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AN007 Datasheet(PDF) 7 Page - Analog Intergrations Corporation |
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AN007 Datasheet(HTML) 7 Page - Analog Intergrations Corporation |
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7 / 11 page  AN007 7 The bulk filter capacitor values are generally determined by the ESR(effective series resistance) and ESL (effective series inductance) parameters rather than actual capacitance. High frequency decoupling capacitors Should be placed as close to the power pins of the load as physically possible. Be careful not to add inductance in the circuit board wiring that could cancel the usefulness of these low inductance component, use only specialized low-ESR capacitors intended for switching regulator applications for the bulk capacitors. The bulk capacitor’s ESR determines the output ripple voltage and the initial voltage drop after a high slew-rate transient. An aluminum electrolytic capacitor’s ESR value is related to the case size with lower ESR available in larger case sizes. (4) PWM Output Inductor Selection The output inductor is selected to meet the output voltage ripple requirements and sets the converter’s response time to a load transient. The inductor value determines the converter’s ripple current and the ripple voltage is a function of the ripple current. The ripple voltage and current are approximate by the following equation : ΔI= O S OUT IN L F V V − × IN OUT V V , ΔVOUT=ΔI ×ESR Increasing the value of inductance reduces the ripple current and converter’s response time to a load transient. 1. Efficiency Test: Input Voltage Input Current Output Voltage Output Current Output Load Efficiency 10V 290 mA 5.06V 503mA 500mA 87.8 % 10V 570 mA 5.06V 1003 mA 1A 89.0 % 10V 1149 mA 5.05V 2001 mA 2A 87.9 % 10V 1754 mA 5.05V 3001 mA 3A 86.4 % 12V 252 mA 5.06V 503mA 500mA 84.2 % 12V 489 mA 5.06V 1003 mA 1A 86.5 % 12V 979 mA 5.05V 2001 mA 2A 86.1 % 12V 1491 mA 5.06V 3001 mA 3A 84.9 % 14V 217 mA 5.09V 503mA 500mA 84.3 % 14V 419 mA 5.09V 1003 mA 1A 87.0 % 14V 836 mA 5.08V 2001 mA 2A 86.9% 14V 1271 mA 5.07V 3001 mA 3A 85.5 % |
Similar Part No. - AN007 |
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Similar Description - AN007 |
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