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PDF TDA7575 Data sheet ( Hoja de datos )
| Número de pieza | TDA7575 | |
| Descripción | MULTIFUNCTION DUAL BRIDGE POWER AMPLIFIER WITH INTEGRATED DIGITAL DIAGNOSTICS | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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TDA7575
MULTIFUNCTION DUAL BRIDGE POWER AMPLIFIER
WITH INTEGRATED DIGITAL DIAGNOSTICS
s DMOS POWER OUTPUT
s NON-SWITCHING HI-EFFICIENCY
s SINGLE-CHANNEL 1Ω DRIVING CAPABILITY
s HIGH OUTPUT POWER CAPABILITY 2x28W/
4Ω @ 14.4V, 1KHZ, 10% THD, 2x40W/4Ω EIAJ
s MAX. OUTPUT POWER 2x75W/2Ω, 1x150W/1Ω
s SINGLE-CHANNEL 1Ω DRIVING CAPABILITY
– 84W UNDISTORTED POWER
– FULL I2C BUS DRIVING WITH 4 ADDRESS
POSSIBILITIES:
– ST-BY, PLAY/MUTE, GAIN 12/26dB, FULL
DIGITAL DIAGNOSTIC
s POSSIBILITY TO DISABLE THE I2C
s DIFFERENTAL INPUTS
s FULL FAULT PROTECTION
s DC OFFSET DETECTION
s TWO INDEPENDENT SHORT CIRCUIT
PROTECTIONS
s CLIPPING DETECTOR PIN WITH
SELECTABLE THRESHOLD (2%/10%)
s ST-BY/MUTE PINS
DESCRIPTION
The TDA7575 is a new BCD technology DUAL
BRIDGE type of car radio amplifier in PowerSO36
package specially intended for car radio applications.
MULTIPOWER BCD TECHNOLOGY
MOSFET OUTPUT POWER STAGE
PowerSO36 (Slug up)
ORDERING NUMBER: TDA7575
Thanks to the DMOS output stage the TDA7575 has
a very low distortion allowing a clear powerful sound.
Among the features, its superior efficiency perfor-
mance coming from the internal exclusive structure,
makes it the most suitable device to simplify the ther-
mal management in high power sets.The dissipated
output power under average listening condition is in
fact reduced up to 50% when compared to the level
provided by conventional class AB solutions.
This device is equipped with a full diagnostic array
that communicates the status of each speaker
through the I2C bus. The TDA7575 has also the possi-
bility of driving loads down to 1Ω paralleling the outputs
into a single channel. It is also possible to disable the
I2C and control the TDA7575 by means of the usual ST-
BY and MUTE pins.
BLOCK DIAGRAM
ADDRESS
A B CLK DATA
VS
VCC
CD_OUT
IN1+
IN1-
I2CBUS
IN2+
CLIP
DETECTOR
SHORT CIRCUIT
PROTECTION
OUT1+
OUT1-
OUT2+
IN2- OUT2-
SHORT CIRCUIT
PROTECTION
I2C EN
SVR ST-BY/HE S_GND PW_GND TAB 1Ω MUTE
D01AU1269
October 2002
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/17
1 page  
TDA7575
ELECTRICAL CHARACTERISTCS: (continued)
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit
ICDL Clip Pin Low Sink Current
CD Clip detect THD level
CD on; VCD < 300mV
D0 (IB1) = 0
1 mA
0.8 1.3 2.5
%
D0 (IB1) = 1
5 10 15 %
(*) ST-BY Pin high enables I2C bus; ST-BY Pin low puts the device in ST-BY condition.(see “prog” for more details)
TURN ON DIAGNOSTICS (Power Amplifier Mode)
Pgnd
Short to GND det. (below this Power Amplifier in st-by condition
limit, the Output is considered in
Short Circuit to GND)
1.2 V
Pvs Short to Vs det. (above this
limit, the Output is considered in
Short Circuit to VS)
Vs -0.9
V
Pnop
Normal operation
thresholds.(Within these limits,
the Output is considered
without faults).
1.8 Vs -1.5 V
Lsc Shorted Load det.
0.5 Ω
Lop Open Load det.
130 Ω
Lnop Normal Load det.
1.5 70 Ω
TURN ON DIAGNOSTICS (Line Driver Mode)
Pgnd
Short to GND det. (below this Power Amplifier in st-by
limit, the Output is considered in
Short Circuit to GND)
1.2 V
Pvs Short to Vs det. (above this
limit, the Output is considered in
Short Circuit to VS)
Vs -0.9
V
Pnop
Normal operation
thresholds.(Within these limits,
the Output is considered
without faults).
1.8 Vs -1.5 V
Lsc Shorted Load det.
1.5 Ω
Lop Open Load det.
400 Ω
Lnop Normal Load det.
4.5 200 Ω
PERMANENT DIAGNOSTICS (Power Amplifier Mode or Line Driver Mode)
Pgnd
Short to GND det. (below this Power Amplifier in Mute or Play
limit, the Output is considered in condition, one or more short circuits
Short Circuit to GND)
protection activated
1.2 V
Pvs Short to Vs det. (above this
limit, the Output is considered in
Short Circuit to VS)
Vs - 0.9
V
Pnop
Normal operation
thresholds.(Within these limits,
the Output is considered
without faults).
1.8 Vs -1.5 V
Lsc Shorted Load det.
Pow. Amp. mode
0.5 Ω
Line Driver mode
1.5 Ω
5/17
5 Page 
Examples of bytes sequence
1 - Turn-On diagnostic - Write operation
Start Address byte with D0 = 0
TDA7575
ACK IB1 with D6 = 1 ACK IB2 ACK STOP
2 - Turn-On diagnostic - Read operation
Start Address byte with D0 = 1
ACK DB1 ACK DB2 ACK STOP
The delay from 1 to 2 can be selected by software, starting from T.B.D. ms
3a - Turn-On of the power amplifier with mute on, diagnostic defeat.
Start Address byte with D0 = 0
ACK IB1 ACK IB2 ACK STOP
X000XXXX
XXX1XX1X
3b - Turn-Off of the power amplifier
Start Address byte with D0 = 0
ACK IB1 ACK IB2 ACK STOP
X0XXXXXX
XXX0XXXX
4 - Offset detection procedure enable
Start Address byte with D0 = 0
ACK IB1 ACK IB2 ACK STOP
XX1XX1XX
XXX1XXXX
5 - Offset detection procedure stop and reading operation (the results are valid only for the offset detection bits
(D2 of the bytes DB1, DB2, DB3, DB4).
Start Address byte with D0 = 1
ACK
DB1
ACK
DB2
ACK STOP
s The purpose of this test is to check if a D.C. offset (2V typ.) is present on the outputs, produced by input
capacitor with anomalous leackage current or humidity between pins.
s The delay from 4 to 5 can be selected by software, starting from T.B.D. ms
DIAGNOSTICS FUNCTIONAL DESCRIPTION:
a) TURN-ON DIAGNOSTIC.
It is activated at the turn-on (stand-by out) under I2C bus request. Detectable output faults are:
– SHORT TO GND
– SHORT TO Vs
– SHORT ACROSS THE SPEAKER
– OPEN SPEAKER
To verify if any of the above misconnections are in place, a subsonic (inaudible) current pulse (fig. A) is internally
generated, sent through the speaker(s) and sunk back.The Turn On diagnostic status is internally stored until a
successive diagnostic pulse is requested (after a I2C reading).
If the "stand-by out" and "diag. enable" commands are both given through a single programming step, the pulse
takes place first (power stage still in stand-by mode, low, outputs= high impedance).
11/17
11 Page | ||
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| PDF Descargar | [ Datasheet TDA7575.PDF ] | |
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