ISL78100_15 Datasheet, PDF (1/19 Pages) Intersil Corporation – High Power LED Driver

Data Sheet
High Power LED Driver
The ISL78100 is a high-power LED backlight driver with an
integrated 36V FET designed to drive up to 8 high-power
LEDs in series. The PWM converter runs from an internally
generated 1MHz clock. With efficiencies over 90%, the
regulator provides tight control of LED current and may be
configured in either boost or buck topologies, allowing from
3 to 8 series diodes to be driven from wide input voltages.
LED light level may be controlled either by:
1. LED DC bias current set via the LEVEL pin, or
2. External low frequency PWM control via the
ENABLE/PWM pin.
In both control modes, optional over-temperature thermal
protection of the LED reduces the LED DC bias current
above an adjustable set temperature, protecting the LED
from thermal damage. An optional fault monitor drives an
external FET between the input supply and inductor,
providing short circuit current protection for the LED and
inductor as well as load dump protection for automotive
applications. For low cost applications the pass transistor
may be omitted and the fault pin bypassed.
The ISL78100 is packaged in a 20 Ld 4mmx4mm QFN
package and is specified for operation over the -40°C to
+105°C temperature range.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL78100ARZ
781 00ARZ 20 Ld 4x4 QFN L20.4x4C
ISL78100ARZ-TK* 781 00ARZ 20 Ld 4x4 QFN L20.4x4C
Tape and Reel
ISL78100ARZ-T* 781 00ARZ 20 Ld 4x4 QFN L20.4x4C
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.
December 24, 2013
ISL78100
FN6626.1
Features
• Drives 3 to 8 high-power LEDs in series, up to 32V
• 2.7V to 16V input voltage range
• Boost or Buck configurable switch
• 3A integrated FET
• Automotive load dump protection
• Light output temperature compensation
• LED over-temperature protection
• LED disconnect
• PWM/analog light level control
• Small, 20 Ld 4mmx4mm QFN package
• AEC-Q100 Compliant
• Pb-free (RoHS compliant)
Applications
• Automotive display backlighting
• Automotive LED lighting
Pinout
ISL78100
(20 LD 4X4 QFN)
TOP VIEW
VDC 1
VHI 2
OVP 3
SWD1 4
SWD2 5
THERMAL
PAD
15 ENL
14 MODE
13 EN/PWM
12 SWS1
11 SWS2
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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