TDA8927 Philips Semiconductors, TDA8927 Datasheet - Page 10

• Manufacturer Part Number: TDA8927
• Description: Power stage 2 x 80 W class-D audio amplifier
• Manufacturer: Philips Semiconductors

Philips Semiconductors
8.3
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 PWM output pins of the power stage
(see Fig.6).
2001 Dec 11
handbook, full pagewidth
Power stage 2
audio amplifier
BTL operation
POWERUP
80 W class-D
DIAG
STAB
REL1
REL2
SW1
SW2
EN1
EN2
15
14
17
16
1
4
2
9
3
current
temp
HANDSHAKE
HANDSHAKE
TDA8927J
CONTROL
CONTROL
Fig.6 Mono BTL application.
AND
AND
TEMPERATURE SENSOR
CURRENT PROTECTION
AND
DRIVER
DRIVER
DRIVER
DRIVER
10
HIGH
HIGH
LOW
LOW
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.
V DD2 V DD1
V SS1 V SS2
13
8
V DD2
V SS1
5
10
12
11
6
7
OUT1
OUT2
MGU386
BOOT1
BOOT2
SGND
(0 V)
Objective specification
TDA8927