NEC DTA-14V4THS, Руководство по обслуживанию, Страница: 37 / 55

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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‰
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‰; BW = 20Hz to 20KHz 5 10 V
Vsb Stand-By Enable Voltage 1 V
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IC DESCRIPTION
APPENDIX
ELECTRICAL CHARACTERISTICS
(Tamb = 25…C; Vs = 14.5V; RL=8‰; f=1KHz; nuless otherwise specified.)
APPLICATION HINTS :
For 14.5V supply and 8‰ speaker application, its maximum power dissipation is about 1.8W.
Assumming that max ambient temperature is 70…C, the required thermal resistance of the device mounted on the PCB
with a dissipating area must be equal to : (150-70)/1.8 = 44.4…C/W.
Junction to pin thermal resistance of the package is about 15…C/W. That means external heat sink of about 30…C 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 …C/W
R
th j-case
Thermal Resistance Junction to case 15 …C/W