Datasheet 8-Channel White LED Driver with Integrated FET for up to 80 LEDs BD6142AMUV General Description Key Specifications This IC is white LED driver IC with PWM step-up Operating power supply voltage range: 4.2V to 27.0V DC/DC converter that can boost max 41V and current LED maximum current: 30mA (Max.) driver that can drive max 30mA. The wide and Quiescent Current: 1.6A (Typ.) precision brightness can be controlled by external Switching frequency: 1.25MHz(Typ.) PWM pulse. This IC has very accurate current drivers, Operating temperature range: -40 to +85 and it has few current errors between each strings. So, it will be helpful to reduce brightness spots on the LCD Package W(Typ.) x D (Typ.) x H(Max.) panel. Small package is suited for saving space. VQFN024V4040 4.00mm x 4.00mm x 1.00mm 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 VQFN024V4040 Over current limit CH Terminal open / GND short protect Figure 1. Package CH over voltage protect / LED short protect Thermal shutdown Applications UVLO All medium sized LCD equipments, Backlight of Analog Brightness Control Notebook PC, net book, monitor, light, Portable DVD player, light source etc. Typical Application Circuit (8 Parallel) 7V to 27V 10F 10 serial x 8 parallel (80pcs) 10H VOUT 2.2F/50V 2.2F LX LX FAULT VIN VDC 2.1V to VIN 2.2M RESET ENABLE OVP 68k PWM PWM f =100Hz~25kHz PW M COMP BD6142AMUV CH1 1k CH2 22nF CH3 CH4 CH5 CH6 CH7 CH8 GND TEST FSET ABC PGND PGND ISET 20mA 56k 1nF 36k GND PGND Figure 2. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed protection against radioactive rays www.rohm.com TSZ02201-0G3G0C400340-1-2 2011 ROHM Co., Ltd. All rights reserved. 1/30 TSZ2211114001 07.Nov.2016 Rev.002Datasheet BD6142AMUV Absolute Maximum Ratings (Ta=25) Parameter Symbol Ratings Unit Condition VDC, ISET, ABC, Terminal voltage 1 VMAX1 7 V COMP, FSET, TEST, FAULT Terminal voltage 2 VMAX2 45 V CH1 to CH8, LX, OVP Terminal voltage 3 VMAX3 30.5 V VIN, ENABLE Terminal voltage 4 VMAX4 15 V PWM *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 Conditions Min. Typ. Max. Power supply voltage VIN 4.2 12.0 27.0 V Electrical Characteristics (Unless otherwise specified, VIN=12V, Ta = +25) Limits Parameter Symbol Unit Conditions Min. Typ. Max. General Quiescent Current Iq - 1.6 4.4 A ENABLE=0V Current Consumption Idd - 3.6 5.4 mA OVP=0V,ISET=36k Max. Output Voltage MOV - - 41 V Under Voltage Lock Out UVLO 3.1 3.7 4.1 V VIN falling edge ENABLE Terminal Low Input Voltage range EnL 0.0 - 0.8 V High Input Voltage range1 EnH 2.0 - VIN V Pull down resistor EnR 100 300 500 k ENABLE=3V Output Current ENIout - 0 2 A ENABLE=0V PWM Terminal Low Input Voltage range PWML 0.0 - 0.8 V High Input Voltage range2 PWMH 1.3 - 12.0 V Pull down resistor PWMR 100 300 500 k PWM=3V Output Current PWMIout - 0 2 A PWM=0V FAULT Nch RON FFCR - - 3 k ENABLE =PWM=3V, OVP=2V Regulator VDC Voltage VREG 4.2 5.0 6.0 V No load, VIN > 6V www.rohm.com TSZ02201-0G3G0C400340-1-2 2011 ROHM Co., Ltd. All rights reserved. 2/30 TSZ2211115001 07.Nov.2016 Rev.002