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TAP226050 Datasheet(PDF) 8 Page - AVX Corporation |
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TAP226050 Datasheet(HTML) 8 Page - AVX Corporation |
8 / 16 page 150 ■ MAY 2013 SECTION 1: ELECTRICAL CHARACTERISTICS AND EXPLANATION OF TERMS 1.1 CAPACITANCE 1.1.1 Rated capacitance (CR) This is the nominal rated capacitance. For tantalum capaci- tors it is measured as the capacitance of the equivalent series circuit at 20°C in a measuring bridge supplied by a 120 Hz source free of harmonics with 2.2V DC bias max. 1.1.2 Temperature dependence on the capacitance The capacitance of a tantalum capacitor varies with temper- ature. This variation itself is dependent to a small extent on the rated voltage and capacitor size. See graph below for typical capacitance changes with temperature. 1.1.3 Capacitance tolerance This is the permissible variation of the actual value of the capacitance from the rated value. 1.1.4 Frequency dependence of the capacitance The effective capacitance decreases as frequency increases. Beyond 100 kHz the capacitance continues to drop until res- onance is reached (typically between 0.5-5 MHz depending on the rating). Beyond this the device becomes inductive. Typical Capacitance vs. Temperature 15 10 5 0 -5 -10 -15 Temperature ( °C) -55 -25 0 25 50 75 100 125 1.0 F 35V 1.4 1.2 1.0 0.8 0.6 0.4 100Hz 1kHz 10kHz 100kHz Frequency 1.2 VOLTAGE 1.2.1 Rated DC voltage (VR) This is the rated DC voltage for continuous operation up to +85°C. 1.2.2 Category voltage (VC) This is the maximum voltage that may be applied continu- ously to a capacitor. It is equal to the rated voltage up to +85°C, beyond which it is subject to a linear derating, to 2/3 VR at 125°C. 1.2.3 Surge voltage (VS) This is the highest voltage that may be applied to a capaci- tor for short periods of time. The surge voltage may be applied up to 10 times in an hour for periods of up to 30 seconds at a time. The surge voltage must not be used as a parameter in the design of circuits in which, in the normal course of operation, the capacitor is periodically charged and discharged. 100 90 80 70 60 50 75 85 95 105 115 125 Temperature °C TAP/TEP Technical Summary and Application Guidelines Typical Curve Capacitance vs. Frequency Category Voltage vs. Temperature |
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