tda8562q-n1-s420 NXP Semiconductors, tda8562q-n1-s420 Datasheet - Page 5

• Manufacturer Part Number: tda8562q-n1-s420
• Description: 4 X 12 W Single-ended Car Radio Power Amplifier With Dynamic Distortion Detector And Diagnostic Interface
• Manufacturer: NXP Semiconductors

Philips Semiconductors
SHORT
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 T
pin 16 will be active LOW.
July 1994
handbook, full pagewidth
4 x 12 W single-ended car radio power amplifier with
dynamic distortion detector and diagnostic interface
-
CIRCUIT PROTECTION
current
output
stage
V 15
in
V P
short-circuit over the load
vj
reaches 150 C,
Fig.4 Short-circuit waveform.
50 s
5
OPEN COLLECTOR OUTPUT
Pin 16 is an open collector output, which allows pin 16 of
more devices being tied together.
handbook, halfpage
20 ms
Fig.3 Distortion detector waveform.
V 16
V O
V P
0
0
MGA707
Product specification
t
t
TDA8562Q
MGA706
t