Class-D Audio Power Amplifier

ADAU1592

Rev. 0

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FEATURES

Integrated stereo modulator and power stage

0.005% THD + N

101 dB dynamic range

PSRR > 65 dB

Efficiency > 90% (8 Ω)

EMI-optimized modulator

On/off-mute pop-noise suppression

Short-circuit protection

Overtemperature protection

APPLICATIONS

Flat panel televisions

PC audio systems

Mini-components

GENERAL DESCRIPTION

The ADAU1592 is a 2-channel, bridge-tied load (BTL)

switching audio power amplifier with an integrated Σ-Δ

modulator.

The modulator accepts an analog input signal and generates

a switching output to drive speakers directly. A digital,

microcontroller-compatible interface provides control of reset,

mute and PGA gain as well as output signals for thermal and

overcurrent error conditions. The output stage can operate

from supply voltages ranging from 9 V to 18 V. The analog

modulator and digital logic operate from a 3.3 V supply.

FUNCTIONAL BLOCK DIAGRAM

A1

PVDD

OUTL+

PGND

A2

B1

PVDD

OUTL–

PGND

B2

C1

PVDD

OUTR+

PGND

C2

D1

PVDD

OUTR–

PGND

D2

LEVEL SHIFT

AND DEAD

TIME CONTROL

Σ-Δ

MODULATOR

TEMPERATURE/

OVERCURRENT

PROTECTION

MODE CONTROL

LOGIC

CLOCK

OSCILLATOR

PGA

ADAU1592

VOLTAGE

REFERENCE

PGA

SLICER

AINL

SLC_TH

PGA0

PGA1

PGA0

PGA1

AINR

VREF

AVDD

AGND

DVDD

DGND

OTW

XTO

XTI

ERR

MUTE

STDN

MO/ST

Figure 1.