TDA8596 NXP Semiconductors, TDA8596 Datasheet - Page 19

• Manufacturer Part Number: TDA8596
• Description: The TDA8596 is a quad Bridge Tied Load (BTL) audio power amplifier with symmetricalinputs, made in BCDMOS technology
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8596_2
Product data sheet
7.15 I
Example: at an AC output voltage of 2 V peak the total impedance must be less than 4
to detect an AC coupled load or above 9
to
Table 6.
The AC load detection can only be performed when the amplifier has completed its
start-up sequence. Consequently it will not conflict with the DC load detection.
The diagnostic information of the amplifier can be read out via the I
data bits are set in case a failure event occurs and are not reset until an I
command is given. This implies that even when the failure mode is removed before
reading out the I
has occurred. A consequence of this procedure is that during the I
information is read. When actual information is required, it is recommended to perform
two successive read actions.
The DIAG pin will give actual diagnostic information (when selected), however it does not
distinguish between the various failure modes. The DIAG pin can be used to trigger an
I
no longer present, the DIAG pin will be released instantly, independently of the I
latches.
Normal DC load bit
DBx[D5]
Don’t care
Don’t care
2
2
Fig 13. AC load impedance versus output signal
C-bus read out of the data bits to retrieve actual diagnostic information. When a failure is
C-bus diagnostic bits read out
Table 6
(1) I
(2) I
|Z
th(load)
( )
oM
oM
20
16
12
for the interpretation AC load detection bits.
8
4
0
AC load detection translation table
|
< 230 mA (no load detection level).
> 460 mA (load detection level).
0
2
I
2
C-bus, the microcontroller will still be able to read out what kind of failure
C-bus controlled 4
Rev. 02 — 8 November 2007
1
Line driver DC load bit
DBx[D4]
0
1
2
45 W power amplifier with symmetrical inputs
to guarantee the detection of a DC load. Refer
(1)
(2)
3
Load indication
no AC load detected
AC load detected
4
2
2
C-bus read cycle old
C-bus. The I
V
oM
TDA8596
001aad177
© NXP B.V. 2007. All rights reserved.
(V)
2
C-bus read
5
2
2
C-bus
C-bus
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