The R1286 series 2ch DC/DC power converter is designed for AMOLED display power source. It contains a step up DC/DC converter and an inverting DC/DC converter. Step up DC/DC converter generates boosted output voltage to 4.6V ~ 5.8V(Selectable). Inverting DC/DC converter generates negative voltage down to -2.0V ~ -6.0V(Selectable) that is dynamically adjustable with single wire interface signal. R1286 consist of a voltage reference, error amplifiers, an oscillator, PWM control circuits, over current protection circuits, short protection circuits, an under voltage lockout circuit (UVLO), thermal shutdown circuit, a NMOS driver and a synchronous PMOS switch for boost converter, a PMOS driver and a synchronous NMOS switch for inverting converter, and so on. High efficiency boost and inverting DC/DC converters can be composed with two external inductors and three capacitors.
The Ricoh R1286K is a 2-channel DC/DC converter designed specifically for AMOLED display power sources. It integrates a step-up DC/DC converter and an inverting DC/DC converter into a single package. The step-up channel generates a selectable output voltage between 4.6V and 5.8V, while the inverting channel produces a negative voltage ranging from -2.0V to -6.0V, which is dynamically adjustable via a single-wire interface signal.
| Operating Voltage | 2.3V to 4.8V |
|---|---|
| Step Up Output Voltage | 4.6V to 5.8V |
| Inverting Output Voltage | -2.0V to -6.0V |
| Output Current | 250mA |
| Operating Frequency | 1.5MHz to 2MHz |
| Operating Temperature Range | -40 to +85 °C |
| Package Type | DFN(PLP)2730-12 |
The operating input voltage ranges from 2.3V to 4.8V.
The step-up channel outputs 4.6V to 5.8V, and the inverting channel outputs -2.0V to -6.0V.
Both the step-up and inverting channels provide a maximum output current of 250mA.