The LM4920 is a ground referenced, fixed-gain audio power amplifier capable of delivering 80mW of continuous average power into a 16 single-ended load with less than 1% THD+N from a 3V power supply.
The LM4920 features a new circuit technology that utilizes a charge pump to generate a negative reference voltage. This allows the outputs to be biased about ground, thereby eliminating output-coupling capacitors typically used with normal single-ended loads.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4920 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
| LM4920 | |
| Headphone Channels | Stereo |
| Special Features | Fixed Gain |
| Supply Max (Max) (Volt) | 3.6 |
| Supply Min (Min) (Volt) | 1.4 |
| THD (%) | 0.03 |
| Ground-Centered Outputs | Yes |
| Output Power (W) | 0.08 |
| Load (Min) (ohms) | 16 |
| ISD (uA) | 0.1 |
| PSRR (dB) | 70 |
