Philips 43PFL4901/F7 - Page 37

9-4
4. LED Backlight Drive Block Diagram
DRIVE
LOGIC
ISW
Q1101
3
2 6
LOGIC
14
DRIVE
LDO
13 15 11
VLED11 ILED12
VLED21 ILED22
Q1102
P-ON+21V
CN1101
CN1201
DRIVELOGIC
ISW
Q1201
3
2 6 LOGIC
14
DRIVE
LDO
13 15 11
Q1202
IC1101 (LED BACKLIGHT DRIVER)
POWER SUPPLY CBA
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
IC1201 (LED BACKLIGHT DRIVER)
OVP
FAIL DETECT
OVP
FAIL DETECT
LCD PANEL ASSEMBLY
PL15.13BLBD