TDA8932B NXP Semiconductors, TDA8932B Datasheet - Page 11

• Manufacturer Part Number: TDA8932B
• Description: The TDA8932B is a high efficiency class-D amplifier with low power dissipation
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TDA8932B_4
Product data sheet
8.5 Diagnostic input and output
8.6 Differential inputs
8.7 Output voltage buffers
Whenever a protection other than TF is triggered, pin DIAG is forced LOW level (see
Table
approximately 2.4 V. This internal reference supply can deliver approximately 50 A.
Pin DIAG refers to pin CGND. The diagnostic output signal during different short
conditions is illustrated in
device into Fault mode.
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
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
When pin POWERUP is set HIGH, the half supply output voltage buffers are switched on
in asymmetrical supply configuration. The start-up will be pop free since the device starts
switching when the capacitor on pin HVPREF and the SE capacitors are completely
charged.
Output voltage buffers:
Fig 6.
Fig 7.
6). An internal reference supply will pull-up the open-drain DIAG output to
Diagnostic output for different short-circuit conditions
Input configuration for mono BTL application
2.4 V
audio
0 V
input
V
o
Rev. 04 — 18 December 2008
Figure
50 ms
shorted load
IN1P
IN1N
IN2P
IN2N
6. Using pin DIAG as input, a voltage < 0.8 V will put the
50 ms
amplifier
restart
2.4 V
0 V
V
o
Section
OUT1
OUT2
14.8).
no restart
supply line
Class-D audio amplifier
short to
001aad760
001aad759
TDA8932B
© NXP B.V. 2008. All rights reserved.
Figure
11 of 48
7.