| Audio input type | Analog Input |
| Architecture | Class-AB |
| Speaker channels (Max) | Mono |
| Power stage supply (Max) (V) | 5.5 |
| Power stage supply (Min) (V) | 2.7 |
| Load (Min) (ohms) | 4 |
| Output power (W) | 0.85 |
| THD + N @ 1 kHz (%) | 0.7 |
| Iq (Typ) (mA) | 3.6 |
| Control interface | Hardware |
| Closed/open loop | Open |
| Analog supply (Min) (V) | 2.7 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 50 |
| Operating temperature range (C) | -40 to 85 |
- VSSOP, SOIC, PDIP, and WSON Packaging
- No Output Coupling Capacitors, Bootstrap Capacitors, or Snubber Circuits are Necessary
- Thermal Shutdown Protection Circuitry
- Unity-Gain Stable
- External Gain Configuration Capability
Key Specifications
- PO at 1% THD+N with VDD = 5V, 1kHz
- LM4864LD, 4? load 625 mW (typ)
- LM4864LD, 8? load 725 mW (typ)
- LM4864M & LM4864N, 8? load 675 mW (typ)
- LM4864MM, 8? load 300 mW (typ)
- LM4864, 16? load 550 mW (typ)
- Shutdown current 0.7 μA (typ)
All trademarks are the property of their respective owners. Boomer is a trademark of Texas Instruments.
The LM4864 is a bridged audio power amplifier capable of delivering 725mW of continuous average power into an 8Ω load with 1% THD+N from a 5V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power from a low supply voltage while requiring a minimal amount of external components. Since the LM4864 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications.
The LM4864 features an externally controlled, low power consumption shutdown mode, and thermal shutdown protection.
The closed loop response of the unity-gain stable LM4864 can be configured by external gain-setting resistors. The device is available in multiple package types to suit various applications.