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Philips Semiconductors
8.4 Differential audio inputs
9. Limiting values
TDA8920B_2
Product data sheet
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
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.
V
in
Fig 6. Input configuration for mono BTL application
Table 5:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
V
supply voltage
P
I
repetitive peak current in
ORM
output pin
T
storage temperature
stg
T
ambient temperature
amb
T
junction temperature
j
[1]
Overvoltage protection might be activated.
[2]
Current limiting concept. See also
Rev. 02 — 07 November 2005
IN1P
IN1M
IN2P
IN2M
power stage
Conditions
operating
non operating
maximum output
current limiting
Section
13.6.
TDA8920B
2 × 100 W class-D power amplifier
Figure
6.
OUT1
SGND
OUT2
mbl466
Min
Max
±30
-
±32
[1]
-
[2]
8
-
−55
+150
−40
+85
-
150
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Unit
V
V
A
°C
°C
°C
11 of 34
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