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TK70403M Datasheet(PDF) 8 Page - TOKO, Inc |
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TK70403M Datasheet(HTML) 8 Page - TOKO, Inc |
8 / 10 page Page 8 January 1999 TOKO, Inc. TK70403 The range of usable currents can also be found from the graph below. Procedure: 1) Find P D 2) P D1 is taken to be PD x (~ 0.8 - 0.9) 3) Plot P D1 against 25 °C 4) Connect P D1 to the point corresponding to the 150 °C with a straight line. 5) In design, take a vertical line from the maximum operating temperature (e.g., 75 °C) to the derating curve. 6) Read off the value of P D against the point at which the vertical line intersects the derating curve. This is taken as the maximum power dissipation, D PD. The maximum operating current is: I OUT = (DPD / (VIN(MAX) - VOUT) 0 50 100 150 TA (°C) 0 250 450 50 150 350 MOUNTED AS SHOWN FREE AIR SOT-26 POWER DISSIPATION CURVE PD DPD 25 50 75 150 (mW) TA (°C) 3 6 5 4 DEFINITION AND EXPLANATION OF TECHNICAL TERMS (CONT.) |
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