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參數資料
| 型號： | TPA032D04DCAR |
| 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 |
| 文件頁數： | 11/26頁 |
| 文件大小： | 439K |
| 代理商： | TPA032D04DCAR |
TPA032D04
10W STEREO CLASSD AUDIO POWER AMPLIFIER
SLOS203B DECEMBER 1999 REVISED JUNE 2000
20
TI.COM
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
APPLICATION INFORMATION
class-D EVM power supply decoupling data
The decoupling capacitance required will depend upon the application. Pads and through-holes have been
provided on the EVM for the addition of bulk capacitance (see the schematic). A plot showing the impact of
various levels of bulk capacitance on the voltage ripple on the power supply line is shown in Figure 12. This ripple
is maximum at higher frequency. The figure shows worst-case voltage ripple for a 20-kHz, 10-W output into a
4-
load. In all cases, two 10-F and one 1-F ceramic chip capacitors were decoupling the power supply signal
from the EVM. The 1-
F unit was placed immediately adjacent to the IC power pins, and the 10-F units were
placed adjacent to each other a little farther out.
The upper trace shows the ripple when only these capacitors are used. The middle trace shows the impact of
an additional 330-
F aluminum electrolytic capacitor rated at 25 V, 90 m, and for 755 mA at 100 kHz. In the
bottom trace, the 330-
F capacitor was replaced by a 390-F aluminum electrolytic capacitor rated at 35 V, 65
m
, and for 1.2 A of 100 kHz ripple current.
The results indicate that for sensitive circuits where minimum voltage ripple is required, a larger bulk
capacitance with low ESR should be used. For systems that are contained and EMI is controlled, less
capacitance may be used. The difference in the level of distortion in the output signal was very small between
each level of decoupling, with the 20-
F bulk capacitance providing the least distortion. This is attributed to the
low ESR of the capacitor, which is only a few milliohms at the switching frequency of 250 kHz. The distortion
is made lower still by the parallel combination. Distortion of the output signal when only one 10-
F capacitor
is used is the same as for 20
F. The difference is more noticeable on the power supply line, though the distortion
is increased only slightly more than with the 20-
F capacitor.
V
Ripple
V
oltage
(2
V
per
division)
RIPPLE VOLTAGE
Time (10
sec per division)
cc
Figure 12. Power Supply Decoupling
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
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