System Block Diagram - LG LF-U850D Service Manual

• TAS5142

SYSTEM BLOCK DIAGRAM

System
Microcontroller
TAS5508
VALID
Left-
Channel
Output
Right-
Channel
Output
Hardwire
Mode
Control
PVDD
32 V
System
Power
Supply
GND
GND
GVDD (12 V)/VDD (12 V)
12 V
VAC
OTW
SD
RESET_AB
RESET_CD
PWM_A
Input
H-Bridge 1
PWM_B
PWM_C
Input
H-Bridge 2
PWM_D
M1
M2
M3
4 4
PVDD
Power
Supply
Decoupling
Output
H-Bridge 1
2-Channel
H-Bridge
BTL Mode
Output
H-Bridge 2
4
GVDD
VDD
Hardwire
VREG
OC Limit
Power Supply
Decoupling
- 2-10 -
BST_A
Bootstrap
Caps
BST_B
OUT_A
nd
2 -Order L-C
Output Filter
for Each
OUT_B
Half-Bridge
OUT_C
nd
2 -Order L-C
Output Filter
for Each
OUT_D
Half-Bridge
BST_C
Bootstrap
Caps
BST_D