TDA7377

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

6 of 8

www.unisonic.com.tw

QW-R107-064.A

TYPICAL APPLICATION INFORMATION

Diagnostics Facility note:

UTC TDA7377 built in a diagnostic circuitry, when following events appearing: clipping in the output signal,

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).

UTC TDA7377

10

R

Figure 4. Pin10 Diagnostic Circuitry

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