Philips 39PFL3708/F8 - Page 30

9-4
4. LED Backlight Drive Block Diagram
IC1101 (LED BACKLIGHT DRIVER)
OVP
DRIVE Q1101
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED11 ILED12
Q1102
POWER SUPPLY CBA
LCD PANEL ASSEMBLY
PROTECT3
BACKLIGHT-ADJ BACKLIGHT-SW
TO SYSTEM CONTROL BLOCK DIAGRAM
P-ON+21V
IC1201 (LED BACKLIGHT DRIVER)
OVP
CN1001
DRIVE
Q1201
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED23 ILED24
Q1202
IC1301 (LED BACKLIGHT DRIVER)
OVP
DRIVE
Q1301
CONTROL LOGIC
1
13
5 6 7
12
DRIVE
VREG
FAIL DETECT
11 17 15
VLED35 ILED36
Q1302
PL13.10LBD