TDA8932T View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
TDA8932T Datasheet PDF : 45 Pages
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NXP Semiconductors
TDA8932
Class-D audio amplifier
In a symmetrical supply the UBP is released when the unbalance of the supply voltage is
within 6 % of its starting value.
Table 6 shows an overview of all protection and the effect on the output signal.
Table 6. Protection overview
Protection
Restart
When fault is removed
OTP
no
OCP
yes
WP
yes
UVP
no
OVP
no
UBP
no
Every 100 ms
yes
no
no
yes
yes
yes
8.5 Diagnostic input and output
Whenever a protection is triggered, except for TF, pin DIAG is activated to LOW level (see
Table 6). An internal reference supply will pull-up the open-drain DIAG output to
approximately 2.4 V. This internal reference supply can deliver approximately 50 µA.
Pin DIAG refers to pin CGND. The diagnostic output signal during different short
conditions is illustrated in Figure 5. Using pin DIAG as input, a voltage < 0.8 V will put the
device into Fault mode.
Vo
2.4 V
Vo
2.4 V
amplifier
restart
0V
0V
≈ 50 ms ≈ 50 ms
shorted load
no restart
short to
supply line
001aad759
Fig 5. Diagnostic output for different short-circuit conditions
8.6 Differential inputs
For a high common-mode rejection ratio and a maximum of flexibility in the application,
the audio inputs are fully differential. By connecting the inputs anti-parallel, the phase of
one of the two channels can be inverted, so that the amplifier can operate as a mono BTL
amplifier. The input configuration for a mono BTL application is illustrated in Figure 6.
In SE configuration it is also recommended to connect the two differential inputs in
anti-phase. This has advantages for the current handling of the power supply at low signal
frequencies and minimizes supply pumping (see also Section 14.8).
TDA8932_2
Preliminary data sheet
Rev. 02 — 12 December 2006
© NXP B.V. 2006. All rights reserved.
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