TDA7377
TYPICAL APPLICATION INFORMATION
LINEAR INTEGRATED CIRCUIT
Diagnostics Facility note:
UTC
TDA7377
built in a diagnostic circuitry, when following events appearing: clipping in the output signal,
thermal shutdown, and output fault including short to GND, short to V
S
and soft short at turn on.
When the event is detected, The information is available across an open collector output (pin 10) through a current
sinking (see Fig 4).The current sinking at pin 10 is triggered when a certain distortion level is reached at any of the
outputs. This function allows gain compression possibility whenever the amplifier is overdriven. The current sinking
at pin 10 also can be triggered When the IC’s operating temperature raise to about 10°C before the shutdown
threshold.
Normally the clip detector signaling produces a low level at pin 10 that is shorter than that present under faulty
conditions; This can be used to discriminate each event (clipping detection, output fault, thermal proximity).
10
R
V
REF
V
PIN
10
UTC TDA7377
Figure 4. Pin10 Diagnostic Circuitry
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UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
6 of 8
QW-R107-064.A
UTC-IC [ UNISONIC TECHNOLOGIES ]
