LM48100Q-Q1 Datasheet, PDF (1/28 Pages) Texas Instruments – Audio Power Amplifier

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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
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 V_DD = 5 V, R_L = 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 LM48100Q-
Q1 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM48100Q-Q1
HTSSOP (14)
5.00 mm × 4.40 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Audio Amplifier Application Circuit
3.0V to 5.5V
CB
1 PF
CB
0.1 PF
PVDD
VDD
CIN1
0.1 PF
IN1
VOLUME CONTROL
-80 dB TO +18 dB
OUTA
CBIAS
2.2 PF
BIAS
CIN2
0.1 PF
IN2
+1.8V to +5.5V
CB
0.1 PF
I²CVDD
SDA
SCL
ADR
BIAS
VOLUME CONTROL
-80 dB TO +18 dB
MIXER/MULITPLEXER
I²C CONTROL
+6 dB
FAULT
DETECTION
OUTB
VDD
RPU
1.5 k:
FAULT
GND
PGND
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.