參數(shù)資料
型號(hào): TS4990EIKJT
廠商: STMICROELECTRONICS
元件分類: 音頻/視頻放大
英文描述: 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝: ROHS COMPLIANT, FCP-9
文件頁數(shù): 11/32頁
文件大?。?/td> 797K
代理商: TS4990EIKJT
TS4990
Application information
19/31
The graph in Figure 60 shows an example of Cin and Cfeed influence.
Figure 60.
Frequency response gain vs. Cin & Cfeed
4.4
Power dissipation and efficiency
Hypotheses:
Load voltage and current are sinusoidal (Vout and Iout).
Supply voltage is a pure DC source (VCC).
The load can be expressed as:
and
Therefore, the average current delivered by the supply voltage is:
The power delivered by the supply voltage is:
Therefore, the power dissipated by each amplifier is:
Pdiss = Psupply - Pout (W)
10
100
1000
10000
-25
-20
-15
-10
-5
0
5
10
Rin = Rfeed = 22k
Ω
Tamb = 25
°C
Cfeed = 2.2nF
Cfeed = 680pF
Cfeed = 330pF
Cin = 470nF
Cin = 82nF
Cin = 22nF
G
a
in
(dB
)
Frequency (Hz)
V
out = VPEAK sin ωt
(V)
I
out =
V
out
R
L
-------------
(A)
P
out =
V
PEAK
2
2R
L
-------------------------
(W)
I
CC
AVG
=
2
V
PEAK
πR
L
----------------------
(A)
P
supply
V
CC
I
CC
AVG
(W)
=
P
diss
22V
CC
π R
L
---------------------- P
out Pout
=
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4990EKIJT 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2 W audio power amplifier with active low standby mode
TS4990ID 功能描述:音頻放大器 1.2W audio Pwr 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
TS4990IDT 功能描述:音頻放大器 1.2W audio Pwr 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
TS4990IJT 制造商:ST 功能描述:1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE
TS4990IQT 功能描述:音頻放大器 1.2W audio pow. 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