Philips 220B4LPCS/00 - Power Board Block Diagram

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Meridian 3
16
5.2 Power Board
EMI Filte
r
Circuit
Input AC Source
Inrush Prevention
Rectification
Main Transforme
r
Switching Circuit ( PWM Control IC & MOSFET )
Rectification
Feedbac
k
Control Circuit
B+
Diode Rectifie
r
and Filter Circuit
Output (+5V) To Main board /Audio *2
W
Fuse For OLP
Diode Rectifie
r
and Filter Circuit
Output (+16V) To USB(Option) Circui
t
Diode Rectifie
r
and Filter Circuit
PWM Control Circuit CONVERTER LD7750RGR
Driver Circuit ( Full Bridge )
LED Panel
A
bnormal Protect
Control Circuit
Feedback Control Circuit
Dimming Control Circuit
ON / OFF Control Signa
l
( 16v: on / 0v:off )
Dimming Control Signa
l
(Burst model Signal )
A
dapter Block Circuit
Converter Block Circuit