MUX/

GAIN

STAGE

VDD

IN1+

IN1-

SGND

OUT+

OUT-

+2.7V to +5.5V

CS

CBST

BOOST

CONVERTER

ALC

SCL/GAIN

SW

PGND

VBST

L1

SHDN

D1

4.7 PH

1 PF

10:

I2C

INTERFACE

IN2+

IN2-

SDA/SEL

0.47 PF

CIN

CIN

CIN

CIN

SET

SW/HW

0.47 PF

0.47 PF

0.47 PF

RL

CL

Product

Folder

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LM48560

SNAS513F – AUGUST 2011 – REVISED NOVEMBER 2015

LM48560 Boomer™ Audio Power Amplifier Series High Voltage Class H Ceramic Speaker

Driver With Automatic Level Control

1 Features

3 Description

The

LM48560

device

is

a

high

voltage,

high

1

•

Class H Topology

efficiency, Class H driver for ceramic speakers and

•

Integrated Boost Converter

piezo actuators. The LM48560 device’s Class H

•

Bridge-Tied Load (BTL) Output

architecture

offers

significant

power

savings

compared to traditional Class AB amplifiers. The

•

Selectable Differential Inputs

device provides 30 VP-P output drive while consuming

•

Selectable Control Interfaces

just 4 mA of quiescent current from a 3.6 V supply.

–

(Hardware or Software mode)

The LM48560 device features TI’s unique automatic

•

I2C Programmable ALC

level control (ALC) that provides output limiter

•

Low Supply Current

functionality. The LM48560 device features two fully

differential inputs with separate gain settings, and a

•

Minimum External Components

selectable control interface. In software control mode,

•

Micro-Power Shutdown

the gain control and device modes are configured

•

Available in Space-Saving DSBGA Package

through the I2C interface. In hardware control mode,

•

Key Specifications:

the gain and input mux are configured through a pair

of logic inputs.

–

Output Voltage at VDD = 3.6 V,

RL = 1.5 μF + 10 Ω, THD+N ≤ 1%

The LM48560 device has a low power shutdown

mode that reduces quiescent current consumption to

–

30 VP-P (Typical)

0.1

μA. The LM48560 device is available in an ultra-

–

Quiescent Power Supply Current

small 16–bump DSBGA package (1.97 mm × 1.97

at 3.6 V (ALC Enabled)

mm).

–

4 mA (Typical)

Device Information(1)

–

Power Dissipation at 25 VP-P, 1 W (Typical)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

–

Shutdown Current, 0.1

μA (Typical)

LM48560

DSBGA (16)

1.97 mm × 1.97 mm

2 Applications

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

•

Touch Screen Smart Phones

•

Tablet PCs

Typical Application Circuit

•

Portable Electronic Devices

•

MP3 Players

1

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.