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參數資料
| 型號： | TPA032D04DCARG4 |
| 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： | PLASTIC, HTSSOP-48 |
| 文件頁數： | 7/26頁 |
| 文件大小： | 439K |
| 代理商： | TPA032D04DCARG4 |
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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| 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:保險絲 TELPOWER ALARM FUSE RoHS:否 制造商:Littelfuse 產品:Surface Mount Fuses 電流額定值:0.5 A 電壓額定值:600 V 保險絲類型:Fast Acting 保險絲大小/組:Nano 尺寸:12.1 mm L x 4.5 mm W 安裝風格: 端接類型:SMD/SMT 系列:485 |
| TPA100 | 功能描述:TVS 二極管 - 瞬態電壓抑制器 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 |
| TPA100RL | 功能描述:TVS 二極管 - 瞬態電壓抑制器 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 |
| TPA102 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:150-mW STEREO AUDIO POWER AMPLIFIER |
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