The RT4720AC is a triple channels DC-DC converter which is designed to provide the power of AMOLED. It integrates step up DC-DC and an inverting converter to provide the positive and negative output voltage required by AMOLED.
For the portable application, board space and efficiency are always major concerns. The high switching frequency of the RT4720AC allows the use of low inductance inductor to save the board space. It provides dual positive output voltage, one is a fixed 5.8V or 7.7V output voltage by SEL pin and the other positive output is fixed 4.6V. For the negative output voltage, it can be programmed by external MCU through single wire (SWIRE pin). The output voltage range of negative output voltage is –1.4V to –5.4V. The RT4720AC has OTP, SCP, UVLO and over-current protections. The RT4720AC is available in a WQFN-16L 3x3 package to achieve saving PCB space.
Applications
- Cellular Phones
- Digital Cameras
- PDAs and Smart Phones
- Probable Instrument