- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384715 > MAX9750CEUI (MAXIM INTEGRATED PRODUCTS INC) 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers PDF資料下載
參數(shù)資料
| 型號(hào)： | MAX9750CEUI |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers |
| 中文描述： | VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | 4.40 MM, MO-153AE, TSSOP-28 |
| 文件頁數(shù)： | 19/31頁 |
| 文件大?。?/td> | 673K |
| 代理商： | MAX9750CEUI |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁
M
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
19
Applications Information
BTL Speaker Amplifiers
The MAX9750/MAX9751/MAX9755 feature speaker
amplifiers designed to drive a load differentially, a con-
figuration referred to as bridge-tied load (BTL). The BTL
configuration (Figure 9) offers advantages over the sin-
gle-ended configuration, where one side of the load is
connected to ground. Driving the load differentially
doubles the output voltage compared to a single-
ended amplifier under similar conditions. Thus, the
device’s differential gain is twice the closed-loop gain
of the input amplifier. The effective gain is given by:
Substituting 2 X V
OUT(P-P)
into the following equation
yields four times the output power due to double the
output voltage:
Since the differential outputs are biased at midsupply,
there is no net DC voltage across the load. This elimi-
nates the need for DC-blocking capacitors required for
single-ended amplifiers. These capacitors can be large
and expensive, can consume board space, and can
degrade low-frequency performance.
Power Dissipation and Heat Sinking
Under normal operating conditions, the MAX9750/
MAX9751/MAX9755 can dissipate a significant amount
of power. The maximum power dissipation for each
package is given in the
Absolute Maximum Ratings
under Continuous Power Dissipation, or can be calcu-
lated 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 thin QFN package is
+42°C/W. For optimum power dissipation, the exposed
paddle of the package should be connected to the
ground plane (see the
Layout and Grounding
section).
Output Power (Speaker Amplifier)
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 power dissipation for a given V
DD
and load is
given by the following equation:
If the power dissipation for a given application exceeds
the maximum allowed for a given package, either reduce
V
DD
, increase load impedance, decrease the ambient
temperature, or add heatsinking to the device. Large
output, supply, and ground PC board traces improve the
maximum power dissipation in the package.
P
V
π
R
DISS MAX
(
DD
2
L
)
=
2
2
P
T
T
DISSPKG MAX
J MAX
(
A
JA
(
)
)
=
θ
V
V
P
V
R
RMS
OUT P P
(
2 2
2
OUT
RMS
L
=
=
)
A
R
R
VD
F
IN
= ×
2
+1
V
OUT(P-P)
2 x V
OUT(P-P)
V
OUT(P-P)
-1
Figure 9. Bridge-Tied Load Configuration
OUTPUT POWER (mW)
T
125
100
75
50
25
0.01
0.1
1
10
100
1000
0.001
0
150
V
DD
= 5V
R
L
= 16
A
V
= 3dB
OUTPUTS IN PHASE
OUTPUTS 180
°
OUT OF PHASE
Figure 10. Total Harmonic Distortion Plus Noise vs. Output Power
with Inputs In/Out of Phase (Headphone Mode)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX9750AETI | 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers |
| MAX9750AEUI | 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers |
| MAX9750BETI | 2.6W Stereo Audio Power Amplifiers and DirectDrive Headphone Amplifiers |
| MAX9759 | 3.2W, High-Efficiency, Low-EMI, Filterless, Class D Audio Amplifier |
| MAX975ESA | Octal Transparent D-type Latches With 3-State Outputs 20-LCCC -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9751ETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9751ETI+T | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9751EUI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9752AETI+ | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
| MAX9752AETI+T | 功能描述:音頻放大器 Integrated Circuits (ICs) 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。