R1218x SERIES
Step-up DC/DC converter for White LED Backlight
NO.
EA-166-170906
OUTLINE
The R1218x Series are PWM control type step-up DC/DC converter ICs with low supply current.
The R1218x is fully dedicated to drive White LED with constant current.
Each of these ICs consists of an NMOS FET, an oscillator, a PWM comparator, a
voltage reference unit, an error amplifier, a current limit circuit, an under
voltage lockout circuit (UVLO), an over-
voltage protection circuit (OVP).
The R1218x can drive white LEDs with high efficiency with low supply current.
A diode is built-in the R1218xxx1A, therefore it is possible to drive up to 4LEDs without an external diode.
The R1218xxx2A, an external d...