TDA7575B STMicroelectronics, TDA7575B Datasheet - Page 28

IC AMP DUAL BRIDGE FLEXIWATT27

TDA7575B

Manufacturer Part Number
TDA7575B
Description
IC AMP DUAL BRIDGE FLEXIWATT27
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TDA7575B

Output Type
1-Channel (Mono) or 2-Channel (Stereo)
Max Output Power X Channels @ Load
150W x 1 @ 1 Ohm; 75W x 2 @ 2 Ohm
Voltage - Supply
8 V ~ 18 V
Features
Differential Inputs, I²C, Mute, Short-Circuit and Thermal Protection, Standby
Mounting Type
Through Hole
Package / Case
27-Flexiwatt (bent and staggered leads)
Operational Class
Class-AB
Audio Amplifier Output Configuration
1-Channel Mono/2-Channel Stereo
Output Power (typ)
150x1@1Ohm/75x2@2OhmW
Audio Amplifier Function
Speaker
Input Offset Voltage
45@14.4VmV
Total Harmonic Distortion
0.02@4Ohm@30W%
Single Supply Voltage (typ)
9/12/15V
Dual Supply Voltage (typ)
Not RequiredV
Power Supply Requirement
Single
Power Dissipation
86W
Rail/rail I/o Type
No
Single Supply Voltage (min)
8V
Single Supply Voltage (max)
18V
Dual Supply Voltage (min)
Not RequiredV
Dual Supply Voltage (max)
Not RequiredV
Operating Temp Range
-55C to 150C
Operating Temperature Classification
Military
Mounting
Through Hole
Pin Count
27
Package Type
FLEXIWATT(Vertical)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Diagnostics functional description
7.6
7.7
28/32
Table 10.
S. GND (so) / S. GND (sk) in the above table make a distinction according to which of the 2
outputs is shorted to ground (test-current source side= so, test-current sink side = sk). More
precisely, in both the channels SO = CH+, and SK = CH-.
In permanent diagnostic the table is the same, with only a difference concerning open load
(*), which is not among the recognizable faults. Should an open load be present during the
device's normal working, it would be detected at a subsequent turn-on diagnostic cycle (i.e.
at the successive car radio turn-on).
Faults availability
All the results coming from I
measurements inside a defined period of time. If the fault is stable throughout the whole
period, it will be sent out. This is true for DC diagnostic (turn-on and permanent), for offset
detector.
To guarantee always resident functions, every kind of diagnostic cycles (turn-on, permanent,
offset) will be reactivate after any I
new cycle will be able to start, but the read data will come from the previous diag. cycle (i.e.
The device is in turn-on state, with a short to GND, then the short is removed and micro
reads I
cycle. If another I
to observe a change in diagnostic bytes, two I
I
A correct turn on/off sequence respectful of the diagnostic timings and producing no audible
noises could be as follows (after battery connection):
Car radio installation: DIAG enable (write) --- 20 0ms --- I
disappear).
(repeat I
2
S. Across L.
S. GND (sc)
S. GND (sk)
C programming/reading sequences
Open L.
Turn-on: (Standby OUT + DIAG enable) --- 500 ms (min) --- muting OUT
Turn-off: Muting IN --- 20 ms --- (DIAG disable + standby IN)
S. Vs
2
C. The short to GND is still present in bytes, because it is the result of the previous
2
C reading until high-offset message disappears).
Offset test: device in play (no signal)
Offset enable - 30 ms - I
Double fault table for turn-on diagnostic
S. GND (sc)
2
C reading operation occurs, the bytes do not show the short). In general
S. GND
/
/
/
/
2
C bus, by read operations, are the consequence of
Doc ID 14103 Rev 2
S. GND (sk)
2
2
S. GND
S. GND
C reading operation. So, when the micro reads the I
C reading
/
/
/
2
C reading operations are necessary.
S. Vs + S.
S. Vs
S. Vs
S. Vs
GND
/
/
2
C read (repeat until all faults
S. Across L.
S. Across L.
S. GND
S. GND
S. Vs
/
Open L. (*)
Open L. (*)
Open L.
TDA7575B
S. GND
S. Vs
N.A.
2
C, a

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