Philips 55PFL4909 - Page 43

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4. LED Backlight Drive Block Diagram
PL14.26BBLBD
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
Q1103
LCD PANEL ASSEMBLY
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
VIN
Q1203 Q1303
CN1101 CN1201
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
VLED33 ILED34
CN1201
Q1403
IC14101 (LED BACKLIGHT DRIVER)
OVP
DRIVE
LOGIC
ISW
Q1401
3
2 6
LOGIC
14
DRIVE
LDO
FAIL DETECT
13 15 11
VLED41 ILED42
CN1401
POWER SUPPLY CBA