TDF8544
NXP Semiconductors
I2C-bus controlled 4 50 W power amplifier
13. Application information
(1)
R
ADSEL
V
P1
21 (3)
V
P2
7 (16)
ADSEL
SDA SCL
1 (10) 26 (8) 23 (7)
+5 V
TDF8544
ENGINE START
PROTECTION
10 kΩ
10 kΩ
5 (9)
DIAG
SELECT
DIAGNOSTIC/
CLIP DETECT
2 (11)
STB
STANDBY/
FAST MUTE
2
I C-BUS
470 nF
470 nF
470 nF
470 nF
18 (2) OUT3+
20 (1) OUT3-
R
R
R
R
s
s
s
s
IN3
IN1
IN4
IN2
16 (29)
12 (25)
15 (28)
13 (26)
MUTE
26 dB/
(2)
16 dB
PROTECTION/
DIAGNOSTIC
10 (17) OUT1+
MUTE
26 dB/
(2)
8 (18)
OUT1-
16 dB
PROTECTION/
DIAGNOSTIC
22 (6)
24 (4)
OUT4+
OUT4-
MUTE
26 dB/
(2)
16 dB
PROTECTION/
DIAGNOSTIC
6 (13)
4 (15)
OUT2+
OUT2-
MUTE
26 dB/
(2)
V
P
16 dB
PROTECTION/
DIAGNOSTIC
27 (36) TAB
11 (24)
SVR
14 (27)
SGND
17 (30)
ACGND
9 (23)
PGND1
3 (14)
PGND2
19 (32) 25 (5)
PGND3 PGND4
(1)
(1)
2.2 ꢀF
10 ꢀF
001aan048
(1) The SVR and ACGND capacitors and the RADSEL resistor must be connected to pin SGND before they are connected to pin
PGNDn; the ACGND capacitor value must be close to 4 the input capacitor value. 4 470 nF capacitors can be used as an
alternative to the 2.2 F capacitor shown.
(2) For EMC reasons, a 10 nF capacitor can be connected between each amplifier output and ground.
Fig 30. Test and application diagram
TDF8544
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 29 August 2011
44 of 54
NXP [ NXP ]
