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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： | 10/26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
18
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
crest factor and thermal considerations (continued)
Converting dB back into watts:
P
W + 10
PdB 10
P
ref
+ 63 mW (18-dB crest factor)
+ 125 mW (15-dB crest factor)
+ 250 mW (9-dB crest factor)
+ 500 mW (6-dB crest factor)
+ 1000 mW (3-dB crest factor)
(12)
+ 2000 mW (15-dB crest factor)
This is valuable information to consider when attempting to estimate the heat dissipation requirements for the
amplifier system. Comparing the absolute worst case, which is 2 W of continuous power output with a 3-dB crest
factor, against 12-dB and 15-dB applications drastically affects maximum ambient temperature ratings for the
system. Table 3 shows maximum ambient temperatures and TPA0233 internal power dissipation for various
output-power levels.
Table 3. TPA0233 Power Rating, 5-V, 3-
, Mono
PEAK OUTPUT POWER
(W)
AVERAGE OUTPUT POWER
POWER DISSIPATION
(W)
MAXIMUM AMBIENT
TEMPERATURE
4
2 W (3-dB crest factor)
1.7
3
°C
4
1000 mW (6-dB crest factor)
1.6
6
°C
4
500 mW (9-dB crest factor)
1.4
24
°C
4
250 mW (12-dB crest factor)
1.1
51
°C
4
125 mW (15-dB crest factor)
0.8
78
°C
4
63 mW (18-dB crest factor)
0.6
96
°C
Table 4. TPA0233 Power Rating, 5-V, 8-
, Stereo
PEAK OUTPUT POWER
(W)
AVERAGE OUTPUT POWER
POWER DISSIPATION
(W)
MAXIMUM AMBIENT
TEMPERATURE
2.5
1250 mW (3-dB crest factor)
0.55
100
°C
2.5
1000 mW (4-dB crest factor)
0.62
94
°C
2.5
500 mW (7-dB crest factor)
0.59
97
°C
2.5
250 mW (10-dB crest factor)
0.53
102
°C
The maximum dissipated power (PDmax), is reached at a much lower output power level for an 8- load than
for a 4-
load. As a result, this simple formula for calculating PDmax may be used for a 4- application.
P
Dmax +
2V2
DD
p2R
L
(13)
However, in the case of a 4-
load, the PDmax occurs at a point well above the normal operating power level.
The amplifier may therefore be operated at a higher ambient temperature than required by the PDmax formula
for a 4-
load.
The maximum ambient temperature depends on the heat sinking ability of the PCB system. The derating factor
for the DGQ package is shown in the dissipation rating table. Converting this to
ΘJA:
Θ
JA +
1
Derating Factor
+
1
0.0171
+ 58.48°C W
(14)
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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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