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TPS65168 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS65168 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 35 page 0 4 8 12 16 0 2 4 6 8 Time (ms) Digital Supply VS VSH VCOM−VS is connected to VS 0 4 8 12 16 0 2 4 6 8 Time (ms) Digital Supply VCOM−VS VS VSH BUF08630 SBOS515A – OCTOBER 2010 – REVISED AUGUST 2012 www.ti.com Power-Down Sequence When removing power from the BUF08630, the reverse sequence from that described in the Power- Up Sequence must be used. Figure 22 shows the sequence that must be followed when VCOM-VS is connected to VS. Figure 23 shows the sequence that must be followed when VCOM-VS is not connected to VS. Figure 23. Shutdown Requirement with Three Supplies A separate supply pin is provided for VCOM-VS so that separate supplies can be used for the gamma buffers and VCOM. The gamma buffers could be powered with a clean supply to prevent noise coupling into the gamma channels. The VCOM amplifier can then be supplied by a power source with more current Figure 22. Shutdown Requirement with Two capability, but with higher noise. Supplies It is highly recommended that a Schottky diode be placed between VS and VSH, as shown in Figure 37. 10 Submit Documentation Feedback Copyright © 2010–2012, Texas Instruments Incorporated Product Folder Links: BUF08630 |
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