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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STVM100 데이터시트(PDF) 12 Page - STMicroelectronics |
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STVM100 데이터시트(HTML) 12 Page - STMicroelectronics |
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12 / 27 page  Application information STVM100 12/27 If the user-selected value is 0 (zero scale), the minimum current is sunk. The maximum VCOM value is obtained in Equation 3. Equation 3 If the user-selected value is 127 (full scale), the maximum current is sunk and the minimum VCOM value is obtained in Equation 4. Equation 4 During operation, the VCOM(max) and VCOM(min) range is set, based on different TFT-LCD processes.The R1 value is given based on the acceptable power loss from the AVDD supply rail. Using Equation 3 and Equation 4, the R2 and RSET values can be calculated. If RSET is put into Equation 1 on page 11 and maximum IOUT ≥ 120µA, then R1 should be increased. V COM max () R 2 R 1 R 2 + -------------------- AV DD 1 1 128 ---------- R 1 20 R SET () -------------------------- ⋅ – ⎝⎠ ⎛⎞ ⋅ = V COM min () R 2 R 1 R 2 + -------------------- AV DD 1 R 1 20 R SET () -------------------------- – ⎝⎠ ⎛⎞ ⋅ = |
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