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零件编号 | KIA6221AH | ||
描述 | 30W BTL DUAL AUDIO POWER AMPLIFIER | ||
制造商 | KEC | ||
LOGO | |||
1 Page
SEMICONDUCTOR
KIA6221AH
TECHNICAL DATA
BIPOLAR LINEAR INTEGRATED CIRCUIT
30W BTL DUAL AUDIO POWER AMPLIFIER
The thermal resistance 0 j - c of KIA6221AH package
CPP-17 (Compact Power Package 17pin), designed for
low thermal resistance, has high efficiency of heat
radiation.
The temperature rise of chip can be reduced, and
the influence from the degradation of the features due
to the temperature rise at the high output can also be
reduced.
This stereo audio power IC, designed for car audio
use, has two built-in channels to reduce the
characteristic difference between L and R channels.
FEATURES
* Low Thermal Resistance
: 6 j-c=1.5°C/W (Infinite heat sink)
* High Power
:POUT( 1)=30W(Typ. )/Channel
(Vcc=14.4V, f=lkHz, THD=10%, RL=2&)
:POUT(2)=26W(Typ. )/Channel
(Vcc=13.2V, f=lkHz, THD=10%, RL=2&)
;POUT(3)=19W(Typ. )/Channel
(Vcc=13.2V, f=lkHz, THD=10%, RL=4&)
* Low Distortion
:THD=0.04%(Typ.) (VCc=13.2V, f=lkHz, POUT=1W, R l = 4 & , Gv=50dB)
* Low Noise
rms (Typ.)
(Vcc=13.2V, RL=4 Q, Gv=50dB, Rg=0&, BW=20Hz~ 20kHz)
* Built-in stand-by function (With @ pin set at LOW, Power is turned OFF.)
:IsB=ljuA(Typ.)
* Built-in various protection circuits
Protection circuits : thermal shut down, over voltage, Out—>Vcc short.
Out^GND short and OUT-OUT short.
* Operating supply voltage : Vcc=9~18V
CPP-17
1994. 10 .25
Revision No : 0
KEC
1/13
KIA6221AH
5. Muting Function
Through setting 0 pin (mute terminal)at about IV or less, muting becomes possible.
The interval circuit of IC is shown in fig.4.
When 0 pin is set to LOW, Ql and Q2 are turned to ON, the charge of the ripple
condenser is discharged and the bias is cut. The mute amount of 60dB
or over can be obtained.
Since this muting function rapidly discharge the charge of the ripple filter
capacitor of (8) pin, the pop noise is generated by the DC fluctuation of
the bias section.
Therefore, this muting function is not
appropriate to the audio muting but
Fig.5 Mute Circuit
6. Rapid Ripple Discharging Circuit at the Time of Vcc OFF
This circuit is effective in such a mode where the Vcc and the Stand-by terminals
become high/low simultaneously ; for instance, for pop noise produced when the
power is turned ON/OFF repeatedly by operating the ignition key.
RIP
MUTE
Q 2 Q3 1J
Fig. 6
1 — VCC
v c c OFF
DETECTION CIRCUIT
( VCC * TV)
-Power Stage Bias Cut
If Vcc is OFF, Vcc ^ 7 V is detected internally on IC and
(1) The power stage bias circuit is cut, and
(2) (8) pin : Ripple capacitor is rapidly discharged by turning Q3 ON and then Ql
and Q2 ON.
1994. 10 .25
Revision No : 0
KEC
8/13
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页数 | 13 页 | ||
下载 | [ KIA6221AH.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
KIA6221AH | 30W BTL DUAL AUDIO POWER AMPLIFIER | KEC |
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