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TA2120FNG
TOSHIBA Bipolar Linear Integrated Circuit SIlicon Monolithic
TA2120FNG
Low Consumption Current Stereo Headphone Power Amplifier for Portable CD (3V Use)
The TA2120FNG is a low consumption current stereo headphone power amplifier developed for portable CD players (3V). This IC has active bass boost, output limiter, input pin for beep sound.
Features
* * * * * * * * * * * * * Low consumption current: ICCQ = 1.9 mA (C-CUP) (typ.) ICCQ = 2.6 mA (OCL) (typ.) Two kinds of gain mode available: GV = 16dB or 8.5dB Output power (VCC = 2.0 V, f = 1 kHz, THD = 10%, RL = 16 ) Po = 8 mW (typ.) Low noise: Vno = -98dBV (typ.) Built-in the center amplifier ON/OFF function. (Favorable for low dissipation current in the C-Couple output configuration) Built-in active bass boost system Built-in output limiter function Input pin for beep sound Excellent ripple rejection ratio Built-in capacitor for reducing buzz noise Built-in power mute Built-in a power on/off switch Operating supply voltage range (Ta = 25C): VCC = 1.8~4.5 V Weight: 0.14 g (typ.)
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TA2120FNG
Block Diagram
BIAS VCC VCC BEEP ON OFF ATT SW
OFF ON
BST SW
PW MT SW SW ON ON OFF OFF PW SW 20 MT SW 19 MT TC 18 17 16 GND BEEP IN BEEP Beep OUTB OUTA INB 15 INA 14
24 23 22 21 BIAS BST BST BIAS OUT SW IN BIAS
ATT SW
13
PW SW
MT SW
ALC
ALC
ATT SW
ADD B
BST
ADDA
PWC SW BST NF 1 ADD OUT 2 RF IN 3 OCL C-CUP BIAS BIAS VCC VCC PWC SW 4
PW B
PW C
PW A
ALC DET VCC PWR OUTB OUTC OUTA GND 5 6 7 8 9 RL RL MIX ALC ALC IN DET OUT 10 11 12 ALC SW ON OFF
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Terminal Explanation (Terminal voltage: Typical terminal voltage at no signal with test
circuit, VCC = 2.4 V, Ta = 25C)
Terminal No. Name Terminal Voltage (V)
Function
Internal Circuit
BIAS 10 k 1 BST NF NF of BST amplifier BST
BIAS 0.85
ADD OUT 30 k 24 BST OUT Output of BST amplifier (Terminal for filter)
24 12 k
1 2 k
0.85
ADDA PWA 14 BST AMP 24 k BIAS
2
ADD OUT
Output of ADD amplifier (Terminal for filter)
0.85 2
15
ADDB
3
RF IN
Terminal for ripple filter circuit 13 k 5
24 k
PWB
1.44
21
BIAS
BIAS voltage 22
30 k
3
0.85 21
22
BIAS IN
Filter terminal for BIAS circuit
43 k
0.85
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TA2120FNG
Terminal No. Name Function Internal Circuit Terminal Voltage (V)
VCC Center amplifier on/off switchover 4 PWC SW VCC: Center amplifier off (C-CUP) C-CUP OCL 4 5
OPEN: Center amplifier on (OCL)
7
OUTC
Output of center amplifier (Common terminal for OCL output configuration)
7
0.85
5
VCC
2.4
6
OUTB Output of power amplifier
VCC
PWA ALC 14 10 k 1.6 k 8
0.85
8
OUTA
14
INA 27 k Input of power amplifier BST OUT ATT SW
10 7.5 k 16 k 1.6 k
0.85
15
INB
10
MIX OUT
Output of power amplifier (Mixed)
6 0.85
9
PWR GND
GND of power amplifier
0
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TA2120FNG
Terminal No. Name Function Internal Circuit Terminal Voltage (V)
BIAS 20 k
11
ALC IN
Input terminal for ALC detector circuit
11
0.85 x4 x7
12
ALC DET
Smoothing for ALC detection, ALC on/off switchover GND: ALC off OPEN: ALC on
20 k BIAS
12
Power amplifier gain switchover 13 ATT SW OPEN/VCC: ATT off (GV = 16dB) GND: ATT on (GV = 8.5dB)
5 20 k 13
16
GND
GND of input stage in power amplifier
0
17
BEEP IN
Input terminal for Beep sound It receive beep sound from microcomputer. And power amplifier outputs this beep sound.
10 k 17
OUTA OUTB 0
18
MT TC
Terminal of mute smoothing Smoothing for shock noise at power muting switch over
10 k
18
1.4
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TA2120FNG
Terminal No. Name Function Internal Circuit Terminal Voltage (V)
VCC 5 Power mute switchover 19 MT SW GND/OPEN: Mute off VCC: Mute on 47 k 19 10 k
VCC 5 Power on/off switchover 20 PW SW VCC: Power on GND/OPEN: Power off 47 k 20
5 Bst on/off switchover 23 BST SW BST on: OPEN/VCC BST off: GND 20 k 23
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TA2120FNG
Application Note
1. Beep Sound
Beep sound signals from, for example, a micro controller can be received through the beep input pin 17. At power mute mode, PWA and PWB are turned off. The current of the beep signal input to been via beep amplifier is amplified at the output stage of PWA and PWB. The output from beep amplifier becomes the constant voltage source. As a result, the beep sound is output to the headphone load. If the input signal for beep (Pin 17) is not, this terminal should be fixed GND level.
VCC
PW SW (20pin)
OFF
ON
OFF
MT SW (19pin)
OFF
ON
OFF
BEEP IN (17pin) 200 ms 100 ms 100 ms
2. Power Switch
As long as the power switch is not connect to VCC, the IC does not operate. If external noise causes malfunctions, we recommend to connect a pull-down resistor externally (Sensitivity of the power mute switch is high).
3. Center Amplifier (PWC)
Terminal for PWC output is common terminal for OCL output configuration. PWC ON/OFF mode is controlled by PWC switch (Pin 4). To reduce the consumption current, PWC should be turned off by this switch. PWC SW OPEN: OCL VCC: C-Couple
4. Terminal of RF IN (3pin)
Adding Capacitor (Recommendation: 10 F) to terminal of RF IN (Pin 3), the ripple rejection ratio is improved by secondly ripple filter (In the C-Couple output configuration , this capacitor should be connected.)
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TA2120FNG
5. Threshold Voltage of Each Switches
(1)
5
PW SW, BST SW, ATT SW
5 4.5 V 4.5 V
(2)
MT SW
(V)
V13, V20, V23
3
V19 Terminal voltage
(V)
4
4
H
3 H 2
Terminal voltage
2 1.6 V 1 0.6 V L 0 0 1 2 3 4 5
1 0.8 V 0.3 V 0 0 1 2 L 3 4 5
Supply voltage
VCC (V)
Supply voltage
VCC (V)
PW SW (V20) "H" "L" Open Operating IC OFF "H" "L" Open
MT SW (V19) Mute ON Mute OFF
ATT SW (V13) "H" Open "L" ATT ON ATT OFF
BST SW (V23) BST ON BST OFF
6. Exterminal capaciter
These capacitors which are prevent oscillation of power amplifier and de-coupled at terminals of BIAS and VCC need to be small temperature coefficient and excellent frequency characteristic.
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TA2120FNG
Absolute Maximum Ratings (Ta = 25C)
Characteristics Supply voltage Output Current Power dissipation Operating temperature Storage temperature Symbol VCC Io (peak) PD (Note) Topr Tstg Rating 4.5 100 550 -25~75 -55~150 Unit V mA mW C C
Note: Derated above 25C in the proportion of 4.4 mW/C.
Electrical Characteristics
(Unless otherwise specified: VCC = 2.4 V, Rg = 600 , RL = 16 , f = 1 kHz, Ta = 25C, SW1: a, SW2: a, SW3: OPEN, SW4: a, SW5: a, SW6: OPEN, SW7: ON, SW8: ON)
Characteristics Symbol ICC1 ICC2 ICC3 ICC4 ICC5 ICC6 Consumption supply current ICC7 ICC8 Voltage gain (1) Voltage gain (2) Power amplifier stage Output power Total harmonic distortion Output noise voltage Crosstalk Ripple rejection ratio Mute attenuation Beep voltage Boost gain Output limiter level GV1 GV2 Pomax THD Vno CT RR MUTE VBEEP Bst VALC Test Circuit Test Condition IC OFF (C-Couple) SW1: b, SW2: b, SW3: ON IC OFF (OCL) SW1: b, SW2: b MUTE ON (C-Couple) SW2: b, SW3: ON MUTE ON (OCL) SW2: b No signal (C-Couple) SW3: ON No signal (OCL) Po = 0.5 mW + 0.5 mW (C-CUP), SW3: ON Po = 0.5 mW + 0.5 mW (OCL) Vo = -22dBV, SW6: GND Vo = -22dBV THD = 10%, VCC = 2.0 V Vo = -12.2dBV Rg = 600 , Filter: IHF- A, SW5: b Vo = -12.2dBV VCC = 1.8V, fr = 100 Hz, Vr = -20dBV Vo = -12.2dBv, SW2: b V Beep IN = 0dBV, SW2: b Vo = -30dBV, f = 100 Hz, SW7: ON OPEN Vin = -20dBV, SW8: OPEN Min 5.5 14 5 24 69 80 -56 9 -41.5 Typ. 0.1 0.1 1 1.7 1.9 2.6 6.6 12.1 8.5 16 8 0.1 -98 40 75 90 -51 11.5 -39.5 Max 5 A 5 2 3 mA 3.5 4.5 10.5 18 0.5 -92 -46 14 -37.5 dB dB mW % dBV dB dB dB dBV dB dBV Unit
Quiescent supply current
mA
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TA2120FNG
Test Circuit
Rg = 600 1 F Rg = 600 1 F 600 600 10 k SW6 13 ATT SW ALC DET 12 2.2 F SW8 15 INB 14 INA ALC IN 11 0.1 F 4.7 k 0.1 F * 10
BIAS 0.22 F 10 F 22 F
VCC (a)
VCC 1 F 10 k
IS1588
SW7
(b)
(b) (a) SW1 SW2 19 MT SW
24 BST OUT
23 BST SW
22 BIAS IN
21 BIAS
20 PW SW
18 MT TC
17 BEEP IN
16 GND
TA2120FNG
BST NF 1 2.2 F
ADD OUT 2 0.1 F 10 F
RF IN 3
PW-C SW 4
VCC 5 22 F
OUTB 6 16
OUTC 7 1 F*
OUTA 8 16
PWR GND 9
10 k
(a) (a) SW5b (b) (b) SW5a
MIX OUT
4.7 k 0.1 F *
SW3
(a) (a) (b) (b)
VCC
16
220 F
*: Monolithic ceramic capacitor
10
16
220 F
BIAS
BIAS
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TA2120FNG
Application Circuit 1 (C-Couple mode)
DAC OUT ON 1 F VCC 10 F 10 F ON VCC 1 F BEEP Vol: 10 k 100 k ON PW MT SW SW OFF OFF 20 PW SW 19 MT SW 1 F OFF ATT SW 0.1 F 17 BEEP IN 16 GND 15 INB 14 INA 13 ATT SW OUTA 8 0.1 F * 220 F PWR GND 9 MIX OUT 10 ALC IN 11 7 0.1 F * 12 22 F ALC SW ON OFF 4.7 RL PWR AMP GAIN ATT ON: GV = 8.5dB ATT OFF: GV = 16dB 100 k
BIAS 0.22 F
0.1 F ON
BST SW OFF
24 BST OUT
23 BST SW
22 BIAS IN
21 BIAS
18 MT TC
TA2120FNG
BST NF 1 2.2 F
ADD OUT 2 0.1 F 10 F
RF IN 3
PW-C SW 4 C-CUP
VCC 5
OUTB 6 220 F
OUTC
ALC DET
1 F
BIAS
BIAS
VCC
VCC
RL
11
4.7
*: Monolithic ceramic capacitor
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TA2120FNG
Application Circuit 2 (OCL mode)
DAC OUT ON 1 F VCC 10 F 10 F ON VCC 1 F BEEP Vol: 10 k 100 k ON PW MT SW SW OFF OFF 20 PW SW 19 MT SW 1 F OFF ATT SW 0.1 F 17 BEEP IN 16 GND 15 INB 14 INA 13 ATT SW OUTA 8 0.1 F * RL PWR GND 9 MIX OUT 10 ALC IN 11 7 RL 1 F * 12 22 F 0.1 F ALC SW ON OFF 4.7 PWR AMP GAIN ATT ON: GV = 8.5dB ATT OFF: GV = 16dB 100 k
BIAS 0.22 F
0.1 F ON
BST SW OFF
24 BST OUT
23 BST SW
22 BIAS IN
21 BIAS
18 MT TC
TA2120FNG
BST NF 1 2.2 F
ADD OUT 2 0.1 F
RF IN 3
PW-C SW 4 OCL
VCC 5
OUTB 6 0.1 F *
OUTC
ALC DET
1 F
BIAS
BIAS
VCC
4.7
*: Monolithic ceramic capacitor
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TA2120FNG
Characteristics (Unless otherwise specified: VCC = 2.4 V, RL = 16 , Rg = 600 , f = 1 kHz,
Ta = 25C, OCL, ATT OFF)
ICC - VCC
5
C-CUP
100
ICC - Po
(mA)
VCC = 2.4 V 50 f = 1 kHz RL = 16 30 A/Bch IN
C-CUP
(mA)
ICC
3 ICC (BST ON)
Consumption supply current
Quiescent supply current
ICC
ICC3 ICC5 (MUTE ON)
4
10 5 3
2
1
1 0.5 0.03 0.1 0.3 1 3 10
0 1.5 2.5 3.5 4.5
Output power Po (mW) Supply voltage VCC (V)
ICC - VCC
5
OCL
100
IC - P o
(mA)
VCC = 2.4 V 50 f = 1 kHz RL = 16 30 A/Bch IN
OCL
(mA)
ICC
3 ICC6 2 ICC4 (MUST ON) 1
Consumption supply current
ICC (BST ON)
Quiescent supply current
ICC
4
10 5 3
1 0.5 0.03 0.1 0.3 1 3 10
0 1.5 2.5 3.5 4.5
Output power Po (mW) Supply voltage VCC (V)
VDC - VCC (BIAS, OUTA/B/C) OCL
2.5 100
Po - VCC
OCL
VDC (V)
50
(mW) Po Output power
2.0
30
1.5
Output DC voltage
10
1.0
5 3 THD = 10% A/Bch IN 1
0.5
0 1.5 2.5 3.5 4.5
1.5
2.5
3.5
4.5
Supply voltage
VCC
(V)
Supply voltage
VCC
(V)
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TA2120FNG
THD - Po
20 VCC = 2.4 V A/Bch IN 5 3
OCL
10 Vo = -20dBV 0
CT - f
OCL
THD
(%)
10 RL = 16
Total harmonic distortion
CT (dB) Cross talk
10 30 100 10 kHz 1 kHz 100 Hz 0.3 1 3
-10 -20 -30 -40 -50 -60 10
1 0.5 0.3
0.1 0.05 0.1
30
100
300
1k
3k
10k
30k
100k
Output power Po (mW)
Frequency
f (Hz)
Vo - f
-10 ATT OFF
OCL
VCC = 2.4 V Vin = -46dBV 0 -10
Vo, THD - Vin
14 ALC OFF
12
(dBV)
(dBV)
-20 BST ON
-20 -30 -40 -50 -60
ALC OFF
10 8
VO
VO
Output voltage
Output voltage
VO Vo
ALC ON 6 4
-30 BST OFF
THD
ALC ON
2 0 0
-40 30 100 300 1k 3k 10k 30k 100k
-70 -80
-70
-60
-50
-40
-30
-20
-10
Frequency
f (Hz)
Vin (dBV)
RR - VCC
-30
OCL
Vr = -20dBV fr = 100 Hz ATT OFF -40
BEEP
OCL
(dB)
-40
-50
PR
-50
(dBV)
-60
Ripple rejection ratio
-60
Beep output voltage
-70
-70
BST OFF
-80
-80
-90
fBEEP = 400 Hz Rectangle wave -14 -12 -10 -8 -6 -4 -2 0
-90 1.5 2.5 3.5 4.5
-100 -16
Supply voltage
VCC
(V)
Beep input voltage
BEEP VIN
(dBV)
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THD
(%)
TA2120FNG
ICC - Ta
5 2.5
VDC - Ta
VDC (V) Output DC voltage
2.0
ICC6
ICC (mA)
3
1.5
ICC4
1.0
1
0.5
0 -50
0
50
100
0 -50
0
50
100
Ambient temperature
Ta
(C)
Ambient temperature
Ta
(C)
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TA2120FNG
Package Dimensions
Weight: 0.14 g (typ.)
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TA2120FNG
RESTRICTIONS ON PRODUCT USE
* The information contained herein is subject to change without notice. 021023_D
060116EBA
* 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. 021023_A * 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. 021023_B * The products described in this document shall not be used or embedded to any downstream products of which manufacture, use and/or sale are prohibited under any applicable laws and regulations. 060106_Q * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others. 021023_C * The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_E
About solderability, following conditions were confirmed * Solderability (1) Use of Sn-37Pb solder Bath * solder bath temperature = 230C * dipping time = 5 seconds * the number of times = once * use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder Bath * solder bath temperature = 245C * dipping time = 5 seconds * the number of times = once * use of R-type flux
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