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MB3782PF Datasheet(PDF) 8 Page - Fujitsu Component Limited. |
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MB3782PF Datasheet(HTML) 8 Page - Fujitsu Component Limited. |
8 / 28 page 8 MB3782 s SETTING OUTPUT VOLTAGE The following diagrams show the connections used to set the output voltage. Because the power supply to the error amps is provided by the same reference voltage circuit used for the other internal circuits, the common-mode input voltage range is set at 1.05 V to 1.45 V. The reference voltage input to the +IN and -IN pins should be set at 1.25 V (VREF/2). The method of connection for channel 1 is different from channel 2 and channel 3. In addition, channel 1 is capable of picking up both positive and negative voltages, while channel 2 and channel 3 can pick up only positive output voltages. RNF R2 R + – R1 R VREF V0 + V0 + = 2·R2 VREF · (R1 + R2) pin 6 Figure 1 Error amp (channel 1) connection: Output voltage VO positive RNF R2 R + – R1 R VREF V0 – = – 2·R2 VREF · (R1 + R2) + VREF pin 6 V0 – Figure 2 Error amp (channel 1) connection: Output voltage VO positive |
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