BD6155FVM Datasheet, PDF (1/8 Pages) Rohm – DC/DC converter for LCD back light

Communication ICs
BD6155FVM
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 VF. 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)
Parameter
Symbol
Limits
Unit
Maximum supply voltage
VBAT
−0.3~+6.0
V
Maximum input voltage
VIN
−0.3~+6.0
V
Power dissipation
Pd
350 ^∗
mW
Operating temperature
Topr
−25~+75
°C
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 supply
Symbol Min.
Typ.
Max.
Unit
VBAT
2.9
−
5.5
V
1/7