參數(shù)資料
型號(hào)： FAN7033MP
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 音頻／視頻放大
英文描述： 2W Stereo Power Amplifier with Fixed Gain
中文描述： 1.9 W, 2 CHANNEL, AUDIO AMPLIFIER, DSO14
封裝： 4 X 4 MM, MLP-14
文件頁(yè)數(shù)： 15/20頁(yè)
文件大?。?/td> 418K
代理商： FAN7033MP
FAN7033MP
15
Applications Information
Functional Description
The FAN7033MP is a stereo power amplifier capable of delivering 1.9W continuous RMS(Root Mean Square)
power into 4
load with 1% THD(Total Harmonic Distortion). At 10% THD, the FAN7033MP can deliver above 2W
into 4
load. The FAN7033MP has 5 supply input pins. Three among them are used for positive supply and the
rest of them is for the ground. Three positive supply input pins : pin3(PVDD2), pin10(PVDD1) and pin11(VDD) must
be tied together. To improve the cross-talk between cannels, these pins are not connected internally. Therefore,
these pins must be externally connected on the PCB. Pin 8 and the exposed pad are allocated to ground. Thus, the
exposed pad must be connected to the ground.
The FAN7033MP is provided with differential inputs. These inputs increase the common-mode noise immunity.
Furthermore, differential configuration in the input section helps to decrease total harmonic distortion and pop
noise that occurs when shutdown is released. When only single input is available, the distortion performance is
slightly degraded.
To save the standby power consumption, the FAN7033MP provides shutdown function. Putting pin14(SD) to be
low, the chip falls into shutdown mode. At this mode, it consumes micro power at the room temperature of 25°C
and this power consumption is only due to the leakage current of the chip. This leakage current is the strong func-
tion of the temperature. Thus at the high ambient temperature, the shutdown current slightly increases. The logic
threshold of shutdown pin lies nearby VDD/2. So, the logic threshold level does not follow TTL logic level. Thus,
when the users want to control the chip according to the TTL logic level, some kinds of logic-level-changing circuit
may be needed.
Operation of the Amplifier
Figure 1 shows the configuration of the single channel BTL(Bridge-Tied Load) power amplifier. To make the differ-
ential input configuration, the FAN7033MP uses several resistor networks as depicted in figure 1. For the input
resistor, 15k
is used. This resistor converts the input voltage signal to the current signal. The converted current
signal flows to the feedback resistor. For FAN7033MP, the feedback resistance is six times larger than input resis-
tance. Thus, the gain is 12(about 21.6dB). For the 5V supply, the input signal has 0.83Vpeak voltage swing makes
10Vpp output swing. The exact gain formula is given by
As shown in equation (1), for the single-ended input case, the gain is also preserved. However, to get the same
output swing with the differential input case, the input swing must be double comparing with the differential input
swing.
PCB Layout and Supply Regulation
Metal trace resistance between the BTL output and the parasitic resistance of the power supply line both heavily
Figure 1. Configuration of Power Amplifier
INN
90k
90k
90k
15k
15k
15k
15k
90k
INP
C
INN
C
INP
OUTP
OUTN
AMP1
AMP2
VDD/2
OUTP
OUTN
–
12 INP
INN
–
)
=
(1)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
FAN7033MPX 功能描述:音頻放大器 2W CMOS Stereo Power Amplifier wtih Fixed 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
FAN7040 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:3W Mono BTL Amplifier with DC Volume Control
FAN7040M 功能描述:音頻放大器 3W MONO 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
FAN7040MX 功能描述:音頻放大器 3W MONO 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
FAN7071 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Landing Correction IC
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