KA3021D
Application Information
1. REFERENCE INPUT & ALL MUTE FUNCTION
Pin 23 (REF) is a reference input pin.
• Reference input
The applied voltage at the reference input pin must be between 1.4V and 6.5V, when VCC=8.5V.
• Mute input
The following input conditions must be satisfied for the normal mute function.
All mute on voltage
All mute off voltage
Below 1V
Above 1.4V
Mute function operation
Normal operation
2. PROTECTION FUNCTION
Thermal shutdown (TSD)
• If the chip temperature rises above 175°C, the thermal shutdown (TSD) circuit is activated and the output circuit is in the
mute state, that is off state. The thermal shutdown(TSD) circuit has a temperature hysteresis of 25°C
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