TDF8544
NXP Semiconductors
I2C-bus controlled 4 50 W power amplifier
Table 12. Instruction byte IB4 …continued
Bit
Description
D6
soft or fast mute select during shut-down via pin STB
0 = activate fast mute during shut-down
1 = activate slow mute during shut-down
16 V overvoltage warning on pin DIAG
D5
D4
0 = 16 V overvoltage warning on pin DIAG disabled
1 = 16 V overvoltage warning on pin DIAG enabled
AC or DC load information on bits DBx[D5:D4]
0 = DC load information on bits DBx[D5:D4]
1 = AC load information on bits DBx[D5:D4]
-
D3
D2
line driver mode or low gain mode selection
0 = line driver mode; common-mode output voltage is 0.23 VP
1 = low gain mode; common-mode output voltage is 0.5 VP; only valid for channels
when gain is set to 16 dB
D1
D0
AC load detection measurement current selection
0 = AC load detection; low measurement current
1 = AC load detection; high measurement current
low VP mute undervoltage level setting
0 = low VP mute undervoltage level set to 5.9 V
1 = low VP mute undervoltage level set to 7.5 V
TDF8544
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 August 2011
26 of 54
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