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TPS40140RHHRG4 Datasheet(PDF) 62 Page - Texas Instruments |
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TPS40140RHHRG4 Datasheet(HTML) 62 Page - Texas Instruments |
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62 / 68 page  TPS40140 SLUS660I – SEPTEMBER 2005 – REVISED JANUARY 2015 www.ti.com 12 Device and Documentation Support 12.1 Device Support Table 9. Definition of Symbols PARAMETER DESCRIPTION VIN(min) Minimum operating input voltage VIN(max) Maximum operating input voltage VOUT Output voltage IRIPPLE Inductor peak-peak ripple current ITRAN(MAX) Maximum load transient VUNDER Output voltage undershot VOVER Output voltage overshot VRIPPLE(TotOUT) Total output ripple VRIPPLE(COUT) Output voltage ripple due to output capacitance VRIPPLE(CIN) Input voltage ripple due to input capacitance VRIPPLE(CinESR) Input voltage ripple due to the ESR of input capacitance Pswcond High-side MOSFET conduction loss Iswrms RMS current in the high-side MOSFET Rdson(sw) ON drain-source resistance of the high-side MOSFET Pswsw High-side MOSFET switching loss Ipk Peak current through the high-side MOSFET Rdrv Driver resistance of the high-side MOSFET Qgdsw Gate to drain charge of the high-side MOSFET Qgssw Gate to source charge of the high-side MOSFET Vgsw Gate drive voltage of the high-side MOSFET Pswgate Gate drive loss of the high-side MOSFET Qgsw Gate charge of the high-side MOSFET Pswtot Total losses of the high-side MOSFET Psrcond Low-side MOSFET conduction loss Isrrms RMS current in the low-side MOSFET Rdson(sr) ON drain-source resistance of the low-side MOSFET Psrgate Gate drive loss of the low-side MOSFET Qgsr Gate charge of the low-side MOSFET Vgsr Gate drive voltage of the low-side MOSFET Pdiode Power loss in the diode td Dead time between the conduction of high- and low-side MOSFET V f Forward voltage drop of the body diode of the low-side MOSFET Psrtot Total losses of the low-side MOSFET DCR Inductor DC resistance Ac The gain of the current sensing amplifier, typically 13 ROUT Output load resistance Vramp Ramp amplitude, typically 0.5 V T Switching period Gvc(s) Control to output transfer function Gc(s) Compensator transfer function Tv(s) Loop gain transfer function Acm Gain of the compensator f p The pole frequency of the compensator f z The zero frequency of the compensator 62 Submit Documentation Feedback Copyright © 2005–2015, Texas Instruments Incorporated Product Folder Links: TPS40140 |
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