TDA8920B
Philips Semiconductors
2 × 100 W class-D power amplifier
[2] Only complete shut-down of amplifier if short-circuit impedance is below threshold of 1 Ω. In all other cases
current limiting: resulting in clipping output signal.
[3] Fault condition detected during (every) transition between standby-to-mute and during restart after
activation of OCP (short to one of the supply lines).
8.4 Differential audio 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 channels can be inverted, so that a load can be connected between the two output
filters. In this case the system operates as a mono BTL amplifier and with the same
loudspeaker impedance an approximately four times higher output power can be
obtained.
The input configuration for a mono BTL application is illustrated in Figure 6.
In the stereo single-ended 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.
OUT1
IN1P
IN1M
V
SGND
in
IN2P
IN2M
OUT2
power stage
mbl466
Fig 6. Input configuration for mono BTL application.
9. Limiting values
Table 5:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
VP
Parameter
Conditions
Min
Max
±30
-
Unit
V
supply voltage
-
[1]
IORM
repetitive peak current in
output pin
maximum output
current limiting
8
A
Tstg
Tamb
Tj
storage temperature
ambient temperature
junction temperature
−55
−40
-
+150
+85
°C
°C
°C
150
[1] Current limiting concept. See also Section 13.6.
9397 750 13356
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Preliminary data sheet
Rev. 01 — 1 October 2004
11 of 34
NXP [ NXP ]
