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參數(shù)資料
| 型號： | 935258500112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 55 W, 2 CHANNEL, AUDIO AMPLIFIER, PZIP13 |
| 封裝： | POWER, PLASTIC, SOT-141-6, DIL-BENT-SIL, 13 PIN |
| 文件頁數(shù)： | 19/23頁 |
| 文件大?。?/td> | 192K |
| 代理商： | 935258500112 |
1997 Feb 20
5
Philips Semiconductors
Product specication
2
× 40 W/2 stereo BTL car radio power
amplier with diagnostic facility
TDA8563AQ
SHORT-CIRCUIT PROTECTION
When a short-circuit occurs at one or more outputs to
ground or to the supply voltage, the output stages are
switched off until the short-circuit is removed and the
device is switched on again, with a delay of approximately
20 ms, after removal of the short-circuit. During this
short-circuit condition, pin 12 is continuously low.
When a short-circuit across the load of one or both
channels occurs the output stages are switched off during
approximately 20 ms. After that time it is checked during
approximately 50
s to see whether the short-circuit is still
present. Due to this duty cycle of 50
s/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA).
During this short-circuit condition, pin 12 is low for 20 ms
and high for 50
s (see Fig.4).
The power dissipation in any short-circuit condition is
very low.
TEMPERATURE DETECTION
When the virtual junction temperature Tvj reaches 150 °C,
pin 12 will become continuously low.
OPEN COLLECTOR OUTPUT
Pin 12 is an open collector output, which allows pin 12 of
more devices being tied together.
Fig.4 Short-circuit waveform.
handbook, full pagewidth
MGA722
short-circuit over the load
20 ms
50 s
t
VP
current
in
output
stage
V12
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