The LM4819 is a mono bridged power amplifier that is capable of delivering 350mWRMS output power into a 16Ω load or 300mWRMS output power into an 8Ω load with 10% THD+N from a 5V power supply.
The LM4819 Boomer audio power amplifier is designed specifically to provide high quality output power and minimize PCB area with surface mount packaging and a minimal amount of external components. Since the LM4819 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally suited for low-power portable applications.
The closed loop response of the unity-gain stable LM4819 can be configured using external gain-setting resistors. The device is available in WSON, VSSOP, and SOIC package types to suit various applications.
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| Audio input type | Analog Input |
| Architecture | Class-AB |
| Speaker channels (max) | Mono |
| Rating | Catalog |
| Power stage supply (max) (V) | 5.5 |
| Power stage supply (min) (V) | 2 |
| Load (min) (Ω) | 8 |
| Output power (W) | 0.35 |
| SNR (dB) | 102 |
| THD + N at 1 kHz (%) | 1 |
| Iq (typ) (mA) | 1.5 |
| Control interface | Hardware |
| Closed/open loop | Closed |
| Analog supply (min) (V) | 2 |
| Analog supply voltage (max) (V) | 5.5 |
| Operating temperature range (°C) | -40 to 85 |
| SOIC (D) | 8 | 29.4 mm² 4.9 x 6 |
| VSSOP (DGK) | 8 | 14.7 mm² 3 x 4.9 |
| WSON (NGL) | 8 | 6.25 mm² 2.5 x 2.5 |
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