BD6583MUV-A_12 Datasheet, PDF (1/36 Pages) Rohm – 6-Channel White LED Driver

Datasheet
6-Channel White LED Driver
for up to 72 LEDs
BD6583MUV-A
˔General Description
BD6583MUV-A 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. BD6583MUV-A 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 22.0V
 LED Maximum Current:
25mA (Max.)
 Quiescent Current 1:
0.6μA (Typ.)
Quiescent Current 2:
4.6μA (Typ.)
 Operating temperature range:
-30ˆ to +85ˆ
˔Package W(Typ.) x T(Typ.) x H(Max.)
˔Features
 High efficiency PWM step-up DC/DC converter
(fsw=1MHz), max efficiency 93%
 High accuracy & good matching (±3%) 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
VQFN024V4040
4.00mm x 4.00mm x 1.00mm
Figure 1. Package
˔Applications
All middle size LCD equipments backlight of Notebook
PC, portable DVD player, car navigation systems, etc.
˔Typical Application Circuit
Battery
10μF
4.7μH
2.2μF
RTR020N05
100mΩç
Power
ON/OFF
200Hz
PWM
1μF
SW
SENSP
FAILSEL _VDET
SENSN
RSTB BD6583MUV-A
PWMPOW
PWMDRV
VBAT
VREG
LED1
LED2
LED3
LED4
LED5
GNDGNDGNDGNDTEST ISETHISETL_LED6
24kΩ
10LED x 6parallel
Each 20mA
Figure 2F. _{iTgyuprieca2l.ATpyppliiccaaltiAopnpCliciractuioitn Circuit}
˓Product structureɿSilicon monolithic integrated circuitç ˓This product is not designed protection against radioactive rays
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