Shanghai Aeneas Electronics.CO.,LTD. 上海东钜电子有限公司

RICOH/power

R1283X Series

2ch DCDC for CCD & OLED
The R1283X 2ch DC/DC converter is designed for CCD & OLED Display power source. It contains a step up DC/DC converter and an inverting DC/DC converter to generate two required voltages by CCD & OLED Display. Step up DC/DC converter generates boosted output voltage up to 20V. Inverting DC/DC converter generates negative voltage up to Vin voltage minus 20V independently. Start up sequence is internally made. Each of the R1283X series consists of an oscillator, a PWM control circuit, a voltage reference, error amplifiers, over current protection circuits, short protection circuits, an under voltage lockout circuit (UVLO), an Nch driver for boost operation, a Pch driver for inverting, and so on. A high efficiency boost and inverting DC/DC converter can be composed with external inductors, diodes, capacitors, and resistors.

Feature
● Operating Voltage	2.5V to 5.5V
● Step Up DC/DC (CH1)
Internal Nch MOSFET Driver (Ron=400mΩTyp.) Adjustable Vout Up to 20V with external resistor Internal Soft start function (Typ. 4.5ms) Over Current Protection Maximum Duty Cycle: 91%(Typ.)
● Inverting DC/DC (CH2)
Internal Pch MOSFET Driver (Ron=400mΩ Typ.) Adjustable Vout Up to Vdd-20V with external resistor Auto Discharge function for negative output Internal Soft start function (Typ. 4.5ms) Over Current Protection Maximum Duty Cycle: 91%(Typ.)
● Short Protection with timer latch function (Typ. 50ms); Short condition for either or both two outputs makes all output drivers off and latches./ If the maximum duty cycle continues for a certain time, these output drivers will be turned off.
CE with start up sequence function CH1→CH2 (R1283K001X)/CH2->CH1(R1283K002X) Selectable UVLO function. Operating Frequency Selection :300kHz / 700kHz / 1400kHz
● Small Packages	DFN（PLP）12 ( 2.7mm x 3.0mm ) or WLCSP11( 1.5mm x 2.4mm )

Applications
● Fixed voltage power supply for portable equipment
● Fixed voltage power supply for CCD,OLED,LCD

Data Sheet(PDF)
R1283X Series