参数资料
型号: FAB2200UCX
厂商: FAIRCHILD SEMICONDUCTOR CORP
元件分类: 音频/视频放大
英文描述: 1.2 W, 2 CHANNEL, AUDIO AMPLIFIER, PBGA25
封装: 0.40 MM PITCH, WLCSP-25
文件页数: 11/33页
文件大小: 948K
代理商: FAB2200UCX
2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAB2200 Rev. 1.0.1
19
FAB2200
Audio
Subsystem
with
St
ereo
Class-G
Headph
on
eAmplifier
Figure 22. AGC Flow Chart
Is the
present gain setting
below the starting
gain?
Has enough
time (decay speed)
passedsince thelast
gain change?
Is the
output amplitude
above the AGC
threshold?
Can
gain be lowered
by astepwhile staying
above minimum
gain?
Has enough
time (attack speed)
passedsince thelast
gain change?
Set starting gain
I2Cregisters
and reset the timers.
Start
Increase gain by
1 step and reset
the timers.
yes
Reduce gain by
1 step and reset
timers.
no
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