Daewoo Color Television Service Manual page 42

IC DESCRIPTION
THERAML DATA
Symbol
R
th j-amb
R
th j-case
ELECTRICAL CHARACTERISTICS
Symbol Parameter
V Supply Voltage Range
s
I Quiescent Current
s
I Stand-By Current
sb
V Quiescent Output Voltage
o
A voltage Gain
v
R Input Impedance
IN
P Output Power
o
THD Distortion
SVR Supply Voltage Rejection
E Input Noise Voltage
I
V Stand-By Enable Voltage
Figure1. Application Circuit
APPLICATION HINTS :
For 14.5V supply and 8 speaker application, its maximum power dissipation is about 1.8W.
Assumming that max ambient temperature is 70ºC, the required thermal resistance of the device mounted on the PCB
with a dissipating area must be equal to : (150-70)/1.8 = 44.4ºC/W.
Junction to pin thermal resistance of the package is about 15ºC/W. That means external heat sink of about 30ºC C/W is
required.
Cu ground plane of PCB can be used as heat dissipating means.
Parameter
Thermal Rasistance junction to ambient
Thermal Resistance Junction to case
(Tamb = 25ºC; Vs = 14.5V; RL=8 ; f=1KHz; nuless otherwise specified.)
Pin 3 shorted to GND
THD = 10%
Po = 1W
V
ripple
F
ripple
Rg = 10K ; BW = 20Hz to 20KHz
Value
Test concition
= 150mVrms;
= 1KHz
16
APPENDIX
unit
70 ºC/W
15 ºC/W
Min. Typ. Max.
5 18
23 35
0.3
7.5
31 33
50 100
2.7 3
0.1 0.3
50
5 10
1
Unit
V
mA
mA
V
dB
K
W
%
dB
µV
V