- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383547 > MAX9718A (Maxim Integrated Products, Inc.) Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers PDF資料下載
參數(shù)資料
| 型號： | MAX9718A |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
| 中文描述： | 低成本，單聲道/立體聲，以1.4W差分音頻功率放大器 |
| 文件頁數(shù)： | 11/23頁 |
| 文件大小： | 569K |
| 代理商： | MAX9718A |
single-ended amplifiers. These capacitors can be
large, expensive, consume board space, and degrade
low-frequency performance.
Power Dissipation and Heat Sinking
Under normal operating conditions, the MAX9718/
MAX9719 dissipate a significant amount of power. The
maximum power dissipation for each package is given
in the
Absolute Maximum Ratings
section under
Continuous Power Dissipation or can be calculated by
the following equation:
where T
J(MAX)
is +150
°
C, T
A
is the ambient tempera-
ture, and
θ
JA
is the reciprocal of the derating factor in
°
C/W as specified in the
Absolute Maximum Ratings
section. For example,
θ
JA
of the TQFN package is
+59.2
°
C/W.
The increase in power delivered by the BTL configura-
tion directly results in an increase in internal power dis-
sipation over the single-ended configuration. The
maximum internal power dissipation for a given V
CC
and load is given by the following equation:
If the internal power dissipation for a given application
exceeds the maximum allowed for a given package,
reduce power dissipation by increasing the ground
plane heat-sinking capability and the size of the traces
to the device (see the
Layout and Grounding
section).
Other methods for reducing power dissipation are to
reduce V
CC
, increase load impedance, decrease ambi-
ent temperature, reduce gain, or reduce input signal.
Thermal-overload protection limits total power dissipa-
tion in the MAX9718/MAX9719. When the junction tem-
perature exceeds +160
°
C, the thermal protection
circuitry disables the amplifier output stage. The ampli-
fiers are enabled once the junction temperature cools
by 15
°
C. A pulsing output under continuous thermal
overload results as the device heats and cools.
For optimum power dissipation and heat sinking, con-
nect the exposed pad found on the μMAX, TDFN,
TQFN, and TSSOP packages to a large ground plane.
Fixed Differential Gain
The MAX9718B, MAX9718C, MAX9718D, MAX9719B,
MAX9719C, and MAX9719D feature internally fixed
gains (see the
Selector Guide
). This simplifies design,
decreases required footprint size, and eliminates exter-
nal gain-setting resistors. Resistors R1 and R2 shown in
the
Typical Operating Circuit
are used to achieve each
fixed gain.
Adjustable Differential Gain
Gain-Setting Resistors
External feedback resistors set the gain of the
MAX9718A and MAX9719A. Resistors R
F
and R
IN
(
Figure
2) set the gain of the amplifier as follows:
where A
V
is the desired voltage gain. Hence, an R
IN
of
10k
and an R
F
of 20k
yields a gain of 2V/V, or 6dB.
R
F
can be either fixed or variable, allowing the use of a
digitally controlled potentiometer to alter the gain under
software control.
A
R
R
V
F
IN
=
P
V
π
R
DISSPKG MAX
CC
2
L
(
)
=
2
2
P
T
T
DISSPKG MAX
J MAX
(
A
JA
(
)
)
=
θ
M
Low-Cost, Mono/Stereo,
1.4W Differential Audio Power Amplifiers
______________________________________________________________________________________
11
+1
V
OUT(P-P)
2 x V
OUT(P-P)
V
OUT(P-P)
-1
Figure 1. Bridge-Tied Load Configuration
R
F
R
F
MAX9718A
MAX9719A
BIAS
GENERATOR
INVERTING
DIFFERENTIAL
INPUT
NONINVERTING
DIFFERENTIAL
INPUT(OPTIONAL)
(OPTIONAL)
IN+
IN-
OUT+
OUT-
R
IN
R
IN
Figure
2. Setting the MAX9718A/MAX9719A Gain
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX9718AEUB | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
| MAX9718B | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
| MAX9718BEUB | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
| MAX9718C | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
| MAX9718CETB | Low-Cost, Mono/Stereo,1.4W Differential Audio Power Amplifiers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9718AEBL | 制造商:Maxim Integrated Products 功能描述:LOW-COST MONO/STEREO 1.4W DIFFERE - Rail/Tube |
| MAX9718AEBL+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 1.4W CLS-AB 9UCSP - Rail/Tube |
| MAX9718AEBL+T | 制造商:Maxim from Components Direct 功能描述:THE MAXIM MAX9718AEBL+T IS A CLASS AB PORTABLE SPEAKER AMPLI - Tape and Reel 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 1.4W CLS-AB 9UCSP - Tape and Reel 制造商:Maxim 功能描述:Maxim MAX9718AEBL+T, Audio Power Amplifier Class AB 1.4W Differential 2.7V-5.5V 9-bump USCP |
| MAX9718AEBL+TG45 | 功能描述:音頻放大器 Mono/Stereo 1.4W BTL Audio Power Amp RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9718AEBL-T | 制造商:Maxim Integrated Products 功能描述:LOW-COST, MONO/STEREO, 1.4W DIFFERENTIAL AUDI - Tape and Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。