參數(shù)資料
型號(hào)： TPA032D04DCAG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48
封裝： GREEN, PLASTIC, HTSSOP-48
文件頁(yè)數(shù)： 7/26頁(yè)
文件大?。?/td> 439K
代理商： TPA032D04DCAG4
TPA032D04
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS203B DECEMBER 1999 REVISED JUNE 2000
16
TI.COM
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
APPLICATION INFORMATION
the ideal class-D amplifier (continued)
Given these plots, the efficiency of the class-D device can be calculated and compared to an ideal linear
amplifier device. In the derivation below, a sine wave of peak voltage (VP) is the output from an ideal class-D
and linear amplifier and the efficiency is calculated.
V
L(rms) +
V
P
2
CLASS-D
LINEAR
V
L(rms) +
V
P
2
P
L + VL
I
L
Average I
DD +
I
L(rms)
V
L(rms)
V
DD
P
L +
V
L(rms)
2
R
L
+
V
P
2
2R
L
Average I
DD +
2
p
V
P
R
L
P
SUP +
V
DD
Average I
DD
P
SUP +
V
DD
Average I
DD +
V
DD VP
R
L
2
p
P
SUP +
V
DD
I
L(rms)
V
L(rms)
V
DD
Efficiency
+ h +
P
L
P
SUP
Efficiency
+ h +
P
L
P
SUP
Efficiency
+ h + V
DD
V
P
2
2R
L
2
p
V
P
R
L
Efficiency
+ h + 1
Efficiency
+ h + p
4
V
P
V
DD
In the ideal efficiency equations, assume that VP = VDD, which is the maximum sine wave magnitude without
clipping. Then, the highest efficiency that a linear amplifier can have without clipping is 78.5%. A class-D
amplifier, however, can ideally have an efficiency of 100% at all power levels.
The derivation above applies to an H-bridge as well as a half-bridge. An H-bridge requires approximately twice
the supply current but only requires half the supply voltage to achieve the same output power—factors that
cancel in the efficiency calculation. The H-bridge circuit is shown in Figure 8.
VDD
VOUT
L
CL
RL
IL
IOUT
+
VA
M2
M1
VDD
L
CL
M4
M3
Figure 8. H-Bridge Class-D Output Stage
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPA032D04DCAR 功能描述:音頻放大器 Ster Med Pwr Cls-D w/Ster Hdphn Driver 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
TPA032D04DCARG4 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-W STEREO CLASS-D AUDIO POWER AMPLIFIER
TPA032D04EVM 制造商:Texas Instruments 功能描述:EVAL KIT FOR 10-W STEREO CLS-D AUD PWR AMP - Bulk
TPA-10 功能描述:保險(xiǎn)絲 TELPOWER ALARM FUSE RoHS:否 制造商:Littelfuse 產(chǎn)品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險(xiǎn)絲類型:Fast Acting 保險(xiǎn)絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風(fēng)格: 端接類型:SMD/SMT 系列:485
TPA100 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 100V 50uA Bidirect RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C
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