SE3505 Datasheet, PDF (1/9 Pages) Seaward Electronics Inc. – 1.9A Fixed Frequency White LED Driver

SE3505
1.9A Fixed Frequency White LED Driver
General Description
Features
The SE3505 is a step-up converter designed  2.5V to 5.5V operating input voltage range
for driving up to 8 series white LEDs for  Drives up to 8 series White LEDs
backlighting application. The SE3505 uses  1.2MHz Fixed Switching Frequency
current mode, 1.2MHZ fixed frequency  Wide range for PWM dimming (200Hz to
architecture to regulate the LED current, which
200KHz)
is set through an external current sense  Internal 1.9A switching current limit
resistor. Its low 300mV feedback voltage  Over Voltage Protection (OVP)
reduces power loss and improves efficiency.  Internal Soft-start Function
The OV pin monitors the output voltage and  Current limit and Thermal shutdown
turns off the converter if an over-voltage
protection
condition is present due to an open circuit  Under voltage Lockout
condition. The SE3505 includes under-voltage  Available in the 6-pin SOT-23 Package
lockout, current limiting and thermal shutdown _Applications
protection preventing damage in the event of

an output overload. The driver is available in

small 6-pin SOT-23 package.

Camera Flash White LED
Mobile Phone, Smart Phone LED Backlight
PDA LED Backlight
 Digital Still Cameras
 Camcorder
Typical Application
(1) 8 series LED application
Rev1.0
Preliminary and all contents are subject to change without prior notice.
© Seaward Electronics, Inc., • www.seawardinc.com • Page 2
9/4/2012