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MAL219622474E3 Datasheet(PDF) 5 Page - Vishay Siliconix |
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MAL219622474E3 Datasheet(HTML) 5 Page - Vishay Siliconix |
5 / 7 page www.vishay.com For technical questions contact: aluminumcaps1@vishay.com Document Number: 28362 166 Revision: 15-Apr-08 196 DLC Vishay BCcomponents Double Layer Capacitors DISCHARGE CHARACTERISTICS Backup time of 196 DLC series capacitors depends on minimum memory holding voltage and discharge current (corresponding with the current consumption of the load). For minimum backup times of standard and vertical miniaturized series see Figs 9 and 10 (charging time ≥ 24 hours). Figure 11 shows the backup time when a 196 DLC capacitor is discharged by a constant resistance (charging time ≥ 24 hours). The horizontal axis shows the initial value of discharge current if 5 V is connected to the capacitor via a fixed series resistor. EXAMPLE: 1 µA CORRESPONDS TO 5 M Ω AND 0.1 µA CORRESPONDS TO 50 M Ω The vertical axis shows that period of time during which the voltage drops from 5 to 2 V. Fig.9 Typical backup time as a function of discharge current 10 MGA695 1 105 104 10 3 10 2 10 backup time (s) discharge current (mA) 10 -3 10 -2 10 -1 5 4 3 2 1 Curve 1: 1.0 F, 5.5 V Curve 2: 0.47 F, 5.5 V Curve 3: 0.22 F, 5.5 V Curve 4: 0.1 F, 5.5 V Curve 5: 0.047 F, 5.5 V Voltage drop from 5.0 to 3.5 V Fig.10 Typical backup time as a function of discharge current 10 1 106 105 10 4 10 3 10 4 backup time (s) discharge current (mA) 10 -3 10 -2 10 -1 MGA696 5 4 3 2 1 Curve 1: 1.0 F, 5.5 V Curve 2: 0.47 F, 5.5 V Curve 3: 0.22 F, 5.5 V Curve 4: 0.1 F, 5.5 V Curve 5: 0.047 F, 5.5 V Voltage drop: from 5.0 to 2.0 V Fig.11 Typical backup time as a function of initial discharge current 10 3 10 10 2 103 10 2 10 1 backup time (s) initial value discharge current (mA) 10 -2 10 -1 1 MLB203 1 2 3 4 5 Curve 1: 1.0 F, 5.5 V Curve 2: 0.47 F, 5.5 V Curve 3: 0.22 F, 5.5 V Curve 4: 0.1 F, 5.5 V Curve 5: 0.047 F, 5.5 V Voltage drop from 5.0 to 2.0 V by means of a fixed resistor |
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