BD6586MUV_12 Datasheet, PDF (1/24 Pages) Rohm – 4-Channel White LED Driver

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
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
PWM pulse.
BD6586MUV 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.
Small package type is suited for saving space.
˔Key Specifications
 Operating power supply voltage range: 2.7V to 5.5V
 LED maximum current:
25mA (Max.)
 Quiescent Current:
0.1μA (Typ.)
 Switching frequency:
1.0MHz(Typ.)
 Operating temperature range:
-40ˆ to +85ˆ
˔Package W(Typ.) x D(Typ.) x H(Max.)
˔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
■ Rich safety functions
▪ Over-voltage protection
▪ Output Short protection
▪ External SBD open detect
▪ Over current limit
▪ Thermal shutdown
▪ UVLO
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Figure 1.
˔Typical Application Circuit
Battery
2.7V to 5.5V
˔Applications
All middle size LCD equipments backlight of Notebook
PC, portable DVD player, car navigation systems, etc.
4 .7μ F
4. 7μ H
2. 2μF
1 μF
6LED x 4Parallel
1 00H z~1 kHz
PWM
SW SW SW
TRSW
VBAT VDET
EN2
EN1
PWM
TESTO
TEST PGND PGND GND
GND GND
L ED 1
LED2
L ED 3
L ED 4
ISET
2 4k Ω
Each 20mA
Can be set up to each 10~25mA
Figure 2. Typical Application Circuit
(Power control PWM application)
˓Product structureɿSilicon monolithic integrated circuitç ˓This product is not designed protection against radioactive rays
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TSZ02201-0G3G0C400190-1-2
10.Dec.2012 Rev.001