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PDF TDA1566 Data sheet ( Hoja de datos )
| Número de pieza | TDA1566 | |
| Descripción | single channel 92 W/1 amplifer | |
| Fabricantes | NXP Semiconductors | |
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TDA1566
www.DataSheet4U.com
I2C-bus controlled dual channel 46 W/2 Ω, single channel
92 W/1 Ω amplifier with load diagnostic features
Rev. 01 — 5 April 2006
Product data sheet
1. General description
The TDA1566 is a car audio power amplifier with a complementary output stage realized
in BCDMOS technology. 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 I2C-bus. With I2C-bus control gain settings
per channel and diagnostic trigger levels can be selected. Failure conditions as well as
load identification can be read with I2C-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 I2C-bus mode and non-I2C-bus mode
I TH version: four I2C-bus addresses controlled by two pins; J version: two I2C-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 I2C-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 VP safe
I All outputs short-circuit proof to VP, GND and across the load
I All pins short-circuit proof to ground
I Temperature controlled gain reduction at high junction temperatures
1 page  
Philips Semiconductors
TDA1566
www.DataSheet4U.com
I2C-bus controlled dual channel/single channel amplifier
EN 1
ADS1 2
IN1+ 3
IN1− 4
SGND 5
DIAG 6
VP1 7
1OHM 8
n.c. 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
VP2 21
IN2+ 22
IN2− 23
SVR 24
SCL 25
SDA 26
TAB 27
TDA1566J
001aad 007
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
Pin description TDA1566TH
Pin Description
1 diagnostic output
2 positive input channel 2
3 negative input channel 2
4 supply voltage ripple decoupling
5 I2C-bus clock input
6 I2C-bus data input/output
7 enable input
8 I2C-bus address select bit 2
9 I2C-bus address select bit 1
10 positive input channel 1
11 negative input channel 1
12 signal ground
TDA1566_1
Product data sheet
Rev. 01 — 5 April 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
5 of 45
5 Page 
Philips Semiconductors
TDA1566
www.DataSheet4U.com
I2C-bus controlled dual channel/single channel amplifier
Rtrip1 = 0.1 × (RPROG − 720) Ω
Rtrip2 = 1.05 × (RPROG − 450) Ω
Rtrip1 and Rtrip2 levels presented refer to the advised value of 1500 Ω. Note that a shorted
load will be interpreted as an amplifier load.
The result of the DC load detection is stored in DB1[D4] and DB1[D5] for channel 1 and in
DB2[D4] and DB2[D5] for channel 2, see Table 12.
Table 12. Interpretation of DC load detection bits
Open load bits
Amplifier load bits DC load valid bit
DB1[D4] and DB2[D4] DB1[D5] and DB2[D5] DB3[D3]
001
011
1
don’t care
1
Don’t care
don’t care
0
Description
amplifier load
line driver load
open load
invalid DC load
detection result
Note that the DC load bits are only valid if DB3[D3] = 1. The DC load detection valid bit is
reset, DB3[D3] = 0, when the DC load detection is started with a not completely
discharged SVR capacitor (VSVR > 0.3 V) or when the DC load detection is interrupted by
an engine start (VP < 7.5 V typical, see Section 9).
6.2.2 AC load detection
The AC load detection is used to detect if AC coupled speakers like tweeters are
connected correctly during assembly. The detection starts when IB1[D2] changes from
LOW to HIGH. A sine wave of a certain frequency (e.g. 19 kHz) needs to be applied to the
inputs of the amplifier. The output voltage over the load impedance will cause an output
current in the amplifier. Output currents larger than 1.15 × Iref will set the AC load
detection bit and no AC load is detected when the output current is less than 0.85 × Iref,
see Figure 8. The reference current Iref is set with an external resistor RPROG (1 %)
connected between the PROG pin and GND. The relation between RPROG and Iref is given
by:
Iref = 390 / RPROG [A] (valid for RPROG between 1.2 kΩ and 4 kΩ).
To set the AC load detection bit the peak output current must pass the 1.15 × Iref threshold
three times. The three ‘threshold cross’ counter is used to prevent false AC load detection
caused by switching the input signal on or off. To reset the slope counter, IB1[D2] needs to
be reset. With RPROG = 1500 Ω the current thresholds are set to 200 mA and 320 mA.
0.78 × Iref
no AC load detected
200 mA
(peak)
1.22 × Iref
AC load detected
320 mA
(peak)
001aad 011
Fig 8. AC load detection limits
The levels presented refer to the advised value of 1500 Ω.
TDA1566_1
Product data sheet
Rev. 01 — 5 April 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
11 of 45
11 Page | ||
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| PDF Descargar | [ Datasheet TDA1566.PDF ] | |
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