TAS2574 8.5W Digital Input Smart Amp with I/V Sense and Integrated 15V Class-H

Boost

1 Features

• Powerful class-D amplifier

– 8.5W 1% THD+N

– 15V boost with 5.1A max current limit

• Best in class efficiency

– Upto 90% efficiency at system level

– 4.8mW idle channel power

– Integrated Y-bridge

– Advanced 33mV step size class-H boost

• High performance audio channel

– 4.2µV A-wt. idle channel noise

– 114dB Dynamic Range

– -90dB THDN

– Low EMI performance

• Advanced integrated features

– Integrated Speaker IV sense

– Signal detection high efficiency modes

– High accuracy voltage monitor & temp sensor

– Programmable battery input current limit

• Ease of use features

– 1cell, 2cell and 3cell Li-ion battery support

– Clock based power up/down

– Auto clock rate detection: 16kHz to 192kHz

– Integrated ultrasonic tone and chirp generator

– External 14V PVDD supply support

– MCLK free operation

– Thermal and over current protection

– Programmable drive strength IO buffers

• Power Supplies and user interface

– Battery Voltage: 1.8V to 5.5V

– VDD: 1.65V to 1.95V

– IOVDD: 1.2V or 1.8V

– I2S/TDM: 8 channels

– I2C: 4 selectable addresses

• WCSP package

2 Applications

• Mobile phone, Tablets & Wearables

• Smart Speakers with Voice Assistance

• Bluetooth and Wireless speakers

3 Description

The TAS2574 is a digital input Class-D audio amplifier

with an integrated Boost for higher power delivery in

battery-operated systems. The device has integrated

speaker voltage and current sense (IV-Sense) for

real-time monitoring of the loudspeakers. IV-sense

data can be used to run speaker protection algorithms

on a host DSP to enable high output SPL while

keeping speakers in a safe operating region.

The device is optimized for delivering the best battery

life for real use cases of Music playback and Voice

calls. Advanced efficiency optimization features like

Class-H, Y-bridge and algorithms enable the device

to produce best-in-class efficiency across all power

regions of operation. The Class-D amplifier is capable

of delivering 8.5W output power using the integrated

Class-H 15V Boost.

A battery tracking peak voltage limiter and a battery

voltage monitor ADC enables advanced battery

monitoring algorithms on the host processor to

manage peak output power delivery while avoiding

any audio distortion when battery capacity is

depleting.

Up to four devices can share a common bus via

I2S/TDM + I2C interfaces.

Digital

Audio

Interface

Boost

Control

Interface

Clocking

Device

Protections

Power

Management

Digital Core

Monitor

ADC

VBAT, PVDD, and

Temp Monitor

Efficiency

Algos

Filters / Control

IV Sense

ADCs

VBAT

PVDD

TEMP

PVDD

OUT_P

OUT_N

VSNS_P

VSNS_N

SW

DREG

GREG

SBCLK

FSYNC

SDIN

SDOUT

AD1

AD2

SDA

SCL

GND

PGND

BGND

SDZ

IRQZ

Class-D

Amp

VBAT

VDD

IOVDD

VBAT_SNS (opt.)

Functional block diagram

TAS2574

SLASF74 – AUGUST 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.