TDF8553J datasheet(18/47 Pages) NXP

18 / 47 page

TDF8553J_1

Objective data sheet

Rev. 01 — 3 December 2008

18 of 47

NXP Semiconductors

TDF8553J

× 50 Watt power ampliﬁer and multiple voltage regulator

Table 7.

Regulator 4 (mechanical drive) output voltage control

Bit

Output (V)

0000 (off)

0015

0106

0117

1008.6

1018.0

Table 8.

Regulator 1 (audio) output voltage control

Bit

Output (V)

0 (off)

8.3

8.6

5.0

Table 9.

Instruction byte IB3 bit description

Bit

Symbol

Description

clip detection level

0 = 4 % detection level

1 = 1 % detection level

ampliﬁer channels 1 and 2 gain select

0 = 26 dB gain (normal mode)

1 = 20 dB gain (line-driver mode)

ampliﬁer channels 3 and 4 gain select

0 = 26 dB gain (normal mode)

1 = 20 dB gain (line-driver mode)

ampliﬁer thermal protection pre-warning

0 = warning at 145

°C

1 = warning at 122

°C

disable channel 1

0 = enable channel 1

1 = disable channel 1

disable channel 2

0 = enable channel 2

1 = disable channel 2

disable channel 3

0 = enable channel 3

1 = disable channel 3

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