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參數資料
| 型號： | TPA0233DGQR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 2 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | GREEN, PLASTIC, MSOP-10 |
| 文件頁數： | 11/26頁 |
| 文件大小： | 711K |
| 代理商： | TPA0233DGQR |
TPA0233
2W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS278D JANUARY 2000 REVISED NOVEMBER 2002
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
crest factor and thermal considerations (continued)
To calculate maximum ambient temperatures, first consider that the numbers from the dissipation graphs are
per channel so the dissipated power needs to be doubled for two channel operation. Given
ΘJA, the maximum
allowable junction temperature, and the total internal dissipation, the maximum ambient temperature can be
calculated with the following equation. The maximum recommended junction temperature for the TPA0233 is
150
°C. The internal dissipation figures are taken from the Power Dissipation vs Output Power graphs.
T
A Max + TJ Max * ΘJA PD
+ 150 * 58.48(0.8
2)
+ 56°C (15-dB crest factor)
(15)
NOTE:
Internal dissipation of 0.8 W is estimated for a 2-W system with 15-dB crest factor per channel.
Tables 3 and 4 show that for some applications no airflow is required to keep junction temperatures in the
specified range. The TPA0233 is designed with thermal protection that turns the device off when the junction
temperature surpasses 150
°C to prevent damage to the IC. Tables 3 and 4 were calculated for maximum
listening volume without distortion. When the output level is reduced the numbers in the table change
significantly. Also, using 8-
speakers dramatically increases the thermal performance by increasing amplifier
efficiency.
ST/MN (stereo/mono) operation
The ability of the TPA0233 to easily switch between mono BTL and stereo SE modes is one of its most important
cost saving features. This feature eliminates the requirement for an additional headphone amplifier in
applications where an internal speaker is driven in BTL mode but external stereo headphone or speakers must
be accommodated. When ST/MN is held high, the RIN and LIN inputs drive the output as Lo and Ro in stereo
SE mode. When ST/MN is held low, the inputs are summed internally and the output is driven as Mo+ and Mo
in mono BTL mode. Control of the ST/MN input can be from a logic-level CMOS source or, more typically, from
a switch-controlled resistor divider network as shown in the functional block diagram.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPA0233DGQRG4 | 功能描述:音頻放大器 Mono Class-AB w/Ster Hdphn Drv Summed Inp 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 |
| TPA0233EVM | 功能描述:音頻 IC 開發工具 TPA0233 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TPA0233G | 制造商:ON Semiconductor 功能描述:THY T0220 SPECIAL SCR |
| TPA0234G | 功能描述:SCR THY C77 SPECIAL SCR RoHS:否 制造商:STMicroelectronics 最大轉折電流 IBO:480 A 額定重復關閉狀態電壓 VDRM:600 V 關閉狀態漏泄電流（在 VDRM IDRM 下）:5 uA 開啟狀態 RMS 電流 (It RMS): 正向電壓下降:1.6 V 柵觸發電壓 (Vgt):1.3 V 最大柵極峰值反向電壓:5 V 柵觸發電流 (Igt):35 mA 保持電流（Ih 最大值）:75 mA 安裝風格:Through Hole 封裝 / 箱體:TO-220 封裝:Tube |
| TPA0242 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO 2-W AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL AND MUX CONTROL |
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