Philips Semiconductors
Power stage 2 × 50 W class-D audio
ampliï¬er
Preliminary speciï¬cation
TDA8926
8.3 BTL operation
BTL operation can be achieved by driving the audio input
channels of the controller in the opposite phase and by
connecting the loudspeaker with a BTL output filter
between the two outputs (pins OUT1 and OUT2) of the
power stage (see Fig.4).
In this way the system operates as a mono BTL amplifier
and with the same loudspeaker impedance a four times
higher output power can be obtained.
For more information see Chapter 15.
handbook, full pagewidth
VDD2 VDD1
TDA8926J
13 5
6
BOOT1
EN1
SW1
REL1
STAB
DIAG
POWERUP
EN2
SW2
REL2
4
1
CONTROL
AND
2
HANDSHAKE
9
DRIVER
HIGH
DRIVER
LOW
temp
3
TEMPERATURE SENSOR
current
AND
CURRENT PROTECTION
15
7 OUT1
VSS1
VDD2
12
SGND
(0 V)
BOOT2
14
17
CONTROL
AND
16
HANDSHAKE
DRIVER
HIGH
DRIVER
LOW
11 OUT2
8
10
VSS1 VSS2
MGU385
Fig.4 Mono BTL application.
2002 Oct 10
8