TA2145AF [TOSHIBA]
3 V Stereo Headphone Amplifier (3 V USE); 3 V立体声耳机放大器（ 3 V使用）
| 型号： | TA2145AF |
| 厂家： | 
TOSHIBA |
| 描述： | 3 V Stereo Headphone Amplifier (3 V USE) |
| 文件： | 总17页 (文件大小：296K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
TA2145AF
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2145AF
3 V Stereo Headphone Amplifier (3 V USE)
The TA2145AF is developed for play-back stereo headphone
equipments (3 V USE).
It is built in dual preamplifiers, dual OCL power amplifiers,
motor governor, DC volume control and preamplifier on/off switch
etc.
Features
·
Built-in preamplifier
Input coupling condenser-less
Built-in input capacitor for reducing buzz noise
Weight: 0.32 g (typ.)
Low noise: V = 1.2 µVrms (typ.)
ni
Preamplifier on/off switch.
Built-in power amplifier
·
OCL (Output condenser-less)
Voltage gain: G = 31 dB (typ.)
V
·
·
Built-in motor governor (Current proportion type)
Built-in DC volume control function
ATT = 82dB (Ta = 25°C, typ.)
·
·
Built-in bass boost function
Low supply current (V
= 3 V, f = 1 kHz, PRE OUT = 100 mVrms, Ta = 25°C, typ.)
CC
Quiescent supply current
PRE + PW: I = 8.5 mA
·
·
·
CCQ
= 2.5 mA
GVN: I
CC
0.1 mW × 2 ch output
I
I
= 9.8 mA (R = 32 Ω)
CC1
CC2
L
= 10.5 mA (R = 16 Ω)
L
0.5 mW × 2 ch output
I
= 14.0 mA (R = 32 Ω)
L
CC3
CC4
I
= 16.5 mA (R = 16 Ω)
L
·
Operating supply voltage range (Ta = 25°C)
V
= 1.8~3.6 V
CC (opr)
GVN V
= 2.1~3.6 V (Motor voltage = 1.8 V)
CC (opr)
1
2002-04-19
TA2145AF
Block Diagram
M
PRE:
OFF
PRE
OUT
PW
RF
IN
PRE
SW
GVN
GVN
CTL
GVN
OUT
V
IN
B
NF
V
R
t
REF
B
CC
IN
B
V
B
CC
24
23
22
21
20
19
18
17
16
15
14
13
RIPPLE PRE
FILTER SW
PRE
B
VOL.
V
REF
VOL.
PW
PW
PW
C
B
A
VOL.
PRE
A
CONTROL
1
2
3
4
5
6
7
8
9
10
11
12
PRE
GND
IN
A
NF
PRE
OUT
PW
IN
V
OUT
OUT
OUT
C
PW
IN
PW
GVN
A
CTL
B
A
C
GND
GND
A
A
OUT
OUT
OUT
A
C
B
R
R
L
BST SW
BST: OFF
V
L
REF
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2002-04-19
TA2145AF
Terminal Explanation (Terminal Voltage: Typical terminal voltage at no signal with test
circuit, V = 3 V, Ta = 25°C)
CC
Terminal
Voltage
(v)
Terminal
Function
Internal Circuit
No.
1
Name
The GND, except for power drive
stage and motor governer stage.
PRE GND
¾
0
2
23
3
IN
A
B
RF
Input of preamplifier
1.2
500 W
500 W
3
2
IN
NF
NF
A
B
NF of preamplifier
1.2
V
REF
22
4
21
7
PRE OUT
PRE OUT
A
Output of preamplifier
Output of power amplifier
V
CC
B
4
1.2
OUT
OUT
OUT
B
A
C
8
9
5
5
PW IN
A
B
RF
Input of power amplifier
1.2
V
REF
20
PW IN
V
CC
V
REF
6
V
The terminal of DC volume control
¾
CTL
6
3
2002-04-19
TA2145AF
Terminal
Voltage
(v)
Terminal
Name
Function
Internal Circuit
No.
20 kW
V
REF
10
10
PW IN
Input of center amplifier
1.2
C
30 kW
V
REF
2 kW
11
12
PW GND
GND for power drive stage
¾
¾
0
0
GVN GND
GND for motor governor stage
M
13
14
15
GVN OUT
GVN CTL
Rt
Motor terminal
¾
16 15 14
13
The terminal of motor speed control
¾
The terminal of amateur
compensation resistor
¾
16
17
GVN V
V
V
for motor governor stage
for preamplifier stage and
3
3
CC
CC
CC
V
¾
CC
power amplifier stage.
18
Muting switch of preamplifier
Preamp. on: “L” level/open
Preamp. off: “H” level
18
PRE SW
¾
Refer to application note
4
2002-04-19
TA2145AF
Terminal
Voltage
(v)
Terminal
Name
Function
Internal Circuit
No.
19
RF IN
Ripple filter of power supply
2.5
19
24
V
CC
Reference voltage
24
V
1.2
REF
Preamplifier and power amplifier
operate on this reference.
5
2002-04-19
TA2145AF
Application Note
·
V
and GND
CC
This IC has two VCC terminals and three GND terminals. Pattern layout should be designed carefully to
reduce the common impedance.
·
V
CC
V
(pin 17) ----------------- Preamplifier stage and power amplifier stage.
CC
GVN V
(pin 16) --------- Motor governor stage.
CC
·
GND
PRE GND (pin 1)------------Preamplifier stage, and power amplifier stage except for the power drive stage.
PW GND (pin 11) -----------Power drive stage of power amplifier.
GVN GND (pin 12) ---------Motor governor stage.
·
·
·
V
REF
It is necessary to stabilize the V
circuit, because the internal circuit operate on this reference.
REF
RF IN
As this terminal is an input terminal of the ripple filter, it cannot supply a power supply to other ICs etc.
Preamplifier
Input signal should be applied to V
standard, otherwise pop noise become bigger when V
is turned on
CC
REF
and off.
Power amplifier
·
It is necessary to insert the coupling capacitor through the PW IN terminal. In case that DC current or DC
voltage is applied to the PW IN terminal, the internal circuit has unbalance and the power amplifier doesn’t
operate normally.
·
·
Operating supply voltage range of motor governor stage
As for the minimum of operating supply voltage range, the motor voltage is 1.8 V.
In case that it is more than 1.8 V, the low voltage performance becomes bad.
PRE SW sensitivity (Ta = 25°C)
PRE SW
4
3.6 V
“H”
PRE AMP: OFF
3
3.0 V
2
1.8 V
1.5 V
1.2 V
1
0.5 V
0
1.5
2.0
2.5
3.0
3.5
4.0
Supply voltage
V
(V)
CC
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2002-04-19
TA2145AF
Maximum Ratings (Ta = 25°C)
Characteristic
Supply voltage
Symbol
Rating
Unit
V
V
4
400
CC
(Note 1)
(Note 2)
Power dissipation
P
mW
D
925
Output current (PW AMP.)
Output current (GVN)
Operating temperature
Storage temperature
I
200
mA
mA
°C
O (PW)
I
700
O (GVN)
T
-25~75
-55~150
opr
T
°C
stg
Note 1: IC only: Derated above Ta = 25°C in the proportion 3.2 mW/°C
Note 2: IC + PCB (TOSHIBA typical PCB): Derated above Ta = 25°C in the proportion7.4 mW/°C
7
2002-04-19
TA2145AF
Electrical Characteristics
(Unless otherwise specified, V = 3 V, Ta = 25°C, f = 1 kHz, SW2: a, SW5: OPEN
CC
Preamplifier:
Power amplifier: R = 600 W, R = 16 W, Vol.: max, SW1: OPEN, SW3: a, SW4: a
R = 2.2 kW, R = 10 kW, SW1: ON, SW3: b, SW4: b
g L
g
L
Motor governor: I = 100 mA, SW1: OPEN, SW3: b, SW4: b)
m
Test
circuit
Characteristic
Symbol
Test condition
Min
Typ.
7.5
Max
13
Unit
mA
Pre off, V = 0, Vol.: min,
SW4: b, SW5: ON
in
I
I
¾
¾
CCQ1
CCQ2
Quiescent supply current
¾
¾
¾
¾
¾
V
V
V
= 0, Vol.: min, SW4: b
= -10dBV, SW2: b
= -10dBV
¾
¾
8.5
86
14.5
¾
in
o
Open loop voltage gain
Closed loop voltage gain
Maximum output voltage
Total harmonic distortion
G
G
dB
dB
VO
VC
om
¾
35
¾
o
V
THD = 1%
= -10dBV
550
¾
720
0.02
¾
mVrms
%
THD1
V
0.3
o
R = 2.2 kW, SW1: OPEN
BPF = 20 Hz~20 kHz,
g
Equivalent input noise
voltage
V
¾
¾
1.2
2.4
mVrms
ni
NAB (G = 35dB, f = 1 kHz)
V
Cross talk
CT1
RR1
¾
¾
V
= -10dBV
¾
¾
70
48
¾
¾
dB
dB
o
Ripple rejection ratio
f = 100 Hz, V = -20dBV
r r
Preamplifier muting
attenuation
ATT1
¾
V = -10dBV, SW5: OPEN ® ON
o
¾
80
¾
dB
Preamplifier on voltage
Preamplifier off voltage
Voltage gain
V
¾
¾
¾
¾
¾
¾
¾
0
1.5
29
¾
¾
31
0
0.5
1.8
33
V
V
18 (ON)
V
= 1.8 V
CC
V
18 (OFF)
G
V = -10dBV
dB
dB
mW
mW
%
V
o
Channel balance
CB
V = -10dBV
-1.5
17
+1.5
¾
o
Output power 1
P
P
R = 16 W, THD = 10%
28
20
0.5
o1
o2
L
Output power 2
R = 32 W, THD = 10%
¾
¾
L
Total harmonic distortion
THD2
P = 1m W
¾
¾
o
R = 600 W, SW3: b
BPF = 20 Hz~20 kHz
g
Output noise voltage
V
¾
¾
270
400
mVrms
no
Ripple rejection ratio
Cross talk
RR2
CT2
¾
¾
f = 100 Hz, V = -20dBV
¾
¾
52
32
¾
¾
dB
dB
r
r
V = -10dBV
o
Dc volume maximum
attenuation
V = -10dBV, SW4: a®b
(Vol.: max ® min)
o
ATT2
¾
¾
82
¾
dB
Supply current
I
¾
¾
¾
I
I
I
= 0
¾
¾
2.5
¾
3.5
0.5
mA
V
CC
m
m
m
Saturation voltage
Reference voltage
V
= 200 mA
= 100 mA
CE (sat)
,V
0.76
0.81
0.86
V
REF
Reference voltage
fluctuation 1
,V
,V
,V
¾
¾
¾
V
= 2.1~3.6 V
CC
¾
¾
¾
0.25
0.003
0.005
¾
¾
¾
%/V
%/mA
%/°C
REF1
Reference voltage
fluctuation 2
I
= 25~250 mA
m
REF2
Reference voltage
fluctuation 3
Ta = -25~75°C
REF3
K
Current ratio
¾
¾
¾
¾
¾
34.5
¾
37.5
0.25
40.5
¾
Current ratio fluctuation 1
Current ratio fluctuation 2
Current ratio fluctuation 3
,K1
V
= 2.1~3.6 V
%/V
%/mA
%/°C
CC
,K2
,K3
I
= 25~250 mA
¾
0.08
¾
m
Ta = -25~75°C
¾
0.005
¾
8
2002-04-19
TA2145AF
Test Circuit
Rg = 600 W
(a)
V
CC
PW IN
B
SW3b
(b)
V
REF
600 W
PRE OUT
B
V
REF
SW2b
(b) (a)
220 mF
22 mF
18 kW
47 mF
180 W
PRE IN
B
8200 pF
5 W
SW1b
470 W
470 kW
SW5
1 mF
3.6 kW 5 kW
470 kW
24
23
IN
22
21
20
19
18
17
16
GVN
15
14
GVN GVN
CTL OUT
13
V
NF
B
PRE
OUT
PW RF IN PRE PW
Rt
REF
B
PRE SW1a
IN
B
SW
V
V
CC
B
CC
IN
A
TA2145AF
PRE
GND
1
PRE
OUT
4
PW
PW
PW
GND GND
11 12
GVN
IN
NF
3
V
OUT OUT OUT
B A C
IN
A
5
IN
C
10
A
A
CTL
6
A
2
7
8
9
470 kW
470 kW
PW OUT
PW OUT
PW OUT
A
C
B
R
L
22 mF 470 W
(b) (a)
8200 pF
SW4
(a) (b)
220 mF
18 kW
R
L
SW2a
10 kW
Rg = 600 W
(a)
SW3a
PRE OUT
A
600 W
(b)
PW IN
A
V
REF
V
REF
9
2002-04-19
TA2145AF
Characteristic Curves (Unless otherwise specified, V = 3 V, Ta = 25°C, f = 1 kHz,
CC
Preamplifier:
R = 2.2 kW, R = 10 kW
g
L
Power amplifier: R = 600 W, R = 16 W, Vol. = max
g
L
Motor governor: I = 100 mA)
m
I
, I
– V
V
– V
O (DC) CC
CCQ CC
CC
16
12
8
2.5
2.0
1.5
1.0
I
I
(PRE + PW, Vol.: min)
CCQ1
CCQ2
V
REF
, PW OUT, PRE OUT
(PW only, Vol.: min)
4
I
(GVN: I = 0)
CC
m
0.5
0
0
0
1.5
2.0
2.5
3.0
3.5
4.0
0
1.5
2.0
2.5
3.0
3.5
4.0
Supply voltage
V
(V)
Supply voltage
V
(V)
CC
CC
PRE
G
VO
, G – f
PRE
CT – f
VC
100
80
40
50
60
70
80
V
= -10dBV
o
V
= -10dBV
o
G
VO
60
40
G
VC
20
0
10
100
1 k
Frequency
10 k
100 k
10
100
1 k
Frequency
10 k
100 k
f
(Hz)
f
(Hz)
PRE
V
– V
PRE
THD – V
o
om
CC
1000
500
THD = 1%
10
3
1
f = 10 kHz
f = 100 Hz
3
200
100
0.1
f = 1 kHz
0.03
0.01
0
1.5
2.0
2.5
3.0
3.5
4.0
1
10
100
1000
(mVrms)
10000
Supply voltage
V
(V)
Output voltage
V
o
CC
10
2002-04-19
TA2145AF
PRE
V
– V
PRE
RR – V
CC
ni
CC
20
10
20
30
f
= 100 Hz
r
V
r
= -20dBV
10
5
40
50
60
2
1
70
80
0.5
0
1.5
2.0
2.5
3.0
3.5
4.0
100 k
4.0
0
1.5
2.0
2.5
3.0
3.5
4.0
Supply voltage
V
(V)
Supply voltage
V
(V)
CC
CC
PW
G
– f
PW
CT – f
V
60
50
40
30
20
V
= -10dBV
o
V
o
= -10dBV
0
10
BST = ON
20
30
40
BST = ON
BST = OFF
BST = OFF
50
60
20
100
1 k
10 k
20
100
1 k
Frequency
10 k
(Hz)
100 k
Frequency
f
(Hz)
f
PW
P – V
o
PW
THD – P
o
CC
100
30
10
V
R
= 3 V
CC
THD = 10%
= 16 W
L
R
L
= 16 W
3
1
32 W
10
f = 10 kHz
100 Hz
1 kHz
2
0
0.2
0.2
1.5
2.0
2.5
3.0
3.5
1
10
100
Supply voltage
V
(V)
Output power
P
(mW)
CC
o
11
2002-04-19
TA2145AF
PW
V – Vol.
o
PW
V
– Vol.
no
10
500
300
Volume
Ratio
Resistance (Pin@-GND)
Volume
Ratio
Resistance (Pin@-GND)
=
=
Volume resistance
Volume resistance
-10
0dB = -10dBV
-30
-50
100
50
30
-70
-90
10
0
0
0.2
0.4
0.6
0.8
1
0.2
0.4
0.6
0.8
1
Volume ratio
Volume ratio
RR – Vol.
GVN
DV
, DK – V
REF CC
7.5
5.0
40
50
Resistance (Pin@-GND)
Volume ratioꢀꢀ=
Volume resistance
0dB = -10dBV, V = -20dBV
r
2.5
DV
REF
60
70
80
0.0
DK
-2.5
-5.0
-7.5
0
0.2
0.4
0.6
0.8
1
1.5
2.0
2.5
Supply voltage
3.0
3.5
4.0
Volume ratio
V
(V)
CC
GVN
DV
, DK – I
REF
I
, I
– Ta
m
CCQ CC
10
5
16
12
8
I
(PRE + PW, Vol. = min)
(PW only, Vol. = min)
CCQ1
DV
REF
0
DK
I
CCQ2
-5
-10
4
I
(GVN: I = 0)
m
CC
0
0
50
100
150
200
(mA)
250
300
-20
0
20
40
60
80
Motor current
I
m
Ambient temperature Ta (°C)
12
2002-04-19
TA2145AF
V
– Ta
PRE
G , V – Ta
V om
O (DC)
1.5
40
38
800
760
720
G
: V = -10dBV
o
V
V
om
: THD = 1%
V
REF
, PW OUT, PRE OUT
1
V
om
36
34
G
V
680
640
0.5
32
30
0
600
80
-20
0
20
40
60
80
80
80
-20
0
20
40
60
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
PRE
THD – Ta
PW
G , P – Ta
V o
1
35
30
25
50
40
30
20
V
o
= -10dBV
G
: V = -10dBV
o
V
P : THD = 10%
o
0.1
G
V
P
o
0.01
0.001
10
80
-20
0
20
40
60
-20
0
20
40
60
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
PW
THD – Ta
GVN
DV
, DK – Ta
REF
10
5
6
4
P
o
= 1 mW
2
2
1
DK
DV
0
REF
0.5
-2
-4
-6
0.2
0.1
-20
0
20
40
60
-20
0
20
40
60
80
Ambient temperature Ta (°C)
Ambient temperature Ta (°C)
13
2002-04-19
TA2145AF
Application Circuit
V
CC
22 mF 470 W
M
8200 pF 1 mF
18 kW
470 kW
PRE
OFF
180 W
1 mF
3.6 kW
470 kW
5 kW
24
23
22
21
20
19
RF
IN
18
17
16
15
14
13
PRE
OUT
PW
PRE
SW
GVN
GVN
CTL
GVN
OUT
V
IN
B
NF
PW
V
R
t
REF
B
IN
B
V
B
CC
CC
TA2145AF
PRE
GND
1
PRE
OUT
4
PW
IN
A
5
PW
PW
GND
11
GVN
GND
12
IN
2
NF
V
IN
C
A
A
CTL
6
OUT
B
OUT
8
OUT
A
C
A
3
7
9
10
470 kW
1 mF
8200 pF
OUT
OUT
OUT
A
C
B
470 kW 18 kW
12 kW
0.1 mF
R
R
L
22 mF
470 W
V
REF
L
BST: OFF
BST SW
14
2002-04-19
TA2145AF
Package Dimensions
Weight: 0.32 g (typ.)
15
2002-04-19
TA2145AF
RESTRICTIONS ON PRODUCT USE
000707EBA
· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..
· The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
· The information contained herein is subject to change without notice.
16
2002-04-19
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