UNISONIC TECHNOLOGIES CO., LTD
TA7368P
0.6W AUDIO POWER
AMPLIFIER
DESCRIPTION
The UTC
TA7368P
is suitable for the audio power amplifier
of portable cassette tape recorder and radio.
LINEAR INTEGRATED CIRCUIT
FEATURES
* Very Few External Components(Only Three Capacitors)
* Low Quiescent Current
* High Voltage Gain: Gv=40dB
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
TA7368PL-D08-T
TA7368PG-D08-T
TA7368PL-G09-T
TA7368PG-G09-T
TA7368PL-R10-R
TA7368PG-R10-R
TA7368PL-R10-T
TA7368PG-R10-T
TA7368PL-S08-R
TA7368PG-S08-R
Package
DIP-8
SIP-9
SSOP-10
SSOP-10
SOP-8
Packing
Tube
Tube
Tape Reel
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
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QW-R107-009,E
TA7368P
PIN CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
SOP-8/DIP-8
SIP-9
PWR-GND
PRE-GND
RIPPLE
PHASE
SSOP-10
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www.unisonic.com.tw
P
OUT
V
CC
NC
V
IN
NF
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TA7368P
BLOCK DIAGRAMS
LINEAR INTEGRATED CIRCUIT
Note: Pin connection
DIP-8/SOP-8: PIN
⑧
:V
CC
SIP-9: PIN
⑧
: NC, PIN
⑨
:V
CC
Note: Pin connection for SSOP-10 package only.
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www.unisonic.com.tw
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QW-R107-009,E
TA7368P
ABSOLUTE MAXIMUN RATINGS
(Ta=25°C)
PARAMETER
SYMBOL
V
CC
LINEAR INTEGRATED CIRCUIT
RATINGS
UNIT
Supply Voltage
14
V
DIP-8
900
Power Dissipation
P
D
mW
SIP-9
950
SOP-8/SSOP-10
400
Operating Temperature
T
OPR
-20 ~ +75
°C
Storage Temperature
T
STG
-55 ~ +150
°C
Note: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. Derated Ta>25°C, in the proportion of 7.2mW/°C
ELECTRONIC CHARACTERISTICS
(Ta=25°C, Vcc=6V, f=1kHz, Rg=600Ω, R
L
=4Ω, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
V
CC
=3V,V
IN
=0
Quiescent Circuit Current
I
CCQ
V
CC
=9V,V
IN
=0
V
CC
=14V,V
IN
=0
Voltage Gain
G
V
V
IN
=0.5mVrms
V
CC
=3V,R
L
=4Ω,THD=10%
Output Power
P
OUT
V
CC
=6V,R
L
=4Ω,THD=10%
V
CC
=9V,R
L
=8Ω,THD=10%
Total Harmonic Distortion
THD P
OUT
=100mW
Output Noise Voltage
eN
R
G
=10kΩ,BPF=20Hz~20kHz
Ripple Rejection
RR
f
R
=100Hz, V
R
=0.3Vrms,Crip=0
Input Resistance
R
IN
MIN
TYP
5.5
6.6
7.5
40
120
720
1100
0.3
0.2
25
27
MAX
18
21
43
UNIT
mA
dB
mW
1
0.5
%
mVrms
dB
kΩ
37
500
800
TERMINAL DC VOLTAGE
Typical terminal voltage at no signal with test circuit (V
CC
=6V, Ta=25°C)
Pin No.
DC Voltage(V)
1
0
2
2.4
3
0.62
4
0.64
5
0
6
0
7
2.61
8
NC
9
6
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www.unisonic.com.tw
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QW-R107-009,E
TA7368P
PRECAUTION FOR APPLICATION
LINEAR INTEGRATED CIRCUIT
1. Input stage (Figure 1)
The input stage of power amplifier is comprised of a PNP differential pair( Q2 and Q3) preceded by a PNP emitter
follower(Q1) which allows DC referencing of the source signal to GND. This eliminates the need for an input coupling
capacitor. However, in case the brush noise of volume becomes a problem, provide serially a coupling capacitor to
the input side.
2. Adjustment of the voltage gain (Figure 2)
The voltage gain is fixed at Gv=40dB by the resistors( R4 and R5) in IC. Its reduction is possible through adding Rf
as shown in Figure 2. In this case, the voltage gain is obtained by the following equation:
Gv=20log(R5+R4+Rf)/(R4+Rf). It is recommended to use this IC with the voltage gain of Gv=28dB or over.
Figure 1
Figure 2
Figure 3
3. Ripple Rejection (Figure 3)
Adding Crip, to the ripple terminal 2 as shown in Figure 3, the ripple rejection ratio is improved from -25dB to -45dB.
4. Power dissipation
Casre should be taken to use IC below maximum power dissipation because it may be over maximum rating
depending on operating condition.
Pd=900mW (Ta=25°C)
5. Phase-compensation
Small temperature coefficient and excellent frequency characteristics is needed by capacitor below:
*Oscillation preventing capacitor for power amplifier output
*Bypass capacitor for ripple filter
*Capacitor between Vcc and GND
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www.unisonic.com.tw
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QW-R107-009,E
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