VOLUME CONTROL

-80 dB TO +18 dB

MIXER/MULITPLEXER

I

2

C CONTROL

BIAS

FAULT

DETECTION

VDD

PVDD

+1.8V to +5.5V

I

2

CVDD

SDA

SCL

ADR

IN2

IN1

BIAS

GND

PGND

FAULT

OUTA

OUTB

VDD

+6 dB

0.1 PF

0.1 PF

0.1 PF

0.1 PF

2.2 PF

1.5 k:

1 PF

VOLUME CONTROL

-80 dB TO +18 dB

3.0V to 5.5V

CB

CB

CIN1

CIN2

CBIAS

CB

RPU

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

LM48100Q-Q1

SNAS470E – OCTOBER 2008 – REVISED NOVEMBER 2015

LM48100Q-Q1 Boomer™ Mono, 1.3-W Audio Power Amplifier With Output Fault Detection

and Volume Control

Operating from a single 5-V supply, the LM48100Q-

1 Features

Q1 delivers 1.3 W of continuous output power to an 8

1

•

Output Fault Detection

Ω load with < 1% THD+N. Flexible power supply

•

I2C Volume and Mode Control

requirements allow operation from 3 V to 5.5 V. High

power supply rejection ratio (PSRR), 74 dB at 1 kHz,

•

Input Mixer and Multiplexer

allows the device to operate in noisy environments

•

High PSRR

without additional power supply conditioning.

•

Individual 32-Step Volume Control

The LM48100Q-Q1 features dual audio inputs that

•

Short Circuit and Thermal Protection

can be mixed/multiplexed to the device output. Each

•

Advanced Click-and-Pop Suppression

input path has its own independent, 32-step volume

control. The mixer, volume control and device mode

•

Low-Power Shutdown Mode

select are controlled through an I2C compatible

•

Available in 14-Pin HTSSOP Package

interface. An open drain FAULT output indicates

•

Key Specifications:

when a fault has occurred. Comprehensive output

–

Output Power at VDD = 5 V, RL = 8 Ω,

short circuit and thermal overload protection prevent

the device from being damaged during a fault

THD+N

≤ 1% 1.3 W (Typical)

condition.

–

Quiescent Power Supply Current at 5 V,

6 mA (Typical)

A low power shutdown mode reduces supply current

consumption to 0.01 µA. Superior click and pop

–

PSRR at 1 kHz 74 dB (Typical)

suppression eliminates audible transients on power-

–

Shutdown current 0.01

μA (Typical)

up/down and during shutdown. The LM48100Q-Q1 is

available in an 14-pin HTSSOP PowerPAD™ IC

2 Applications

package.

•

Automotive Instrument Clusters

Device Information(1)

•

Hands-Free Car Kits

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Medical

LM48100Q-Q1

HTSSOP (14)

5.00 mm × 4.40 mm

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

3 Description

the end of the datasheet.

The LM48100Q-Q1 is a single supply, mono, bridge-

tied load amplifier with I2C volume control, ideal for

automotive applications. A comprehensive output

fault detection system senses the load conditions,

protecting the device during short circuit events, as

well as detecting open circuit conditions.

Typical Audio Amplifier Application Circuit

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.