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參數資料
| 型號： | LM4843MH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | Stereo 2W Audio Power Amplifiers with DC Volume Control |
| 中文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO20 |
| 封裝： | TSSOP-20 |
| 文件頁數： | 4/19頁 |
| 文件大?。?/td> | 597K |
| 代理商： | LM4843MH |
Electrical Characteristics for Bridged Mode Operation
(Notes 7, 10) The following specifications apply for V
DD
= 5V, unless otherwise noted. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4843
Units
(Limits)
Typical
(Note 14)
10
2.2
Limit
(Note 15)
±
50
V
OS
P
O
Output Offset Voltage
Output Power
V
IN
= 0V, No Load
THD + N = 1.0%; f=1kHz; R
L
= 3
(Note 8)
THD + N = 1.0%; f=1kHz; R
L
= 4
(Note 9)
THD = 1% (max);f = 1 kHz;
R
L
= 8
THD+N = 10%;f = 1 kHz; R
L
= 8
P
O
= 1W, 20 Hz
<
f
<
20 kHz,
R
L
= 8
, A
VD
= 2
P
O
= 340 mW, R
L
= 32
C
B
= 1.0 μF, f = 120 Hz,
V
RIPPLE
= 200 mVrms; R
L
= 8
V
DD
= 5V, P
OUT
= 1.1W, R
L
= 8
,
A-Wtd Filter
f=1kHz, C
B
= 1.0 μF
mV (max)
W
2
W
1.1
1.0
W (min)
1.5
0.3
W
%
THD+N
Total Harmonic Distortion+Noise
1.0
74
%
dB
PSRR
Power Supply Rejection Ratio
SNR
Signal to Noise Ratio
93
dB
X
talk
Channel Separation
70
dB
Note 3:
The
θ
JA
given is for an MXA20A package whose exposed-DAP is soldered to an exposed 2in
2
piece of 1 ounce printed circuit board copper.
Note 4:
The
θ
given is for an MXA20A package whose exposed-DAP is soldered to a 2in
2
piece of 1 ounce printed circuit board copper on a bottom side layer
through 21 8mil vias.
Note 5:
The
θ
JA
given is for an MXA20A package whose exposed-DAP is soldered to an exposed 1in
2
piece of 1 ounce printed circuit board copper.
Note 6:
The
θ
JA
given is for an MXA20A package whose exposed-DAP is not soldered to any copper.
Note 7:
All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical application as shown
in
Figure 1
.
Note 8:
When driving 3
loads from a 5V supply the LM4843MH must be mounted to the circuit board and forced-air cooled.
Note 9:
When driving 4
loads from a 5V supply the LM4843MH must be mounted to the circuit board.
Note 10:
Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur.
Operating Ratings
indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Electrical Characteristics
state DC andAC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Marshall Chiu feels there are better ways to obtain ’More
Wattage in the Cottage.’ Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device
performance.
Note 11:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
T
A
)/
θ
JA
. For the LM4843MH, T
JMAX
= 150C, and the typical junction-to-ambient thermal resistance, when board
mounted, is 80C/W for the MHC20 package.
Note 12:
Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 13:
Machine Model, 220 pF–240 pF discharged through all pins.
Note 14:
Typicals are measured at 25C and represent the parametric norm.
Note 15:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Datasheet min/max specification limits are guaranteed by design, test, or
statistical analysis.
Note 16:
Refers only to the internal VolumeAttenuation steps. Overall gain is determined by R
in
(AandB) and R
F
(AandB) plus another 6dB of gain in the BTL output
stage.
L
www.national.com
4
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| LM4843MHX | 功能描述:IC AMP AUDIO PWR 2.2W AB 20TSSOP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻放大器 系列:Boomer® 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:H 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:35mW x 2 @ 16 歐姆 電源電壓:1.62 V ~ 1.98 V 特點:I²C，麥克風，靜音，短路保護，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) |
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| LM4844_07 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Stereo 1.2W Audio Sub-System with 3D Enhancement |
| LM4844TL/NOPB | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| LM4844TLEVAL | 功能描述:BOARD EVALUATION LM4844TL RoHS:否 類別:編程器，開發(fā)系統 >> 評估板 - 音頻放大器 系列:Boomer® 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
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