Datasheet Renesas ISL97801AR — Ficha de datos

DATASHEET
NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL97634 ISL97801
High Power LED Driver FN6428
Rev 1.00
April 2, 2007 The ISL97801 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. Features LED light level may be controlled either by: • Automotive load dump protection • Drives 3-8 high-power LEDs in series, up to 32V
• 2.7V to 16V input voltage range
• Boost or Buck configurable switch
• 3A integrated FET 1. LED DC bias current set via the LEVEL pin, or • Light output temperature compensation 2. External low frequency PWM control via the
ENABLE/PWM pin. • LED over-temperature protection 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 …