_

+

_

+

_

+

_

+

150 k

Ω

150 k

Ω

_

+

_

+

Deglitch

Logic

Deglitch

Logic

Gate

Drive

Gate

Drive

OC

Detect

Startup

Protection

Logic

Ramp

Generator

Biases

and

References

TTL

Input

Buffer

SD

*Gain = 2 V/V

B1, B2

A3

C3

A2, B3

GND

C1

IN-

A1

IN+

C2

SHUTDOWN

300 k

Ω

Notes:

* Total gain =

150 k

Ω

2 x

150 k

Ω

*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

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

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