XRP7613IDBTR-F Datasheet, PDF (11/14 Pages) Exar Corporation – 1.2A 36V Step Down High Brightness LED Driver

XRP7613
1.2A 36V Step Down High Brightness LED Driver
LAYOUT CONSIDERATION
For proper operations of XRP7613, the
following guidelines should be followed.
1.The input capacitor should be placed as
close as possible to the V_IN pin in order to
reduce the input voltage ripple and noise.
2.The inductor, internal power switch,
Schottky diode, output capacitor and the LEDs
should be kept as close as possible.
3.PCB traces with large current should be kept
short and wide.
TYPICAL APPLICATION CIRCUITS
5.Effect from noise can be reduced by placing
the XRP7613 GND pin as close as possible to
the ground pin of the input bypass capacitor.
6.The ISEN pin and VIN pin should be
connected to the sense resistor directly.
Traces should be routed away from any
potential sources.
7.The VREF pin and TH pin should be
connected to the LED thermal sense resistors
directly. Traces should be routed away from
any potential sources.
Fig. 22: Typical Application Diagram
© 2012 Exar Corporation
11/13
Rev. 1.2.0