TA8272H Datasheet, PDF (5/13 Pages) Toshiba Semiconductor – Max Power 43 W BTL x 4 ch Audio Power IC

TA8272H
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 V_CC/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.
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2002-06-20