TDA7299 查看數據表（PDF） - STMicroelectronics
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TDA7299 Datasheet PDF : 7 Pages
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TDA7299
ELECTRICAL CHARACTERISTICS (continued)
(Tamb = 25°C; VS = 12V; RL = 8Ω; f = 1KHz; unless otherwise specified.)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
Pot Transient Output Power *)
Vi = 400mVp, THD < 2%, RL = 4Ω
2
W
THD Distortion
PO = 1W
1
%
SVR Supply Voltage Rejection
Vripple = 150mVrms;
Fripple = 1KHz
50
dB
EI Input Noise Voltage
Rg = 10KΩ; BW = 20Hz to 20KHz
1.5
5
µV
Vsb Stand-By Enable Voltage
*) Limited by the RTH of the package
1
V
Figure 1. Application Circuit
IN
STAND-BY
0.1µF
IN
SVR
47µF
VS
GND
VS
100µF
470µF
OUT
8Ω
VS=12V
IN
STAND-BY
0.1µF
IN
SVR
47µF
GND
470µF
OUT
8Ω
D94AU161A
APPLICATION HINTS:
For 12V supply and 8Ω speaker application, its maximum power dissipation is about 1.8W.
Assumming that max ambient temperature is 70°C. required thermal resistance of the device and heat dissipat-
ing means must be equal to (150 - 70)/1.8 = 45°C/W.
Junction to pin thermal resistance of the package is about 20°C/W. That means external heat sink of about
25°C/W is required.
Cu ground plane of PCB can be used as heat dissipating means.
Stand-By switches must be able to discharge Csvr current.
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