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V048F240M012 Datasheet(PDF) 10 Page - Vicor Corporation |
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V048F240M012 Datasheet(HTML) 10 Page - Vicor Corporation |
10 / 11 page vicorpower.com 800-735-6200 VTM™ Current Multiplier V048F240T012 Rev. 2.9 Page 10 of 11 Figure 18 — The PRM™ regulator controls the factorized bus voltage, VF, in proportion to output current to compensate for the output resistance, Ro, of the VTM™ current multipler. The VTM module output voltage is typically within 1% of the desired load voltage (VL) over all line and load conditions. +O ut –O ut +I n –I n VC P C T M I L VH P R N C S G S C O S N C C D L O A D VIN – In PC VC TM +In – Out +Out – Out +Out K Ro 0.01 mF 0.4 µH 10 Ω 10 k Ω PRM™ -AL Module VTM™ Module Factorized Bus (V F ) ROS RCD FPA™ Adaptive Loop In figures below; K = VTM™ current multiplier transformation ratio VF = PRM output (Factorized Bus Voltage) RO = VTM output resistance VO = VTM output VL = Desired load voltage Application Note (continued) + – + – VOUT COUT VIN V•I K + – + – CIN IOUT RC OUT IQ ROUT RC IN LIN = 5 nH 83 mA V•I Chip VTM™ Current Multiplier Level 2 Transient Behavioral Model for 48 V to 24 V, 12.5 A Figure 17 — This model characterizes the AC operation of the V•I Chip VTM including response to output load or input voltage transients or steady state modulations. The model enables estimates or simulations of input and output voltages under transient conditions, including response to a stepped load with or without external filtering elements. © 1/2 • IOUT 1/2 • VIN 43.6 mΩ RCIN 1.3 mΩ 3.44 nH 11.13 mΩ RCOUT 1 mΩ 7.7 µF L OUT = 1.1 nH 1.9 µF + – + VOUT VIN V•I K + – + – IOUT ROUT – IQ VTM™ Current Multiplier Level 1 DC Behavioral Model for 48 V to 24 V, 12.5 A Figure 16 — This model characterizes the DC operation of the V•I Chip VTM, including the converter transfer function and its losses. The model enables estimates or simulations of output voltage as a function of input voltage and output load, as well as total converter power dissipation or heat generation. © 43.6 mΩ 1/2 • VIN 1/2 • IOUT 83 mA |
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