1
Multimedia ICs
Headphone / speaker amplifier for
notebook computers
BA7786FP-Y / BA7787FS
The BA7786FP-Y and BA7787FS are sound amplifiers designed for notebook computers, and contain a suspend
function and input pins for the system beep and PM beep sounds used by notebook computers. In short, this single-
chip IC contains all the analog audio components needed for notebook computers.
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Applications
Notebook computers
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Features
1) Stereo headphone amplifier that supports mixing
input, along with a stereo speaker amplifier
(BA7786FP-Y) or BTL monaural speaker amplifier
(BA7787FS).
2) Internal anti-pop circuit, to prevent the popping sounds
that occur when the power is turned on and off.
3) Internal electronic volume switch and mute circuit.
4) Separate suspend modes for the headphone amplifi-
er and speaker amplifier, for low-power-consumption
computers .
5) Two beep input pins, a necessity for notebook com-
puters.
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Absolute maximum ratings (Ta = 25°C)
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Recommended operating conditions (Ta = 25°C)
Parameter Symbol Limits Unit
Power supply voltage VCC V6
Power
dissipation
mW
850
* 1
Pd
600
* 2
Operating temperature Topr
Tstg
°C
°C
– 10 ~ + 70
Storage temperature – 55 ~ + 125
BA7786FP-Y
BA7787FS
*
1 Reduced by 6.8mW for each increase in Ta of 1°C over 25°C.
*
2 Reduced by 6.0mW for each increase in Ta of 1°C over 25°C.
Parameter Symbol Typ. Unit
Power supply voltage VCC V
Min. Max.
4.5 5.0 5.5
Product S.P.amp Other functions
BA7786FP-Y
BA7787FS
H.P.amp
Stereo
Stereo
Stereo
Monaural
SYSTEM / PM BEEP input, SUSPEND, EVR, MUTE,
BEEP level control