ROHM Semiconductor BD6142AMUV
This IC is white LED driver IC with PWM step-up DC/DC converter that can boost max 41V and current driver that can drive max 30mA. The wide and precision brightness can be controlled by external PWM pulse.GENERAL DESCRIPTION
This IC has very accurate current drivers, and it has few current errors between each strings. So, it will be helpful to reduce brightness spots on the LCD panel. Small package is suited for saving space.●
FEATURES
High accuracy & good matching current drivers 8ch (MAX30mA/ch) Integrated 50V power Nch MOSFET Soft Start function Drive up to 11 LEDs in series, 8 strings in parallel Rich safety functions●Over-voltage protection
●External SBD open detect / Output Short protection
●Over current limit
●CH Terminal open / GND short protect
●CH over voltage protect / LED short protect
●Thermal shutdown
●UVLO Analog Brightness Control
●Key Specifications Operating power supply voltage range: 4.2V to 27.0V LED maximum current: 30mA (Max.) Quiescent Current: 1.6µA (Typ.) Switching frequency: 1.25MHz(Typ.) Operating temperature range: -40℃ to +85℃
●Package W(Typ.) x D (Typ.) x H(Max.) VQFN024V4040 4.00mm x 4.00mm x 1.00mm VQFN024V4040 Figure 1. Package
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APPLICATIONS
All medium sized LCD equipments, Backlight of Notebook PC, net book, monitor, light, Portable DVD player, light source etc.