- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98269 > TPA032D04DCARG4 (TEXAS INSTRUMENTS INC) 10 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO48 PDF資料下載
參數(shù)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(shù)： | 9/26頁 |
| 文件大?。?/td> | 439K |
| 代理商： | TPA032D04DCARG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第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
TPA032D04
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS203B DECEMBER 1999 REVISED JUNE 2000
18
TI.COM
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
APPLICATION INFORMATION
losses in a real-world class-D amplifier (continued)
Losses due to rise and fall times are called switching losses. A diagram of the output, showing switching losses,
is shown in Figure 10.
tSWon
+
tSWoff =
tSW
1
f
SW
Figure 10. Output Switching Losses
Rise and fall times are greater than zero for several reasons. One is that the output transistors cannot switch
instantaneously because (assuming a MOSFET) the channel from drain to source requires a specific period
of time to form. Another is that transistor gate-source capacitance and parasitic resistance in traces form RC
time constants that also increase rise and fall times.
Switching losses are constant at all output power levels, which means that switching losses can be ignored at
high power levels in most cases. At low power levels, however, switching losses must be taken into account
when calculating efficiency. Switching losses are dominated by conduction losses at the high output powers,
but should be considered at low powers. The switching losses are automatically taken into account if you
consider the quiescent current with the output filter and load.
class-D effect on power supply
Efficiency calculations are an important factor for proper power supply design in amplifier systems. Table 2
shows Class-D efficiency at a range of output power levels (per channel) with a 1-kHz sine wave input. The
maximum power supply draw from a stereo 10-W per channel audio system with 4-
loads and a 12-V supply
is almost 26 W. A similar linear amplifier such as the TPA032D04 has a maximum draw of greater than 50 W
under the same circumstances.
Table 2. Efficiency vs Output Power in 12-V 4-
H-Bridge Systems
Output Power (W)
Efficiency (%)
Peak Voltage (V)
Internal Dissipation (W)
0.5
41.7
2
0.7
2
66.7
4
1.0
5
75.1
6.32
1.66
8
78
8
2.26
10
77.9
8.94
2.84
High peak voltages cause the THD to increase
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPA102DGNR | 0.07 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA102DGN | 0.07 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA102DGNG4 | 0.07 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA102DGNRG4 | 0.07 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TPA112DR | 0.07 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(chǎn)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(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 |
| TPA100RL | 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 |
| TPA102 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:150-mW STEREO AUDIO POWER AMPLIFIER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。