R1200x SERIES
STEP-UP DC/DC CONVERTER FOR OLED BACK LIGHT with SHUTDOWN FUNCTION
NO.EA-192-130502
OUTLINE
R1200x series ...
R1200x SERIES
STEP-UP DC/DC CONVERTER FOR OLED BACK LIGHT with SHUTDOWN FUNCTION
NO.EA-192-130502
OUTLINE
R1200x series are
CMOS-based control type step-up DC/DC converter with low supply current ICs. Each of these ICs consists of a Nch
MOSFET, NPN transistor, an oscillator, 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), and a soft start circuit. As the external components, an inductor, resistances or
capacitors are necessary to make a constant output
voltage of step-up DC/DC converter with the R1200x. At standby mode, the NPN transistor can separate the output from the input. During the situation of that, there are two versions. R1200xxxxA: the output of VOUT is generated to 0V by the low resistance (with the auto discharge function). R1200xxxxB does not generate the output of VOUT (without the auto discharge function).
The soft-start time (Typ. 1.5ms) and the maximum duty cycle (Typ. 91%) are set internally. For the protection functions of R1200x series are the current limit function of the LX peak current, the OVP function for detection the over
voltage of output and the UVLO function for protective miss-operation by the low
voltage. (The threshold of OVP is selectable from 17V, 19V or 21V.)
Since the packages for these ICs are DFN1616-6, DFN(PLP)1820-6, SOT-23-6 and WLCSP-6-P1 (Non-promotion), therefore high density mounting of the ICs on boards is po...