Philips 40PFL4609/F8 - Page 42

9-4
4. LED Backlight Drive Block Diagram
IC1101 (LED BACKLIGHT DRIVER)
OVP
DRIVE
LOGIC
ISW
Q1101
3
2 6
LOGIC
14
DRIVE
LDO
FAIL DETECT
13 15 11
VLED11 ILED12
VLED21 ILED22
Q1102
POWER SUPPLY CBA
LCD PANEL ASSEMBLY
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
P-ON+21V
CN1101 CN1201
IC1201 (LED BACKLIGHT DRIVER)
OVP
DRIVELOGIC
ISW
Q1201
3
2 6 LOGIC
14
DRIVE
LDO
FAIL DETECT
13 15 11
Q1202
Q1103 Q1203
PL14.32BLBD