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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
● Key Specifications
? Operating power supply voltage range: 4.2V to 27.0V
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
? LED maximum current:
? Quiescent Current:
? Switching frequency:
30mA (Max.)
1.6 μ A (Typ.)
1.25MHz(Typ.)
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
? 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)
7V to 27V
10μF
10μH
2.2μF/50V
2.2μF
VOUT
10 serial x 8 parallel (80pcs)
LX
LX
FAULT
VIN
VDC
2.1V to VIN
2.2M ?
RESET
PWM
f PW M =100Hz~25kHz
ENABLE
PWM
OVP
68k ?
1k ?
22nF
CO MP
BD6142AMUV
CH1
CH2
CH3
CH4
CH5
CH6
CH7
PGND
PGND
GND
TEST FSET
ABC
ISET
CH8
56k ? 1nF
36k ?
20mA
GND
PGND
Figure 2. Typical Application Circuit
○ Product structure ： Silicon monolithic integrated circuit
○ This product is not designed protection against radioactive rays
www.rohm.com
? 2011 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 14 ? 001
1/30
TSZ02201-0G3G0C400340-1-2
03.Dec.2012 Rev.001
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