UTC-IC TA8207K

UNISONIC TECHNOLOGIES CO., LTD
TA8207K
LINEAR INTEGRATED CIRCUIT
LOW FREQUENCY POWER
AMPLIFIER
„
DESCRIPTION
The UTC TA8207K is an audio power IC with built-in two channels
and thermal shut down protection circuit.
The IC is developed for portable radio cassette tape recorder with
power ON/OFF switch.
„
FEATURES
*High Power : POUT=2.5W / CH (Typ.)
(VCC=9V, RL=4Ω, f=1KHz, THD=10%)
: POUT=4.6W / CH (Typ.)
(VCC=12V, RL=4Ω, f=1KHz, THD=10%)
*Low Popping Noise at Power ON
*Small Quiescent Current: ICCQ=21mA (Typ.)
(VCC=9V, VIN=0)
*Soft Clip
*Built-in Thermal Shut Down Protection Circuit
*Bast for Supply Voltage 9V, 12V
*Operation Supply Voltage Range: VCC=6-15V
„
ORDERING INFORMATION
Order Number
Lead Free
Halogen Free
TA8207KL-F12-H-T
TA8207KL-F12-H-T
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Copyright © 2012 Unisonic Technologies Co., Ltd
Package
Packing
FSIP-12H
Tube
1 of 9
QW-R107-013.D
TA8207K
„
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified)
PARAMETER
Supply Voltage
Output Current (Peak / CH)
Power Dissipation
Operating Temperature
Storage Temperature
„
SYMBOL
VCC
IO(PEAK)
PD
TOPR
TSTG
VALUE
20
2.5
12.5
-20 to + 75
-55 to + 150
ELECTRICAL CHARACTERISTICS
(VCC=9V, RL=4Ω, RG=600Ω, f=1kHz, TA=25℃, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
Quiescent Current
ICCQ
VIN=0
POUT(1)
THD=10%
Output Power
POUT(2)
VCC=12V,THD=10%
Total Harmonic Distortion
THD
POUT=0.4W / ch
RG=10kΩ
Output Noise Voltage
eN
BW=20Hz ~ 20kHz
Input Resistance
RIN
RF=120Ω
GV(1)
VOUT=0.775VRMS
Voltage Gain
GV(2)
RF=0, VOUT=0.775VRMS
RG=600Ω
Ripple Rejection Ratio
RR
Fripple=100Hz
RG=600Ω, Amp1<->2
Cross Talk
CT
VOUT=0dBm, f=1kHz
Input Offset Voltage
V6,V7
Stand-by Current
ISTDBY
SW1->OFF
„
UNIT
V
A
W
℃
℃
MIN
2.0
TYP
21
2.5
4.6
0.2
MAX
45
1.0
UNIT
mA
W
W
%
0.3
1.0
mVRMS
30
43
45
kΩ
47
dB
56.5
dB
52
dB
50
dB
30
1
60
mV
μA
10
4.5
11
8.7
12
VCC
TYPICAL DC VOLTAGE OF EACH TERMINAL (VCC=9V, TA=25℃)
TERMINAL NO.
DC Voltage
1
8.7
2
4.5
3
VCC
4
5.0
5
0.7
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6
0.03
7
0.03
8
0.7
9
GND
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TA8207K
„
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
VCC1
-
-
C11
100μF
+
+
*2
SW1
VCC2
3
+ -
6
+
B.S.1
C4
100μF
-
+
R11
120Ω
2
C6
0.15μF
-
30kΩ
RIPPLE
+
OUT - 1
RL
BIAS CIRCUIT THE
RMAL SHUT DOWN
PROTECTION CIRCUIT
IN2
*1 CIN
45Ω
8
+
R12
120Ω
C9
1000μF
+ -
+
ch - 2
10
C5
100μF
-
OUT - 2
-
+ -
7
+
C3
47μF
C8
1000μF
+ -
NF1
4
NF2
11
-
C2
47μF
ch - 1
45Ω
5
IN - 2
1
IN1
*1 CIN
C1
100μF
12
+
IN - 1
C10
1000μF
B.S.2
C7
0.15μF
RL
30kΩ
9
GND
REMARK: 1.This IC can be used without coupling capacitor (CIN). If volume slide noise occurred by input offset
voltage is undesirable, it needs to use the capacitor (CIN).
2.The condenser between the pin3 and the GND (C11) is for reducing pop noise when the power ON/OFF
switch (SW1) is set to ON/OFF.
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TA8207K
„
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
1. ADJUSTMENT OF VOLTAGE GAIN
The voltage gain GV is obtained as follows by R1, R2 and RF in Fig.1.
INPUT
6/7
R1
5/8
+
-
CNF
AMP
2/10
R2
45Ω
47μF
RF
OUTPUT
+
30kΩ
GV=20λog
RF+R1+R2
RF+R1
When RF=0Ω
GV=56.5dB(typ.)
When RF=120Ω
GV=45dB(typ.)
Reduction of GV is possible by increasing RF. However, it is recommended to use this at 40dB or over since the
feedback increase is liable to produce oscillation.
2. THERMAL SHUTDOWN CIRCUIT
The built-in thermal shut-down circuit can prevent the destruction of IC that abnormal temperature rise when the
heat radiation is insufficient. The operation temperature is set at radiation fin temperature 175℃, at this temperature
or over the bias is interrupted to prevent the destruction of IC.
3. INPUT STAGE
Below circuit shows the input circuit of this IC.
OUTPUT
Q2
-
+
30KΩ
Q3
2/10
to DRIVER
INPUT
Q1
6/7
CIN
9
GND
to BIAS
NF 5/8
It is possible that without input coupling capacitor in the input circuit by use a PNP Transistor, Q1. However, 60mV
max offset voltage is produced at pin (6) and (7). Application after checking volume slide noise is recommended. In
order to cut the volume slide noise, insert the input capacitor (CIN) in series to interrupt the DC component.
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LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION(Cont.)
4. OSCILLATION PREVENTIVE MEASURES
For oscillation preventive capacitor C6 and C7 between the output terminal and GND, polyester film capacitor is
recommended due to good characteristics for temperature and for high frequency. It is better that use this
capacitor after the temperature test to check the oscillation allowance due to the characteristics of the capacitor is
liable to be influenced by the temperature. Besides, as the position of the electrolytic capacitor has remarkable
influence on the oscillation, connect C10 to VCC as close power GND as possible.
At using this application with the voltage gain reduced, oscillation is liable to be produced. Apply the capacitor after
checking enough for its capacity, type and mounting position.
5. POWER ON/OFF SWITCH
There is power on/off switch at (3) pin. However, output power is changed by (3) pin supply voltage when(3) pin
supply voltage I not same(12) pin supply voltage, after referring to attached date, select(3) pin supply voltage.
6. INPUT VOLTAGE
When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up point is
VIN=300mVRMS (typ.): VCC=9V, RL=4Ω, f=1kHz: Enough care must be taken for this phenomenon.
7. GND LINE
GND pin is not separated for pre-GND and for PW-GND. That is liable to cause distortion and cross talk worse.
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
ICCQ,V2,V10-VCC
RL=4Ω
VIN=0
TA=25℃
12
60
10
8
40
6
4
20
2
4
8
12
16
60
50
40
30
20
10
0
0
VCC=9V
RL=4Ω
RNF=120Ω
TA=25℃
70
Voltage Gain, GV (dB)
Quiescent Current, ICCQ (mA)
Gv-f
80
80
0
20
30
1K
100
Frequency, f (Hz)
Supply Voltage, Vcc (V)
THD - POUT
10
5
THD - POUT
30
VCC=9V
RL=4Ω
RNF=120Ω
TA=25℃
Total Harmoic Distortion, THD (%)
Total Harmoic Distortion, THD (%)
30
3
f=10kHz
1
100Hz
0.5
0.3
0.1
0.01
1kHz
10
5
VCC=12V
RL=4Ω
RNF=120Ω
TA=25℃
3
f=10kHz
1
0.5
100Hz
0.3
1kHz
0.1
0.03
10K 30K 100K
3K
0.1
0.3
1
3
10
Output Power, POUT (W)
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0.01
0.03
0.1
0.3
1
3
10
Output Power, POUT (W)
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
THD - POUT
ICCQ2,V2,V10-VCC2
12
12
10
10
ICCQ2
8
8
6
6
30
10
5
3
VCC1=9V
RL=4Ω
f=1kHz
RNF=120Ω
TA=25℃
VCC2=5V
1
V2,V10
4
4
2
0
2
0
2
10
12
8
4
Supply Voltage, VCC2 (V)
14
0
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6 7 8
9
0.5
0.3
0.1
0.01
0.03
0.1
0.3
1
3
10
Output Power, POUT (W)
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LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
ICCQ,V2,V10 - TA
VCC=9V
RL=4Ω
POUT=0.4W
f=1KHz
0.5
0.4
Quiescent Current, ICCQ (mA)
Total Harmonic Distortion, THD (%)
THD - TA
0.3
0.2
0.1
0
-40
-20
0
40
20
60
80
VCC=9V
10
RL=4Ω
VIN=0
8
50
40
30
6
V2,V10
4
20
ICCQ
10
0
-40
100
-20
Ambient Temperature, TA(℃)
0
20
(1)
(2)
8
6
(3)
4
(4)
2
0
0
20
40
60
80
9
2
1
1
2
3
4
5
6
7
Total Harmoic Distortion, THD(%)
Output Voltage, POUT (W)
Output Voltage, V2,V10 (V)
Quiescent Current, ICCQ2 (mA)
3
0
Ambient Temperature, TA (℃)
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4
0
100 120 140 160 180
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0
RL=4Ω
f=1kHz
VCC=12V
5
Power Dissipation, PD (W)
10
80
60
PD - POUT
(1) INFNITE HEAT SINK
(2) 80cm2 × 2mm
AL HEAT SINK
(3) 18cm2 × 2mm
AL HEAT SINK
(4) NO HEAT SINK
12
40
Ambient Temperature, TA(℃)
PD -TA
14
Allowable Power Dissipation, PD (W)
2
Output Voltage V2,V10 (V)
„
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TA8207K
LINEAR INTEGRATED CIRCUIT
Quiescent Current, ICCQ (mA)
Total Harmonic Distortion, THD (%)
Power Dissipation, PD(W)
Allowable Power Dissipation, PD(W)
Output Voltage, V2,V10 (V)
TYPICAL CHARACTERISTICS (Cont.)
„
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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