Overview
The LM1877N-9/NOPB is a monolithic dual audio power amplifier designed and manufactured by Texas Instruments. This device is optimized to deliver high-quality audio performance with minimal external components. It is capable of delivering 2 watts of continuous power per channel into an 8Ω load, making it suitable for a variety of audio applications. The LM1877 features a wide supply voltage range of 6V to 24V, low audio band noise, and high power supply rejection ratio, ensuring stable and clear audio output.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage | 26 | V | |||
| Input Voltage | ±0.7 | V | |||
| Operating Temperature | 0 | 70 | °C | ||
| Storage Temperature | -65 | 150 | °C | ||
| Junction Temperature | 150 | °C | |||
| Output Power (THD = 10%) | VS = 20V, RL = 8Ω | 2.0 | W/Ch | ||
| Total Harmonic Distortion | f = 1 kHz, VS = 14V, PO = 1 W/Channel | 0.055 | % | ||
| Power Supply Rejection Ratio | f = 120 Hz, Output Referred, VS = 20V | -50 | -65 | dB | |
| Channel Separation | f = 1 kHz, Output Referred, VS = 20V | -50 | -70 | dB | |
| Equivalent Input Noise | RS = 0, CIN = 0.1 μF, BW = 20 Hz–20 kHz | 2.5 | μV | ||
| Open Loop Gain | RS = 0, f = 100 kHz, RL = 8Ω | 70 | dB | ||
| Input Offset Voltage | 15 | mV | |||
| Input Bias Current | 50 | nA | |||
| Input Impedance (Open Loop) | 4 | MΩ | |||
| Slew Rate | 2.0 | V/μs | |||
| Power Bandwidth | 65 | kHz | |||
| Current Limit | 1.0 | A |
Key Features
- High Output Power: Delivers 2 watts per channel into an 8Ω load.
- Wide Supply Voltage Range: Operates from 6V to 24V.
- Low Audio Band Noise: Ensures clear and noise-free audio output.
- High Power Supply Rejection Ratio (PSRR): Up to -65 dB, reducing power supply noise.
- High Channel Separation: Up to -70 dB, minimizing crosstalk between channels.
- Low Cross-Over Distortion: Minimizes distortion in the audio signal.
- Internal Thermal Shutdown and AC Short Circuit Protection: Enhances reliability and safety.
- Low Number of External Components Required: Simplifies circuit design and reduces component count.
Applications
- Multi-Channel Audio Systems: Suitable for various multi-channel audio setups.
- Stereo Phonographs: Ideal for phonograph amplifiers with bass tone control.
- Tape Recorders and Players: Used in tape recorder and player systems.
- AM-FM Radio Receivers: Applicable in radio receiver circuits.
- Servo Amplifiers: Can be used in servo control applications.
- Intercom Systems: Suitable for intercom and communication systems.
- Automotive Products: Used in automotive audio and other electronic systems.
Q & A
- What is the maximum output power of the LM1877 per channel?
The LM1877 can deliver up to 2 watts per channel into an 8Ω load.
- What is the operating temperature range of the LM1877?
The operating temperature range is from 0°C to 70°C.
- What is the power supply rejection ratio (PSRR) of the LM1877?
The PSRR is up to -65 dB, referred to the output.
- Does the LM1877 have built-in thermal protection?
Yes, it has internal thermal shutdown protection.
- What is the typical input impedance of the LM1877?
The typical input impedance is 4 MΩ.
- Can the LM1877 be used in automotive applications?
Yes, it is suitable for use in automotive products.
- What is the slew rate of the LM1877?
The slew rate is 2.0 V/μs.
- How much current does the LM1877 typically draw when no output power is delivered?
The total supply current is typically 50 mA when no output power is delivered.
- What is the maximum junction temperature for the LM1877?
The maximum junction temperature is 150°C.
- Does the LM1877 require many external components?
No, it is designed to operate with a low number of external components.
