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MIC45404 Arkusz danych(PDF) 18 Page - Microchip Technology |
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MIC45404 Arkusz danych(HTML) 18 Page - Microchip Technology |
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18 / 32 page ![]() MIC45404 DS20005478A-page 18 2015 Microchip Technology Inc. Figure 4-2 illustrates the Hiccup mode short-circuit pro- tection logic flow. Note that Hiccup mode short-circuit protection is active at all times, including the soft start ramp. FIGURE 4-2: Hiccup Mode Short-Circuit Protection Logic. START CLEAR LS OC EVENTS COUNTER CLOCK PULSE (MARKING HS TURN-OFF, LS TURN-ON) IDLE LOOP IN NORMAL OPERATION LS OC EVENT DETECTED? EVENT COUNTER = 0 DECREMENT EVENT COUNTER EVENT COUNTER FULL? INCREMENT EVENT COUNTER INITIATE HICCUP SEQUENCE STOP SWITCHING HS AND LS CYCLE THREE TIMES INTERNAL SOFT START CAPACITOR CLEAR LS OC EVENTS COUNTER INITIATE SOFT START ENABLE SWITCHING YES YES YES NO NO NO |
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