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Full CMOS 프로세스를 이용한 저소비전력으로 High accuracy・고성능의 IC를 다양한 소형Package로 0.1V단위의
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The R1290 series are the optimized DC/DC converter ICs for TFT LCD displays. Each of the R1290 series contains one PWM step-up DC/DC converter controller and two diode charge-pump controllers. The charge-pumps can control a boost output and a negative output and have the output voltage regulation function with external resistors.
The power on sequence can be made with setting the delay time with external capacitors for each charge pump channel.
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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