TDF8554J
I
2
C-bus controlled 4
45
W power amplifier and multiple
voltage regulator
Rev. 1 — 31 August 2011
Product data sheet
1. General description
The TDF8554J is one of a new generation of complementary quad Bridge-Tied Load
(BTL) audio power amplifiers with full I
2
C-bus controlled diagnostics, multiple voltage
regulator and two power switches intended for automotive applications.
The TDF8554J can operate at a battery voltage as low as 6 V making this amplifier
suitable for stop/start-car operation. The amplifier uses a complementary DMOS output
stage in a Silicon-On-Insulator (SOI)-based BCD process. The DMOS output stage
ensures a high power output signal with perfect sound quality. The SOI-based BCD
process ensures a robust amplifier, where latch-up cannot occur, with good separation
between the four independent channels with every component isolated and without
substrate currents.
The multiple voltage regulator comprises four programmable voltage regulators, one
standby regulator and two power switches.
The TDF8554J is soft- and hardware downwards-compatible with its predecessor
TDA8589XJ.
The TDF8554J includes features, such as selectable undervoltage for stop/start-cars
which can be selected with additional I
2
C-bus instruction bytes. If these additional bytes
are not sent, the TDF8554J has the same functionality as its predecessor IPAS
TDA8589XJ.
2. Features and benefits
Amplifier
Stop/start-car prepared: keeps operating without audible disturbance during
engine start at a battery voltage as low as 6 V
I
2
C-bus mode (3.3 V and 5 V compliant)
Can drive 2
or 4
loads
Speaker fault detection
Start-up diagnostics with load detection: open, short, present; filtered for door-slam
and chatter relays
AC load (tweeter) detection with low and high current mode
Gain select after start-up without audible disturbance
Programmable gain (26 dB and 16 dB), independently programmable for the front
and rear channels
Line driver mode (16 dB and mid-tap voltage 0.25V
P
for stop/start-cars)
Programmable clip detection: 2 %, 5 % or 10 %
NXP Semiconductors
TDF8554J
4
45
W power amplifier with multiple voltage regulator
Programmable thermal pre-warning
If the temperature protection of the regulator is activated, the amplifier is muted
before the regulator is switched off
Loss of ground and open V
P
safe (with 150 m series impedance and a maximum
supply decoupling capacitor of 2200
F)
All amplifier outputs short-circuit proof to ground, supply voltage and across the
load (channel independent)
All pins short-circuit proof to ground
Temperature-controlled gain reduction to prevent audio holes at high junction
temperatures
Programmable low battery voltage detection to enable 7.5 V or 6 V minimum
battery voltage operation
Overvoltage protection (load-dump safe up to V
P
= 50 V) and overvoltage
pre-warning at 16 V
Offset detection
Multiple regulator
Good stability for any regulator with almost any output capacitor
Five voltage regulators (microcontroller, display, audio processor, mechanical
digital and mechanical drive)
I
2
C-bus controlled
Selectable output voltages for regulators 1, 4 and 5
Low dropout voltage PNP output stages
High supply voltage ripple rejection
Low noise for all regulators
Two power switches (antenna switch and amplifier switch)
Standby regulator (microcontroller supply) operational during load dump and
thermal shut-down
Low standby quiescent current (only regulator 2 operational)
Backup functionality for regulator 2
Protection
If connection to the battery voltage is reversed, all regulator voltages will be zero
Able to withstand output voltages up to 18 V if supply line is short-circuited
Thermal protection to avoid thermal breakdown
Load-dump protection
Regulator outputs protected from DC short-circuit to ground or to supply voltage
All regulators protected by foldback current limiting
Power switches protected from loss-of-ground
TDF8554J
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 31 August 2011
2 of 56
NXP Semiconductors
TDF8554J
4
45
W power amplifier with multiple voltage regulator
3. Quick reference data
Table 1.
Amplifiers
V
P(oper)
I
q
P
o
operating supply voltage R
L
= 4
quiescent current
output power
no load
no load; V
P
= 7 V
R
L
= 4
;
V
P
= 14.4 V; maximum power;
V
i
= 2 V RMS square wave
R
L
= 4
;
V
P
= 14.4 V; THD = 0.5 %
R
L
= 4
;
V
P
= 14.4 V; THD = 10 %
R
L
= 2
;
V
P
= 14.4 V; THD = 10 %
R
L
= 2
;
V
P
= 14.4 V; maximum power;
V
i
= 2 V RMS square wave
THD
V
n(o)
total harmonic distortion
output noise voltage
P
o
= 1 W to 12 W; f
i
= 1 kHz; R
L
= 4
filter 20 Hz to 22 kHz (6th order); R
S
= 50
amplifier mode
line driver mode
Voltage regulators
Supply
V
P
supply voltage
regulators 1, 3, 4 and 5 on
regulator 2 on
jump start for t < 10 minutes
load dump protection for t
50 ms and
t
r
2.5 ms
overvoltage for shut-down
I
q(tot)
V
O(reg)
total quiescent current
regulator output voltage
standby mode; V
P
= 14.4 V
0.5 mA
I
O
400 mA; 12 V < V
P
< 18 V;
selectable via I
2
C-bus
IB2[D3:D2] = 01
IB2[D3:D2] = 10
IB2[D3:D2] = 11
Regulator 2
V
O(reg)
regulator output voltage
0.5 mA
I
O
350 mA; 10 V
V
P
18 V
TDF8554J/N4
TDF8554J/N2
Regulator 3
V
O(reg)
regulator output voltage
0.5 mA
I
O
300 mA; 10 V
V
P
18 V
3.1
3.3
3.5
V
3.1
4.75
3.3
5.0
3.5
5.25
V
V
7.9
8.1
8.3
8.3
8.5
8.7
8.7
8.9
9.1
V
V
V
Regulator 1
10.0
40
-
-
20
-
14.4
-
-
-
-
150
18
-
30
50
-
190
V
V
V
V
V
A
-
-
40
25
60
33
V
V
6
-
-
37
18
23
40
58
-
14.4
260
190
40
20
25
44
64
0.01
18
350
-
-
-
-
-
-
0.1
V
mA
mA
W
W
W
W
W
%
Quick reference data
Conditions
Min
Typ
Max
Unit
Symbol Parameter
TDF8554J
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 31 August 2011
3 of 56
NXP Semiconductors
TDF8554J
4
45
W power amplifier with multiple voltage regulator
Table 1.
Quick reference data
…continued
Conditions
0.5 mA
I
O
800 mA; 10 V
V
P
18 V;
selectable via I
2
C-bus
IB2[D7:D5] = 001
IB2[D7:D5] = 010
IB2[D7:D5] = 011
IB2[D7:D5] = 100
4.75
5.7
6.6
8.1
5.0
6.0
7.0
8.6
5.25
6.3
7.4
9.1
V
V
V
V
Min
Typ
Max
Unit
Symbol Parameter
Regulator 4
V
O(reg)
regulator output voltage
Regulator 5
V
O(reg)
regulator output voltage
0.5 mA
I
O
400 mA
10 V
V
P
18 V; IB1[D7:D4] = 0001
10 V
V
P
18 V; IB1[D7:D4] = 0010
10 V
V
P
18 V; IB1[D7:D4] = 0011
10.5 V
V
P
18 V; IB1[D7:D4] = 0100
11 V
V
P
18 V; IB1[D7:D4] = 0101
11.5 V
V
P
18 V; IB1[D7:D4] = 0110
13 V
V
P
18 V; IB1[D7:D4] = 0111
14.2 V
V
P
18 V; IB1[D7:D4] = 1000
12.5 V
V
P
18 V; IB1[D7:D4] = 1001
Power switches
V
do
dropout voltage
switch 1; I
O
= 400 mA
switch 2; I
O
= 400 mA
[1]
5.7
6.65
7.8
8.55
9
9.5
9.9
11.8
6.0
7.0
8.2
9.0
9.5
10
10.4
12.5
6.3
7.37
8.6
9.45
10.0
10.5
10.9
13.2
-
1.1
1.1
V
V
V
V
V
V
V
V
V
V
V
V
P
1.0 -
-
-
0.6
0.6
If the regulator is set to a voltage higher than the supply voltage, the regulator will act as a switch with a voltage drop of 1 V.
4. Ordering information
Table 2.
Ordering information
Package
Name
TDF8554J/N2
[1]
TDF8554J/N4
[2]
[1]
[2]
Type number
Description
plastic DIL-bent-SIL power package; 37 leads
(lead length 6.8 mm)
Version
SOT725-1
DBS37P
V
O(reg2)
= 5.0 V
V
O(reg2)
= 3.3 V
TDF8554J
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 31 August 2011
4 of 56
NXP Semiconductors
TDF8554J
4
45
W power amplifier with multiple voltage regulator
5. Block diagram
BUCAP
36
REGULATOR 2
37
REG2
BACKUP
SWITCH
REFERENCE
VOLTAGE
TEMPERATURE &
LOAD DUMP
PROTECTION VOLTAGE
REGULATOR
V
P
35
REGULATOR 1
30
REG1
TDA8554J
REGULATOR 3
31
REG3
ENABLE
LOGIC
REGULATOR 4
33
REG4
REGULATOR 5
V
reg2
SWITCH 1
34
REG5
29
SW1
SWITCH 2
40 μs
RESCAP
28
27
SW2
26
32
20
6
25
22
STANDBY/ MUTE
I
2
C-BUS
INTERFACE
CLIP DETECT/ DIAGNOSTIC
RST
GND
V
P1
V
P2
DIAG
SDA
SCL
STB
2
4
IN1
11
MUTE
9
16 dB
26 dB
OUT1+
OUT1-
7
PROTECTION/
DIAGNOSTIC
IN2
12
MUTE
5
16 dB
26 dB
OUT2+
OUT2-
3
PROTECTION/
DIAGNOSTIC
IN3
15
MUTE
17
16 dB
26 dB
OUT3+
OUT3-
19
PROTECTION/
DIAGNOSTIC
IN4
14
VP
MUTE
21
16 dB
26 dB
OUT4+
OUT4-
23
PROTECTION/
DIAGNOSTIC
TEMPERATURE & LOAD
DUMP PROTECTION
AMPLIFIER
10
SVR
13
SGND
ACGND
16
8
1
18
24
PGND1
PGND3
PGND4
PGND2/TAB
aaa-000380
Fig 1.
Block diagram
TDF8554J
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 1 — 31 August 2011
5 of 56
PCB设计
