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ISL97636A
Data Sheet
May 9, 2008
FN6566.0
6-Channel LED Driver
The ISL97636A is an integrated power LED driver that
controls 6 channels of LED current for LCD backlight
applications. The ISL97636A is capable of driving typically
54 (6x9) pieces of 3.5V/30mA or 60 (6x10) pieces of
3.2V/20mA LEDs. The ISL97636A’s contains 6 channels of
voltage controlled current sources with typical currents
matching of ±1%, which compensate for the non-uniformity
effect of forward voltages variance in the LED stacks. To
minimize the voltage headroom and power loss in the typical
multi-strings operation, the ISL97636A features a dynamic
headroom control that monitors the highest LED forward
voltage string and uses its feedback signal for output
regulation.
The LED brightness can be pulse width modulated with an
applied PWM signal from DC to audio noise free 20kHz.
The ISL97636A features extensive protection functions that
include string open and short circuit detections, OVP, OTP,
thermal shutdown and an optional input overcurrent
protection with master fault disconnect switch.
Available in the 24 Ld 4mmx4mm QFN, the ISL97636A
operates from -40°C to +85°C with input voltage ranges from
6V to 24V for high LEDs count applications.
Ordering Information
PART
Features
? 6 channels
? 6V to 24V Input
? 34.5V Output Max
? Drive Maximally 54 (3.5V/30mA each) or 60 (3.2V/20mA
each) LEDs
? Current Matching ±1% Typ
? Dynamic Headroom Control
? PWM Signal up to 20kHz Dimming
? Protections
- String Open Circuit Detection
- String Short Circuit Detection with Selectable Thresholds
- Over-Temperature Protection
- Overvoltage Protection
- Optional Input Overcurrent Protection w/Disconnect SW
? 1.2MHz Switching Frequency
? 24 Ld 4mmx4mm QFN Package
? Pb-Free (RoHS compliant)
Applications
? Notebook Displays LED Backlighting
? LCD Monitor LED Backlighting
NUMBER
(Note)
ISL97636AIRZ*
PART
MARKING
976 36AIRZ
PACKAGE
(Pb-free)
24 Ld 4x4 QFN
PKG.
DWG. #
L24.4x4D
? Automotive Displays LED Backlighting
? Automotive or Traffic Lighting
*Add “-T” or “-TK” suffix for tape and reel. Please refer to TB347 for
details on reel specifications
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets; molding compounds/die attach
materials and 100% matte tin plate PLUS ANNEAL - e3 termination
finish, which is 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. 2008. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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