參數(shù)資料
型號: TPA321DRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: 音頻/視頻放大
英文描述: 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝: GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁數(shù): 7/29頁
文件大小: 773K
代理商: TPA321DRG4
www.ti.com
I
DD RMS +
2V
P
p
R
L
P
SUP + VDD IDD RMS +
V
DD 2VP
p
R
L
Efficiency +
P
L
P
SUP
where
P
L +
V
L RMS
2
R
L
+
Vp
2
2R
L
V
L RMS +
V
P
2
(3)
Efficiency of a BTL configuration
+
p
V
P
2V
DD
+
p
P
LRL
2
1 2
2V
DD
(4)
TPA321
SLOS312C – JUNE 2000 – REVISED JUNE 2004
APPLICATION INFORMATION (continued)
Table 1 employs Equation 4 to calculate efficiencies for three different output power levels. 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. 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.
Table 1. Efficiency vs Output Power in 3.3-V 8-
BTL Systems
PEAK-to-PEAK
INTERNAL
OUTPUT POWER
EFFICIENCY
VOLTAGE
DISSIPATION
(W)
(%)
(V)
(W)
0.125
33.6
1.41
0.26
0.25
47.6
2.00
0.29
0.375
58.3
2.45(1)
0.28
(1)
High-peak voltage values cause the THD to increase.
A final point to remember about linear amplifiers (either SE or BTL) is how to manipulate the terms in the
efficiency equation to utmost advantage when possible. Note that in Equation 4, VDD is in the denominator. This
indicates that as VDD goes down, efficiency goes up.
15
相關(guān)PDF資料
PDF描述
TPA321DG4 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA321DGNRG4 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA321DGNG4 0.7 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
TPA4411RTJR 0.1 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20
TPA4411RTJT 0.1 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA321EVM 功能描述:音頻 IC 開發(fā)工具 TPA321 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V
TPA3221DDV 功能描述:HIGH POWER AMPLIFIER 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):在售 類型:D 類 電壓 - 電源:7 V ~ 32 V 安裝類型:表面貼裝 工作溫度:0°C ~ 70°C 供應(yīng)商器件封裝:44-HTSSOP 封裝/外殼:44-TSSOP(0.240",6.10mm 寬)裸露焊盤 標(biāo)準(zhǔn)包裝:35
TPA3244DDWR 功能描述:IC AMP AUDIO CLASS D 44-HTSSOP 制造商:texas instruments 系列:- 包裝:剪切帶(CT) 零件狀態(tài):在售 類型:D 類 輸出類型:2 通道(立體聲) 不同負(fù)載時的最大輸出功率 x 通道數(shù):60W x 2 @ 8 歐姆 電壓 - 電源:12 V ~ 31.5 V 特性:消除爆音,短路保護(hù) 安裝類型:表面貼裝 工作溫度:最高 750.2°F(399°C) 供應(yīng)商器件封裝:44-HTSSOP 封裝/外殼:44-TSSOP(0.240",6.10mm 寬)裸露焊盤 標(biāo)準(zhǔn)包裝:1
TPA3244EVM 功能描述:EVAL BOARD FOR TPA3244 制造商:texas instruments 系列:PurePath? 零件狀態(tài):在售 放大器類型:D 類 輸出類型:2 通道(立體聲) 不同負(fù)載時的最大輸出功率 x 通道數(shù):100W x 2 @ 4 歐姆 電壓 - 電源:14 V ~ 31.5 V 板類型:完全填充 使用的 IC/零件:TPA3244 所含物品:板 標(biāo)準(zhǔn)包裝:1
TPA3245DDV 功能描述:IC AUDIO AMP CLASS D 44HTSSOP 制造商:texas instruments 系列:PurePath? 包裝:管件 零件狀態(tài):在售 類型:D 類 輸出類型:2 通道(立體聲) 不同負(fù)載時的最大輸出功率 x 通道數(shù):115W x 2 @ 2 歐姆,230W x 1 @ 4 歐姆 電壓 - 電源:12 V ~ 30 V 特性:消除爆音,短路和熱保護(hù) 安裝類型:表面貼裝 工作溫度:0°C ~ 70°C(TA) 供應(yīng)商器件封裝:44-HTSSOP 封裝/外殼:44-PowerTSSOP(0.240",6.10mm 寬) 標(biāo)準(zhǔn)包裝:35