MAX8729EEI+T Maxim Integrated Products, MAX8729EEI+T Datasheet - Page 25

• Manufacturer Part Number: MAX8729EEI+T
• Description: Display Drivers Constant-Frequency H alf-Bridge CCFL Inve
• Manufacturer: Maxim Integrated Products

Specifications of MAX8729EEI+T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3) Route high-speed switching nodes away from sen-
4) Mount the decoupling capacitor from V
5) The current-sense paths for LX to GND and IN to LX
6) Ensure the feedback connections are short and
7) To the extent possible, high-voltage trace clearance
8) The traces to the capacitive voltage-divider on the
sitive analog areas (V
TFLT). Make all pin-strap control input connections
to analog ground or V
or V
as close as possible to the IC with dedicated traces
that are not shared with other signal paths.
must be made using Kelvin-sense connections to
guarantee the current-limit accuracy. With 8-pin SO
MOSFETs, this is best done by routing power to the
MOSFETs from the outside using the top copper
layer, while connecting GND and LX inside (under-
neath) the 8-pin SO package.
direct. To the extent possible, IFB, VFB, and ISEC
connections should be far away from the high-volt-
age traces and the transformer.
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.
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.
DD
.
______________________________________________________________________________________
Constant-Frequency, Half-Bridge CCFL
CC
CC
rather than power ground
, COMP, HF, LF, and
CC
to GND
TRANSISTOR COUNT: 7531
PROCESS: BiCMOS
TOP VIEW
Inverter Controller
PCOMP
HSYNC
DPWM
SHDN
CNTL
PSCK
HFCK
LFCK
TFLT
GND
SEL
V
CC
LF
IN
10
11
12
13
14
1
2
3
4
5
6
7
8
9
MAX8729
QSOP
Pin Configuration
Chip Information
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
GL
PGND
BST
GH
LX
PS1
LSYNC
ISEC
VFB
IFB
COMP
PS2
HF
DD
25