Description
This device provides all the necessary control functions to provide the power rails for driving a vacuum fluorescent display (VFD) using minimal external components. The power supply is based on a quasi-resonant, discontinuous flyback converter, operating near the critical conduction boundary. A novel adaptive turn-on control scheme is used to optimize the turn-on and turn-off phase of the MOSFET, to reduce EMI emissions while minimizing switching losses.

FEATUREs and Benefits
▪Multiple output regulator
▪7 to 40 V input supply
▪Low EMI conducted and radiated emissions
▪Adaptive quasi-resonant turn on/off control
▪Minimal number of external components
▪Enable input which can be driven with respect to the battery voltage