1 Features

1• Class H Topology

• Integrated Boost Converter

• Bridge-Tied Load (BTL) Output

• Selectable Differential Inputs

• Selectable Control Interfaces

– (Hardware or Software mode)

• I2C Programmable ALC

• Low Supply Current

• Minimum External Components

• Micro-Power Shutdown

• Available in Space-Saving DSBGA Package

• Key Specifications:

– Output Voltage at VDD = 3.6 V,

RL = 1.5 μF + 10 Ω, THD+N ≤ 1%

– 30 VP-P (Typical)

– Quiescent Power Supply Current

at 3.6 V (ALC Enabled)

– 4 mA (Typical)

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

– Shutdown Current, 0.1 μA (Typical)

2 Applications

• Touch Screen Smart Phones

• Tablet PCs

• Portable Electronic Devices

• MP3 Players

3 Description

The LM48560 device is a high voltage, high

efficiency, Class H driver for ceramic speakers and piezo actuators. The LM48560 device’s Class H

architecture offers significant power savings

compared to traditional Class AB amplifiers. The

device provides 30 VP-P output drive while consuming just 4 mA of quiescent current from a 3.6 V supply.

The LM48560 device features TI’s unique automatic level control (ALC) that provides output limiter

functionality. The LM48560 device features two fully

differential inputs with separate gain settings, and a

selectable control interface. In software control mode,

the gain control and device modes are configured

through the I2C interface. In hardware control mode,

the gain and input mux are configured through a pair

of logic inputs.

The LM48560 device has a low power shutdown

mode that reduces quiescent current consumption to

0.1 μA. The LM48560 device is available in an ultra-

small 16–bump DSBGA package (1.97 mm × 1.97 mm).