Daewoo 20V1NTS, Service Manual

Page: 42 / 46

THERAML DATA
Symbol Parameter Test concition Min. Typ. Max. Unit
V
s
Supply Voltage Range 5 18 V
I
s
Quiescent Current 23 35 mA
I
sb
Stand-By Current Pin 3 shorted to GND 0.3 mA
V
o
Quiescent Output Voltage 7.5 V
A
v
voltage Gain 31 33 dB
R
IN
Input Impedance 50 100 K
Ω
P
o
Output Power THD = 10% 2.7 3 W
THD Distortion Po = 1W 0.1 0.3 %
SVR Supply Voltage Rejection V
ripple
= 150mVrms; 50 dB
F
ripple
= 1KHz
E
I
Input Noise Voltage Rg = 10K
Ω
; BW = 20Hz to 20KHz 5 10 µV
V Stand-By Enable Voltage 1 V
16
IC DESCRIPTION
APPENDIX
ELECTRICAL CHARACTERISTICS
(Tamb = 25ºC; Vs = 14.5V; RL=8
Ω
; f=1KHz; nuless otherwise specified.)
APPLICATION HINTS :
For 14.5V supply and 8
Ω
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.
Figure1. Application Circuit
Symbol Parameter Value unit
R
th j-amb
Thermal Rasistance junction to ambient 70 ºC/W
R
th j-case
Thermal Resistance Junction to case 15 ºC/W