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參數(shù)資料
| 型號： | MAX9719BETE+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 3/27頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO PWR 1.4W AB 16TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 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(shù)量： | 1.4W x 2 @ 4 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，差分輸入，關(guān)閉，熱保護 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 16-TQFN-EP（4x4） |
| 封裝/外殼： | 16-WQFN 裸露焊盤 |
| 包裝： | 管件 |
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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 TJ(MAX) is +150°C, TA is the ambient tempera-
ture, and
θJA is the reciprocal of the derating factor in
°C/W as specified in the
Absolute Maximum Ratings
section. For example,
θJA 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 VCC
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 VCC, 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 MAX, TDFN,
TQFN, and TSSOP packages to a large ground plane.
Fixed Differential Gain
The MAX9718B/E, MAX9718C/F, MAX9718D/G,
MAX9719B, MAX9719C, and MAX9719D feature inter-
nally fixed gains (see the
Selector Guide). This simpli-
fies design, decreases required footprint size, and
eliminates external gain-setting resistors. Resistors R1
and R2 shown in the Functional Diagrams are used to
achieve each fixed gain.
Adjustable Differential Gain
Gain-Setting Resistors
External feedback resistors set the gain of the
MAX9718A/H and MAX9719A. Resistors RF and RIN
(Figure 2) set the gain of the amplifier as follows:
where AV is the desired voltage gain. Hence, an RIN of
10k
and an RF of 20k yields a gain of 2V/V, or 6dB.
RF can be either fixed or variable, allowing the use of a
digitally controlled potentiometer to alter the gain under
software control.
A
R
V
F
IN
=
P
V
R
DMAX
CC
L
() =
2
π
P
TT
DMAX
JMAX
A
JA
()
=
θ
MAX9718/MAX9719
Low-Cost, Mono/Stereo,
1.4W Differential Audio Power Amplifiers
______________________________________________________________________________________
11
+1
VOUT(P-P)
2 x VOUT(P-P)
VOUT(P-P)
-1
Figure 1. Bridge-Tied Load Configuration
RF
MAX9718A/H
MAX9719A
BIAS
GENERATOR
INVERTING
DIFFERENTIAL
INPUT
NONINVERTING
DIFFERENTIAL
INPUT (OPTIONAL)
(OPTIONAL)
IN+
IN-
OUT+
OUT-
RIN
Figure 2. Setting the MAX9718A/H/MAX9719A Gain
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9719BETE+ | 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 |
| MAX9719BETE+T | 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 |
| MAX9719BETE-T | 功能描述:音頻放大器 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 |
| MAX9719BEUE | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9719BEUE+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 2CH STEREO 1.4W CLS-AB 16TSSOP EP - Rail/Tube |
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