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LM5080MM Datasheet(PDF) 8 Page - National Semiconductor (TI) |
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LM5080MM Datasheet(HTML) 8 Page - National Semiconductor (TI) |
8 / 13 page Reference Adjustment Operation Mode (Continued) voltage reference and feedback divider which do not require a fast response. In some systems a small resistor (RTRO) in series with CTRO can improve stability by introducing a zero at high frequencies to increase the phase margin of the current share loop. It is essential that the VCC pins of all LM5080’s be tied to the same point in this mode. Any mismatch in the VCC voltages between LM5080’s will significantly contribute to current share errors. The current sense resistors should be located as close to the load as possible to minimize trace resistance in series with the sense resistors which can also contribute to sharing errors. In this mode, the best accuracy will be achieved with lower VCC values since any mismatch in the gain resistors internal to the LM5080 will affect the current share accuracy. The effective output current from the TRO pin can be multi- plied to increase the current share loop gain if necessary. R1 should be at least 10k Ω. 20157804 FIGURE 1. Reference Adjust Mode Implementation 20157805 FIGURE 2. LM5080 Showing the RSO Buffer Configured to Boost Transconductance www.national.com 8 |
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