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Datasheet
4-Channel White LED Driver
with Integrated FET for up to 24 LEDs
BD6586MUV
● General Description
BD6586MUV is white LED driver IC with PWM step-up
● Key Specifications
? Operating power supply voltage range: 2.7V to 5.5V
DC/DC converter that can boost max 24V and current
driver that can drive max 25mA. The wide and
precision brightness can be controlled by external
? LED maximum current:
? Quiescent Current:
? Switching frequency:
25mA (Max.)
0.1 μ A (Typ.)
1.0MHz(Typ.)
PWM pulse.
BD6586MUV has very accurate current drivers, and it
? Operating temperature range: -40 ℃ to +85 ℃
has few current errors between each strings. 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 (±3.0%) current
drivers 4ch (MAX.25mA/ch)
■
28V power Nch MOSFET
■
Soft Start
■
Drive up to 6 in series, 4 strings in parallel
● Package
W(Typ.) x D(Typ.) x H(Max.)
■
Rich safety functions
? Over-voltage protection
? Output Short protection
? External SBD open detect
? Over current limit
? Thermal shutdown
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Figure 1.
? UVLO
● Applications
All middle size LCD equipments backlight of Notebook
● Typical Application Circuit
Battery
2.7V to 5.5V
PC, portable DVD player, car navigation systems, etc.
4.7 μ F
4.7 μ H
2.2 μ F
1 μ F
6LED x 4Parallel
SW
SW
SW
VBAT
VDET
TRSW
100Hz~1kHz
PWM
EN2
LED1
EN1
LED2
PWM
LED3
TESTO
TEST
PGND PGND GND
GND
GND
ISET
LED4
Each 20mA
Can be set up to each 10~25mA
24k ?
Figure 2. Typical Application Circuit
(Power control PWM application)
○ Product structure ： Silicon monolithic integrated circuit
○ This product is not designed protection against radioactive rays
www.rohm.com
? 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111 ? 14 ? 001
1/20
TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001
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