BU97950FUV Datasheet, PDF (10/25 Pages) Rohm – Standard LCD Segment Drivers

BU97950FUV MAX 280 segments (SEG35×COM8)
○The relationship of electrical volume register (EVR) setting and V0 voltage
EVR
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Calculation
formula
VLCD= 5.500 VLCD= 5.000 VLCD= 4.000 VLCD= 3.500 VLCD= 3.000 VLCD= 2.500 [V]
VLCD
V0= 5.500 V0= 5.000 V0= 4.000 V0= 3.500 V0= 3.000 V0= 2.500 [V]
0.967*VLCD V0= 5.323 V0= 4.839 V0= 3.871 V0= 3.387 V0= 2.903 V0= 2.419 [V]
0.937*VLCD V0= 5.156 V0= 4.688 V0= 3.750 V0= 3.281 V0= 2.813 V0= 2.344 [V]
0.909*VLCD V0= 5.000 V0= 4.545 V0= 3.636 V0= 3.182 V0= 2.727 V0= 2.273 [V]
0.882*VLCD V0= 4.853 V0= 4.412 V0= 3.529 V0= 3.088 V0= 2.647 V0= 2.206 [V]
0.857*VLCD V0= 4.714 V0= 4.286 V0= 3.429 V0= 3.000 V0= 2.571 V0= 2.143 [V]
0.833*VLCD V0= 4.583 V0= 4.167 V0= 3.333 V0= 2.917 V0= 2.500 V0= 2.083 [V]
0.810*VLCD V0= 4.459 V0= 4.054 V0= 3.243 V0= 2.838 V0= 2.432 V0= 2.027 [V]
0.789*VLCD V0= 4.342 V0= 3.947 V0= 3.158 V0= 2.763 V0= 2.368 V0= 1.974 [V]
0.769*VLCD V0= 4.231 V0= 3.846 V0= 3.077 V0= 2.692 V0= 2.308 V0= 1.923 [V]
0.750*VLCD V0= 4.125 V0= 3.750 V0= 3.000 V0= 2.625 V0= 2.250 V0= 1.875 [V]
0.731*VLCD V0= 4.024 V0= 3.659 V0= 2.927 V0= 2.561 V0= 2.195 V0= 1.829 [V]
0.714*VLCD V0= 3.929 V0= 3.571 V0= 2.857 V0= 2.500 V0= 2.143 V0= 1.786 [V]
0.697*VLCD V0= 3.837 V0= 3.488 V0= 2.791 V0= 2.442 V0= 2.093 V0= 1.744 [V]
0.681*VLCD V0= 3.750 V0= 3.409 V0= 2.727 V0= 2.386 V0= 2.045 V0= 1.705 [V]
0.666*VLCD V0= 3.667 V0= 3.333 V0= 2.667 V0= 2.333 V0= 2.000 V0= 1.667 [V]
0.652*VLCD V0= 3.587 V0= 3.261 V0= 2.609 V0= 2.283 V0= 1.957 V0= 1.630 [V]
0.638*VLCD V0= 3.511 V0= 3.191 V0= 2.553 V0= 2.234 V0= 1.915 V0= 1.596 [V]
0.625*VLCD V0= 3.438 V0= 3.125 V0= 2.500 V0= 2.188 V0= 1.875 V0= 1.563 [V]
0.612*VLCD V0= 3.367 V0= 3.061 V0= 2.449 V0= 2.143 V0= 1.837 V0= 1.531 [V]
0.600*VLCD V0= 3.300 V0= 3.000 V0= 2.400 V0= 2.100 V0= 1.800 V0= 1.500 [V]
0.588*VLCD V0= 3.235 V0= 2.941 V0= 2.353 V0= 2.059 V0= 1.765 V0= 1.471 [V]
0.576*VLCD V0= 3.173 V0= 2.885 V0= 2.308 V0= 2.019 V0= 1.731 V0= 1.442 [V]
0.566*VLCD V0= 3.113 V0= 2.830 V0= 2.264 V0= 1.981 V0= 1.698 V0= 1.415 [V]
0.555*VLCD V0= 3.056 V0= 2.778 V0= 2.222 V0= 1.944 V0= 1.667 V0= 1.389 [V]
0.545*VLCD V0= 3.000 V0= 2.727 V0= 2.182 V0= 1.909 V0= 1.636 V0= 1.364 [V]
0.535*VLCD V0= 2.946 V0= 2.679 V0= 2.143 V0= 1.875 V0= 1.607 V0= 1.339 [V]
0.526*VLCD V0= 2.895 V0= 2.632 V0= 2.105 V0= 1.842 V0= 1.579 V0= 1.316 [V]
0.517*VLCD V0= 2.845 V0= 2.586 V0= 2.069 V0= 1.810 V0= 1.552 V0= 1.293 [V]
0.508*VLCD V0= 2.797 V0= 2.542 V0= 2.034 V0= 1.780 V0= 1.525 V0= 1.271 [V]
0.500*VLCD V0= 2.750 V0= 2.500 V0= 2.000 V0= 1.750 V0= 1.500 V0= 1.250 [V]
0.491*VLCD V0= 2.705 V0= 2.459 V0= 1.967 V0= 1.721 V0= 1.475 V0= 1.230 [V]
*In case EVR is used, please satisfy VLCD-V0 >0.6 V condition.
If this condition cannot be satisfied, IC output will be unstable.
*Do not use V0 < 2.5V area. If EVR is set to this area, IC operation will be unstable.
Prohibited setting
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