an12976a Panasonic Corporation of North America, an12976a Datasheet - Page 15

• Manufacturer Part Number: an12976a
• Description: Headphone Amplifier Ic With Charge Pump
• Manufacturer: Panasonic Corporation of North America

AN12976A
1. The sequence of the power supply and standby
2. Sequence of VCC and VCCPUMP
Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed.
Technical Data (continued)
Power supply sequence
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.
Audio signal output
Note) *1 : It takes about 20 ms from standby release to signal output.
This IC does not have a rising and falling order in VCC and VCCPUMP. Rising and falling times of them are recommended
1 ms or more.
VCC
VCCPUMP
VCC, VCCPUMP
Power supply
Standby
Off
1 ms or more
Off
Please turn on the power supply first, and then get Standby Off.
20 ms or more *1
On
On
Off
On
Off
On
Ver. AEB
1 ms or more
On
Off
Off
On
On
1 ms or more
Off
On
Off
1) Power Off condition
2) Power On
3) Standby Off
1) Power On condition
2) Standby On
3) Power Off
Basic procedure at Power ON
Basic procedure at Power Off
Standby On
Standby Off
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