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參數資料
| 型號： | SSM2301 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Filterless High Efficiency Mono 1.4 W Class-D Audio Amplifier |
| 中文描述： | 濾波高效單聲道1.4 W功率，D類音頻放大器 |
| 文件頁數： | 1/19頁 |
| 文件大小： | 334K |
| 代理商： | SSM2301 |
Filterless High Efficiency Mono 1.4 W
Class-D Audio Amplifier
Preliminary Technical Data
SSM2301
FEATURES
Filterless Class-D amplifier with built-in output stage
1.4 W into 8 Ω at 5.0 V supply with less than 1% THD
85% efficiency at 5.0 V, 1.4 W into 8 Ω speaker
Better than 98 dB SNR (signal-to-noise ratio)
Single-supply operation from 2.5 V to 5.0 V
20 nA ultralow shutdown current
Short-circuit and thermal protection
Available in 8-lead, 3 mm × 3 mm LFCSP
Pop-and-click suppression
Built-in resistors reduce board component count
Fixed and user-adjustable gain configurations
APPLICATIONS
Mobile phones
MP3 players
Portable gaming
Portable electronics
Educational toys
GENERAL DESCRIPTION
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
2006 Analog Devices, Inc. All rights reserved.
www.analog.com
The SSM2301 is a fully integrated, high efficiency, Class-D audio
amplifier. It is designed to maximize performance for mobile
phone applications. The application circuit requires a minimum
of external components and operates from a single 2.5 V to 5.0 V
supply. It is capable of delivering 1.4 W of continuous output
power with less than 1% THD + N driving an 8 Ω load from a
5.0 V supply.
The SSM2301 features a high efficiency, low noise modulation
scheme that does not require any external LC output filters. The
modulation continues to provide high efficiency even at low
output power. It operates with 85% efficiency at 1.4 W into 8 Ω
from a 5.0 V supply and has a signal-to-noise ratio (SNR) that is
better than 93 dB. Spread-spectrum modulation is used to
provide lower EMI-radiated emissions compared with other
Class-D architectures.
The SSM2301 has a micropower shutdown mode with a
maximum shutdown current of 30 nA. Shutdown is enabled by
applying a logic low to the SD pin.
The device also includes pop-and-click suppression circuitry.
This minimizes voltage glitches at the output during turn-on
and turn-off, thus reducing audible noise on activation and
deactivation.
The fully differential input of the SSM2301 provides excellent
rejection of common-mode noise on the input. Input coupling
capacitors can be omitted if the dc input common-mode voltage
is approximately V
DD
/2.
The SSM2301 also has excellent rejection of power supply noise,
including noise caused by GSM transmission bursts and RF
rectification. PSRR is typically 63 dB at 217 Hz.
The gain can be set to 6 dB or 12 dB utilizing the gain control
select pin connected respectively to ground or V
DD
. Gain can
also be adjusted externally by using an external resistor.
The SSM2301 is specified over the comercial temperature range
(40
°
C to +85
°
C). It has built-in thermal shutdown and output
short-circuit protection. It is available in an 8-lead, 3 mm × 3 mm
lead-frame chip scale package (LFCSP).
FUNCTIONAL BLOCK DIAGRAM
0.1μF
VBATT
2.5V TO 5.0V
SHUTDOWN
GAIN
CONTROL
FET
DRIVER
MODULATOR
VDD
GND
OSCILLATOR
POP/CLICK
SUPRESSION
OUT+
OUT–
BIAS
IN+
IN–
GAIN
10μF
0.01μF
1
1
INPUT CAPS ARE OPTIONAL IF INPUT DC COMMON-MODE
VOLTAGE IS APPROXIMATELY V
DD
/2.
0.01μF
1
SD
AUDIO IN–
AUDIO IN+
SSM2301
0
Figure 1.
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相關代理商/技術參數 |
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| SSM2301_01 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Filterless High Efficiency Mono 1.4W Class-D Audio Amplifier |
| SSM2301CPZ-R2 | 功能描述:IC AMP AUDIO 1.52W MONO D 8LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:DirectDrive® 類型:D 類 輸出類型:1-通道（單聲道），帶立體聲耳機 在某負載時最大輸出功率 x 通道數量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:消除爆音，差分輸入，I²C，靜音，關閉，音量控制 安裝類型:表面貼裝 供應商設備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱:MAX97000EWA+T-ND |
| SSM2301CPZ-REEL | 功能描述:IC AMP AUDIO 1.52W MONO D 8LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標準包裝:2,000 系列:- 類型:AB 類 輸出類型:2 通道（立體聲） 在某負載時最大輸出功率 x 通道數量:- 電源電壓:4 V ~ 18 V 特點:- 安裝類型:通孔 供應商設備封裝:8-DIP 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 |
| SSM2301CPZ-REEL7 | 功能描述:IC AMP AUDIO 1.52W MONO D 8LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標準包裝:1 系列:- 類型:AB 類 輸出類型:耳機，2-通道（立體聲） 在某負載時最大輸出功率 x 通道數量:30mW x 2 @ 32 歐姆 電源電壓:2.7 V ~ 5.5 V 特點:3D，低音提升，無噪音，熱保護，關斷 安裝類型:表面貼裝 供應商設備封裝:20-QFN（3x3） 封裝/外殼:20-WFQFN 裸露焊盤 包裝:Digi-Reel® 其它名稱:706-1163-6 |
| SSM2301-EVALZ | 制造商:Analog Devices 功能描述:Evaluation Board For Filterless Class-D Audio Amplifier 制造商:Analog Devices 功能描述:EVAL BD - Bulk 制造商:Analog Devices 功能描述:Class-D Audio Amplifier Eval. Board |
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