TDF8599B NXP Semiconductors, TDF8599B Datasheet - Page 18

• Manufacturer Part Number: TDF8599B
• Description: The TDF8599B is a dual Bridge-Tied Load (BTL) car audio amplifier comprising anNDMOST-NDMOST output stage based on SOI BCDMOS technology
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDF8599B_1
Product data sheet
8.6.2.1 DC load detection
8.6.2 Load identification (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
used. 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
DC load detection is only available in I
The default setting is logic 0 for bit IB2[D2] which disables DC load detection. DC load
detection is enabled when bit IB2[D2] = 1. Load detection takes place before the class-D
amplifier output stage starts switching in Mute mode and the start-up time from Standby
mode to Mute mode is increased by t
Diagnostic
Power-on reset
UVP or OVP
Clip detection
Temperature pre-warning
OCP/WP
DCP
OTP
Fig 15. Diagnostic output for short circuit conditions
Available data on pins DIAG and CLIP
2
AGND = 0 V
C-bus. Old information is read when a single I
pull up V
Rev. 01 — 29 July 2009
2
C-bus mode only)
50 ms
I
2
C-bus controlled dual channel class-D power amplifier
shorted load
AMPLIFIER
RESTART
50 ms
det(DCload)
2
C-bus mode and is controlled using bit IB2[D2].
50 ms
I
Pin DIAG
yes
yes
no
no
yes
selectable
yes
2
C-bus mode
(see
2
Figure
C-bus read command.
Pin CLIP
yes
no
selectable
selectable
no
no
no
2
short to GND or V
C-bus. The I
2
C-bus latches.
16).
2
C-bus read command is
Figure
RESTART
NO
Non-I
Pin DIAG
yes
yes
no
no
yes
yes
yes
TDF8599B
15.
P
2
C-bus bits are set
line
2
001aai786
© NXP B.V. 2009. All rights reserved.
C-bus mode
Pin CLIP
yes
no
yes
yes
no
no
no
18 of 54