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PDF TA2145AF Data sheet ( Hoja de datos )
| Número de pieza | TA2145AF | |
| Descripción | 3V STEREO GEADPHONE AMPLIFIER (3V USE) | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2145AF
3 V Stereo Headphone Amplifier (3 V USE)
TA2145AF
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
Low noise: Vni = 1.2 µVrms (typ.)
Weight: 0.32 g (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
ATT = 82dB (Ta = 25°C, typ.)
· Built-in bass boost function
· Low supply current (VCC = 3 V, f = 1 kHz, PRE OUT = 100 mVrms, 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
1 page  
Terminal
No. Name
Function
19 RF IN
Ripple filter of power supply
Internal Circuit
TA2145AF
Terminal
Voltage
(v)
19 24 2.5
VCC
24 VREF
Reference voltage
Preamplifier and power amplifier
operate on this reference.
1.2
5 2002-04-19
5 Page 
PRE
20
10
5
Vni – VCC
2
1
0.5
0 1.5
2.0 2.5 3.0 3.5
Supply voltage VCC (V)
4.0
TA2145AF
PRE
10
fr = 100 Hz
20 Vr = -20dBV
30
RR – VCC
40
50
60
70
80
0 1.5
2.0 2.5 3.0 3.5
Supply voltage VCC (V)
4.0
PW
60
Vo = -10dBV
50
GV – f
40
BST = ON
BST = OFF
30
20
20 100 1 k 10 k
Frequency f (Hz)
100 k
PW CT – f
0
10
BST = ON
20
30 BST = OFF
40
Vo = -10dBV
50
60
20 100 1 k 10 k
Frequency f (Hz)
100 k
PW
100
THD = 10%
Po – VCC
RL = 16 W
32 W
10
2
0 1.5
2.0 2.5 3.0 3.5
Supply voltage VCC (V)
4.0
PW
30
VCC = 3 V
RL = 16 W
10
THD – Po
3
1
0.2
0.2
f = 10 kHz
100 Hz
1 kHz
1 10
Output power Po (mW)
100
11 2002-04-19
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet TA2145AF.PDF ] | |
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