RICOH R1286K SERIES 2ch DCDC (Step Up DC-DC and Inverting DC-DC) Data Manual
Summary
This high-efficiency dual DC/DC converter is engineered specifically for powering demanding applications, such as AMOLED displays and portable electronics, by generating both boosted positive (step-up) and adjustable negative (inverting) voltages. Featuring a single-wire interface (S-Wire) for dynamic voltage control and comprehensive protection circuits like UVLO and thermal shutdown, it ensures reliable power delivery. This resource provides detailed technical specifications, selection guides, and operational diagrams necessary for engineers integrating stable, bi-polar power solutions into complex electronic designs.
Page 1 Text Content
R1286K SERIES
2ch DCDC (Step Up DC/DC and Inverting DC/DC)
NO.EA-283-120228
OUTLINE The R1286 2ch DC/DC 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.
FEATURES • Operating Voltage 2.3V to 4.8V • Step Up DC/DC (CH1) Output Voltage (VOUTP) 4.6V to 5.8V (Selectable / 0.1V Step) [ R1286Kxxx X ] Adjustable VOUT from 4.6V to 5.8V with external resistors [ R1286K001B ] Output Current (IOUTP)........................................... 250m A • Inverting DC/DC (CH2) Dynamically adjustable Output Voltage (VOUTN)…..-2.0V to -6.0V (Range is fixed 3.0V / 0.1V Step) Single wire (S-Wire) interface (Default Value is Selectable / 0.1V Step) [ R1286Kxxx X ] Adjustable VOUT from -2.0V to -6.0V with external resistors [ R1286K001B ] Output Current (IOUTN)........................................... 250m A • Control and Protection Internal start up sequence control with soft start operation Auto discharge operation for both outputs Over current protection and short circuit protection UVLO(Under voltage lock out) protection 2.05V Thermal shutdown 150°C Operating frequency 1750k Hz Maximum Duty Cycle 85% for boost converter / 90% for inverting converter • Package DFN(PLP)2730-12
APPLICATION • Fixed voltage power supply for portable equipment • Fixed voltage power supply for AMOLED, LCD
Page Summary Contents For RICOH R1286K SERIES 2ch DCDC (Step Up DC-DC and Inverting DC-DC) Data Manual
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 25 |
| File Size | 857.96 KB |
| Published | June 01, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the primary application of the R1286 module?
It is designed as a DC/DC converter for generating power sources for AMOLED displays.
How is the negative output voltage (VOUTN) controlled?
The negative voltage can be dynamically adjusted using a Single wire (S-Wire) interface signal.
What protection features are built into this DC/DC converter?
It includes Over current protection, short circuit protection, and Under voltage lock out (UVLO).
How do I adjust the positive output voltage (VOUTP)?
The VOUTP can be adjusted using external resistors or through selectable model variants.