TPA2000D1

2W 单声道 D 类音频放大器

The is a 2-W mono bridge-tied-load BTL class-D amplifier designed to drive a speaker with at least 4- impedance. The amplifier uses ’s third generation modulation technique, which results in improved efficiency and SNR. It also allows the device to be connected directly to the speaker without the use of the LC output filter commonly associated with class-D amplifiers this results in EMI which must be shielded at the system level. These features make the device ideal for use in devices where high-efficiency is needed to extend battery run time.

The gain of the amplifier is controlled by two input terminals, GAIN1, and GAIN0. This allows the amplifier to be configured for a gain of 6, 12, 18, and 23.5 dB. The differential input terminals are high-impedance CMOS inputs, and can be used as summing nodes.

The class-D BTL amplifier includes depop circuitry to reduce the amount of turnon pop at power up, and when cycling SHUTDOWN\\.

The TPA2000D1 is available in the 16-pin TSSOP and MicroStar Junior™ BGA packages that drive 2 W of continuous output power into a 4- load. TPA2000D1 operates over an ambient temperature range of –40°C to 85°C.

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Modulation Scheme Optimized to Operate Without a Filter

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4 mm × 4 mm MicroStar Junior BGA and TSSOP Package Options

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2 W Into a 4- Speaker THD+N<1%

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<0.2% THD+N at 1.5 W, 1 kHz, Into a 4- Load

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Extremely Efficient Third Generation 5-V Class-D Technology:

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Low-Supply Current No Filter ...4 mA

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Low-Supply Current Filter . . . 7.5 mA

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Low-Shutdown Current . . . 0.05 µA

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Low-Noise Floor ...40 µVRMSNo-Weighting Filter

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Maximum Efficiency Into 8 , 75 – 85 %

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4 Internal Gain Settings ...6 – 23.5 dB

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PSSR . . . –77 dB

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Integrated Depop Circuitry

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Short-Circuit Protection Short to Battery, Ground, and Load

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APPLICATIONS

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High-Efficiency For Extended Battery Run Time

MicroStar Junior is a trademark of Texas Instruments.