Rohm Productdetail
White LED Driver with Synchronous Boost Converter and PWM Brightness Control for up to 4 LEDs in Series - BD6072HFN
Switching Regulator type LED Driver Series for small LCD backlight are boost DC/DC converters possible to drive the white LEDs at constant. It is possible that turning on white LED steadily by a series connection which has no current variation, and by a fast transient response with current mode. With synchronous rectification (no external schottky diode required) and small package, they can save mount space.
Specifications:
Topology
Boost
Number of Outputs
1
Vin(Min.)[V]
2.7
Vin(Max.)[V]
5.5
Output Current(Max.)[mA]
35.0
Per Channel Drive(Max.)[mA]
35.0
Switch Current Limit(Typ.)[A]
0.35
Vout(Max.)[V]
18.0
Frequency(Max.)[MHz]
1.0
LED Configuration
4
LDO
No
Auto Luminous Control
No
Synchronous
Yes
Integrated FET
Yes
Dimming
PWM / Analog
Peak Efficiency[%]
86
Iq(Typ.)[mA]
1.1
Ishutdown(Typ.)[µA]
0.1
Operating Temperature (Min.)[°C]
-30
Operating Temperature (Max.)[°C]
85
Features:
・Boost DC/DC converter・Adjustment of brightness by external PWM pulse
・Possible to driving 4 LEDs
・Soft start function
・Synchronous rectification Boost DC/DC converter
・No external schottky diode required
・Output Open • Short protect