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參數(shù)資料
| 型號： | TS4956EIJT |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.055 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| 封裝： | ROHS COMPLIANT, FCP-18 |
| 文件頁數(shù)： | 33/55頁 |
| 文件大?。?/td> | 1711K |
| 代理商： | TS4956EIJT |
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TS4956
Application information
39/55
4.1.4
BTL output configuration (modes 1, 2, 7)
In a BTL (bridge tied load) output configuration (modes 1, 2 and 4), active outputs are
biased to the VCC/2 voltage. All other inactive outputs are in the high impedance state
except for the MLO output, which is biased to VCC/2 voltage.
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 (V)
single-ended output 2 = Vout2 = -Vout (V)
and
Vout1 - Vout2 = 2Vout (V)
For the same power supply voltage, the output voltage amplitude is twice as high as the
output voltage in the single-ended or phantom ground configurations and the output power
is four times higher than the output power in the single-ended or phantom ground
configurations.
4.2
Power limitation in the phantom ground configuration
A power limitation is imposed on the headphones in mode 3 and 4. Limitation of output
power is achieved by limiting the output voltage and output current on each amplifier.
The maximum value of the output voltage, Vout max, is set to a value of 1.65 V in order to
reach a maximum output power of the sinusoidal signal of around 40 mW per channel with a
32
Ω load resistance and THD+N<1%.
The maximum value of output current Iout max is set to value 70 mA in order to reach a
maximum output power of the sinusoidal signal of around 40 mW per channel with a 16
Ω
load resistance and THD+N<1%. Figure 48 on page 25 shows the functionality of the power
limitation with different load resistances.
The maximum output power with these voltage and current limitations is reached with load
values above 16
Figure 123. Voltage and current limitation on headphones
Vout
Iout
Vpeak
MAX=1.65V
Ipeak
MAX=70mA
RL=16 Ohms
RL=32 Ohms
RL=24 Ohms
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| TS4956EIKJT | 1.055 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| TS4956EKIJT | 1.06 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA18 |
| TS4961TIQT | 1.5 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC16 |
| TS4962EIJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4962EIKJT | 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TS4956EIKJT | 功能描述:音頻放大器 Stereo Audio Amp System 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 |
| TS4961TIQT | 功能描述:音頻放大器 MONO CLASS D 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 |
| TS4962 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier |
| TS4962_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8W filter-free mono class D audio power amplifier |
| TS4962_10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:2.8 W filter-free mono class D audio power amplifier |
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