ta8260ah TOSHIBA Semiconductor CORPORATION, ta8260ah Datasheet - Page 8

• Manufacturer Part Number: ta8260ah
• Description: Max Power 40 W Btl 4ch Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

7. Junction temperature detecting pin 23
8. Cross talk
DC voltage: V
The cross talk characteristics of the IC is not good between OUT1 and 2, OUT3 and 4.
So we recommend to use by below method.
Using temperature characteristic of a band gap circuit and in proportion to junction temperature, pin 23
and V
In deciding a heat sink size, a junction temperature can be easily made clear by measuring voltage at this
pin while a backside temperature of IC was so far measured using a thermocouple type thermometer.
And, please refer to below table in case of applying the AUX. IN because it is out to OUT1 and 4.
ex)
OUT1, 2
OUT3, 4
23x
OUT1
OUT2
OUT3
OUT4
at Tj = x°C is decided by the following expression :
23
rises at about +5 mV/°C temperature characteristic. The relation between V
L-ch (or R-ch)
R-ch (or L-ch)
Front
Front
Rear
Rear
L-ch (or R-ch)
R-ch (or L-ch)
Figure 10
8
AUX. OUT
AUX. OUT
Š
Š
TA8260AH
23
2002-03-05
at Tj = 25°C