TA8248K
4. Oscillation preventive measures
For oscillation preventive capacitor C6 and C7 between the output terminal and GND, it is recommended
to use polyester film capacitor having good characteristics for temperature and for high frequency.
Since the characteristics of the capacitor is liable to be influenced by the temperature, use this capacitor
after the temperature test to check the oscillation allowance.
In addition, as the position of the electrolytic capacitor has a remarkable influence on the oscillation,
connect C10 to V
at the nearest possible position from power GND.
CC
At using this application with the voltage gain reduced, oscillation is liable to be produced. Apply the
capacitor after checking enough for its capacity, type and mounting position.
Note 1: As the oscillation allowance varies according to the printed pattern layout, the standard printed board
of TOSHIBA is recommended to be referred to design it.
5. Power ON/OFF switch
There is power ON/OFF switch at pin8. However, output power is changed by pin8 supply voltage when
pin8 supply voltage is not same pin4 supply voltage, after referring to attached date, select pin8 supply
voltage.
6. Input voltage
When the excessive signal is input, turning-up is produced in the clip waveform.
The turning-up point is V = 300 mVrms (typ.) : V
in
= 9 V, R = 4 Ω, f = 1 kHz : Enough care must be
CC
L
taken for this phenomenon.
Maximum Ratings (Ta = 25°C)
Characteristics
Symbol
Rating
Unit
Supply voltage
V
20
2.5
V
A
CC
Output current (peak/CH)
Power dissipation
I
O (peak)
P
(Note 2)
15.0
W
°C
°C
D
Operating temperature
Storage temperature
T
−20~75
−55~150
opr
T
stg
Note 2: Derated above Ta = 25°C in the proportion of 120 mW/°C.
4
2002-04-05
TOSHIBA [ TOSHIBA ]
