T520B157M004ASE040

POLYMER TANTALUM CHIP CAPACITORS KEMET ® ® COMPONENT PERFORMANCE CHARACTERISTICS ELECTRICAL 1. Operating Temperature Range • -55ºC to +105ºC Above 85ºC, the voltage rating is reduced linearly from 1.0 x rated voltage to 0.8 x rated voltage at 105ºC. 2. Non-Operating Temperature Range • -55ºC to +105ºC 3. Capacitance and Tolerance • 33µF to 1500µF • ±20% Tolerance Capacitance is measured at 120 Hz, up to 1.0 volt rms maximum and up to 2.5V DC maximum. DC bias causes only a small reduction in capacitance, up to about 2% when full rated voltage is applied. DC bias is not commonly used for room temperature measurements but is more commonly used when measuring at temperature extremes. Capacitance does decrease with increasing frequency, but not nearly as much or as quickly as standard tantalums. Figure 1 compares the frequency induced cap rolloff between the KO-CAP and traditional MnO2 types. Capacitance also increases with increasing temperature. See section 12 for temperature coefficients. Capacitance (uF) 150 100 MnO 2 50 0 10 Polymer 4. Voltage Ratings • 2V-16V DC Rated Voltage This is the maximum peak DC operating voltage from -55ºC to +85ºC for continuous duty. Above 85ºC, this voltage is derated linearly to 0.8 times the rated voltage for operation at 105ºC. • Surge Voltage Ratings Surge voltage is the maximum voltage to which the part can be subjected under transient conditions including the sum of peak AC ripple, DC bias and any transients. Surge voltage capability is demonstrated by application of 1000 cycles of the relevant voltage, at 25ºC, 85ºC or 105ºC. The parts are charged through a 33 ohm resistor for 30 seconds and then discharged through a 33 ohm resistor for 30 seconds for each cycle. • Voltage Ratings • Table 1 Rated Surge Derated Derated Voltage Voltage Voltage Surge Voltage -55ºC to +85ºC +105ºC 2V 2.6V 1.6V 2.1V 2.5V 3.3V 2.0V 2.8V 3V 3.9V 2.4V 3.1V 4V 5.2V 3.3V 4.3V 6.3V 8V 5V 6.5V 8V 10.4V 6.4V 8.7V 10V 13V 8V 10.4V 16V 20.8V 12.8V 16.6V 5. Reverse Voltage Rating & Polarity Polymer tantalum capacitors are polar devices and may be permanently damaged or destroyed if connected in the wrong polarity. The positive terminal is identified by a laser-marked stripe and may also include a beveled edge. These capacitors will withstand a small degree of transient voltage reversal for short periods as shown in the following table. Please note that these parts may not be operated continuously in reverse, even within these limits. Table 2 Temperature 25ºC 55ºC 85ºC 105ºC Permissible Transient Reverse Voltage 15% of Rated Voltage 10% of Rated Voltage 5% of Rated Voltage 3% of Rated Voltage 6. DC Leakage Current Because of the high conductivity of the polymer, the KO-CAP family has higher leakage currents than traditional MnO2 type Tantalum caps. The DC Leakage limits at 25ºC are calculated as 0.1 x C x V, where C is cap in µF and V is rated voltage in Volts. Limits for all part numbers are listed in the ratings tables. DC Leakage current is the current that flows through the capacitor dielectric after a five minute 1,000 100,000 10,000,000 charging period at rated voltage. Leakage is mea100 10,000 1,000,000 100,000,000 sured at 25ºC with full rated voltage applied to the Frequency (Hz) capacitor through a 1000 ohm resistor in series FIGURE 1 with the capacitor. KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300 33 Polymer Tantalum Surface Mount Introduction KEMET has developed a new type of tantalum capacitor that replaces the solid manganese dioxide electrode with a solid conductive polymer. This product is named the KO-CAP for KEMET Organic Capacitor. The basic families are the T520 and T530 series. A separate detail of performance characteristics is presented here as there are some differences between the polymer tantalums and the standard MnO2 types. Like all KEMET tantalum chips, these series are 100% screened for all electrical parameters: Capacitance @ 120 Hz, Dissipation Factor (DF) @ 120 Hz, ESR @ 100 kHZ and DC Leakage. It is also 100% surge current tested at full rated voltage through a low impedance circuit. The advantages of the polymer include very low ESR and elimination of the potentially catastrophic failure mode that may occur with standard tantalum capacitors in a high surge current application. Although the natural KO-CAP series failure mechanism is a short circuit, it does not exhibit an explosive failure mode. KEMET ® POLYMER TANTALUM CHIP CAPACITORS COMPONENT PERFORMANCE CHARACTERISTICS DC Leakage current does increase with temperature. The limits for 85ºC @ Rated Voltage and 105ºC @ 0.8 x Rated Voltage are both 10 times the 25ºC limit. 7. Surge Current Capability Certain applications may induce heavy surge currents when circuit impedance is very low (