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TPA2010D1YEFR データシート(PDF) 11 Page - Texas Instruments |
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TPA2010D1YEFR データシート(HTML) 11 Page - Texas Instruments |
11 / 33 page _ + _ + _ + _ + 150 k Ω 150 k Ω _ + _ + Deglitch Logic Deglitch Logic Gate Drive Gate Drive VDD OC Detect Startup Protection Logic Ramp Generator Biases and References TTL Input Buffer SD *Gain = 2 V/V B1, B2 VDD A3 VO- C3 VO+ A2, B3 GND C1 IN- A1 IN+ C2 SHUTDOWN 300 k Ω Notes: * Total gain = 150 k Ω RI 2 x 150 k Ω RI *Gain = TPA2010D1 www.ti.com SLOS417D – OCTOBER 2003 – REVISED NOVEMBER 2015 10 Detailed Description 10.1 Overview The TPA2010D1 is a high-efficiency filter-free Class-D audio amplifier capable of delivering up to 2.5 W into 4- Ω loads with 5-V power supply. The fully-differential design of this amplifier avoids the usage of bypass capacitors and the improved CMRR eliminates the usage of input-coupling capacitors. This makes the device size a perfect choice for small, portable applications because only three external components are required. The advanced modulation used in the TPA2010D1 PWM output stage eliminates the need for an output filter. 10.2 Functional Block Diagram 10.3 Feature Description 10.3.1 Fully Differential Amplifier The TPA2010D1 is a fully differential amplifier with differential inputs and outputs. The fully differential amplifier consists of a differential amplifier and a common-mode amplifier. The differential amplifier ensures that the amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. The common-mode feedback ensures that the common-mode voltage at the output is biased around VDD/2 regardless of the common-mode voltage at the input. The fully differential TPA2010D1 can still be used with a single-ended input; however, TI recommends using the TPA2010D1 with differential inputs when in a noisy environment, like a wireless handset, to ensure maximum noise rejection. Copyright © 2003–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPA2010D1 |
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