| Audio input type | Analog Input |
| Architecture | Class-AB |
| Speaker channels (Max) | Stereo |
| Power stage supply (Max) (V) | 5.5 |
| Power stage supply (Min) (V) | 2 |
| Load (Min) (ohms) | 16 |
| Output power (W) | 0.4 |
| THD + N @ 1 kHz (%) | 0.03 |
| Iq (Typ) (mA) | 2 |
| Control interface | Shutdown Mode |
| Closed/open loop | Open |
| Analog supply (Min) (V) | 2 |
| Analog supply (Max) (V) | 5.5 |
| PSRR (dB) | 65 |
| Operating temperature range (C) | -40 to 85 |
- OCL outputs — No DC Blocking Capacitors
- External Gain-Setting Capability
- Available in Space-Saving VSSOP Package
- Ultra Low Current Shutdown Mode
- 2V - 5.5V Operation
- Ultra Low Noise
Key Specifications
- PSRR at 217Hz and 1kHz
- Output Power at 1kHz with VDD = 2.4V,
1% THD+N into a 16? load, 65dB (Typ) - Output Power at 1kHz with VDD = 3V,
1% THD+N into a 16? load, 25 mW (Typ) - Shutdown current, 40 mW (Typ), 2.0μA (Max)
- Output Voltage change on release
from Shutdown VDD = 2.4V, RL = 16?, 1mV (Max)
Boomer is a trademark of Texas Instruments. All trademarks are the property of their respective owners.
The LM4929 is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16? load or 25mW per channel into a 32? load at 1% THD+N from a 3V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4929 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4929 is configured for OCL (Output Capacitor-Less) outputs, operating with no DC blocking capacitors on the outputs.
The LM4929 features a low-power consumption shutdown mode with a faster turn on time. Additionally, the LM4929 features an internal thermal shutdown protection mechanism.
The LM4929 is unity gain stable and may be configured with external gain-setting resistors.