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PDF TA8271H Data sheet ( Hoja de datos )
| Número de pieza | TA8271H | |
| Descripción | Max Power 41W BTL x 4-Ch Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8271H
Max Power 41 W BTL × 4 ch Audio Power IC
The TA8271H is 4 ch BTL audio power amplifier for car audio
application.
This IC can generate more high power: POUTMAX = 41 W as it
is included the pure complementary PNP and NPN transistor
output stage.
It is designed low distortion ratio for 4 ch BTL audio power
amplifier, built-in stand-by function and muting function.
Additionally, the AUX amplifier and various kind of protector
for car audio use is built-in.
Features
· High power: POUTMAX (1) = 41 W (typ.)
Weight: 7.7 g (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUTMAX (2) = 37 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT (1) = 24 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 21 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
· Low distortion ratio: THD = 0.02% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 Ω)
· Low noise: VNO = 0.18 mVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, GV = 34dB, BW = 20 Hz~20 kHz)
· Built-in stand-by switch function (pin 4)
· Built-in muting function (pin 22)
· Built-in AUX amplifier from single input to 2 channels output (pin 16)
· Built-in various protection circuit
: Thermal shut down, over voltage, out to GND, out to VCC, out to out short
· Operating supply voltage: VCC (opr) = 9~18 V
TA8271H
1 2002-02-13
1 page  
TA8271H
4. AUX Input (pin 16)
The pin 16 is for input terminal of AUX
amplifier.
The total gain is 0dB by using of AUX amplifier.
Therefore, the m-COM can directly drive the
AUX amplifier.
BEEP sound or voice synthesizer signal can be
input to pin 16 directly.
When AUX function is not used, this pin must be
connected to PRE-GND (pin 13) via a capacitor.
20dB AMP.
IN
AUX-IN
m-COM
16
AUX AMP
-20dB
OUT (+)
OUT (-)
Figure 6 AUX Input
5. Prevention of speaker burning accident (In Case of Rare Short Circuit of Speaker)
When the direct current resistance between OUT + and OUT - terminal becomes 1 W or less and output
current over 4 A flows, this IC makes a protection circuit operate and suppresses the current into a speaker.
This system makes the burning accident of the speaker prevent as below mechanism.
<The guess mechanism of a burning accident of the speaker>
Abnormal output offset voltage (voltage between OUT + and OUT -) over 4 V is made by the external
circuit failure.(Note 1)
¯
The speaker impedance becomes 1 W or less as it is in a rare short circuit condition.
¯
The current more than 4 A flows into the speaker and the speaker is burned.
Current into a speaker
Less than 4 W
Operating point of protector
About 1 W 4 W
Figure 9
Speaker impedance
Note 1: It is appeared by biased input DC voltage
(for example, large leakage of the input capacitor, short-circuit between copper patterns of PCB.)
5 2002-02-13
5 Page 
Package Dimensions
TA8271H
Weight: 7.7 g (typ.)
11 2002-02-13
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TA8271H.PDF ] | |
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