an12949a Panasonic Corporation of North America, an12949a Datasheet - Page 25

• Manufacturer Part Number: an12949a
• Description: Audio Power Ic For Note Pc
• Manufacturer: Panasonic Corporation of North America

AN12949A
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
The power supply and logic sequence
2) The sequence of VCCSP
The timing control of power-ON/OFF and each logic according to the procedure below should be recommended for the best pop
performance caused in switching.
1) The sequence of the power supply and each logic
Technical Data (continued)
A standup and falling time of VCCSP recommend 1 ms more.
VCCSP
SP_STBY
Pre-charge circuit
After SP_STBY Off, the mute of the pop noise measures is turned on
with an internal circuit.
Mute time: 50 ms or less.
Pre-charge circuit turn from ON → OFF time: 50 ms or less
VCCSP (Pin 18, 19)
Off
On
Off
On
Off
On
Please first bring up the power supply, and
then SP standby off.
1 ms or more
Off (High impedance)
On
SDF00043BEB
Off
On
On
Off
1. The power OFF condition
2. Power ON
3. SP_STBY Off
1.
2. SP_STBY On
3.
The basic procedure at the power-on
The basic procedure at the power-off
On
SP Standby are in the ON condition.
The power ON condition
SP Standby are in the ON condition
Power OFF
1 ms or more
Off
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