction temperature is 150°C.
- Does the LM1876TF/NOPB have thermal protection?
Yes, it has a sophisticated thermal protection scheme to prevent long-term thermal stress.
- Can the LM1876TF/NOPB be used in bridged amplifier configuration?
Yes, it can be configured in bridged mode to double the output swing and theoretically achieve four times the output power compared to single-ended configuration.
- What is the supply voltage range of the LM1876TF/NOPB?
The device operates over a supply range of 20V to 64V.
- Does the LM1876TF/NOPB have over-voltage protection?
Yes, it contains over-voltage protection circuitry that limits the output current and provides voltage clamping.
- What is the purpose of the SPiKe protection in the LM1876TF/NOPB?
The SPiKe protection protects the device from instantaneous peak-temperature stressing of the power transistor array.
- How does the under-voltage protection work in the LM1876TF/NOPB?
The under-voltage protection circuitry allows the power supplies and their corresponding capacitors to come up close to their full values before turning on the LM1876, preventing DC output spikes at power-up and transients at power-down.
