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Mobilna Elektronika Praktyczna

Podzespoły  TPSM84A21 i TPSM84A22 - miniaturowe, 10-amperowe konwertery DC-DC 


Firma Texas Instruments wprowadziła do oferty nowe miniaturowe konwertery DC-DC step-down o obciążalności do 10 A. Są one oferowane w obudowie QFM-20 o wymiarach 15 mm×9 mm×2,3 mm. Znamionowe napięcie wejściowe wynosi 12 V a częstotliwością kluczowania 4 MHz, co pozwala na miniaturyzację elementów filtrujących.

Oba układy różnią się zakresem napięcia wyjściowego, które dla TPSM84A21 wynosi 0,55...1,35 V, natomiast dla TPSM84A22 1,2...2,05 V. Nowe konwertery zawierają cewki ekranowane, tranzystory kluczujące mocy, kondensatory wejściowe i wyjściowe oraz inne elementy pasywne, co ułatwia ich aplikację i zmniejsza liczbę współpracujących komponentów.

Tętnienia napięcia wyjściowego nie przekraczają 1% wartości ustawionego napięcia i to bez konieczności stosowania dodatkowych elementów filtrujących. Do ustalenia wartości napięcia jest wymagany pojedynczy rezystor. Dzięki wymienionym cechom kompletna przetwornica zajmuje na płytce przestrzeń o wymiarach 15 mm×11 mm×2,3 mm. Oba układy są wspierane przez Webench Power Designer.

Więcej na www.ti.com/product/TPSM84A21

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