TDA1566
I
2
C-bus controlled dual channel 46 W/2
Ω,
single channel
92 W/1
Ω
amplifier with load diagnostic features
Rev. 02 — 20 August 2007
Product data sheet
1. General description
The TDA1566 is a car audio power amplifier with a complementary output stage realized
in BCDMOS. The TDA1566 has two Bridge Tied Load (BTL) output stages and comes in a
HSOP24 or DBS27P package.
The TDA1566 can be controlled with or without I
2
C-bus. With I
2
C-bus control gain settings
per channel and diagnostic trigger levels can be selected. Failure conditions as well as
load identification can be read with I
2
C-bus. The load identification detects whether the
outputs of a BTL channel are connected with a DC or AC load and discriminates between
a speaker load, a line driver load and an open (unconnected) load.
The TDA1566 can be configured in a single BTL mode and drive a 1
Ω
load. For the single
BTL mode it is necessary to connect on the Printed-Circuit Board (PCB) the outputs of
both BTL channels in parallel.
2. Features
I
Operates in I
2
C-bus mode and non-I
2
C-bus mode
I
TH version: four I
2
C-bus addresses controlled by two pins; J version: two I
2
C-bus
addresses controlled by one pin
I
Two 4
Ω
or 2
Ω
capable BTL channels or one 1
Ω
capable BTL channel
I
Low offset
I
Pop free off/standby/mute/operating mode transitions
I
Speaker fault detection
I
Selectable gain (26 dB and 16 dB)
I
In I
2
C-bus mode:
N
DC load detection: open, short and speaker or line driver present
N
AC load (tweeter) detection
N
Programmable trigger levels for DC and AC load detection
N
Per channel programmable gain (26 dB and 16 dB, selectable per channel)
N
Selectable diagnostic levels for clip detection and thermal pre-warning
N
Selectable information on the DIAG pin for clip information of each channel
separately and independent enabling of thermal-, offset- or load fault
I
Independent short-circuit protection per channel
I
Loss of ground and open V
P
safe
I
All outputs short-circuit proof to V
P
, GND and across the load
I
All pins short-circuit proof to ground
I
Temperature controlled gain reduction at high junction temperatures
NXP Semiconductors
TDA1566
I
2
C-bus controlled dual channel/single channel amplifier
I
Fault condition diagnosis per channel: short to ground, short to supply, shorted lead
and speaker fault (wrongly connected)
I
Low battery voltage detection
I
TH version: pin compatible with the TDA8566TH1
3. Ordering information
Table 1.
Ordering information
Package
Name
TDA1566TH
TDA1566J
HSOP24
DBS27P
Description
plastic, heatsink small outline package; 24 leads; low
stand-off height
plastic DIL-bent-SIL (special bent) power package;
27 leads (lead length 6.8 mm)
Version
SOT566-3
SOT827-1
Type number
4. Block diagram
ADS2
8
ADS1
9
SDA
6
SCL
5
V
P1
14
V
P2
23
22
13
EN
7
MODE
SELECT
I
2
C-BUS
SELECT DIAGNOSTIC
/CLIP DETECT
1
DIAG
PROG
CLIP
IN1+
10
16
MUTE
26 dB/
16 dB
18
OUT1+
OUT1−
IN1−
11
MUTE
PROTECTION
/DIAGNOSTIC
IN2+
2
19
MUTE
26 dB/
16 dB
21
PROTECTION
/DIAGNOSTIC
OUT2+
OUT2−
IN2−
3
V
P
MUTE
15
1OHM
TDA1566TH
24
TAB
4
SVR
12
SGND
17
PGND1
20
PGND2
001aac999
Fig 1. Block diagram (TDA1566TH)
TDA1566_2
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 20 August 2007
2 of 46
NXP Semiconductors
TDA1566
I
2
C-bus controlled dual channel/single channel amplifier
EN
ADS1
IN1+
IN1−
SGND
DIAG
V
P1
1OHM
n.c.
1
2
3
4
5
6
7
8
9
OUT1+ 10
n.c. 11
PGND1 12
OUT1− 13
n.c. 14
OUT2+ 15
PGND2 16
n.c. 17
OUT2− 18
n.c. 19
PROG 20
V
P2
21
IN2+ 22
IN2− 23
SVR 24
SCL 25
SDA 26
TAB 27
001aad007
TDA1566J
Fig 4. Pin configuration for non mounting base TDA1566J (front)
5.2 Pin description
Table 2.
Symbol
DIAG
IN2+
IN2−
SVR
SCL
SDA
EN
ADS2
ADS1
IN1+
IN1−
SGND
TDA1566_2
Pin description TDA1566TH
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Description
diagnostic output
positive input channel 2
negative input channel 2
supply voltage ripple decoupling
I
2
C-bus clock input
I
2
C-bus data input/output
enable input
I
2
C-bus address select bit 2
I
2
C-bus address select bit 1
positive input channel 1
negative input channel 1
signal ground
© NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 02 — 20 August 2007
5 of 46
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