LM48823, LM48823TLEVAL

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SNAS464E – JUNE 2008 – REVISED OCTOBER 2010

LM48823

Mono, Bridge-Tied Load, Ceramic Speaker Driver with I2C Volume Control and Reset

Check for Samples: LM48823, LM48823TLEVAL

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FEATURES

KEY SPECIFICATIONS

2

•

Integrated Charge Pump

•

Output Voltage at VDD = 4.2V, RL = 2.2µF + 15Ω

THD+N

≤ 1%: 5.4VRMS (typ)

•

Bridge-Tied Load Output

•

Quiescent Power Supply Current at 4.2V:

•

High PSRR

3.3mA (typ)

•

I2C Volume and Mode Control

•

PSRR at 217Hz: 93dB (typ)

•

Reset Input

•

Shutdown Current: 0.01

μA (typ)

•

Advanced Click-and-Pop Suppression

•

Low Supply Current

DESCRIPTION

•

Minimum External Components

The LM48823 is a single supply, mono, ceramic

•

Micro-Power Shutdown

speaker driver with an integrated charge-pump,

designed for portable devices, such as cell phones,

•

Available in Space-Saving 16-Bump DSBGA

where board space is at a premium. The LM48823

Package

charge pump allows the device to deliver 5.4VRMS

from a single 4.2V supply.

APPLICATIONS

The LM48823 features high power supply rejection

•

Cell Phones

ratio (PSRR), 93dB at 217Hz, allowing the device to

•

Smart Phones

operate in noisy environments without additional

power supply conditioning. Flexible power supply

•

Portable Media Devices

requirements allow operation from 2.0V to 4.5V. The

•

Notebook PCs

LM48823 features an active low reset input that

reverts the device to its default state. Additionally, the

LM48823 features a 32-step I2C volume control. The

low power Shutdown mode reduces supply current

consumption to 0.01µA.

The LM48823’s superior click and pop suppression

eliminates audible transients on power-up/down and

during shutdown. The LM48823 is available in an

ultra-small 16-bump DSBGA package (2mmx2mm).

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PRODUCTION DATA information is current as of publication date.

Copyright © 2008–2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.