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LM5171 Datasheet(PDF) 67 Page - Texas Instruments |
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LM5171 Datasheet(HTML) 67 Page - Texas Instruments |
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67 / 89 page  Frequency (Hz) Power Plant Compensation Total Loop Figure 8-17. Bode Plots of the Current Loop For buck mode, select the voltage loop crossover frequency at 1/10 of the current loop crossover frequency. According to Equation 110, the compensation network for the voltage current loop is determined by: RLCOMP= RLFBT Kdc_BK× 1+2i×π×fCV ωZ_vl 1+2i×π×fCV ωZ_il ×KISET = 26.7kΩ 0.4Ω 40×1mΩ× 1+2i×π×1.5kHz 250kHz 1+2i×π×1.5kHz 6.25kHz ×0.8 =6.1kΩ CLCOMP= 1 2i×π×fCV5×RCOMP = 1 2i×π×1.5kHz5×6.1kΩ =86nF CLHF= 1 2i×π×10×fCV×RCOMP =1.7nF (110) Selecting the closest standard values for the compensation network, namely, RLCOMP = 6.2kΩ CCOMP1 = 100nF CHF1 = 1.5nF Figure 8-18 shows the bode plots of the power plant Gvs_BK(s), the voltage loop compensation gain Gcv(s) , and the resulting total open loop gain Tvs_BK(s). www.ti.com LM5171-Q1 SNVSC75B – APRIL 2023 – REVISED SEPTEMBER 2025 Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 67 Product Folder Links: LM5171-Q1 |
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