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參數資料
| 型號： | TPA302D |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 0.3 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| 封裝： | GREEN, PLASTIC, MS-012AA, SOIC-8 |
| 文件頁數： | 8/25頁 |
| 文件大小： | 623K |
| 代理商： | TPA302D |
www.ti.com
APPLICATION INFORMATION
SELECTION OF COMPONENTS
Audio
Input
Bias
Control
VDD = 5 V
6
1
5
7
VO1
VO2
VDD
2
8
3
4
IN 1
BYPASS
SHUTDOWN (see Note A)
VDD/2
CI
RI
RF
CF
50 k
50 k
CB
CS
NOTE A: SHUTDOWN must be held low for normal operation and asserted high for shutdown mode.
Audio
Input
CI
RI
IN 2
RF
CF
RL
CC
Gain Setting Resistors, RF and RI
Gain + *
R
F
R
I
(1)
Effective Impedance +
R
FRI
R
F ) RI
(2)
TPA302
SLOS174C – JANUARY 1997 – REVISED JUNE 2004
Figure 42 is a schematic diagram of a typical application circuit.
Figure 42. TPA302 Typical Notebook Computer Application Circuit
The gain for the TPA302 is set by resistors RF and RI according to Equation 1.
Given that the TPA302 is an MOS amplifier, the input impedance is high; consequently, input leakage currents
are not generally a concern, although noise in the circuit increases as the value of RF increases. In addition, a
certain range of RF values is required for proper start-up operation of the amplifier. Taken together, it is
recommended that the effective impedance seen by the inverting node of the amplifier be set between 5 k
and
20 k
. The effective impedance is calculated in Equation 2.
As an example, consider an input resistance of 10 k
and a feedback resistor of 50 k. The gain of the amplifier
would be –5 and the effective impedance at the inverting terminal would be 8.3 k
, which is within the
recommended range.
16
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA302DG4 | 功能描述:音頻放大器 0.3W Stereo Audio 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 |
| TPA302DR | 功能描述:音頻放大器 0.3-W Stereo Audio Power Amplifier 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 |
| TPA302DRG4 | 功能描述:音頻放大器 0.3-W Stereo Audio Power Amplifier 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 |
| TPA302EVM | 功能描述:0.3-W STEREO AUDIO AMP EVAL MODU RoHS:是 類別:編程器，開發系統 >> 評估板 - 音頻放大器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- |
| TPA3100D2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W STEREO CLASS-D AUDIO POWER AMPLIFIER |
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