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TDA8566Q 데이터시트(PDF) 5 Page - NXP Semiconductors

부품명 TDA8566Q
상세설명  2 x 25 W BTL stereo car radio power amplifier with differential inputs and diagnostic outputs
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제조업체  PHILIPS [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

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1998 Sep 23
5
Philips Semiconductors
Product specification
2
× 25 W BTL stereo car radio power amplifier
with differential inputs and diagnostic outputs
TDA8566Q
Short-circuit diagnostic (pin 15)
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 the removal of the short-circuit). During this
short-circuit condition, pin 15 is continuously low.
When a short-circuit occurs across the load of one or both
channels, the output stages are switched off for
approximately 20 ms. After approximately 50
µs the load
condition is again checked to see if the short-circuit is still
present. Due to this duty cycle of 50
µs/20 ms the average
current consumption during this short-circuit condition is
very low (approximately 40 mA). During this short-circuit
condition, pin 15 is low for 20 ms and high for 50
µs (see
Fig.4). The power dissipation in any short-circuit condition
is very low.
Temperature pre-warning (pin 15)
When the junction temperature (Tvj) reaches 145 °C,
pin 15 will become continuously low.
Open-collector outputs
Pins 4 and 15 are open-collector outputs, therefore more
devices can be tied together. Pins 4 and 15 can also be
tied together. An external pull-up resistor is required.
Differential inputs
The input stage is a high-impedance fully differential
balanced input stage that is also capable of operating in a
single-ended mode with one of the inputs capacitively
coupled to an audio ground. It should be noted that if a
source resistance is added (input voltage dividers) the
CMRR degrades to lower values.
Fig.3 Clip detection waveforms.
handbook, halfpage
V4
0
VP
Vout
0
t
MGD103
Fig.4 Short-circuit diagnostic timing diagram.
handbook, full pagewidth
MGA707
short-circuit over the load
20 ms
50
µs
t
t
VP
current
in
output
stage
V15


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