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KIA6248K Schematic ( PDF Datasheet ) - KEC

Teilenummer KIA6248K
Beschreibung 7.3W DUAL AUDIO POWER IC
Hersteller KEC
Logo KEC Logo 




Gesamt 8 Seiten
KIA6248K Datasheet, Funktion
SEMICONDUCTOR
TECHNICAL DATA
KIA6248K
BIPOLAR LINEAR INTEGRATED CIRCUIT
7.3W DUAL AUDIO POWER IC
The KIA6248K is dual audio power amplifier
for application.
It contains various kind of protectors and the
function of stand-by switch.
FEATURES
* Output Power
: PouTd)=7.3W(Typ.)
(Vcc=13.2V, R l = 2 Q , f=lkHz, THD=10%)
: PouT(2)=6.4W(Typ.)
(VCc=14.4V, RL=4£, f=lkHz, THD=10%)
: PouT(3)=5.3W(Typ.)
(VCc=13.2V, RL=4£, f=lkHz, THD=10%)
* Total Harmonic Distortion
: THD=0.1%(Typ.)
(VCc=13.2V, RL=4£, f=lkHz, P 0 U T = 1 W )
* Built-in Stand-by Switch Function
: ISTBY=l//A(Typ.)
(With (9) pin set at High, power is turned ON.)
* Built-in Various Protection Circuits
: OVER Voltage, Thermal Shut Down
Out to GND, out to Vcc Short
* Built-in Junction Temperature Detection Function
(Pin ® : 10mW/°C)
* Operation supply voltage range : V c c = 6 ~ 1 8 V .
DIM
A
B
C
D
d
HI
H2
L
P
Q
s
T
MILLIMETERS
30.0± 0.2
3.0±0.3
15.7± 0.2
o.ato.i
0.6± 0.1
14.5± 0.3
17.7± 0.3
3.5± 0.3
2.0
3.7± 0.2
15.0± 0.2
0.6+0.1/—0.05
HSIP-15
1999. 2. 1
Revision No : 1
KEC
1/8






KIA6248K Datasheet, Funktion
KIA6248K
3. Preventive Measure Against Oscillation
Cose : For preventing the oscillation, it is advisable to use Cose, the condenser of polyester film
having small characteristic fluctuation of the temperature and the frequency.
The resistance R to be series applied to Cose is effective for phase correction of high
frequency, and improves the oscillation allowance.
(1) Voltage gain to be used (Gy Setting)
(2) Capacity value of condenser
(3) Kind of condenser
(4) Layout of printed board
In case of its use with the voltage gain Gy reduced or with the feedback amount increased,
care must be taken because the phase-inversion is caused by the high frequency resulting in
making the oscillation liable generated.
4. Junction Temperature Detecting pin ®
Using temperature characteristic of a band gap circuit and in proportion to junction temperature,
pin® DC voltage : V2 rises at about +10mV/°C temperature characteristic. So, the relation between
V2 at Tj=25°C and V2X at Tj=x°C is decided by the following expression :
T(x°C)
=
V2X + V2(25°C)
10mV/°C
+
25(°C)
In deciding a heat sink size, a junction termperature can be
easily made clear by measuring voltage at this pin while a
backside temperature of IC was so far measured using a
thermocouple type thermometer.
+ 10mV/"C
25° C
5CC
(Fig.4)
5. Pop Noise
The pop noise is reduced by the time constant r of pin® : smoothing.
Therefore, we recommend Cs=100//F, which is between pin® and GND, because the pop noise will
become worse by using the smaller capacity of Cs.
C s = 100/i,F : RECOMMENDED
1 11 11 11
Smiall I3op Nois e
VALUE
«//Outj)Ut I)C V(altag e V0u t ( d
Outj)Ut i^C V<Dltage V0UT(A
r
OUTPUT DC VOLTAGE 2 V / D I V , 2 0 m s / D I V
OUTPUT AC VOLTAGE 1V/DIV, 2 0 m s / D I V
C s = 10/xF : LESS THAN
VALUE
1 11 11 11
Lar,ge F'op Nois e
RECOMMENDED
OutjDUt I)C V<Dltag e V0u t ( d C)
\)
OutjDUt I^C VcDltag e V0u t ( a 'C)
Vw/
I
OUTPUT DC VOLTAGE 2 V / D I V , 2 0 m s / D I V
OUTPUT AC VOLTAGE 1V/DIV, 2 0 m s / D I V
1999. 2. 1
Revision No : 1
l/Cr
6/8

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