TDA8926 Datasheet, PDF (8/32 Pages) NXP Semiconductors – Power stage 2 x 50 W class-D audio amplifier

Philips Semiconductors
Power stage 2 × 50 W class-D audio
amplifier
Preliminary specification
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