ISL97522 Datasheet, PDF (1/20 Pages) Intersil Corporation – 4-Channel TFT-LCD Supply

®
Data Sheet
December 13, 2006
ISL97522
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° 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).
Ordering Information
PART NUMBER
PART
TAPE & PACKAGE PKG.
(Note)
MARKING REEL (Pb-Free) DWG. #
ISL97522IRZ-TK ISL 97522IRZ 13” 38 Ld QFN L38.5x7B
(1k pcs)
ISL97522IRZ-T ISL 97522IRZ 13” 38 Ld QFN L38.5x7B
(4k pcs)
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.
Features
• 4.5V to 13V input
• Boost controller for A_VDD
• Regulated LDOs for V_OFF and V_ON
• Buck controller for logic output
• V_ON slicing circuit
• Fully fault-protected
• Programmable sequence
• 1MHz switching frequency
• 38 Ld QFN package
• Pb-free plus anneal available (RoHS compliant)
Applications
• LCD-TVs (up to 50”+)
• LCD monitors (15”+)
• Industrial/medical LCD displays
Pinout
ISL97522
(38 LD QFN)
TOP VIEW
DRVN 1
DELB 2
FBN 3
VCC1 4
FBB 5
ISADJB 6
ILADJB 7
CINTB 8
DRVB 9
PGNDB 10
VHIB 11
NC 12
THERMAL
PAD
31 FBP
30 VREF
29 ACGND
28 NC
27 DRVP
26 NC
25 VDCP
24 VDC
23 ISADJL
22 CINTL
21 ILADJL
20 PBL
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Copyright Intersil Americas Inc. 2006. All Rights Reserved
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