TPA0211

具有单声道耳机驱动的单声道 AB 类音频放大器

The 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.

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2 W Into 4 Ω From 5-V Supply

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0.6 W Into 4 Ω From 3-V Supply

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Wide Power Supply Compatibility: 3 V to 5 V

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Low Supply Current:

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4 mA Typical at 5 V

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4 mA Typical at 3 V

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Shutdown Control: 1 µA Typical

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Shutdown Pin Is TTL Compatible

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–40°C to 85°C Operating Temperature Range

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Space-Saving, Thermally-Enhanced MSOP-PowerPAD™ Packaging