an12949a Panasonic Corporation of North America, an12949a Datasheet - Page 20

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

AN12949A
Technical Data (continued)
The explanation of the function for mainly (continued)
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
1. Speaker amplifier (continued)
3) As for the standby control by Pin34 and Pin35, an inside circuit is an AND form.
4) Off of speaker mute is delayed with the timer circuit from a standby release.
5) An input amplifier is the composition that it moves based on 0 V.
Input / output gain
Input impedance
Output impedance
Maximum input level
Maximum output level
Ability of the output drive
1) Thermal protection circuit
2) Output pin short protection circuit
Note) Operation is not guaranteed although the protection circuit is built in. Moreover, hundred percent inspection is not guaranteed.
Design reference value of speaker amplifier
Protection circuit for speaker amplifier
A speaker amplifier starts when either of Pin34 or Pin35 is made Low. (Refer to the
This is for power supply on pop sound countermeasure.
(Refer to the • The power supply and logic sequence in the
A inside circuit can be started quickly after a standby release by this composition.
Before it is outputted, I have 0 V shifted from the standard to 2.5 V as for the speaker amplifier output.
The thermal protection circuit operates at a Tj of approximately 150°C.
The thermal protection circuit is reset automatically when the temperature drops.
If short-circuit is no longer detected, it will return automatically.
Parameter
Output pin-power supply line short protection
Output-to-output pin short protection
Output pin-GND line short protection
Equal to or more than 4 Ω of loads
Design reference value
Equal to or less than 1 Ω
1.4 W: RL = 8 Ω
2.2 W: RL = 4 Ω
+20.0 dB
0 dBV
10 kΩ
SDF00043BEB
Technical Data and use.)
A setup by external resistance is possible for the gain of
input amplifier.
A setup by external resistance is possible.
But, it limits into the sound band range of equal to or less
than 50 kHz.
The maximum output level of input amplifier.
The time of the warp ( to 5th of THD ) of 1% of output.
The time of the warp ( to 5th of THD ) of 10% of output.
Control Pin Mode Table.)
Note
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