Texas Instruments Boomer® LM4922TL, Class AB stereo headphone amplifier, 2-channel, 80mW x 1 @ 16Ω, 1.6V–4.2V supply, -40°C to 85°C, 14-WFBGA/DSBGA, surface mount.
| Parameter | Value |
|---|---|
| Type | Class AB |
| Series | Boomer® |
| Output type | Headphones, 2-Channel (Stereo) |
| Mounting | Surface Mount |
| Supply voltage | 1.6V ~ 4.2V |
| Max output power x channels @ load | 80mW x 1 @ 16Ohm |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Bulk |
| Case | 14-WFBGA, DSBGA |
The 1.6 V to 4.2 V supply window lets this amplifier run directly from a lithium-ion cell without an extra regulator. At the low end it still drives headphones down to near-depleted battery voltage — useful for portable speakers, Bluetooth headsets, and handheld gaming audio where every millivolt of headroom extends playtime.
Yes. While the rated 80 mW is into 16 Ω, the amplifier will drive 32 Ω headphones at lower power — still sufficient for typical listening levels given headphone sensitivity. The supply voltage range (1.6 V to 4.2 V) provides the voltage swing needed.
Within the Boomer® family, several stereo headphone amplifiers share the 14-DSBGA footprint. The LM4922TL's specific combination of 80 mW output and 1.6 V minimum supply is its distinguishing point; a direct pin-compatible substitute would need to match the DSBGA bump map. No single alternative is listed as an official cross, so verify the bump assignment before substituting.