參數(shù)資料
型號(hào)： TPA701DR
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 0.35 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8
封裝： GREEN, PLASTIC, MS-012AA, SOIC-8
文件頁(yè)數(shù)： 11/28頁(yè)
文件大小： 790K
代理商： TPA701DR
TPA701
700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
SLOS229D – NOVEMBER1998 – REVISED MAY 2003
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
headroom and thermal considerations (continued)
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 700 mW of continuous power output with 0 dB
of headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings
for the system. Using the power dissipation curves for a 5-V, 8-
system, the internal dissipation in the TPA701
and maximum ambient temperatures is shown in Table 2.
Table 2. TPA701 Power Rating, 5-V, 8-
, BTL
PEAK OUTPUT
POWER
AVERAGE OUTPUT
POWER
DISSIPATION
D PACKAGE
(SOIC)
DGN PACKAGE
(MSOP)
POWER
(mW)
AVERAGE OUTPUT
POWER
DISSIPATION
(mW)
MAXIMUM AMBIENT
TEMPERATURE
MAXIMUM AMBIENT
TEMPERATURE
700
700 mW
675
34
°C
110
°C
700
350 mW (3 dB)
595
47
°C
115
°C
700
176 mW (6 dB)
475
68
°C
122
°C
700
88 mW (9 dB)
350
89
°C
125
°C
700
44 mW (12 dB)
225
111
°C
125
°C
Table 2 shows that the TPA701 can be used to its full 700-mW rating without any heat sinking in still air up to
110
°C and 34°C for the DGN package (MSOP) and D package (SOIC) respectively.
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