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The R1285L 2ch DC/DC converter is designed for OLED Display power source. It contains a step up DC/DC
converter and an inverting DC/DC converter to generate two required voltages by OLED Display.
Step up DC/DC converter generates boosted output voltage to 4.6V ~ 5.0V. Inverting DC/DC converter generates
negative voltage -2.0V ~ -6.0V independently. Each of the R1285 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), a complete shutdown switch and 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. Start up sequence is internally made. |