XRP7613IDBTR-F Datasheet, PDF (1/14 Pages) Exar Corporation – 1.2A 36V Step Down High Brightness LED Driver

XRP7613
1.2A 36V Step Down High Brightness LED Driver
December 2012
GENERAL DESCRIPTION
The XRP7613 is a non-synchronous step down
converter with integrated FET optimized to
drive high power LEDs at up to 1.2A of
continuous current. A wide 7.0V to 36V input
voltage range allows for single supply
operations from industry standard 12V, 18V or
24V power rails.
Based on a hysteretic PFM control scheme, the
XRP7613 can operate at switching frequency
of up to 1MHz and allows for small external
components selection while providing very fast
transient response and achieving excellent
efficiency. The output current is programmable
from 150mA to 1.2A through an external
sense resistor.
Output current dimming is supported through
an analog signal or PWM logic signal at up to
40kHz. A dynamic LED current thermal control
further enhances the reliability of the end
application by linearly reducing the LED
current as temperature raises.
An open LED, LED short circuit, over
temperature and under voltage lock out
protection insures safe operations under
abnormal operating conditions.
The XRP7613 is offered in RoHS compliant,
“green”/halogen free 8-pin Exposed Pad SOIC
package.
Rev. 1.2.0
APPLICATIONS
 General Lighting and Displays
 Architectural and Accent Lighting
 Medical and Industrial Instrumentation
 Video Projectors
FEATURES
 1.2A Continuous Output LED Current
 150mA to 1.2A Programmable Range
 7V to 36V Single Rail Input Voltage
 PWM & Analog Dimming Capability
 Up to 40kHz Frequency
 LED Current Foldback Thermal Control
 Selectable Automatic Linear Dimming of
LED Current with temperature
 Shutdown Control
 Built-in Soft Start
 Open LED, LED Short Circuit and Over
Temperature Protections
 RoHS Compliant “Green”/Halogen Free
8-pin Exposed Pad SOIC Package
TYPICAL APPLICATION DIAGRAM
Fig. 1: XRP7613 Application Diagrams
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. [phone] – Fax. [phone]