General Description
The IS31LT3515 is a current mode PWM controller designed to drive an external MOSFET for high current LED applications. With a current sense amplifier threshold of 250mV, the LED current is programmable with one external current sense resistor. The IS31LT3515 is ideal for buck, boost or buck-boost operation. With 250kHz operating frequency (typical, and this frequency can be set up by external resistor), the external inductor and capacitors can be small while maintaining high efficiency.

FEATUREs
● Wide voltage: Vin up to 40V, Vout up to higer
● Buck, Boost or Buck-Boost operation
● Easy dimming: Analog, PWM or PWM converting to
   analog with an external capacitor
● Output over voltage protection(OVP)
● Internal soft start to avoid inrush current
● Current mode PWM with an 250kHz operating
   frequency(typical, RSET=150Kohms)
● Output short circuit protection
● VIN under voltage lock out and Over temperature
   protection(OTP)

APPLICATIONs
● General industrial high power LED lighting
● Desk lights and room lighting, street lighting
● Display backlight