Texas Instruments LM48310SDBD Evaluation Module LM48310SDBD/NOPB LM48310SDBD/NOPB 数据表
产品代码
LM48310SDBD/NOPB
SNAS430D – NOVEMBER 2007 – REVISED MAY 2013
LM48310
Ultra-Low EMI, Filterless, 2.6W, Mono, Class D
Audio Power Amplifier with E
2
S
Check for Samples:
1
FEATURES
DESCRIPTION
The LM48310 is a single supply, high efficiency,
2
•
Passes FCC Class B Radiated Emissions with
mono, 2.6W, filterless switching audio amplifier. The
20 inches of cable
LM48310
features
TI’s
Enhanced
Emissions
•
E
2
S System Reduces EMI while Preserving
Suppression (E
2
S) system, that features a unique
Audio Quality and Efficiency
patent-pending ultra low EMI, spread spectrum, PWM
architecture, that significantly reduces RF emissions
architecture, that significantly reduces RF emissions
•
Output Short Circuit Protection with Auto-
while preserving audio quality and efficiency. The E
2
S
Recovery
system
improves
battery
life,
reduces
external
•
Stereo Class D Operation
component count, board area consumption, system
•
No Output Filter Required
cost, and simplifying design.
•
Internally Configured Gain (12dB)
The LM48310 is designed to meet the demands of
•
Synchronizable Oscillator for Multi-Channel
portable multimedia devices. Operating from a single
Operation
5V supply, the device is capable of delivering 2.6W of
continuous output power to a 4
continuous output power to a 4
Ω
load with less than
•
Low Power Shutdown Mode
10% THD+N. Flexible power supply requirements
•
Minimum External Components
allow operation from 2.4V to 5.5V. The LM48310
•
"Click and Pop" Suppression
offers two logic selectable modulation schemes, fixed
frequency mode, and an EMI suppressing spread
frequency mode, and an EMI suppressing spread
•
Micro-Power Shutdown
spectrum
mode.
The
E
2
S
system
includes
an
•
Available in Space-Saving WSON Package
advanced, patent-pending edge rate control (ERC)
architecture
architecture
that
further
reduce
emissions
by
APPLICATIONS
minimizing the high frequency component of the
device output, while maintaining high quality audio
device output, while maintaining high quality audio
•
Mobile Phones
reproduction (THD+N = 0.03%) and high efficiency (
η
•
PDAs
= 88%). The LM48310 also features a SYNC_IN input
•
Laptops
and SYNC_OUT, which allows multiple devices to
operate
operate
with
the
same
switching
frequency,
KEY SPECIFICATIONS
eliminating
beat
frequencies
and
any
other
interference caused by clock intermodulation.
•
Efficiency at 3.6V, 400mW into 8
Ω
85% (typ)
The LM48310 features high efficiency compared to
•
Efficiency at 5V, 1W into 8
Ω
88% (typ)
conventional Class AB amplifiers, and other low EMI
•
Quiescent Power Supply Current at 5V 3.2mA
Class D amplifiers. When driving and 8
Ω
speaker
•
Power Output at V
DD
= 5V, R
L
= 4
Ω
, THD+N
≤
from a 5V supply, the device operates with 88%
10% 2.6W (typ)
efficiency at P
O
= 1W. The gain of the LM48310 is
internally set to 12dB, further reducing external
•
Power Output at V
DD
= 5V, R
L
= 8
Ω
, THD+N
≤
component count. A low power shutdown mode
10% 1.6W (typ)
reduces supply current consumption to 0.01
μ
A.
•
Shutdown current0.01
μ
A (typ)
Advanced output short circuit protection with auto-
recovery prevents the device from being damaged
during fault conditions. Superior click and pop
suppression eliminates audible transients on power-
up/down and during shutdown.
recovery prevents the device from being damaged
during fault conditions. Superior click and pop
suppression eliminates audible transients on power-
up/down and during shutdown.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2007–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.