DC2788A, LED Lighting Development Tools Int Log Dimming 90W LED driver

Demonstration circuit 2788A is a boost LED driver featuring the LT®3950. This demonstration circuit powers a string of LEDs at 330mA. The step-up topology can be used to drive a string of up to 28V of LEDs as assembled. The maximum output voltage capability of the LT3950 is 60V. DC2788A runs from an input voltage range of 6V to 24V as built. It also runs at 2MHz and has the capability to turn on spread spectrum frequency modulation (SSFM) for a frequency range of 2MHz to 2.5MHz. The UVLO voltage, LED current, output voltage range, switching frequency, brightness control, SSFM and the topology can all be adjusted with simple modifications to the demonstration circuit.