TDF8544
NXP Semiconductors
I2C-bus controlled 4 50 W power amplifier
5. Block diagram
V
P1
21 (3)
V
P2
7 (16)
ADSEL
SDA SCL
1 (10) 26 (8) 23 (7)
TDF8544
ENGINE START
PROTECTION
5 (9)
DIAG
SELECT
DIAGNOSTIC/
CLIP DETECT
2 (11)
STANDBY/
FAST MUTE
2
STB
I C-BUS
18 (2)
20 (1)
16 (29)
12 (25)
15 (28)
13 (26)
MUTE
26 dB/
OUT3+
OUT3-
IN3
IN1
IN4
IN2
16 dB
PROTECTION/
DIAGNOSTIC
10 (17)
8 (18)
MUTE
26 dB/
OUT1+
OUT1-
16 dB
PROTECTION/
DIAGNOSTIC
22 (6)
24 (4)
MUTE
26 dB/
OUT4+
OUT4-
16 dB
PROTECTION/
DIAGNOSTIC
6 (13)
4 (15)
MUTE
26 dB/
OUT2+
OUT2-
V
P
16 dB
PROTECTION/
DIAGNOSTIC
27 (36)
TAB
11 (24)
14 (27)
SGND
17 (30)
ACGND
9 (23)
PGND1
3 (14)
PGND2
19 (32) 25 (5)
SVR
PGND3 PGND4
001aan045
Pin numbers in parenthesis relate to type TDF8544TH (package HSOP36).
Fig 1. Block diagram
TDF8544
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 August 2011
3 of 54
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