BL0202B Datasheet, PDF (1/26 Pages) Sanken electric – High Efficiency For LED Backlight

High Efficiency
For LED Backlight 2ch LED Driver IC
BL0200 Series
General Descriptions
BL0200 series are 2ch output LED driver IC for LED
backlight, and it can do dimming to 0.02 % by external
PWM signal.
This IC realizes a high efficiency by the boost
convertor control that absorbs variability on V_F.
The product easily achieves high cost-performance
LED drive system with few external components and
enhanced protection functions.
Package
SOP18
Features and Benefit
Boost convertor
● Current-Mode type PWM Control
● PWM frequency is 100 kHz o r 200 kHz
● Maximum On Duty is 90 %
LED current control
● Individual PWM Dimming Control
● Analog Dimming
● High contrast ratio is 1 / 5000
● Accuracy of Reg output voltage is ± 1.5 % or ± 2 %
Protection functions
● Enable Function of IC (BL0202B, BL0202C)
● Error Signal Output (BL0200C)
● Overcurrent Protection for Boost Circuit (OCP)
----------------------------------------------Pulse-by-pulse
● Overcurrent Protection for LED Output (LED_OCP)
----------------------------------------------Pulse-by-pulse
● Overvoltage Protection (OVP) ----------- Auto restart
● Output Open/Short Protection ------------ Auto restart
● Thermal Shutdown (TSD)----------------- Auto restart
Not to scale
Lineup
Products
BL0202C
BL0202B
BL0200C
Frequency
200 kHz
100 kHz
V_REG
Accuracy
± 1.5 %
Built-in Function
Enable Function of
IC
200 kHz ± 2 % Error Signal Output
Applications
● LED backlights
● LED lighting etc.
Typical Application Circuit
BL0200C
VCC
DRV1
VREF
PWM1
PWM2
OC1
SW1
ER
IFB1
BL0202B/C
VCC
DRV1
VREF
PWM1
PWM2
OC1
SW1
EN
IFB1
DRV2
OC2
REG
COMP1
COMP2
GND
OVP
SW2
IFB2
DRV2
OC2
REG
COMP1
COMP2
GND
OVP
SW2
IFB2
BL0200-DS Rev.2.1
SANKEN ELECTRIC CO.,LTD.
1
Feb. 25, 2014