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V048F080M030 Datasheet(PDF) 10 Page - Vicor Corporation |
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V048F080M030 Datasheet(HTML) 10 Page - Vicor Corporation |
10 / 11 page vicorpower.com 800-735-6200 V•I Chip Voltage Transformation Module V048F080T030 Rev. 2.2 Page 10 of 11 V•I Chip Voltage Transformation Module Figure 18 — The PRM controls the factorized bus voltage, Vf, in proportion to output current to compensate for the output resistance, Ro, of the VTM. The VTM output voltage is typically within 1% of the desired load voltage (VL) over all line and load conditions. -In PC VC TM +In -Out +Out VTM +Out -Out K Ro +Out –Out +In –In VC PC TM IL VH PR NC SG SC PRM-AL OS NC CD L O A D Factorized Bus (Vf) Vo = VL ± 1.0% (Io•Ro) K Vf = V L + K Vin ROS RCD FPA Adaptive Loop Figure 19 — An external error amplifier or Point-of-Load IC (POLIC) senses the load voltage and controls the PRM output – the Factorized Bus – as a function of output current, compensating for the output resistance of the VTM and for distribution resistance. +Out –Out +In –In VC PC TM IL VH PR NC SG SC PRM-AL OS NC CD -In PC VC TM +In -Out +Out VTM +Out -Out K Ro Remote Loop Control Vf = f (Vs) L O A D Factorized Power Bus Vo = VL ± 0.4% +S –S Vin FPA Non-isolated Remote Loop In figures below; K = VTM transformation ratio Vf = PRM output (Factorized Bus Voltage) RO = VTM output resistance VO = VTM output VL = Desired load voltage Application Note (continued) LIN = 5 nH + – + – VOUT COUT VIN V •I K + – + – CIN IOUT RCOUT IQ ROUT RCIN 67 mA V•I Chip VTM Level 2 Transient Behavioral Model for 48 V to 8 V, 30 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. © 1/6 • Iout 1/6 • Vin 7.5 mΩ RCIN 1.3 mΩ 0.7 nH 2.7 mΩ RCOUT 0.2 mΩ 48 µF LOUT = 1.6 nH 3.6 µF |
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