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R1283K Series

2ch DC/DC for CCD & OLED

Data Sheet / Flyer

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. A high efficiency boost and inverting DC/DC converter can be composed with external inductors, diodes, capacitors, and resistors.

Note : Discontinued Products
WLCSP-11-P2 (R1283Z Series) will be discontinued at the end of January, 2014.

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
Packages	DFN(PLP)2730-12, WLCSP-11-P2 (Non-promotion)