IS31LT3948
IS31LT3948 is PFM MODE BOOST LED DRIVER manufactured by Lumissil.
PFM MODE BOOST LED DRIVER WITH THE EXTERNAL NMOS
February 2015
GENERAL DESCRIPTION
The IS31LT3948 is a PFM step-up DC-DC converter designed for driving the white LED arrays for large size LCD panel backlighting applications. It can deliver stable constant output current from a few milliamps up to 2A, programmed via an external resistor.
The IS31LT3948 utilizes a control scheme in which the output is automatically adjusted to the optimum output voltage for the system, maximizing the efficiency. Furthermore, the control scheme is inherently stable removing the need to provide additional loop pensation.
The device Features external PWM dimming, which allows the flexible...
