Philips 50PFL4909/F7 - LED Backlight Drive Block Diagram

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
VLED23 ILED24
Q1103
POWER SUPPLY CBA
LCD PANEL ASSEMBLY
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
VIN
Q1203 Q1303
CN1101 CN1101
IC1201 (LED BACKLIGHT DRIVER)
OVP
DRIVELOGIC
ISW
Q1201
3
2 6
LOGIC
14
DRIVE
LDO
FAIL DETECT
13 15 11
IC1301 (LED BACKLIGHT DRIVER)
OVP
DRIVE
LOGIC
ISW
Q1301
3
2 6
LOGIC
14
DRIVE
LDO
FAIL DETECT
13 15 11
VLED31 ILED32
CN1301
PL14.24BLBD