1 Features

1• Output Fault Detection

• I2C Volume and Mode Control

• Input Mixer and Multiplexer

• High PSRR

• Individual 32-Step Volume Control

• Short Circuit and Thermal Protection

• Advanced Click-and-Pop Suppression

• Low-Power Shutdown Mode

• Available in 14-Pin HTSSOP Package

• Key Specifications:

– Output Power at VDD = 5 V, RL = 8 Ω,

THD+N ≤ 1% 1.3 W (Typical)

– Quiescent Power Supply Current at 5 V,

6 mA (Typical)

– PSRR at 1 kHz 74 dB (Typical)

– Shutdown current 0.01 μA (Typical)

2 Applications

• Automotive Instrument Clusters

• Hands-Free Car Kits

• Medical

3 Description

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.

Operating from a single 5-V supply, the LM48100QQ1

delivers 1.3 W of continuous output power to an 8

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

requirements allow operation from 3 V to 5.5 V. High

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

allows the device to operate in noisy environments without additional power supply conditioning.

The LM48100Q-Q1 features dual audio inputs that can be mixed/multiplexed to the device output. Each

input path has its own independent, 32-step volume

control. The mixer, volume control and device mode

select are controlled through an I2C compatible

interface. An open drain FAULT output indicates

when a fault has occurred. Comprehensive output

short circuit and thermal overload protection prevent

the device from being damaged during a fault

condition.

A low power shutdown mode reduces supply current

consumption to 0.01 μA. Superior click and pop

suppression eliminates audible transients on power- up/down and during shutdown. The LM48100Q-Q1 is

available in an 14-pin HTSSOP PowerPAD™ IC

package.