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LM4924MM Datasheet

  • LM4924MM

  • National Semiconductor [2 Cell Battery, 40mW Per Channel Ou...

  • NSC

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LM4924 2 Cell Battery, 40mW Per Channel Output Capacitor-Less (OCL) Stereo Headphone Audio
Amplifier
October 2004
LM4924
2 Cell Battery, 40mW Per Channel Output Capacitor-Less
(OCL) Stereo Headphone Audio Amplifier
General Description
The LM4924 is a Output Capacitor-Less (OCL) stereo head-
phone amplifier, which when connected to a 3.0V supply,
delivers 40mW per channel to a 16鈩?load with less than 1%
THD+N.
With the LM4924 packaged in the MM and SD packages, the
customer benefits include low profile and small size. These
packages minimizes PCB area and maximizes output power.
The LM4924 features circuitry that reduces output transients
(鈥渃licks鈥?and 鈥減ops鈥? during device turn-on and turn-off, and
Mute On and Off. An externally controlled, low-power con-
sumption, active-low shutdown mode is also included in the
LM4924. Boomer audio power amplifiers are designed spe-
cifically to use few external components and provide high
quality output power in a surface mount packages.
Key Specifications
n
n
n
n
n
OCL output power
(R
L
= 16鈩? V
DD
= 3.0V, THD+N = 1%)
40mW (typ)
Micropower shutdown current
0.1碌A(chǔ) (typ)
Supply voltage operating range
1.5V
<
V
DD
<
3.6V
PSRR 100Hz, V
DD
= 3.0V, A
V
= 2.5
66dB (typ)
Features
2-cell 1.5V to 3.6V battery operation
OCL mode for stereo headphone operation
Unity-gain stable
鈥淐lick and pop鈥?suppression circuitry for shutdown On
and Off transients
n
Active low micropower shutdown
n
Thermal shutdown protection circuitry
n
n
n
n
Applications
n
Portable two-cell audio products
n
Portable two-cell electronic devices
Typical Application
20121057
FIGURE 1. Block Diagram
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS201210
www.national.com

LM4924MM 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Class-AB

  • 0.04 W x 2 at 16 Ohms

  • 2-Channel Stereo

  • 0.1 %

  • 3 V

  • + 85 C

  • SMD/SMT

  • MSOP

  • Reel

  • 16 Ohms

  • Single

  • - 40 C

  • Single

  • Single

  • 3.6 V

  • 1.5 V

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