參數(shù)資料
型號： TS4982IQT
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 2 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC32
封裝： 5 X 5 MM, ROHS COMPLIANT, QFN-32
文件頁數(shù)： 9/31頁
文件大?。?/td> 537K
代理商： TS4982IQT
TS4982
Application information
Doc ID 14527 Rev 2
17/31
Bridge tied load (BTL) means that each end of the load is connected to two single-ended
output amplifiers. Therefore, we have:
Single-ended output 1 = Vout1 =Vout
Single-ended output 2 = Vout2 =-Vout
BTL output = Vout1 -Vout2 =2Vout
The output power is:
For the same power supply voltage, the output power in a BTL configuration is four times
higher than the output power in a single-ended configuration.
4.3
Power dissipation and efficiency
Hypotheses:
The voltage and current in the load are sinusoidal (Vout and Iout).
The supply voltage is a pure DC source (Vcc).
Regarding the load we have:
and
Therefore, the average current delivered by the supply voltage is:
Figure 39.
Current delivered by power supply voltage
P
out
2V
outRMS
()
2
R
L
-------------------------------------
=
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)
Icc (t)
Time
T/2
T
Vpeak/R
L
Icc
AVG
03T/2
2T
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4984 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2 x 1W Stereo audio power amplifier with active low standby mode
TS4984EIJT 功能描述:音頻放大器 2x1.2W stereo audio 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
TS4984EIKJT 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode
TS4984FC 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.2W Stereo Audio Power Amplifier with Active Low Standby Mode
TS4984IQT 功能描述:音頻放大器 2x1W stereo 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
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