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參數資料
| 型號： | TPA2016D2RTJR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2.8 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC20 |
| 封裝： | 4 X 4 MM, GREEN, PLASTIC, QFN-20 |
| 文件頁數： | 22/38頁 |
| 文件大小： | 1216K |
| 代理商： | TPA2016D2RTJR |
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EFFICIENCY AND THERMAL INFORMATION
100°C/W
(7)
JA
DMAX
T
P
C
A
J
Max =
Max -
= 150 - 100 (0.4) = 110
q
°
(8)
OPERATION WITH DACS AND CODECS
FILTER FREE OPERATION AND FERRITE BEAD FILTERS
Ferrite
ChipBead
Ferrite
ChipBead
1nF
OUTP
OUTN
www.ti.com........................................................................................................................................................ SLOS524D – JUNE 2008 – REVISED AUGUST 2009
The maximum ambient temperature depends on the heat-sinking ability of the PCB system. The derating factor
for the packages are shown in the dissipation rating table. Converting this to
θ
JA for the WCSP package:
Given
θ
JA of 100°C/W, the maximum allowable junction temperature of 150°C, and the maximum internal
dissipation of 0.4 W (0.2 W per channel) for 1.5 W per channel, 8-
load, 5-V supply, from Figure 15, the
maximum ambient temperature can be calculated with the following equation.
Equation 8 shows that the calculated maximum ambient temperature is 110°C at maximum power dissipation
with a 5-V supply and 8-
a load. The TPA2016D2 is designed with thermal protection that turns the device off
when the junction temperature surpasses 150°C to prevent damage to the IC. Also, using speakers more
resistive than 8-
dramatically increases the thermal performance by reducing the output current and increasing
the efficiency of the amplifier.
In using Class-D amplifiers with CODECs and DACs, sometimes there is an increase in the output noise floor
from the audio amplifier. This occurs when mixing of the output frequencies of the CODEC/DAC mix with the
switching frequencies of the audio amplifier input stage. The noise increase can be solved by placing a low-pass
filter between the CODEC/DAC and audio amplifier. This filters off the high frequencies that cause the problem
and allow proper performance. See the functional block diagram.
A ferrite bead filter can often be used if the design is failing radiated emissions without an LC filter and the
frequency sensitive circuit is greater than 1 MHz. This filter functions well for circuits that just have to pass FCC
and CE because FCC and CE only test radiated emissions greater than 30 MHz. When choosing a ferrite bead,
choose one with high impedance at high frequencies, and low impedance at low frequencies. In addition, select a
ferrite bead with adequate current rating to prevent distortion of the output signal.
Use an LC output filter if there are low frequency (< 1 MHz) EMI sensitive circuits and/or there are long leads
from amplifier to speaker. Figure 42 shows typical ferrite bead and LC output filters.
Figure 42. Typical Ferrite Bead Filter (Chip bead example: TDK: MPZ1608S221A)
Copyright 2008–2009, Texas Instruments Incorporated
29
Product Folder Link(s): TPA2016D2
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA2016D2RTJT | 功能描述:音頻放大器 1.7-W/Ch St Class-D Audio Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2016D2V1YZHR | 制造商:Texas Instruments 功能描述: |
| TPA2016D2YZHR | 功能描述:音頻放大器 1.7W/Ch Stereo Class D Aud Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2016D2YZHT | 功能描述:音頻放大器 1.7W/Ch Stereo Class D Aud Amp RoHS:否 制造商:STMicroelectronics 產品: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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| TPA2016DYZHT2 | 制造商:Texas Instruments 功能描述: |
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