The SE3505 is a step-up converter designed
for driving up to 8 series white LEDs for
backlighting application. The SE3505 uses
current
mode，1.2MHz fixed frequency
architecture to regulate the L .ED current, which
is set through an external current sense
resistor. Its low 300mV feedback voltage
reduces power loss and improves efficiency.
The OV pin monitors the output voltage and
tums off the converter if an over-voltage
condition is present due to an open circuit
condition. The SE3505 includes under-voltage
lockout, current limiting and thermal shutdown
protection preventing damage in the event of
an output overload. The driver is available in
small 6-pin SOT-23 package.
2.5V to 5.5V operating input voltage range
Drives up to 8 series White LEDs
1.2MHz Fixed Switching Frequency
Wide range for PWM dimming (200Hz to
200KHz)
Internal 1.9A switching current limit
Over Voltage Protection (OVP)
Internal Soft-start Function
Current limit and Thermal shutdown
protection
Under voltage Lockout
Available in the 6-pin SOT-23 Package
应用
Camera Flash White LED
Mobile Phone, Smart Phone LED Backlight
PDA LED Backlight
Digital Still Cameras
Camcorder