TDA8926 Datasheet, PDF (7/32 Pages) NXP Semiconductors – Power stage 2 x 50 W class-D audio amplifier

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VSSA VDDA
VDDD
VDDA
VSS1 VDD1
VDD2 VDD1
1
3
IN1− 4
TDA8929T
R _fb
Vi(1)
IN1+ 5
INPUT
STAGE
PWM
MODULATOR
SGND1 2
mute
VSSA
SGND
ROSC _{OSC 7}
OSCILLATOR
STABI
MANAGER
VMODE
MODE 6
MODE
SGND
20 PWM1
TDA8926J
13 5
6
BOOT1
23 REL1
24 SW1
21 EN1
19 STAB
22 _DIAGCUR
15 _DIAGTMP
REL1 2
SW1 1
EN1 ⁴
CONTROL
AND
HANDSHAKE
STAB 9
DRIVER
HIGH
DRIVER
LOW
DIAG 3
TEMPERATURE SENSOR
AND
CURRENT PROTECTION
POWERUP 15
7
OUT1
VSS1
VDD2
12 ^BOOT2
Vi(2)
SGND2 11
IN2+ 8
IN2− 9
mute
INPUT
STAGE
PWM
MODULATOR
16 EN2
13 SW2
14 REL2
17 PWM2
EN2 14
SW2 ¹⁷
CONTROL
AND
REL2 ^{16 HANDSHAKE}
DRIVER
HIGH
DRIVER
LOW
11 ^OUT2
12 10
R _fb
18
8
10
VSS2(sub)
VDD2
VSSD
VSS1 VSS2
VSSA VDDA
VSSD
VSSA
+25 V
SGND
(0 V)
−25 V
MGU387
Fig.3 Typical application schematic of the class-D system using controller TDA8929T and the TDA8926J.