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TPS54614-EP Fiches technique(PDF) 9 Page - Texas Instruments |
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TPS54614-EP Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 22 page www.ti.com APPLICATION INFORMATION 13 12 7 8 6 BOOT 5 9 10 11 14 15 16 17 18 PH PH PH PH PH PH PH PH PH 19 PGND PGND PGND PGND PGND PwrPad AGND NC RT SS/ENA VIN 20 22 24 VBIAS 27 26 4 2 1 0.047 µF 7.2 µH 680 µF VO 1.8 V 10 k Ω Enable 0.1 µF VI 3 V − 6 V 21 23 28 25 3 10 µF 220 µF VIN VIN VIN VIN VSENSE PWRGD FSEL PwrGood CSS COMPONENT SELECTION INPUT FILTER FEEDBACK CIRCUIT OPERATING FREQUENCY R + 500 kHz SwitchingFrequency 100 kW (1) TPS54611-EP, TPS54612-EP TPS54613-EP, TPS54614-EP TPS54615-EP, TPS54616-EP SGLS293A – FEBRUARY 2005 – REVISED AUGUST 2005 Figure 10 shows the schematic diagram for a typical TPS54614 application. The TPS54614 (U1) can provide greater than 6 A of output current at a nominal output voltage of 1.8 V. For proper operation, the exposed thermal PowerPAD underneath the integrated circuit package needs to be soldered to the printed-circuit board. Figure 10. Application Circuit The values for the components used in this design example were selected using the SWIFT designer software tool. SWIFT designer provides a complete design environment for developing dc-dc converters using the TPS54614, or other devices in the SWIFT product family. Additional design information is available at www.ti.com. The input to the circuit is a nominal 3.3 VDC or 5 VDC. The input filter is a 220-µF POSCAP capacitor, with a maximum allowable ripple current of 3 A. A 10-µF ceramic capacitor for the TPS54614 is required, and must be located as close as possible to the device. The output voltage of the converter is fed directly into the VSENSE pin of the TPS54614. The TPS54614 is internally compensated to provide stability of the output under varying line and load conditions. In the application circuit, 350 kHz operation is selected by leaving FSEL open. Different operating frequencies can be selected by connecting a resistor between RT pin and AGND. Choose the value of R using Equation 1 for the desired operating frequency: Alternately, a preset operating frequency of 550 kHz can be selected by leaving RT open and connecting the FSEL pin to VI. 9 |
Numéro de pièce similaire - TPS54614-EP |
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Description similaire - TPS54614-EP |
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