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PDF TA8273H Data sheet ( Hoja de datos )

Número de pieza TA8273H
Descripción Bipolar Linear Integrated Circuit Silicon Monolithic
Fabricantes Toshiba 
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8273H
Max Power 47 W BTL × 4 ch Audio Power IC
The TA8273H is 4 ch BTL audio power amplifier for car audio
application.
This IC can generate more high power: POUTMAX = 47 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, muting function, and
diagnosis circuit which can detect output to VCC/GND short,
output offset voltage and over voltage input mode.
Additionally, the AUX amplifier and various kind of protector
for car audio use are built-in.
Features
Weight: 7.7 g (typ.)
· High power : POUTMAX (1) = 47 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 )
: POUTMAX (2) = 43 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 )
: POUT (1) = 29 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 )
: POUT (2) = 25 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 )
· Built-in diagnosis circuit (pin 25)
· Low distortion ratio: THD = 0.02% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 5 W, RL = 4 )
· Low noise: VNO = 0.10 mVrms (typ.)
(VCC = 13.2 V, Rg = 0 , GV = 27dB, 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 4 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) = 9~16 V
TA8273H
1 2002-02-13

1 page




TA8273H pdf
TA8273H
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. Diagnosis Output (pin 25)
This diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 7.
In case diagnosis circuit that detect unusual case is operated, NPN transistor (Q1) or (Q2) is turned on.
It is possible to protect all the system of apparatus as well as power IC protection.
In case of being unused this function, use this IC as open-connection on pin 25.
5V
OUTPUT OFFSET
VOLTAGE
DETECTOR
OUTPUT SHORT
PROTECTOR
OVER VOLTAGE
PROTECTOR
25
Q2
Q1
5V
GND
pin 25: Open collector output (active low)
t
Q1 is turned on
Q2 is turned on
Figure 7 Self Diagnosis Output
5.1 In Case of Shorting Output to VCC/GND or Over Voltage Power Supplied
NPN transistor (Q1) is turned on.
Threshold of over voltage protection: VCC = 22 V (typ.)
5V
25 m-COM
LED/LCD (Flashing)
ALARM (Announcement from a speaker.)
REGULATOR OFF (Relay OFF)
MEMORY (Count and record)
Figure 8 Application 1
5.2 In Case of Shorting Output to Output
NPN transistor (Q1) is turned on and off in response to the input signal voltage.
5
2002-02-13

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TA8273H arduino
GV – f
40
35
30
25
20
15
10
5
0
10
VCC = 13.2 V
RL = 4 W
VOUT = 0.775 Vrms (0dBm)
100 1 k
10 k 100 k
Frequency f (Hz)
120
100
80
60
PD MAX – Ta
INFINITE HEAT SINK
RqJC = 1°C/W
HEAT SINK (RqHS = 3.5°C/W)
RqJC + RqHS = 4.5°C/W
NO HEAT SINK
RqJA = 39°C/W
40
20
0
0 25 50 75 100 125
Ambient temperature Ta (°C)
150
TA8273H
PD – POUT
70
60
50 16 V
40
13.2 V
30
20
9V
10
f = 1 kHz
RL = 4 W
0
0
5
10 15 20
25
Output power POUT/ch (C)
11 2002-02-13

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