TA8270HQ TOSHIBA Semiconductor CORPORATION, TA8270HQ Datasheet - Page 5

• Manufacturer Part Number: TA8270HQ
• Description: Max Power 43 W Btl ? 4 Ch High Efficiency Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

4. Center Amp Pin: Center (pin 16)
5.
voltage detector
Output offset
Over voltage
Output short
Output clip
protector
protector
5.1
5.2
detector
reference voltage for output in the IC, is connected to
this pin.
component, reducing the distortion ratio of the audio
output.
Diagnosis Output
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.
Output from the center amp, which determines the
Connecting a capacitor to the pin rejects the ripple
This diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 7.
In case of being unused this function, use this IC as open-connection on pin 25.
In Case of Shorting Output to V
In Case of Shorting Output to Output
NPN transistor. (Q1) is turned on.
Threshold of over voltage protection: V
NPN transistor. (Q1) is turned on and off in response to the input signal voltage.
Q2
Q1
25
25
(pin 25)
Base voltage of Q1
Base voltage of Q2
pin 25 voltage
Figure 7 Self Diagnosis Output
5 V
5 V
MEMORY (Count and record)
µ-COM
pin 25: Open collector output (active low)
Figure 8 Application 1
GND
5 V
CC
V
/GND or Over Voltage Power Supplied
CC
5
= 22 V (typ.)
Offset
Det.
LED/LCD
REGULATOR → OFF
ALARM
PW-GND
(Flashing)
(Announcement from a speaker.)
Clip Det.
CENTER
Figure 6 CENTER
(Relay → OFF)
16
Center amp
TA8270HQ
Short Det.
2006-04-28
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