參數(shù)資料
型號(hào): TDA7496SSA
廠商: 意法半導(dǎo)體
英文描述: 5W+5W AMPLIFIER
中文描述: 5W 5W功放
文件頁(yè)數(shù): 9/12頁(yè)
文件大?。?/td> 535K
代理商: TDA7496SSA
9/12
TDA7496SSA
Figure 17. PIN ST-BY
Figure 18. PIN: MUTE
Figure 19. PINS: OUT R, OUT L
Figure 20. PINS: PW-GND, S-GND
10
μ
A
65K
V
S
STBY
D97AU594
200
50
μ
A
200
MUTE
D97AU592
10K
V
S
OUT
D97AU588
V
S
GND
D97AU593
V
S
HEAT SINK DIMENSIONING:
In order to avoid the thermal protection intervention, that is placed approximatively at T
j
= 150°C, it is important
the dimensioning of the Heat Sinker R
Th
(°C/W).
The parameters that influence the dimensioning are:
– Maximum dissipated power for the device (P
dmax
)
– Max thermal resistance Junction to case (R
Th j-c
)
– Max. ambient temperature T
amb max
– Quiescent current I
q
(mA)
Example:
V
CC
= 22V, R
load
= 8ohm, R
Th j-c
= 5 °C/W , T
amb max
= 50°C
P
dmax
= (N° channels) ·
P
dmax
= 2 · ( 3.0 ) + 0.5 = 6.5 W
(Heat Sinker)
In figure 21 is shown the Power derating curve for the device.
V
2
2
Π
2
R
load
------------------------------
I
q
V
cc
+
R
Th c-a
150
----------–
T
P
d max
R
Th j-c
----------–
6.5
5.0
10
°
C/W
=
=
=
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