TA8207K [UTC]
LOW FREQUENCY POWER AMPLIFIER; 低频功率放大器
| 型号： | TA8207K |
| 厂家： | 
Unisonic Technologies |
| 描述： | LOW FREQUENCY POWER AMPLIFIER |
| 文件： | 总9页 (文件大小：332K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Package
FSIP-12H
Packing
Tube
Lead Free
Halogen Free
TA8207KL-F12-H-T
TA8207KL-F12-H-T
www.unisonic.com.tw
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Copyright © 2012 Unisonic Technologies Co., Ltd
QW-R107-013.D
TA8207K
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified)
PARAMETER
SYMBOL
VCC
VALUE
20
UNIT
V
Supply Voltage
Output Current (Peak / CH)
Power Dissipation
IO(PEAK)
PD
2.5
A
12.5
W
℃
Operating Temperature
Storage Temperature
TOPR
-20 to + 75
-55 to + 150
TSTG
℃
ELECTRICAL CHARACTERISTICS
(VCC=9V, RL=4Ω, RG=600Ω, f=1kHz, TA=25℃, unless otherwise specified)
PARAMETER
Quiescent Current
SYMBOL
ICCQ
TEST CONDITIONS
MIN
2.0
TYP
21
MAX UNIT
VIN=0
45
mA
W
POUT(1)
POUT(2)
THD
THD=10%
2.5
4.6
0.2
Output Power
VCC=12V,THD=10%
POUT=0.4W / ch
RG=10kΩ
W
Total Harmonic Distortion
Output Noise Voltage
Input Resistance
1.0
%
eN
RIN
0.3
30
1.0 mVRMS
BW=20Hz ~ 20kHz
kΩ
RF=120Ω
GV(1)
GV(2)
RR
43
45
47
60
dB
dB
dB
VOUT=0.775VRMS
Voltage Gain
RF=0, VOUT=0.775VRMS
RG=600Ω
Fripple=100Hz
56.5
52
Ripple Rejection Ratio
Cross Talk
RG=600Ω, Amp1<->2
CT
50
dB
VOUT=0dBm, f=1kHz
Input Offset Voltage
Stand-by Current
V6,V7
30
1
mV
ISTDBY
SW1->OFF
μA
TYPICAL DC VOLTAGE OF EACH TERMINAL (VCC=9V, TA=25℃)
TERMINAL NO.
DC Voltage
1
2
3
4
5
6
7
8
9
10
11
12
8.7
4.5
VCC
5.0
0.7
0.03
0.03
0.7
GND
4.5
8.7
VCC
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TA8207K
LINEAR INTEGRATED CIRCUIT
TEST CIRCUIT
VCC1
SW1
C11
C10
1000μF
100μF
*2
VCC2
3
12
B.S.1
1
C8
1000μF
+
IN1
-
C4
100μF
IN - 1
6
5
+
OUT - 1
-
+
*1
CIN
ch - 1
45Ω
NF1
2
-
R11
120Ω
C6
C1
100μF
RL
0.15μF
30kΩ
BIAS CIRCUIT THE
RMAL SHUT DOWN
RIPPLE
4
PROTECTION CIRCUIT
C3
47μF
C9
+
-
IN2
1000μF
7
8
+
IN - 2
-
+
*1
CIN
ch - 2
-
10
11
45Ω
OUT - 2
RL
C5
100μF
C7
0.15μF
R12
120Ω
NF2
C2
B.S.2
47μF
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
OUTPUT
2/10
6/7
+
AMP
R1
RF
-
5/8
R2
45Ω
30kΩ
RF+R1+R2
RF+R1
GV=20λog
When RF=0Ω
When RF=120Ω
GV=56.5dB(typ.)
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
30KΩ
Q3
Q2
2/10
to DRIVER
INPUT
6/7
-
+
Q1
CIN
to BIAS
9
GND
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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TA8207K
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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TA8207K
TYPICAL CHARACTERISTICS
LINEAR INTEGRATED CIRCUIT
ICCQ,V2,V10-VCC
Gv-f
80
70
80
VCC=9V
RL=4Ω
RL=4Ω
VIN=0
TA=25℃
60
R
NF=120Ω
60
12
10
TA=25℃
50
40
8
6
4
2
40
30
20
20
0
10
0
4
8
12
0
16
20
30
100
1K 3K
10K 30K 100K
Frequency, f (Hz)
Supply Voltage, Vcc (V)
THD - POUT
THD - POUT
30
30
VCC=9V
RL=4Ω
NF=120Ω
VCC=12V
RL=4Ω
10
R
10
RNF=120Ω
TA=25℃
TA=25℃
5
3
5
3
f=10kHz
f=10kHz
1
1
0.5
0.3
100Hz
1kHz
100Hz
0.5
0.3
0.1
1kHz
0.1
0.01 0.03
0.1
0.3
1
3
10
0.01 0.03
0.1
0.3
1
3
10
Output Power, POUT (W)
Output Power, POUT (W)
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TA8207K
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
THD - POUT
ICCQ2,V2,V10-VCC2
30
10
12
10
12
10
VCC1=9V
RL=4Ω
ICCQ2
5
3
f=1kHz
8
6
8
6
RNF=120Ω
TA=25℃
8
VCC2=5V
6
7
9
1
V2,V10
4
4
2
0
0.5
0.3
2
0
0.1
0.01 0.03
0.1
0.3
1
3
10
10
12
0
2
4
8
14
Output Power, POUT (W)
Supply Voltage, VCC2 (V)
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TA8207K
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
THD - TA
ICCQ,V2,V10 - TA
VCC=9V
RL=4Ω
OUT=0.4W
f=1KHz
VCC=9V
RL=4Ω
VIN=0
0.5
0.4
0.3
0.2
0.1
0
50
40
30
20
10
0
10
P
8
6
V2,V10
4
ICCQ
2
0
40
-20
80
-40
0
20
60
100
40
-20
80
-40
0
20
60
Ambient Temperature, TA(℃)
Ambient Temperature, TA(℃)
PD - POUT
PD -TA
14
12
(1)
RL=4Ω
f=1kHz
(1) INFNITE HEAT SINK
VCC=12V
5
4
3
(2) 80cm2 × 2mm
AL HEAT SINK
(3) 18cm2 × 2mm
AL HEAT SINK
(4) NO HEAT SINK
10
(2)
8
6
4
9
(3)
(4)
2
1
0
2
0
180
120 140 160
100
0
20 40
80
60
1
4
0
2
3
5
6
7
Ambient Temperature, TA (℃)
Output Voltage, POUT (W)
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TA8207K
LINEAR INTEGRATED CIRCUIT
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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