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www.fairchildsemi.com
Features
Up to 4W/channel
Drives 8
NO-POP: during power-up/power-down and mute control
Individual control pins to select mute and on/off for
headphone, speaker, microphone, and regulator block
Provides regulated 5V supply for sound codec, etc.
Line output signal-to-noise ratio of 85dB
Sleep mode supply current typically 10
Microphone multiplexing
Total harmonic distortion <0.1%
Microphone amplifier with AGC 40dB dynamic range
Internal Thermal Limiting Circuitry
W
and 4
W
non-powered speakers
m
A
Applications
Multimedia PC motherboards and add-in sound cards
Portable multimedia personal computers
Companion chip to Sigma-Delta Sound Codecs
Sound Channel back-end in Set-top boxes
Description
The RC5512 can be used for driving key functions that are
needed in all multimedia PCs and sound cards. These func-
tions include directly powering speakers and headphone sets,
providing a microphone pre-amplifier with AGC, and having
a 12V to 5V regulator that can isolate the noise from the
sound channel. Each function can be controlled individually,
thus providing power saving features.
Block Diagram
12 to 5V
Regulator
VCC
REGOUT
REGPD
REGSEN
65-5512-01
Soft Start
Thermal
Logic
AGC
5V Mic
Supply
MUX
LLINE RLINE
AGCTC
MICSEL
·
VCCDROPL
VCCDROPR
SPKOUTR
SPKOUTL
SFTSTART
SPKMUTE
SPKPD
RIN
LIN
MICPD
MICIN1
MICIN2
+1
+1
-4
-4
+1
-10
MICOUT
RC5512
RC5512
RAPPER
Family – 4 Watt S tereo S ound Driver
Rev. 1.0.0