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BD6155FVM Communication ICs 1/7 DC/DC converter for LCD back light BD6155FVM BD6155FVM is an ideal IC to drive white LED used for the LCD back light of cellular phones, and PDA etc. This IC incorporates charging pump step-up circuit to drive white LED with high V F . It also integrates a driver to drive white LED with 4-step constant current. Only one external resistor can set the current value. !Applications Small portable appliances, such as cellular phones, PHS, PDA Battery-powered equipments using the white LED. !Features 1) Built-in charging pump step-up circuit. 2) Built-in constant current driver for LED. (Current value : 4 steps variable) 3) Ultra small MSOP8 package. (Height 0.9mm Max.) ! !! !Absolute maximum ratings (Ta=25°C) ParameterSymbolLimitsUnit Pd 350 ∗ mW Power dissipation Maximum supply voltage V BATV −0.3~+6.0 Maximum input voltage −0.3~+6.0 V INV Topr °C Operating temperature −25~+75 Storage temperature Tstg −55~+125°C ∗ Reduce to 3.5mW/°C when Ta=25°C or above. ! !! ! Recommended operating conditions (Ta=25°C) Parameter Power supplyV BAT2.95.5V− SymbolMin.Typ.Max.Unit