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LM4836MT Datasheet

  • LM4836MT

  • National Semiconductor [Stereo 2W Audio Power Amplifiers wi...

  • NSC

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LM4836 Stereo 2W Audio Power Amplifiers with DC Volume Control, Bass Boost, and Input Mux
PRELIMINARY
June 1999
LM4836
Stereo 2W Audio Power Amplifiers
with DC Volume Control, Bass Boost, and Input Mux
General Description
The LM4836 is a monolithic integrated circuit that provides
DC volume control, and stereo bridged audio power amplifi-
ers capable of producing 2W into 4鈩?(Note 1) with less than
1.0% THD+N, or 2.2W into 3鈩?(Note 2) with less than 1.0%
THD+N.
Boomer
廬
audio integrated circuits were designed specifically
to provide high quality audio while requiring a minimum
amount of external components. The LM4836 incorporates a
DC volume control, stereo bridged audio power amplifiers,
selectable gain or bass boost, and an input mux making it
optimally suited for multimedia monitors, portable radios,
desktop, and portable computer applications.
The LM4836 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 LM4836MTE will
deliver 2W into 4鈩? The LM4836MT will deliver 1.1W into 8鈩? See the Appli-
cation Information section for LM4836MTE usage information.
Note 2:
An LM4836MTE which has been properly mounted to the circuit
board and forced-air cooled will deliver 2.2W into 3鈩?
Key Specifications
n
P
O
at 1% THD+N
into 3鈩?(LM4836MTE)
into 4鈩?(LM4836MTE)
into 8鈩?(LM4836)
n
Single-ended mode - THD+N
at 85mW into 32鈩?/div>
n
Shutdown current
2.2W(typ)
2.0W(typ)
1.1W(typ)
1.0%(typ)
0.2碌A(chǔ)(typ)
Features
PC98 and PC99 Compliant
DC Volume Control Interface
Input mux
System Beep Detect
Stereo switchable bridged/single-ended power amplifiers
Selectable internal/external gain and bass boost
configurable
n
鈥淐lick and pop鈥?suppression circuitry
n
Thermal shutdown protection circuitry
n
n
n
n
n
n
Applications
n
Portable and Desktop Computers
n
Multimedia Monitors
n
Portable Radios, PDAs, and Portable TVs
Connection Diagram
TSSOP Package
DS101088-2
Top View
Order Number LM4836MT
See NS Package Number MTC28 for TSSOP
Order Number LM4836MTE
See NS Package Number MXA28A for Exposed DAP TSSOP
Boomer
廬
is a registered trademark of NationalSemiconductor Corporation.
漏 1999 National Semiconductor Corporation
DS101088
www.national.com

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