Preliminary Datasheet EL7801 (Intersil)

EL7801
®
PRELIMINARY Data Sheet December 22, 2005 FN7354.0 High Power LED Driver Features
The EL7801 is a high-power LED backlight driver with an • Drives 1-8 high-power LEDs in series, up to 32V integrated 36V FET designed to drive up to 8 high-power • 2.7V to 16V input voltage range LEDs in series while running from a 12V input supply. The PWM converter runs from an internally generated 1MHz • Boost or buck configurable switch clock. With efficiencies over 90% the regulator provides tight • 3A integrated FET control of LED current and may be configured in either boost or buck topologies, allowing from 1 to 8 series diodes to be • Automotive load dump protection driven from a 12V input. • Light output temperature compensation LED light level may be controlled either by: • LED over-temperature protection 1. LED DC bias current set via the LEVEL pin, or • LED disconnect 2. External low frequency PWM control via the • PWM/analog light level control ENABLE/PWM pin. • Small, 20 Ld QFN package In both control modes optional over temperature thermal protection of the LED reduces the LED DC bias current • LED camera flash mode above a customer set temperature, protecting the LED from • Pb-free plus anneal available (RoHS compliant) thermal damage. An optional fault monitor drives an external FET between the input supply and inductor, providing short
Applications
circuit current protection for the LED and inductor as well as load dump protection for automotive applications. For low • Display backlighting cost applications the pass transistor may be omitted and the - Automotive fault pin bypassed. - LCD monitor - Notebook displays The EL7801 is packaged in a 20 Ld QFN package and is specified for operation over the -40°C to +85°C temperature • LED accent lighting range. • Automotive lighting
Ordering Information Pinout PART EL7801 NUMBER TAPE & REEL PACKAGE PKG. DWG. # (20 LD QFN)
TOP VIEW EL7801ILZ - 20 Ld QFN MDP0046 EL7801ILZ-T7 7” 20 Ld QFN MDP0046
N ULT VI FA GND NC VBAT
EL7801ILZ-T13 13” 20 Ld QFN MDP0046
20 19 18 17 16
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
VDC 1 15 ENL
material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and
VHI 2 14 MODE
compatible with both SnPb and Pb-free soldering operations. Intersil
VOUT 3 THERMAL 13 EN/PWM
Pb-free products are MSL classified at Pb-free peak reflow
PAD
temperatures that meet or exceed the Pb-free requirements of
SWD1 4 12 SWS1
IPC/JEDEC J STD-020.
SWD2 5 11 SWS2 6 7 8 9 10 FB LEVEL TEMP TMAX BOOST/BUCKN
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. 2002-2005. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.