The TPA0211 is a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4-Ω impedance. The device is ideal for small wireless communicators, notebook PCs, PDAs, anyplace a mono speaker and stereo headphones are required. From a 5-V supply, the TPA0211 can deliver 2 W of power into a 4-Ω speaker.
The gain of the input stage is set by the user-selected input resistor and a 50-kΩ internal feedback resistor (AV = –RF / RI). The power stage is internally configured with a gain of –1.25 V/V in SE mode, and –2.5 V/V in BTL mode. Thus, the overall gain of the amplifier is –62.5 kΩ/RI in SE mode and –125 kΩ/RI in BTL mode. The input terminals are high-impedance CMOS inputs, and can be used as summing nodes.
The TPA0211 is available in the 8-pin thermally-enhanced MSOP-PowerPAD package (DGN) and operates over an ambient temperature range of –40°C to 85°C.
| 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) | 2.5 |
| Load (min) (Ω) | 4 |
| Output power (W) | 2 |
| SNR (dB) | 93 |
| THD + N at 1 kHz (%) | 0.2 |
| Iq (typ) (mA) | 4 |
| Control interface | Hardware |
| Closed/open loop | Closed |
| Analog supply (min) (V) | 2.5 |
| Analog supply voltage (max) (V) | 5.5 |
| PSRR (dB) | 58 |
| Operating temperature range (°C) | -40 to 85 |
| HVSSOP (DGN) | 8 | 14.7 mm² 3 x 4.9 |
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