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LM49251TL/NOPB bảng dữ liệu(PDF) 21 Page - Texas Instruments

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tên linh kiện LM49251TL/NOPB
Giải thích chi tiết về linh kiện  Stereo Audio Subsystem with Class G Headphone Amplifier and Class D Speaker Amplifier with Speaker Protection
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LM49251TL/NOPB bảng dữ liệu(HTML) 21 Page - Texas Instruments

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LM49251
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SNAS498A – FEBRUARY 2011 – REVISED APRIL 2013
Table 6. Voltage Limit Control Register
BIT
NAME
VALUE
DESCRIPTION
B4
B3
Sets Attack Time based on CSET and RSET
0
0
tATK
ATK1
B4:B3
0
1
1.3 x tATK
ATK2
1
0
2 x tATK
1
1
2.7 x tATK
B2
B1
B0
Sets output power limit level
0
0
0
Voltage Limit disabled
0
0
1
VTH(VLIM) = 3.9VP-P
0
1
0
VTH(VLIM)) = 4.7VP-P
PLEV2
B2:B0
PLEV1
0
1
1
VTH(VLIM)= 5.4VP-P
PLEV0
1
0
0
VTH(VLIM) = 6.2VP-P
1
0
1
VTH(VLIM) = 7.0VP-P
1
1
0
VTH(VLIM) = 7.8VP-P
1
1
1
Voltage Limit disabled
Table 7. No Clip Control Register
BIT
NAME
VALUE
DESCRIPTION
B2
B1
B0
This sets the output clip limit level
0
0
0
NO_CLIP = disabled, OUTPUT_CLIP = disabled
0
0
1
Test Mode
0
1
0
NO_CLIP = enabled, OUTPUT_CLIP = disabled
OCP2
B2:B0
OCP1
0
1
1
low
OCP0
1
0
0
medium
1
0
1
medium high
1
1
0
high
1
1
1
maximum
This sets the release time of the automatic limiter
B1
B0
control circuit.
0
0
1s
RLT1
B4:B3
RTL0
0
1
0.8s
1
0
0.65s
1
1
0.4s
Table 8. Gain Control Register
BIT
NAME
VALUE
DESCRIPTION
0
6dB Loudspeaker gain
B4
LSGAINL
1
12dB Loudspeaker gain
0
6dB Loudspeaker gain
B3
LSGAINR
1
12dB Loudspeaker gain
Copyright © 2011–2013, Texas Instruments Incorporated
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