Chin. J. Semicond. > 2007, Volume 28 > Issue 5 > 802-809

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Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC

Wei Tingcun, Lin Yanjun, Gao Wu and Lü Lifeng

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Abstract: A build-in power supply circuits IP core for TFT-LCD driver IC is designed using 0.25μm CMOS LV/MV/HV hybrid voltage process.It is composed by four sub-blocks such as LDO regulators,capacitor-switched charge-pump circuits,VCOM and Vgoff driving buffer circuits.Both power supply voltages for TFT-LCD driver IC and driving voltages for TFT-LCD panel can be provided by this IP core.The temperature coefficients of voltages generated by LDO regulators are less than 13.7ppm/℃.A new topology of charge pump which generates the highest voltage VGH and the lowest voltage VGL is proposed,and the settling time of VGH and VGL is reduced to less than 100ms.The voltages generated by VCOM and Vgoff driving buffer circuits can be adjusted by programmable register.All generated voltages are with their stable values in 200ms when power is on.The static power dissipation of this IP core is less than 2mW.

Key words: TFT-LCDdriver ICpower supply IP coreLDOcharge-pump

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    Received: 18 August 2015 Revised: 18 December 2006 Online: Published: 01 May 2007

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      Wei Tingcun, Lin Yanjun, Gao Wu, Lü Lifeng. Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC[J]. Journal of Semiconductors, 2007, 28(5): 802-809. ****Wei T C, Lin Y J, Gao W, Lü L. Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC[J]. Chin. J. Semicond., 2007, 28(5): 802.
      Citation:
      Wei Tingcun, Lin Yanjun, Gao Wu, Lü Lifeng. Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC[J]. Journal of Semiconductors, 2007, 28(5): 802-809. ****
      Wei T C, Lin Y J, Gao W, Lü L. Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC[J]. Chin. J. Semicond., 2007, 28(5): 802.

      Design of a Built-In Power Supply IP Core for TFT-LCD Driver IC

      • Received Date: 2015-08-18
      • Accepted Date: 2006-11-10
      • Revised Date: 2006-12-18
      • Published Date: 2007-04-29

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