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參數(shù)資料
| 型號： | 935059300112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 12 W, 4 CHANNEL, AUDIO AMPLIFIER, PZIP17 |
| 封裝： | POWER, PLASTIC, SOT-243-1, DIL-BENT-SIL, 17 PIN |
| 文件頁數(shù)： | 14/18頁 |
| 文件大小： | 157K |
| 代理商： | 935059300112 |
July 1994
5
Philips Semiconductors
Product specication
4 x 12 W single-ended car radio power amplier with
dynamic distortion detector and diagnostic interface
TDA8562Q
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 16 is continuously low.
When a short-circuit across the load of one or more
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 16 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 16 will be active LOW.
OPEN COLLECTOR OUTPUT
Pin 16 is an open collector output, which allows pin 16 of
more devices being tied together.
Fig.3 Distortion detector waveform.
handbook, halfpage
0
VP
VO
t
0
MGA706
V16
Fig.4 Short-circuit waveform.
handbook, full pagewidth
MGA707
short-circuit over the load
20 ms
50
s
t
VP
current
in
output
stage
V15
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