LM4835MTEX

Manufacturer Part NumberLM4835MTEX
DescriptionStereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain
ManufacturerNational Semiconductor
LM4835MTEX datasheet
 


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LM4835
Stereo 2W Audio Power Amplifiers
with DC Volume Control and Selectable Gain
General Description
The LM4835 is a monolithic integrated circuit that provides
DC volume control, and stereo bridged audio power amplifi-
ers capable of producing 2W into 4Ω (Note 1) with less than
1.0% THD or 2.2W into 3Ω (Note 2) with less than 1.0%
THD.
Boomer
®
audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4835 incorporates a
DC volume control, stereo bridged audio power amplifiers
and a selectable gain or bass boost, making it optimally
suited for multimedia monitors, portable radios, desktop, and
portable computer applications.
The LM4835 features an externally controlled, low-power
consumption shutdown mode, and both a power amplifier
and headphone mute for maximum system flexibility and
performance.
Note 1: When properly mounted to the circuit board, the LM4835LQ and
LM4835MTE will deliver 2W into 4Ω. The LM4835MT will deliver 1.1W into
8Ω. See the Application Information section LM4835LQ and for LM4835MTE
usage information.
Note 2: An LM4835LQ and LM4835MTE that have been properly mounted
to the circuit board and forced-air cooled will deliver 2.2W into 3Ω.
Connection Diagrams
LLP Package
Top View
Order Number LM4835LQ
See NS Package LQA028AA for Exposed-DAP LLP
Boomer
®
is a registered trademark of NationalSemiconductor Corporation.
© 2003 National Semiconductor Corporation
Key Specifications
n P
at 1% THD+N
O
into 3Ω (LM4835LQ, LM4835MTE)
n
into 4Ω (LM4835LQ, LM4835MTE)
n
into 8Ω (LM4835)
n
n Single-ended mode - THD+N at 85mW into 32Ω
(typ)
n Shutdown current
Features
n PC98 Compliant
n DC Volume Control Interface
n System Beep Detect
n Stereo switchable bridged/single-ended power amplifiers
n Selectable internal/external gain and bass boost
configurable
n “Click and pop” suppression circuitry
n Thermal shutdown protection circuitry
Applications
n Portable and Desktop Computers
n Multimedia Monitors
n Portable Radios, PDAs, and Portable TVs
10013935
Order Number LM4835MT or LM4835MTE
See NS Package MTC28 for TSSOP
or See NS Package MXA28A for Exposed-DAP TSSOP
DS100139
February 2003
2.2W (typ)
2.0W (typ)
1.1W (typ)
1.0%
0.7µA (typ)
TSSOP Package
10013902
Top View
www.national.com

LM4835MTEX Summary of contents