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BD6142AMUV Dataheets PDF



Part Number BD6142AMUV
Manufacturers ROHM
Logo ROHM
Description 8-Channel White LED Driver
Datasheet BD6142AMUV DatasheetBD6142AMUV Datasheet (PDF)

Datasheet 8-Channel White LED Driver with Integrated FET for up to 80 LEDs BD6142AMUV ●General Description 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. 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 suite.

  BD6142AMUV   BD6142AMUV



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Datasheet 8-Channel White LED Driver with Integrated FET for up to 80 LEDs BD6142AMUV ●General Description 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. 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 ●Applications All medium sized LCD equipments, Backlight of Notebook PC, net book, monitor, light, Portable DVD player, light source etc. ●Typical Application Circuit (8 Parallel) 10µF 7V to27V 10µH 2.2µ F/50V 2.2µF VOUT 10 serial x 8 parallel (80pcs) 2.1V to VIN RESET LX LX ENAB LE FAULT VIN VDC OV P PWM PWM fPW M=100Hz~25kHz 1kΩ 22nF GND PG ND CO MP PGND B D 61 42 AM U V PGND GND TEST FSET ABC ISET CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8 56kΩ 1nF 36kΩ Figure 2. Typical Application Circuit 2.2MΩ 68kΩ 20mA ○Product structure:Silicon monolithic integrated circuit www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. TSZ22111・14・001 ○This product is not designed protection against radioactive rays 1/30 TSZ02201-0G3G0C400340-1-2 07.Nov.2016 Rev.002 BD6142AMUV Datasheet ●Absolute Maximum Ratings (Ta=25℃) Parameter Symbol Ratings Unit Condition Terminal voltage 1 Terminal voltage 2 VMAX1 VMAX2 7 45 V VDC, ISET, ABC, COMP, FSET, TEST, FAULT V CH1 to CH8, LX, OVP Terminal voltage 3 VMAX3 30.5 V VIN, ENABLE Terminal voltage 4 Power dissipation 1 Power dissipation 2 Power dissipation 3 VMAX4 Pd1 Pd2 Pd3 15 500 *1 780 *2 1510 *3 V PWM mW mW 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 1 layer (ROHM Standard board) has been mounted. Copper foil area 0mm2, When it’s used by more than Ta=25 ℃, it’s reduced by 6.2mW/ ℃. *3 4 layer (JEDEC Compliant board) has been mounted. Copper foil area 1layer 6.28mm2, Copper foil area 2 to 4layers 5655.04mm2, When it’s used by more than Ta=25 ℃, it’s reduced by 12.1mW/℃. ●Recommended Operating Rating (Ta=-40℃ to +85℃) Parameter Power supply voltage Symbol VIN Min. 4.2 Limits Typ. 12.0 Max. 27.0 Unit V Conditions ●Electrical Characteristics (Unless otherwise specified, VIN=12V, Ta = +25℃) Parameter Limits Symbol Min. Typ. Max. Unit [General] Quiescent Current Iq - 1.6 4.4 µA Current Consumption Idd - 3.6 5.4 mA Max. Output Voltage MOV - - 41 V Under Voltage Lock Out [ENABLE Terminal] Low Input Voltage range UVLO 3.1 3.7 4.1 EnL 0.0 - 0.8 V V High Input Voltage range1 EnH 2.0 - VIN V Pull down resistor EnR 100 300 500 kΩ Output Current [PWM Terminal] Low Input Voltage range ENIout - 0 2 µA PWML 0.0 - 0.8 V High Input Voltage range2 PWMH 1.3 - 12.0 V Pull down resistor PWMR 100 300 500 kΩ Output Current PWMIout - 0 2 µA [FAULT] Nch RON [Regulator] VDC Voltage FFCR - - 3 kΩ VREG 4.2 5.0 6.0 V Conditions ENABLE=0V OVP=0V,ISET=36kΩ VIN falling edge ENABLE=3V ENABLE=0V PWM=3V PWM=0V ENABLE =PWM=3V, OVP=2V No load, VIN > 6V www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. TSZ22111・15・001 2/30 TSZ02201-0G3G0C400340-1-2 07.Nov.2016 Rev.002 BD6142AMUV Datasheet ●Electrical Characteristics – continued (Unless otherwise specified, VIN=12V, Ta = +25℃) Parameter Limits Symbol Min. Typ. Max. Unit [Switching Regulator] Conditions LED Control voltage VLED 0.64 0.80 0.96 V Switching frequency accuracy Fsw 1.00 1.25 1.50 MHz FSET=56kΩ Duty cycle limit Duty 91.0 95.0 99.0 % CH1-8=0.3V, FSET=56kΩ LX Nch FET RON [Protection] RON - 0.48 0.58 Ω ILX=80mA Over Current Limit Ocp 1.5 2.5 - A *1 Over voltage limit Input OVP 1.16 1.20 1.24 V Detect voltage of OVP Output Short Protect OVPfault 0.02 0.05 0.08 V Detect voltage of OVP OVP leak current CH Terminal Over Voltage Protect accuracy [Current driver] OVIL - 0.1 1.0 µA VSC -15 0 +15 % VSC=5V LED maximum curre.


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