RICOH R1283x SERIES 2ch DC-DC Converter for CCD & OLED Quick User Guide & Data Sheet
Summary
This dual-channel DC/DC converter is engineered to provide stable power for demanding CCD and OLED display backlights. It features an independently boosting channel (CH1) providing positive voltage up to 20V and an inverting channel (CH2) generating negative output. The manual details system setup, multiple operating configurations, advanced protections (over current/short circuit), multiple frequencies, and package options. Ideal for engineers designing portable electronic devices requiring reliable dual-polar power sources for specialized display applications.
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R1283x SERIES
2ch DC/DC for CCD & OLED
NO.EA-157-120404
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. A high efficiency boost and inverting DC/DC converter can be composed with external inductors, diodes, capacitors, and resistors.
FEATURES • Operating Voltage 2.5V to 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 ..........300k Hz / 700k Hz / 1400k Hz
• Packages DFN(PLP)2730-12, WLCSP-11-P2 (Limited)
APPLICATION • Fixed voltage power supply for portable equipment • Fixed voltage power supply for CCD, OLED, LCD
Page Summary Contents For RICOH R1283x SERIES 2ch DC-DC Converter for CCD & OLED Quick User Guide & Data Sheet
Manual Details
| Brand | Ricoh |
|---|---|
| Pages | 25 |
| File Size | 526.60 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the basic function of the R1283x converter?
It provides power for CCD and OLED displays by generating two required voltages using a step-up and an inverting DC/DC converter.
How can I adjust the output voltage (VOUT)?
The VOUT for both channels is adjustable up to 20V (for CH1) or Vdd-20V (for CH2) by connecting an external resistor.
What types of protection features are built-in?
It includes Over Current Protection, Short Protection with a timer latch function, and Under Voltage Lockout (UVLO).
Does the device start up automatically?
Yes, the startup sequence is internally generated. You can also select the sequence: CH1→CH2 or CH2→CH1.