Over Voltage Protector - Toshiba TA8266HQ Description And Application Manual

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.
Diagnosis Output
5.
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) 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.
OUTPUT SHORT
OVER VOLTAGE
5.1 In Case of Shorting Output to V
NPN transistor (Q1) is turned on.
Threshold of over voltage protection: V
25
5.2 In Case of Shorting Output to Output
NPN transistor (Q1) is turned on and off in response to the input signal voltage.
(pin 25)
25
Q1
PROTECTOR
PROTECTOR
pin 25: Open collector output (active low)
Figure 7 Self Diagnosis Output
/GND or Over Voltage Power Supplied
CC
= 22 V (typ.)
CC
5 V
µ-COM
MEMORY (Count and record)
Figure 8 Application 1
5
IN
AUX AMP
AUX-IN
µ-COM
16
Figure 6 AUX Input
5 V
5 V
GND
Q1 is turned on
LED/LCD (Flashing)
ALARM (Announcement from a speaker.)
REGULATOR → OFF (Relay → OFF)
TA8266HQ
20dB AMP.
OUT (+)
OUT (−)
−
20dB
t
2006-04-28