TDA7575B STMicroelectronics, TDA7575B Datasheet - Page 23

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

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

TDA7575B
7
7.1
Diagnostics functional description
Turn-on diagnostic
It is activated at the turn-on (stand-by out) under I
To verify if any of the above misconnections are in place, a subsonic (inaudible) current
pulse
Turn On diagnostic status is internally stored until a successive diagnostic pulse is
requested (after a I
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).
Afterwards, when the Amplifier is biased, the PERMANENT diagnostic takes place. The
previous Turn On state is kept until a short appears at the outputs.
Figure 29. Turn-on diagnostic: working principle
Fig.
out) with and without Turn-on diagnostic.
Figure 30. SVR and output behavior - case 1: without turn-on diagnostic
Figure 30
–
–
–
–
(Figure
Short to GND
Short TO Vs
Short across the speaker
Open speaker
29) is internally generated, sent through the speaker(s) and sunk back. The
and
I2CB DATA
Isource
Vsvr
Out
Figure 31
2
Isink
C reading).
Bias (power amp turn-on)
Vs~5V
CH+
CH-
show SVR and OUTPUT waveforms at the turn-on (stand-by
Doc ID 14103 Rev 2
Isource
Diagnostic Enable
I (mA)
(Permanent)
Isink
2
Permanent Diagnostics data (output)
acquisition time (100mS Typ)
C bus request. Detectable output faults are:
FAULT
event
Permanent diagnostic
Measure time
permitted time
~100mS
Diagnostics functional description
Read Data
t (ms)
t
23/32