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NCP1129BP100G Datasheet(PDF) 6 Page - ON Semiconductor |
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NCP1129BP100G Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 18 page NCP1124, NCP1126, NCP1129 www.onsemi.com 6 Table 5. ELECTRICAL CHARACTERISTICS (VCC = 12 V, for typical values TJ = 25_C, for min/max values, TJ is –40_C to 125_C, unless otherwise noted) Characteristics Unit Max Typ Min Symbol Conditions FEEDBACK SECTION Internal Pull−up Resistor Rup – 13 – k W Equivalent ac resistor from FB to GND Req – 15 – k W VFB to Internal Current Setpoint Division Ratio Iratio – 4 – – Feedback Voltage Below Which the Peak Current is Frozen VFB(freeze) 0.85 1 1.15 V FREQUENCY FOLDBACK Frequency Foldback Level on the FB 47% of maximum peak current VFB(fold) 1.35 1.5 1.78 V Transition Frequency Below Which Skip−Cycle occurs ftrans 22 26 30 kHz Feedback voltage level when Frequency Foldback ends fSW = fMIN VFB(fold,end) 410 450 490 mV Skip−Cycle Level Voltage on The FB pin Vskip 360 400 440 mV Hysteresis on The Skip Comparator Vskip(HYS) – 40 – mV FAULT PROTECTION Soft−Start Period Measured from 1st drive pulse to VCS = VILIM tSSTART – 4.0 – ms Overload Fault Timer VCS = VILIM tOVLD 35 50 65 ms TEMPERATURE MANAGEMENT Temperature Shutdown (Note 9) TSD 130 − – _C Hysteresis Guaranteed by Design – 20 – _C Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. 9. The value is not subjected to production test − verified by design/characterization. The thermal shutdown temperature refers to the junction temperature of the controller. |
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