Datasheet 6-Channel White LED Driver with Integrated FET for up to 60 LEDs BD6590MUV General Description Key Specifications BD6590MUV is white LED driver IC with PWM step-up Operating power supply voltage range: 4.5V to 5.5V DC/DC converter that can boost max 40V and current LED maximum current: 30mA (Max.) driver that can drive max 30mA. The wide and Switching frequency: 1.25MHz(Typ.) precision brightness can be controlled by external Quiescent Current: 0.1A (Typ.) PWM pulse. Operating temperature range: -40 to +85 BD6590MUV has very accurate current drivers, and it has few current errors between each strings. Package W(Typ.) x D(Typ.) x H(Typ.) So, it will be helpful to reduce brightness spots on the LCD. Small package type is suited for saving space. Features High accuracy & good matching current drivers (MAX30mA/ch) Integrated 50V power Nch MOSFET Soft start Drive up to 10 in series 6strings in parallel VQFN024V4040 Rich safety functions 4.00mm x 4.00mm x 1.00mm Over-voltage protection Over current limit Figure 1. LED terminal open/short protect External SBD open detect / Output Applications short protection All middle size LCD equipments backlight of Notebook UVLO PC, NetPC, portable DVD player, DPF, etc. Thermal shutdown Typical Application Circuit Adapter Battery 4.5V to 30V 4.5V to 5.5V 10F 4.7H 10S 6P 2.2F/50V 1F FAILFLAG SW SW VBAT VBAT 1M 10k PWMDRV VDET 10K 26.7k PWM PWMPOW f =100Hz~1kHz PWM BD6590MUV RESET RSTB LED1 TEST LED2 LED3 LED4 LED5 LED6 OCPSET Each 16mA 68k PGND GND GND ISET 27k Figure 2. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0G3G0C400200-1-2 2012 ROHM Co., Ltd. All rights reserved. 1/27 TSZ2211114001 07.Nov.2016 Rev.002Datasheet BD6590MUV Absolute Maximum Ratings (Ta=25) Parameter Symbol Ratings Unit Condition VBAT, ISET, TEST, RSTB, PWMDRV Terminal voltage 1 VMAX1 7 V PWMPOW, VDET, FAILFLAG, OCPSET Terminal voltage 2 VMAX2 25 V LED1, LED2, LED3, LED4, LED5, LED6 Terminal voltage 3 VMAX3 41 V SW *1 Power dissipation 1 Pd1 500 mW *2 Power dissipation 2 Pd2 780 mW *3 Power dissipation 3 Pd3 1510 mW Operating temperature range Topr -40 to +85 - Storage temperature range Tstg -55 to +150 - *1 Reduced 4.0mW/ With Ta>25 when not mounted on a heat radiation Board. 2 *2 1 layer (ROHM Standard board) has been mounted. Copper foil area 0mm , When its used by more than Ta=25, its reduced by 6.2mW/. 2 2 *3 4 layer (JEDEC Compliant board) has been mounted. Copper foil area 1layer 6.28mm , Copper foil area 2 to 4layers 5655.04mm , When its used by more than Ta=25, its reduced by 12.1mW/. Recommended Operating Rating (Ta=-40 to +85) Limits Parameter Symbol Unit Condition Min. Typ. Max. Power supply voltage VBAT 4.5 5.0 5.5 V Electrical Characteristics (Unless otherwise specified, VBAT=5V, Ta = +25) Limits Parameter Symbol Unit Condition Min. Typ. Max. Quiescent current Iq - 0.1 4.4 A PWMPOW=PWMDRV=RSTB=0V Current consumption Idd - 3.2 4.8 mA VDET=0V,ISET=27k PWMPOW Terminal Low input voltage range1 POWL 0 - 0.9 V High input voltage range1 POWH 2.1 - VBAT V Pull down resistor1 POWR 100 300 500 k PWMPOW=3V PWMDRV Terminal Low input voltage range2 PDRVL 0 - 0.9 V High input voltage range2 PDRVH 2.1 - 5.5 V Pull down resistor2 DRVR 100 300 500 k RSTB Terminal Low input voltage range3 RSTBL 0 - 0.9 V RSTBH High input voltage range3 2.1 - 5.5 V Pull down resistor3 RSTBR 100 300 500 k FAILFLAG Input resistor FFIR 1.0 2.0 3.0 k FAILFLAG=2.5V Off current FFIST - 0.1 2.0 A PWMPOW=0V Regulator Under voltage lock out UVLO 2.9 3.3 3.7 V VBAT falling edge Switching Regulator LED control voltage VLED 0.56 0.70 0.84 V Switching frequency fsw 1.00 1.25 1.50 MHz RSTB=L (GND short) Duty cycle limit Duty 91 95.0 99.0 % LED1-6=0.3V SW Nch FET RON RON - 0.48 0.58 ISW=80mA www.rohm.com TSZ02201-0G3G0C400200-1-2 2012 ROHM Co., Ltd. All rights reserved. 2/27 TSZ2211115001 07.Nov.2016 Rev.002