DatasheeDatasheett Constant Current LED Driver with 64 Dimming Steps f or up to 4 LEDs BD1754HFN General Description Key Specification BD1754HFN is a multi-level brightness control LED Operating Power Supply Voltage Range: Driver that works as a constant current driver with 64 2.7V to 5.5V steps, so that the driving current can be adjusted finely. Quiescent Current: 0.1A (Typ) BD1754HFN is best suited to turn ON LEDs that require Operating Temperature Range: -30C to +85 C high-accuracy LED brightness control. Package W(Typ) x D(Typ) x H(Max) Features Current Regulation for up to 4 Parallel LEDs Adjustable Constant Current with 64 Steps High Accuracy and Good Matching of each Current Channel (0.5% Typ) Brightness Control Via Single-Line Digital Control Interface (Uni-Port Interface Control = UPIC) Applications This driver can be used in various applications such as mobile phones, portable game consoles and etc. HSON8 2.90mm x 3.00mm x 0.60mm Typical Application Circuit Power Supply L1 L2 L3 L4 IN C 0.1F IN EN BD1754HFN ISET R ISET 120k GND (When I -max =32mA) LED Product structureSilicon monolithic integrated circuit This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0G3G0C200060-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/17 TSZ2211114001 10.Dec.2015 Rev.002 Datasheet BD1754HFN Absolute Maximum Ratings (Ta = 25C) Parameter Symbol Rating Unit Maximum Applied Voltage V 7 V MAX (Note 1) Power Dissipation Pd 0.63 W Operating Temperature Range Topr -30 to +85 C Storage Temperature Range Tstg -55 to +150 C (Note 1) When mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). Derate by 5.04 mW/C for Ta higher than 25 C. Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit between pins. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over the absolute maximum ratings. Recommended Operating Conditions (Ta = -30C to +85C) Rating Parameter Symbol Unit Conditions Min Typ Max Operating Power Supply Voltage V 2.7 3.6 5.5 V IN Driver Pin Voltage Range VDRV 0.2 - VIN-1.4 V When Current driver power ON. Electrical Characteristics (Unless otherwise specified, Ta = 25C and VIN = 3.6V) Limit Parameter Symbol Unit Conditions Min Typ Max Quiescent Current IQ - 0.1 1 A VEN=0V Circuit Current I - 1.2 2.0 mA Except LED current DD Current Driver Maximum Current I 29.76 32.0 34.24 mA R = 120k LED-MAX ISET When current 16.5 mA setting LED Current Accuracy ILED-diff - - 7.0 % R = 120k ISET When current 16.5 mA setting (Note 1) LED Current Matching ILED-match - 0.5 3.0 % RISET = 120k Logic Controller Low Threshold Voltage VIL - - 0.4 V High Threshold Voltage VIH 1.4 - - V H Level Input Current I - 0 2 A V =V IH EN IN L Level Input Current IIL -2 0 - A VEN=0V EN H Time t 0.05 - 100 sec HI EN L Time tLO 0.3 - 100 sec EN OFF Time-Out t 1 - - msec OFF IN Supply -> EN Active Time tVINON 1 - - msec EN Stand-by -> VBAT OFF Time t 0 - - msec VINOFF (Note 1) The following formula is used for calculation: I match = (I - I ) / (I + I ) x 100 LED- MAX MIN MAX MIN I = The maximum current value from all channels MAX I = The minimum current value from all channels MIN www.rohm.com TSZ02201-0G3G0C200060-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/17 TSZ2211115001 10.Dec.2015 Rev.002