- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98268 > TPA0212PWPR (TEXAS INSTRUMENTS INC) 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPA0212PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| 封裝： | POWERPAD, PLASTIC, HTSSOP-24 |
| 文件頁數(shù)： | 18/35頁 |
| 文件大小： | 662K |
| 代理商： | TPA0212PWPR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當(dāng)前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁
www.ti.com
Efficiency of a BTL amplifier +
P
L
P
SUP
Where:
P
L +
V
Lrms
2
R
L
, and V
LRMS +
V
P
2
, therefore, P
L +
V
P
2
2 R
L
and PSUP + VDD IDDavg
and
I
DDavg +
1
p
0
V
P
R
L
sin(t) dt
+ *
1
p
V
P
R
L
[cos(t)]
p
0
+
2V
P
p
R
L
Therefore,
P
SUP +
2 V
DD VP
p
R
L
substituting PL and PSUP into the equation,
Efficiency of a BTL amplifier +
V
P
2
2 R
L
2 V
DD VP
p
R
L
+
p
V
P
4 V
DD
V
P +
2 P
L RL
Where:
(7)
PL = Power delivered to load
PSUP = Power drawn from power supply
VLRMS = RMS voltage on BTL load
RL = Load resistance
hBTL +
p
2 P
L RL
4 V
DD
Therefore,
VP = Peak voltage on BTL load
IDDavg = Average current drawn from the power supply
VDD = Power supply voltage
ηBTL = Efficiency of a BTL amplifier
(8)
TPA0212
SLOS284B – NOVEMBER 1999 – REVISED NOVEMBER 2004
Table 3 employs Equation 8 to calculate efficiencies for four different output power levels. Note that the efficiency
of the amplifier is quite low for lower power levels and rises sharply as power to the load is increased resulting in
a nearly flat internal power dissipation over the normal operating range. Note that the internal dissipation at full
output power is less than in the half power range. Calculating the efficiency for a specific system is the key to
proper power supply design. For a stereo 1-W audio system with 8-
loads and a 5-V supply, the maximum draw
on the power supply is almost 3.25 W.
Table 3. EFFICIENCY VS OUTPUT POWER IN 5-V, 8-
BTL SYSTEMS
OUTPUT POWER
EFFICIENCY
PEAK VOLTAGE
INTERNAL DISSIPATION
(W)
(%)
(V)
(W)
0.25
31.4
2.00
0.55
0.50
44.4
2.83
0.62
1.00
62.8
4.00
0.59
1.25
70.2
4.47(1)
0.53
(1)
High peak voltages cause the THD to increase.
25
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA0212PWP | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0212PWPRG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0222PWPG4 | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0222PWPR | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
| TPA0222PWP | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPA0212PWPRG4 | 功能描述:音頻放大器 Stereo Class-AB w/Ster Hdphn Drive 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 |
| TPA0213 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER WITH HEADPHONE DRIVE |
| TPA0213_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2-W MONO AUDIO POWER AMPLIFIER WITH HEADPHONE DRIVE |
| TPA0213DGQ | 功能描述:音頻放大器 Mono Class-AB w/Ster Hdphn Drive 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 |
| TPA0213DGQG4 | 功能描述:音頻放大器 Mono Class-AB w/Ster Hdphn Drive 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 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。