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參數資料
| 型號： | MXF10A |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1W Monaural, 85mW Stereo Headphone Audio Amplifier |
| 中文描述： | 1W的單聲道，85mW立體聲耳機音頻放大器 |
| 文件頁數： | 1/15頁 |
| 文件大?。?/td> | 384K |
| 代理商： | MXF10A |
LM4914
1W Monaural, 85mW Stereo Headphone Audio Amplifier
General Description
The unity-gain stable LM4914 is both a mono differential
output (for bridge-tied loads, or BTL) audio power amplifier
and a single-ended (SE) stereo headphone amplifier. Oper-
ating on a single 5V supply, the mono BTL mode delivers 1W
into an 8
load. In SE stereo mode, the amplifier delivers
85mW to 32
loads. The LM4914 features circuitry that
suppresses output transients ("clicks and pops").
The LM4914 is designed for notebook and other handheld
portable applications. It delivers high quality output power
from a surface-mount package and requires few external
components. The LM4914 is pin and functionally compatible
with the TPA0253.
Other features include an active-low micro-power shutdown
mode and thermal shutdown protection.
The LM4914 is available in a space efficient 10-lead
exposed-DAP TSSOP package.
Key Specifications
j
BTL output power (R
L
= 8
)
V
DD
= at 3.0V, THD = 0.1%
V
DD
= at 5.0V, THD = 0.1%
j
SE output power (R
L
= 32
)
V
DD
= at 3.0V, THD = 0.1%
V
DD
= at 5.0V, THD = 0.1%
330mW (typ)
1W (typ)
30mW (typ)
85mW (typ)
j
Micro-power shutdown supply current
j
PSRR (f = 1kHz)
V
DD
= at 3.0V, BTL Mode
V
DD
= at 5.0V, BTL Mode
0.03μA (typ)
52dB (typ)
52dB (typ)
Features
n
Advanced "click and pop" suppression circuitry
n
Stereo headphone amplifier mode
n
Low current micro-power shutdown mode
n
Thermal shutdown protection circuitry
n
2.5V to 5.5V operation
n
Unity-gain stable
n
Gain set with external resistors
n
Space-saving exposed-DAP TSSOP package
Applications
n
PDAs
n
Cellular phones
n
Handheld portable electronic devices
Connection Diagram
200634A0
Top View
Order Number LM4914MH
See NS package Number MXF10A
Boomer
is a registered trademark of National Semiconductor Corporation.
March 2003
L
2003 National Semiconductor Corporation
DS200634
www.national.com
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