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MC34280FTBR2 Arkusz danych(PDF) 7 Page - ON Semiconductor |
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MC34280FTBR2 Arkusz danych(HTML) 7 Page - ON Semiconductor |
7 / 20 page MC34280 http://onsemi.com 7 DYNAMIC ELECTRICAL CHARACTERISTICS (Refer to TIMING DIAGRAMS, TA = 0 to 70°C unless otherwise noted.) Rating Symbol Min Typ Max Unit Minimum PORB to Control delay tPORC 500 nS Minimum VAUXCON pulse HIGH width tCW 5.0 µS Minimum VAUXCON pulse LOW width tCC 8.0 µS Minimum VAUXADJ to VAUXCON delay tCL 1.0 µS Minimum VAUXADJ pulse HIGH width tJW 1.0 µS Minimum VAUXADJ pulse LOW width tJC 1.0 µS Minimum VAUXCON LOW to VAUXADJ pulse delay1 tJL 1.0 µS Minimum hold time of VAUXADJ for Reset VAUXREF tRJL 500 nS Minimum VAUXADJ pulse HIGH width for Reset VAUXREF tRW 1.0 µS Minimum hold time of VAUXADJ for Decrement VAUXREF tDL 500 nS Minimum VAUXADJ pulse HIGH width for Decrement VAUXREF tDW 1.0 µS NOTE: 1. For not resetting VAUXREF. TYPICAL ELECTRICAL CHARACTERISTICS 1 80% 1 90% 1 80% 0 90% VIN, INPUT VOLTAGE (V) VIN, INPUT VOLTAGE (V) IOUT_AUX, AUX OUTPUT CURRENT (mA) Figure 6. Efficiency of VMAIN versus Output Current (VMAIN = 3.3 V, L = 33 uH, Various VIN) IOUT_MAIN, MAIN OUTPUT CURRENT (mA) Figure 7. Efficiency of VMAIN versus Input Voltage (VMAIN = 3.3 V, L1 = 33 uH, Various IOUT) Figure 8. Efficiency of VAUX versus Output Current (VAUX = 25 V, L2 = 33 uH, Various VIN) Figure 9. Efficiency of VAUX versus Input Voltage (VAUX = 25 V, L2 = 33 uH, Various IOUT) 85% 80% 75% 70% 50 100 150 200 250 300 85% 80% 75% 70% 1.5 2 3 75% 70% 65% 60% 55% 50% 35 7 11 13 15 75% 70% 65% 60% 55% 50% 1.5 2 2.5 3 2.5 9 Vin = 3V Vin = 1.8V Vin = 1.5V Vin = 1V Iout = 10mA Iout = 60mA Iout = 100mA Iout = 150mA Iout = 200mA X X X X Iout = 1mA Iout = 5mA Iout = 10mA Iout = 15mA Vin = 3V Vin = 1.8V Vin = 1.5V Vin = 1V |
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