User Manual

MAX8759
6) Ensure the feedback connections are short and
direct. To the extent possible, IFB1, IFB2, VFB, and
ISEC connections should be far away from the high-
voltage traces and the transformer.
7) To the extent possible, high-voltage trace clearance
on the transformer’s secondary should be widely
separated. The high-voltage traces should also be
separated from adjacent ground planes to prevent
lossy capacitive coupling.
8) The traces to the capacitive voltage-divider on the
transformer’s secondary need to be widely separated
to prevent arcing. Moving these traces to opposite
sides of the board can be beneficial in some cases.
Low-Cost, SMBus, CCFL Backlight Controller
30 ______________________________________________________________________________________
Chip Information
TRANSISTOR COUNT: 16,138
PROCESS: BiCMOS
28
27
26
25
24
23
22
8
9
10
11
12
13
14
15161718192021
7654321
MAX8759
*EXPOSED PADDLE
TQFN 5mm x 5mm
TOP VIEW
SDA
BATT
SCL
TFLT
VALS
ALS
PWMI
V
CC
GND
LX2
GH2
BST2
PGND2
GL2
V
DD
GL1 PGND1 BST1 GH1 LX1 ISEC
VFB
IFB2
IFB1
DEL
COMP
FREQ
PWMO
Pin Configuration