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ISL97522 Datasheet

  • ISL97522

  • 4-Channel TFT-LCD Supply

  • Intersil   Intersil

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廬
ISL97522
Data Sheet
December 13, 2006
FN7445.0
4-Channel TFT-LCD Supply
The ISL97522 represents a 4-channel supply control IC for
use in large panel TFT-LCD displays. Supporting inputs from
4.5V to 13V, the ISL97522 includes a boost controller to
achieve the required A
VDD
output voltage. Both V
ON
and
V
OFF
are generated using off-chip charge-pumps which are
then post regulated using on-board LDO controllers.
The logic supply is generated using an internal non-
synchronous buck controller. This controller runs at 180擄 out
of phase with the A
VDD
supply to minimize input noise.
The A
VDD
, V
OFF
, and V
ON
outputs are automatically
sequenced as A
VDD
, V
OFF
, and V
ON
. By using an optional
external series transistor with A
VDD
(Q1), the start-up
sequence can be adjusted to VOFF, A
VDD
and then V
ON
. A
V
ON
slicing circuit is also included to reduce LCD flicker.
The ISL97522 also incorporates a fault protection circuit that
can disable the IC and turn off all outputs when an output
short is detected. (Note that to protect A
VDD
a single
external transistor is required).
Features
鈥?4.5V to 13V input
鈥?Boost controller for A
VDD
鈥?Regulated LDOs for V
OFF
and V
ON
鈥?Buck controller for logic output
鈥?V
ON
slicing circuit
鈥?Fully fault-protected
鈥?Programmable sequence
鈥?1MHz switching frequency
鈥?38 Ld QFN package
鈥?Pb-free plus anneal available (RoHS compliant)
Applications
鈥?LCD-TVs (up to 50鈥?)
鈥?LCD monitors (15鈥?)
鈥?Industrial/medical LCD displays
Ordering Information
PART NUMBER
(Note)
PART
MARKING
TAPE & PACKAGE
REEL (Pb-Free)
PKG.
DWG. #
Pinout
ISL97522
(38 LD QFN)
TOP VIEW
33 CDLY
32 VCC2
31 FBP
30 VREF
29 ACGND
28 NC
27 DRVP
THERMAL
PAD
26 NC
25 VDCP
24 VDC
23 ISADJL
22 CINTL
21 ILADJL
20 PBL
ISINB 13
VIN 14
EN 15
VHIL 16
LX 17
DRVL 18
PGNDP 19
37 COM
36 DRN
38 SRC
35 ENL
34 CTL
ISL97522IRZ-TK ISL 97522IRZ
ISL97522IRZ-T
ISL 97522IRZ
13鈥?/div>
38 Ld QFN L38.5x7B
(1k pcs)
13鈥?/div>
38 Ld QFN L38.5x7B
(4k pcs)
DRVN 1
DELB 2
FBN 3
VCC1 4
FBB 5
ISADJB 6
ILADJB 7
CINTB 8
DRVB 9
PGNDB 10
VHIB 11
NC 12
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are RoHS compliant and
compatible with both SnPb and Pb-free soldering operations. Intersil
Pb-free products are MSL classified at Pb-free peak reflow
temperatures that meet or exceed the Pb-free requirements of
IPC/JEDEC J STD-020.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

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