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SM6801A Datasheet(PDF) 10 Page - Nippon Precision Circuits Inc

Part # SM6801A
Description  Class-D Mono Amplifier for Portable Device
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM6801A Datasheet(HTML) 10 Page - Nippon Precision Circuits Inc

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SM6801A
SEIKO NPC CORPORATION —10
Input Equalizer (IN, EQP, EQN)
An input equalizer network can be connected to pins IN, EQP and EQN, as shown in the input equivalent cir-
cuit and equalizer circuit below.
The frequency response of the equalizer circuit is given by the following equation, where
ƒ is the frequency.
Dynamic Range Compression Mode (DRCN)
The dynamic range compression mode is set when DRCN is LOW. When a compression mode is used, the gain
for small input signals is increased while large input signals are converted using a curve that performs soft-clip-
ping. This increases the average sound pressure level emitted from the speaker during playback.
EQN
VREF1
EQP 5
6
R04
R03 C03
C04
R01
60k
R02 C02
60k
IN
4
C01
IN'
+
Response =
20 × log
10
[dB]
11
60000
1
R04
++
+ 2πƒC04
1
2
πƒC03
R03
+
+
1
2
πƒC01
1
1
60000
1
R01
+
1
+
1
2
πƒC02
R02
+
1
-20
-15
-10
-5
0
5
10
-40
-35
-30
-25 -20
-15
-10
-5
0
5
10
-40
-35
-30
-25
Input [dBV]
normal mode
DRC mode


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