Datasheet
6-Channel White LED Driver for up to 72 LEDs
BD6581GU
General Description BD6581GU is white LED driver IC with PWM step-up DC/DC converter that can boost max 42.5V and current driver that can drive max 25mA. The wide and precision brightness can be controlled by external PWM pulse. BD6581GU 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. F.
6-Channel White LED Driver
Datasheet
6-Channel White LED Driver for up to 72 LEDs
BD6581GU
General Description BD6581GU is white LED driver IC with PWM step-up DC/DC converter that can boost max 42.5V and current driver that can drive max 25mA. The wide and precision brightness can be controlled by external PWM pulse. BD6581GU 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. Features High efficiency PWM step-up DC/DC converter (fsw=1MHz), max efficiency 93% High accuracy & good matching ( 1.5%) current drivers 6ch Drive up to 12 in series, 6 strings in parallel =72 white LEDs ( white LED Vf=3.5Vmax) Rich safety functions Over-voltage protection (OVP) Over current limit External SBD open detect Thermal shutdown Key Specification Operating power supply voltage range: 2.7V ~ 22.0V Quiescent Current 1: 0.6μA (Typ.) Quiescent Current 2: 4.6μA (Typ.) Operating temperature range: -30 ~+85 Package VCSP85H2: W(Typ.) x D(Typ.) x H (Max.) 2.60mm x 2.60mm x 1.00mm [bottom view]
E
LED6
LED5
LED4
LED3
LED2
D
RSTB
GND
FAILSEL
GND
LED1
C
VBAT
PWMPOW
VREG
ISETL
PWMDRV
B
N.C
-
TEST
ISETH
GND
A
VDET 1
N.C 2
SW 3
SENSP 4
SENSN 5
Application All middle size LCD equipments backlight of Notebook PC, portable DVD player, car navigation systems, etc. Typical Application Circuit
Battery 4.7μH 2 .2μF * RTR020N05 100mΩ SW SENSP SENSN
Power .