TDF8599 NXP Semiconductors, TDF8599 Datasheet - Page 18

• Manufacturer Part Number: TDF8599
• Description: I2C-bus controlled dual channel 43 W/2 W single channel 85 W/1 W class-D power amplifier
• Manufacturer: NXP Semiconductors

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NXP Semiconductors
TDF8599_1
Product data sheet
8.6.1 Diagnostic table
8.6 Diagnostic output
The diagnostic information for I
The instruction bitmap and data bytes are described in
Pins DIAG and CLIP have an open-drain output which must have an external pull-up
resistor connected to an external voltage. Pins CLIP and DIAG can show both fixed and
I
Pin DIAG goes LOW when a short circuit to one of the amplifier outputs occurs. The
microprocessor reads the failure information using the I
for a short circuit. These bits can be reset with the I
Even after the short has been removed, the microprocessor knows what was wrong after
reading the I
information is read. To read the current information, two read commands must be sent,
one-after-another.
When selected, pin DIAG gives the current diagnostic information. Pin DIAG is released
instantly when the failure is removed, independent of the I
Table 11.
When OCP is triggered, the open-drain DIAG output is activated. The diagnostic output
signal during different short circuit conditions is illustrated in
Diagnostic
Power-on reset
UVP or OVP
Clip detection
Temperature pre-warning
OCP
DCP
OTP
2
Fig 16. Diagnostic output for short circuit conditions
C-bus selectable information.
Available data at DIAG and CLIP pin
2
AGND = 0 V
C-bus. In principle, during a single I
pull up V
Rev. 01 — 13 November 2008
50 ms
2
C-bus mode and non-I
shorted load
AMPLIFIER
RESTART
50 ms
Class-D power amplifier with load diagnostics
50 ms
I
DIAG
yes
yes
no
no
yes
selectable
yes
2
C-bus mode
2
C-bus read command, the old
2
C-bus read command.
CLIP
no
no
selectable
selectable
no
no
no
2
C-bus mode is shown in
Table 14
2
short to GND or VP line
C-bus. The I
2
C-bus latches.
Figure
RESTART
NO
and
Non-I
DIAG
yes
yes
no
no
yes
yes
yes
16.
2
Table
C-bus bits are set
2
001aai786
TDF8599
© NXP B.V. 2008. All rights reserved.
C-bus mode
15.
CLIP
no
no
yes
yes
no
no
no
Table
18 of 52
11.