TOSHIBA TA2145AF

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: Vni = 1.2 µVrms (typ.)
Preamplifier on/off switch.
·
Built-in power amplifier
OCL (Output condenser-less)
Voltage gain: GV = 31 dB (typ.)
·
Built-in motor governor (Current proportion type)
·
Built-in DC volume control function
·
Built-in bass boost function
·
Low supply current (VCC = 3 V, f = 1 kHz, PRE OUT = 100 mVrms, Ta = 25°C, typ.)
ATT = 82dB (Ta = 25°C, typ.)
·
Quiescent supply current
PRE + PW: ICCQ = 8.5 mA
GVN: ICC = 2.5 mA
·
0.1 mW × 2 ch output
ICC1 = 9.8 mA (RL = 32 Ω)
ICC2 = 10.5 mA (RL = 16 Ω)
·
0.5 mW × 2 ch output
ICC3 = 14.0 mA (RL = 32 Ω)
ICC4 = 16.5 mA (RL = 16 Ω)
·
Operating supply voltage range (Ta = 25°C)
VCC (opr) = 1.8~3.6 V
GVN VCC (opr) = 2.1~3.6 V (Motor voltage = 1.8 V)
1
2002-04-19
TA2145AF
Block Diagram
M
PRE:
OFF
24
VREF
23
INB
22
NFB
21
PRE
OUTB
20
PW
INB
19
RF
IN
RIPPLE
FILTER
18
PRE
SW
17
VCC
16
GVN
VCC
15
Rt
14
GVN
CTL
GVN
OUT
13
PRE
SW
PREB
VOL.
VREF
VOL.
PW B
1
PRE
GND
2
INA
3
PW A
PW C
VOL.
CONTROL
PREA
NFA
4
PRE
OUTA
5
PW
INA
6
VCTL
7
OUTB
8
OUTA
9
10
OUTC PW
INC
11
PW
GND
12
GVN
GND
OUTA
RL
BST SW
VREF
BST: OFF
2
OUTC
RL
OUTB
2002-04-19
TA2145AF
Terminal Explanation (Terminal Voltage: Typical terminal voltage at no signal with test
circuit, VCC = 3 V, Ta = 25°C)
Terminal
No.
Function
Internal Circuit
Terminal
Voltage
(v)
The GND, except for power drive
stage and motor governer stage.
¾
0
Name
1
PRE GND
2
INA
RF
Input of preamplifier
23
INB
3
NFA
3
2
NF of preamplifier
22
NFB
4
PRE OUTA
21
PRE OUTB
7
OUTB
8
OUTA
9
OUTC
5
PW INA
500 W
1.2
500 W
1.2
VREF
Output of preamplifier
VCC
4
1.2
Output of power amplifier
5
10 kW
RF
Input of power amplifier
20
VREF
1.2
PW INB
VCC
6
VCTL
VREF
The terminal of DC volume control
¾
6
3
2002-04-19
TA2145AF
Terminal
No.
Function
Terminal
Voltage
(v)
Internal Circuit
Name
20 kW
VREF
10
10
PW INC
Input of center amplifier
1.2
30 kW
2 kW
VREF
11
PW GND
GND for power drive stage
¾
0
12
GVN GND
GND for motor governor stage
¾
0
13
GVN OUT
Motor terminal
M
16
15
14
¾
13
14
GVN CTL
The terminal of motor speed control
¾
15
Rt
The terminal of amateur
compensation resistor
¾
16
GVN VCC
VCC for motor governor stage
3
17
VCC
VCC for preamplifier stage and
power amplifier stage.
¾
3
18
Muting switch of preamplifier
18
PRE SW
Preamp. on: “L” level/open
Preamp. off: “H” level
¾
Refer to application note
4
2002-04-19
TA2145AF
Terminal
No.
19
Function
Terminal
Voltage
(v)
Internal Circuit
Name
RF IN
Ripple filter of power supply
19
2.5
24
Reference voltage
24
VREF
Preamplifier and power amplifier
operate on this reference.
5
1.2
10 kW
1.3 kW 4.7 kW
4 kW
VCC
2002-04-19
TA2145AF
Application Note
·
VCC and GND
This IC has two VCC terminals and three GND terminals. Pattern layout should be designed carefully to
reduce the common impedance.
· VCC
VCC (pin 17) ----------------- Preamplifier stage and power amplifier stage.
GVN VCC (pin 16) --------- Motor governor stage.
· 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.
·
VREF
·
RF IN
·
Preamplifier
It is necessary to stabilize the VREF circuit, because the internal circuit operate on this reference.
As this terminal is an input terminal of the ripple filter, it cannot supply a power supply to other ICs etc.
Input signal should be applied to VREF standard, otherwise pop noise become bigger when VCC is turned on
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
V18
(V)
4
Terminal DC voltage
·
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
Supply voltage VCC
3.5
4.0
(V)
6
2002-04-19
TA2145AF
Maximum Ratings (Ta = 25°C)
Characteristic
Symbol
Rating
Unit
VCC
4
V
Supply voltage
Power dissipation
PD
(Note 1)
400
(Note 2)
925
mW
Output current (PW AMP.)
IO (PW)
200
mA
Output current (GVN)
IO (GVN)
700
mA
Operating temperature
Topr
-25~75
°C
Storage temperature
Tstg
-55~150
°C
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, VCC = 3 V, Ta = 25°C, f = 1 kHz, SW2: a, SW5: OPEN
W, RL = 10 kW
W, SW1: ON, SW3: b, SW4: b
Preamplifier:
Rg = 2.2 kW
Power amplifier: Rg = 600 W, RL = 16 W, Vol.: max, SW1: OPEN, SW3: a, SW4: a
Motor governor: Im = 100 mA, SW1: OPEN, SW3: b, SW4: b)
Symbol
Test
circuit
ICCQ1
¾
ICCQ2
Open loop voltage gain
Characteristic
Min
Typ.
Max
Pre off, Vin = 0, Vol.: min,
SW4: b, SW5: ON
¾
7.5
13
¾
Vin = 0, Vol.: min, SW4: b
¾
8.5
14.5
GVO
¾
Vo = -10dBV, SW2: b
¾
86
¾
dB
Closed loop voltage gain
GVC
¾
Vo = -10dBV
¾
35
¾
dB
Maximum output voltage
Vom
¾
THD = 1%
550
720
¾
mVrms
Total harmonic distortion
THD1
¾
Vo = -10dBV
¾
0.02
0.3
%
Equivalent input noise
voltage
Vni
¾
Rg = 2.2 kW, SW1: OPEN
BPF = 20 Hz~20 kHz,
NAB (GV = 35dB, f = 1 kHz)
¾
1.2
2.4
mVrms
Cross talk
CT1
¾
Vo = -10dBV
¾
70
¾
dB
Ripple rejection ratio
RR1
¾
fr = 100 Hz, Vr = -20dBV
¾
48
¾
dB
Preamplifier muting
attenuation
ATT1
¾
Vo = -10dBV, SW5: OPEN ® ON
¾
80
¾
dB
Preamplifier on voltage
V18 (ON)
¾
0
¾
0.5
V
Preamplifier off voltage
V18 (OFF)
¾
1.5
¾
1.8
V
Voltage gain
GV
¾
Vo = -10dBV
29
31
33
dB
Channel balance
CB
¾
Vo = -10dBV
-1.5
0
+1.5
dB
Output power 1
Po1
¾
RL = 16 W, THD = 10%
17
28
¾
mW
Output power 2
Po2
¾
RL = 32 W, THD = 10%
¾
20
¾
mW
THD2
¾
Po = 1m W
¾
0.5
¾
%
Output noise voltage
Vno
¾
Rg = 600 W, SW3: b
BPF = 20 Hz~20 kHz
¾
270
400
mVrms
Ripple rejection ratio
RR2
¾
fr = 100 Hz, Vr = -20dBV
¾
52
¾
dB
Cross talk
CT2
¾
Vo = -10dBV
¾
32
¾
dB
Dc volume maximum
attenuation
ATT2
¾
Vo = -10dBV, SW4: a®b
(Vol.: max ® min)
¾
82
¾
dB
ICC
¾
Im = 0
¾
2.5
3.5
mA
Saturation voltage
VCE (sat)
¾
Im = 200 mA
¾
¾
0.5
V
Reference voltage
,VREF
¾
Im = 100 mA
0.76
0.81
0.86
V
Reference voltage
fluctuation 1
,VREF1
¾
VCC = 2.1~3.6 V
¾
0.25
¾
%/V
Reference voltage
fluctuation 2
,VREF2
¾
Im = 25~250 mA
¾
0.003
¾
%/mA
Reference voltage
fluctuation 3
,VREF3
¾
Ta = -25~75°C
¾
0.005
¾
%/°C
K
¾
34.5
37.5
40.5
Current ratio fluctuation 1
,K1
¾
VCC = 2.1~3.6 V
¾
0.25
¾
%/V
Current ratio fluctuation 2
,K2
¾
Im = 25~250 mA
¾
0.08
¾
%/mA
Current ratio fluctuation 3
,K3
¾
Ta = -25~75°C
¾
0.005
¾
%/°C
Power amp.
Pre amp.
Quiescent supply current
Total harmonic distortion
Motor governor
Supply current
Current ratio
Test condition
VCC = 1.8 V
¾
8
Unit
mA
2002-04-19
TA2145AF
Test Circuit
Rg = 600 W
(a)
SW3b
(b)
600 W
1 mF
24
23
VREF
INB
SW5
100 mF
470 W
470 kW
470 kW
22
21
NFB
PRE
OUTB
5W
180 W
1 mF
3.6 kW 5 kW
20
19
18
17
16
15
14
13
PW
INB
RF IN
PRE
SW
PW
VCC
GVN
VCC
Rt
GVN
CTL
GVN
OUT
PW
INC
10
PW
GND
11
GVN
GND
12
TA2145AF
PRE
GND
1
INA
2
NFA
3
PRE
OUTA
4
PW
INA
5
VCTL
6
OUTB OUTA OUTC
7
8
9
470 kW
470 kW
PW OUTA
22 mF 470 W
SW4
(a) (b)
8200 pF
220 mF (b) (a) 18 kW
SW2a
PRE OUTA
RL
PW OUTC
VREF
1 mF
RL
1 mF
2.2 kW
2.2 kW
47 mF
10 kW
PRE SW1a
INA
VREF
SW2b
220 mF (b) (a) 18 kW
22 mF
8200 pF
1000 pF 1000 pF
22 mF
Rg = 600 W Rg = 600 W
PRE INB
SW1b
VCC
47 mF
VREF
PRE OUTB
10 kW
1 mF
PW INB
PW OUTB
10 kW
(a) Rg = 600 W
SW3a
600 W
PW IN
A
(b)
VREF
9
2002-04-19
TA2145AF
Characteristic Curves (Unless otherwise specified, VCC = 3 V, Ta = 25°C, f = 1 kHz,
W
Preamplifier:
Rg = 2.2 kW
W, RL = 10 kW
Power amplifier: Rg = 600 W, RL = 16 W, Vol. = max
Motor governor: Im = 100 mA)
ICCQ, ICC – VCC
VO (DC) – VCC
(V)
2.5
ICCQ1 (PRE + PW, Vol.: min)
8
ICCQ2 (PW only, Vol.: min)
4
ICC (GVN: Im = 0)
0
0
1.5
2.0
2.5
3.0
Supply voltage VCC
3.5
VREF, PW OUT, PRE OUT
1.0
0.5
0
0
4.0
1.5
2.0
2.5
3.0
Supply voltage VCC
3.5
4.0
(V)
CT – f
PRE
40
Vo = -10dBV
Vo = -10dBV
80
CT (dB)
GVO
Cross talk
60
40
0
10
100
1k
Frequency f
PRE
10 k
80
10
100 k
1k
Frequency f
10 k
100 k
1000
10000
(Hz)
THD – Vo
PRE
Vom – VCC
THD = 1%
500
200
100
0
100
(Hz)
(%)
(mVrms)
1000
60
70
GVC
20
50
1.5
2.0
2.5
3.0
Supply voltage VCC
3.5
10
THD
(dB)
(dB)
1.5
GVO, GVC – f
PRE
Open loop voltage
GVO
Closed loop voltage GVC
2.0
(V)
100
Maximum output voltage Vom
Output DC voltage VO (DC)
12
3
Total harmonic distortion
Quiescent supply current ICCQ (mA)
(mA)
Supply current
ICC
16
1
f = 10 kHz
3
(V)
f = 1 kHz
0.03
0.01
1
4.0
f = 100 Hz
0.1
10
100
Output voltage Vo
10
(mVrms)
2002-04-19
TA2145AF
Vni – VCC
PRE
PRE
RR – VCC
10
20
(dB)
10
Ripple rejection ratio RR
Equivalent input noise Vni
(mVrms)
fr = 100 Hz
5
2
1
0.5
0
1.5
2.0
2.5
3.0
Supply voltage VCC
PW
3.5
20
Vr = -20dBV
30
40
50
60
70
80
0
4.0
1.5
2.0
(V)
2.5
3.0
3.5
Supply voltage VCC
GV – f
PW
4.0
(V)
CT – f
60
Vo = -10dBV
Vo = -10dBV
0
Cross talk
40
BST = ON
Voltage
GV
(dB)
CT (dB)
50
BST = OFF
10
BST = ON
20
30
BST = OFF
40
30
50
20
20
100
1k
10 k
Frequency f
60
20
100 k
PW
100 k
(Hz)
THD – Po
30
THD
Po (mW)
Total harmonic distortion
RL = 16 W
32 W
10
1.5
VCC = 3 V
RL = 16 W
(%)
THD = 10%
Output power
10 k
Frequency f
100
2
0
1k
(Hz)
Po – VCC
PW
100
2.0
2.5
3.0
Supply voltage VCC
3.5
10
3
f = 10 kHz
1
100 Hz
1 kHz
0.2
0.2
4.0
(V)
1
Output power
11
10
100
Po (mW)
2002-04-19
TA2145AF
PW
500
Resistance (Pin@-GND)
=
Volume resistance
-10
Vno
0dB = -10dBV
-30
Output noise voltage
(mW)
Ratio
(mVrms)
Volume
Output voltage Vo
Vno – Vol.
PW
Vo – Vol.
10
-50
-70
-90
0
0.2
0.4
0.6
0.8
Volume
300 Ratio
Volume resistance
100
50
30
10
0
1
Resistance (Pin@-GND)
=
0.2
0.4
Volume ratio
RR – Vol.
(mV)
Reference voltage fluctuation DVREF
Current ratio fluctuation
DK
(dB)
Ripple rejection ratio RR
Volume resistance
50
0dB = -10dBV, Vr = -20dBV
60
70
80
0
0.2
0.4
0.6
0.8
1
2.5
DVREF
0.0
DK
-2.5
-5.0
-7.5
1.5
2.0
2.5
DVREF, DK – Im
3.0
(V)
ICCQ, ICC – Ta
(mA)
(mA)
16
5
Quiescent Supply current ICCQ
Supply current
ICC
(mV)
Reference voltage fluctuation DVREF
current ratio fluctuation
DK
4.0
5.0
Supply voltage VCC
10
DVREF
0
DK
-5
-10
0
3.5
7.5
Volume ratio
GVN
1
DVREF, DK – VCC
GVN
Resistance (Pin@-GND)
0.8
Volume ratio
40
Volume ratio =
0.6
50
100
150
Motor current
200
Im
250
12
ICCQ1 (PRE + PW, Vol. = min)
8
ICCQ2 (PW only, Vol. = min)
4
ICC (GVN: Im = 0)
0
-20
300
(mA)
0
20
40
60
80
Ambient temperature Ta (°C)
12
2002-04-19
TA2145AF
GV, Vom – Ta
PRE
800
GV: Vo = -10dBV
GV
1
0.5
0
0
20
40
60
Vom
36
GV
680
32
640
80
-20
Ambient temperature Ta (°C)
PRE
THD – Ta
60
600
80
GV, Po – Ta
PW
Vo = -10dBV
50
GV: Vo = -10dBV
GV
GV
30
30
0.01
Po
20
25
-20
0
20
40
60
80
-20
PW
(mV)
Po = 1 mW
Reference voltage fluctuation DVREF
Current ratio fluctuation
DK
THD
2
1
0.5
0.2
0
20
40
60
40
60
(mW)
10
80
DVREF, DK – Ta
GVN
THD – Ta
5
-20
20
Ambient temperature Ta (°C)
10
0.1
0
Output Power Po
(dB)
40
0.1
Voltage
THD
Total harmonic distortion
40
35
Ambient temperature Ta (°C)
(%)
20
Po: THD = 10%
0.001
Total harmonic distortion
0
Ambient temperature Ta (°C)
(%)
1
720
34
30
-20
760
(dB)
VREF, PW OUT, PRE OUT
Voltage gain
Output voltage VO (DC)
(V)
Vom: THD = 1%
38
(mVrms)
40
Maximum output voltage Vom
VO (DC) – Ta
1.5
80
Ambient temperature Ta (°C)
6
4
2
DK
0
DVREF
-2
-4
-6
-20
0
20
40
60
80
Ambient temperature Ta (°C)
13
2002-04-19
TA2145AF
Application Circuit
8200 pF 1 mF
M
PRE
OFF
100 mF
18 kW
47 mF
470 W
470 kW
22 mF
180 W
1 mF
3.6 kW
470 kW
24
23
22
VREF
INB
NFB
5 kW
21
PRE
OUTB
20
PW
INB
19
RF
IN
18
PRE
SW
PW
VCC
17
16
GVN
VCC
OUTA
8
OUTC
9
15
Rt
14
GVN
CTL
13
GVN
OUT
PW
GND
11
GVN
GND
12
TA2145AF
PW
INA
5
470 kW 18 kW
22 mF 470 W
VCTL
6
1 mF
8200 pF
OUTB
7
VREF
12 kW
PW
INC
10
0.1 mF
0.1 mF
2
PRE
OUTA
3
4
470 kW
NFA
0.1 mF 33 kW
INA
33 kW
PRE
GND
1
10 kW
1000 pF 1000 pF
PRE INA
PRE INB
22 mF
0.1 mF
VCC
OUTC
BST SW BST: OFF
14
OUTA
RL
RL
OUTB
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
This datasheet has been download from:
www.datasheetcatalog.com
Datasheets for electronics components.