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R1283x Series

2ch DCDC for CCD & OLED

Outline

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.

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Features

Operating Voltage

2.5V - 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 package

DFN（PLP）12 ( 2.7mm x 3.0mm ) or WLCSP11( 1.5mm x 2.4mm )

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Applications

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

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Documents Download

Data Sheet (PDF)	Package Info. (PDF)	Mark Info. (PDF)	Quality Assurance Data (PDF)
R1283x Series NO.EA-157-071019(417KB)	DFN(PLP)2730-12	to be prepared	Reliability
	WLCSP-11-P2	to be prepared	Reliability