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LTC4361IDC-1-TRPBF Datasheet(PDF) 11 Page - Linear Technology |
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LTC4361IDC-1-TRPBF Datasheet(HTML) 11 Page - Linear Technology |
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11 / 16 page  LTC4361-1/LTC4361-2 11 436112f APPLICATIONS INFORMATION Figure 4. 20V Hot-Plug into a 10μF Capacitor Figure 5. 20V Hot-Plug into the LTC4361 + LOAD 436112 F04a MOBILE DEVICE WALL ADAPTOR AC/DC COUT IN LIN RIN CABLE ICABLE VIN 10V/DIV ICABLE 20A/DIV 5μs/DIV 436112 F04b RIN = 150mΩ, LIN = 0.7μH LOAD = 10Ω, COUT = 10μF + LOAD LTC4361 M1 Si1470DH GATE GND 436112 F05a MOBILE DEVICE WALL ADAPTOR AC/DC COUT SENSE OUT IN IN OUT LIN RIN RSENSE CABLE ICABLE VIN 10V/DIV VOUT 1V/DIV ICABLE 20A/DIV 5μs/DIV 436112 F05b RIN = 150mΩ, LIN = 0.7μH, RSENSE = 25mΩ LOAD = 10Ω, COUT = 10μF Input Transients Figure 4 shows a typical setup when an AC wall adaptor charges a mobile device. The inductor LIN represents the lumped equivalent inductance of the cable and the EMI filter found in some wall adaptors. RIN is the lumped equivalent resistance of the cable, adaptor output capacitor ESR and the connector contact resistance. LIN and RIN form an LC tank circuit with any capacitance at IN. If the wall adaptor is powered up first, plugging the wall adaptor output to IN does the equivalent of applying a voltage step to this LC circuit. The resultant voltage overshoot at IN can rise to twice the DC output voltage of the wall adaptor as shown in Figure 4. Figure 5 shows the 20V adaptor output applied to the LTC4361. Due to the low capacitance at the IN pin, the plug-in transient has been brought down to a manageable level. |
Similar Part No. - LTC4361IDC-1-TRPBF |
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Similar Description - LTC4361IDC-1-TRPBF |
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