TDA8595 NXP Semiconductors, TDA8595 Datasheet - Page 16

• Manufacturer Part Number: TDA8595
• Description: The TDA8595 is a complementary quad Bridge Tied Load (BTL) audio power amplifiermade in BCDMOS technology
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8595_2
Product data sheet
7.13 Diagnostics
Diagnostic information can be read via the I
DIAG pin or on the STB pin. The DIAG pin has both fixed information (power-on reset
occurred, low battery and high battery) and, via the I
(temperature, load fault and clip). This information will be seen at the DIAG pin as a logic
OR. In case of a failure, the DIAG pin remains LOW and the microprocessor can read the
failure information via the I
to minimize I
To have full control over the clipping information, the STB pin can be programmed as a
second clip detection pin. The clip detection level can be selected for all channels at once.
It is possible to select whether the clip information is available on the DIAG pin or on the
STB pin, for each channel separately. It is, for instance, possible to distinguish between
clipping of the front and the rear channels.
Diagnostic information selection possibilities are shown in
Table 4.
Diagnostic
information
Power-On Reset
(POR)
Low battery
Clip detection
Temperature pre-
warning
Short
Fig 11. Temperature controlled amplifier gain
(dB)
G
v
30
20
10
0
145
Diagnostic information availability
2
C-bus traffic). When the failure is removed, the DIAG pin will be released.
Rev. 02 — 21 November 2007
I
DIAG pin
after power-on reset,
DIAG pin will remain
LOW until amplifier has
been started
yes
can be enabled per
channel
can be enabled
can be enabled
2
C-bus mode
2
C-bus (the DIAG pin can be used as microprocessor interrupt
155
I
2
2
C-bus controlled 4
C-bus, and can also be available on the
STB pin
no
no
can be enabled per
channel
no
no
2
C-bus, selectable information
165
Table
T
4.
j
( C)
45 W power amplifier
Legacy mode
DIAG pin
no
yes
yes, fixed level for all
channels on 2 %
yes, pre-warning level
is 145 C
yes
TDA8595
001aad174
© NXP B.V. 2007. All rights reserved.
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