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參數(shù)資料
| 型號(hào)： | 935201690112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 55 W, 2 CHANNEL, AUDIO AMPLIFIER, PZIP17 |
| 封裝： | POWER, PLASTIC, SOT-243-1, DIL-BENT-SIL, 17 PIN |
| 文件頁(yè)數(shù)： | 11/16頁(yè) |
| 文件大小： | 149K |
| 代理商： | 935201690112 |
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2000 Jan 28
4
Philips Semiconductors
Product specication
2
× 40 W/2 stereo BTL car radio power amplier
with differential inputs and diagnostic outputs
TDA8566Q
PINNING
SYMBOL
PIN
DESCRIPTION
IN1+
1
channel 1 input positive
IN1
2
channel 1 input negative
SGND
3
small signal ground
CLIP
4
clip detection
VP1
5
supply voltage 1
OUT1+
6
channel 1 speaker output positive
PGND1
7
channel 1 negative power supply
(ground)
OUT1
8
channel 1 speaker output negative
n.c.
9
not connected
OUT2+
10
channel 2 speaker output positive
PGND2
11
channel 2 negative power supply
(ground)
OUT2
12
channel 2 speaker output negative
VP2
13
supply voltage 2
MODE
14
mode select switch
(standby/mute/operating)
DIAG
15
short-circuit and temperature
pre-warning diagnostic
IN2+
16
channel 2 input positive
IN2
17
channel 2 input negative
handbook, halfpage
TDA8566Q
MGD101
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
IN1
+
IN1
SGND
CLIP
VP1
OUT1
+
PGND1
OUT1
n.c.
IN2
IN2
+
DIAG
MODE
VP2
OUT2
PGND2
OUT2
+
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TDA8566Q contains 2 identical amplifiers and can be
used for BTL applications. The gain of each amplifier is
fixed at 26 dB. Special features of this device are:
1. Mode select switch
2. Clip detection
3. Short-circuit diagnostic
4. Temperature pre-warning
5. Open-collector outputs
6. Differential inputs.
Mode select switch (pin 14)
Standby: low supply current (<100 A)
Mute: input signal suppressed
Operating: normal on condition.
Since this pin has a very low input current (<40
A), a low
cost supply switch can be applied. To avoid switch-on
plops, it is advisable to keep the amplifier in the mute mode
for a period of
≥150 ms (charging the input capacitors at
pins 1, 2, 16 and 17). This can be realized by
microcontroller control or by an external timing circuit (see
Fig.7).
Clip detection (pin 4)
When clipping occurs at one or more output stages, the
dynamic distortion detector becomes active and pin 4
goes LOW. This information can be used to drive a sound
processor or a DC volume control to attenuate the input
signal and so limit the level of distortion. The output level
of pin 4 is independent of the number of channels that are
being clipped. The clip detection circuit is disabled in a
short-circuit condition, so if a fault condition occurs at the
outputs, pin 4 will remain at a HIGH level. The clip
detection waveforms are illustrated in Fig.3.
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