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TPS65197: Can TPS65197/B support 1*STV, 4*CLK with charge sharing, 2*VDD without charge sharing?

Kevin Wen
Intellectual 2105 points
Part Number: TPS65197

Hi team,

would you please suggest if TPS65197/B can support below application? thanks. 

Customer have 1*STV signal, 4*CLK signals that need 2-channel charge sharing, 2*VDD (VDDODD and VDDEVEN) signal that do not need charge sharing, totally 7 signals in a MNT panel. 

we are thinking of using TPS65197/B in this panel, using CLK1,2,4,5 channel for 4*CLK signal and enable 2-channel charge sharing, then using CLK3,6 channel for 2*VDD signals and remove charge sharing resistor between CS_3 and CLKOUT3 (Pin 26,27). 

Kevin

  • 0
    TI__Guru 59445 points

    Hello Kevin,

    Your idea is good and should work. All channels are direct input to output channels (with charge sharing).

    Please keep in mind that in TPS65197 CLKIN1 is gating. See datasheet section 8.3.2 and section 8.4.1.

    In both devices, charge sharing is stopped at the rising edge of STVIN, TPS65197 forces the outputs to VGL1 until the next rising edge of CLKIN1, in TPS65197B the outputs follow their inputs until the next charge sharing event is initiated.

    I think it makes sense to use TPS65197B for this to not reset VDDODD and VDDEVEN to VGL with the rising edge of STVIN.

    Best regards,
    Brigitte