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PDF TA8272HQ Data sheet ( Hoja de datos )
| Número de pieza | TA8272HQ | |
| Descripción | Max Power 43W BTL x 4ch Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8272HQ
Max Power 43 W BTL × 4 ch Audio Power IC
The TA8272HQ is 4 ch BTL audio power amplifier for car audio
application.
This IC can generate more high power: POUTMAX = 43 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 is built-in.
Weight: 7.7 g (typ.)
Features
• High power : POUTMAX (1) = 43 W (typ.)
(VCC = 14.4 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUTMAX (2) = 40 W (typ.)
(VCC = 13.7 V, f = 1 kHz, JEITA max, RL = 4 Ω)
: POUT (1) = 28 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 24 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
• 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 Ω)
• Low noise: VNO = 0.10 mVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, GV = 26dB, 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) = 9~18 V
Note 1: Install the product correctly. Otherwise, it may result in break down, damage and/or degradation to the
product or equipment.
Note 2: These protection functions are intended to avoid some output short circuits or other abnormal conditions
temporarily. These protect functions do not warrant to prevent the IC from being damaged.
- In case of the product would be operated with exceeded guaranteed operating ranges, these
protection features may not operate and some output short circuits may result in the IC being
damaged.
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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 µ-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
µ-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 µ-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.
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GV – f
40
35
30
25
20
15
10
VCC = 13.2 V
5 RL = 4 Ω
VOUT = 0.775 Vrms (0dBm)
0
0
100 1 k
10 k 100 k
Frequency f (Hz)
120
100
80
①
60
PD MAX – Ta
① INFINITE HEAT SINK
Rθ HS = 1°C/W
② HEAT SINK (RθHS = 3.5°C/W)
Rθ HS + RθHC = 4.5°C/W
③ NO HEAT SINK
RθJA = 39°C/W
40
20 ②
③
0
0 25 50 75 100 125
Ambient temperature Ta (°C)
150
PD – POUT
70
60
50 16 V
40
13.2 V
30
20
9V
10
f = 1 kHz
RL = 4 Ω
0
0 5 10 15 20 25
Output power POUT/ch (C)
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11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TA8272HQ.PDF ] | |
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