參數(shù)資料
型號(hào)： TDA7294HS
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 100 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
封裝： MULTIWATTH-15
文件頁(yè)數(shù)： 3/17頁(yè)
文件大?。?/td> 1464K
代理商： TDA7294HS
Figure 19: P.C.B. and Components Layout of the Circuit of figure 18 (1:1 scale)
diodes Z1,Z2 and resistors R7,R8 define the mini-
mum drop across the power MOS transistors of
the TDA7294. L1, L2, L3 and the snubbers C9,
R1 and C10, R2 stabilize the loops formed by the
"bootstrap" circuits and the output stage of the
TDA7294.
In figures 21,22 the performances of the system
in terms of distortion and output power at various
frequencies (measured on PCB shown in fig. 19)
are displayed.
The output power that the TDA7294 in high-
efficiency application is able to supply at
Vs = +40V/+20V/-20V/-40V; f =1 KHz is:
- Pout = 150 W @ T.H.D.=10 % with Rl= 4 Ohm
- Pout = 120 W @ "
= 1 % "
"
- Pout = 100 W @ "
=10 % with Rl= 8 Ohm
- Pout = 80 W @ "
= 1 % "
"
Results from efficiency measurements (4 and 8
Ohm loads, Vs =
±40V) are shown by figures 23
and 24. We have 3 curves: total power dissipa-
tion, power dissipation of the
TDA7294 and
power dissipation of the darlingtons.
By considering again a maximum average
output power (music signal) of 20W, in case
of the high efficiency application, the thermal
resistance value needed from the heatsink is
2.2
oC/W (Vs =±40 V and Rl= 4 Ohm).
All components (TDA7294 and power transistors
T1 and T2) can be placed on a 1.5
oC/W heatsink,
with the power darlingtons electrically insulated
from the heatsink.
Since the total power dissipation is less than that
of a usual class AB amplifier, additional cost sav-
ings can be obtained while optimizing the power
supply, even with a high headroom.
TDA7294
11/17
相關(guān)PDF資料
PDF描述
TDA7295S 80 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
TDA7295 80 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
TDA7296AV 30 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
TDA7296SV 60 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
TDA7296S 60 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM15
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TDA7294-HS 制造商:STMicroelectronics 功能描述:TDA7294-HS - Bulk
TDA7294S 功能描述:音頻放大器 100W Audio Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA7294S_05 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
TDA7294SV 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:100V - 100W DMOS AUDIO AMPLIFIER WITH MUTE/ST-BY
TDA7294V 功能描述:音頻放大器 100W Audio Amplifier RoHS:否 制造商:STMicroelectronics 產(chǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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