參數(shù)資料
型號(hào)： SA58670ABS
廠商： NXP Semiconductors N.V.
元件分類(lèi)： 音頻放大器
英文描述： 2.1 W-channel stereo class-D audio amplifier
封裝： SA58670ABS<SOT917-1 (HVQFN20)|<<http://www.nxp.com/packages/SOT917-1.html<1<Always Pb-free,;
文件頁(yè)數(shù)： 8/24頁(yè)
文件大小： 169K
代理商： SA58670ABS
SA58670A_2
NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 02 — 23 October 2008
16 of 24
NXP Semiconductors
SA58670A
2.1 W/channel stereo class-D audio amplier
11. Application information
11.1 Power supply decoupling considerations
The SA58670A is a stereo class-D audio amplier that requires proper supply voltage
decoupling to ensure the rated performance for THD+N and power efciency. To decouple
high frequency transients, supply voltage spikes and digital noise on the supply voltage
bus line, a low Equivalent Series Resistance (ESR) capacitor of typically 1
F is placed as
close as possible to the PVDD pins of the SA58670A. It is important to place the
decoupling capacitor at the supply voltage pins of the SA58670A because any resistance
or inductance in the PCB trace between the SA58670A and the capacitor can cause a
loss in efciency. Additional decoupling using a larger capacitor, 4.7
F or greater, may be
done on the supply voltage connection on the PCB to lter low frequency signals. Usually
this is not required due to high PSRR of the SA58670A.
11.2 Input capacitor selection
The SA58670A does not require input coupling capacitors when used with a differential
audio source that is biased from 0.5 V to VDD 0.8 V. In other words, the input signal must
be biased within the common-mode input voltage (Vi(cm)) range. If high-pass ltering is
required or if it is driven using a single-ended source, input coupling capacitors are
required.
The 3 dB cut-off frequency created by the input coupling capacitor and the input resistors
(see Table 6) is calculated by Equation 1:
(1)
Fig 16. SA58670A application schematic
002aad665
SA58670A
OUTRP
OUTRN
10
F
1 nF
FB
1 nF
OUTLP
OUTLN
VDD
G1
VDD
PVDD
PGND
1
F
VDD
10
F
1
F
VDD
SDL
SDR
AVDD
10
F
1
F
PGND
VDD
PVDD
G0
INLP
1
F
INLN
1
F
differential inputs
left channel
INRN
1
F
INRP
1
F
differential inputs
right channel
AGND
FB
f
3dB
–
1
2
π R
i
×
C
i
×
------------------------------
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SA58670ABS,115 功能描述:音頻放大器 2.1W/CH CLASS D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
SA58670ABS115 制造商:NXP Semiconductors 功能描述:IC AUDIO AMP D 2.1W QFN-20
SA58670ABS-G 功能描述:音頻放大器 2.1W/CH CLASS D AUDIO AMP RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
SA58670BS 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:2.1 W/channel stereo class-D audio amplifier
SA58670BS,115 功能描述:音頻放大器 2.1W/CH CLASS D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)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
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