| Audio input type | Analog Input |
| Architecture | Class-AB |
| Speaker channels (Max) | Mono |
| Power stage supply (Max) (V) | 5.5 |
| Power stage supply (Min) (V) | 2 |
| Load (Min) (ohms) | 8 |
| Output power (W) | 1.6 |
| THD + N @ 1 kHz (%) | 0.72 |
| Iq (Typ) (mA) | 6.5 |
| Control interface | Hardware |
| Closed/open loop | Closed |
| Analog supply (Min) (V) | 2 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 65 |
| Operating temperature range (C) | -40 to 85 |
- No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
- Small Outline (SOIC) packaging
- Compatible with PC power supplies
- Thermal shutdown protection circuitry
- Unity-gain stable
- External gain configuration capability
Key Specifications
- THD+N for 1kHz at 1W continuous?average output power into 8? 1.0% (max)
- Output power at 10% THD+N at 1kHz into 8? 1.5 W (typ)
- Shutdown Current 0.6μA (typ)
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The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8Ω load with 1% THD+N using a 5V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.
The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.
The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation.
