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NCP1239 Datasheet(PDF) 5 Page - ON Semiconductor |
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NCP1239 Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 38 page NCP1239 http://onsemi.com 5 ELECTRICAL CHARACTERISTICS (For typical values TJ = 25°C, for min/max values TJ = 0°C to +125°C, Vpin16 = 48 V, VCC = 20 V unless otherwise noted.) Symbol Unit Max Typ Min Pin Rating Soft−Start and Timer Ich Soft−Start or Jittering charge current @ Vpin6 = 2.4 V 6 60 95 110 mA Idisch Jittering Discharge Current @ Vpin6 = 2.4 V 6 77 107 137 mA Vjitter Jittering Saw−Tooth Lower Threshold 6 1.67 1.80 1.89 V VjitterH Jittering Saw−Tooth Upper Threshold 6 2.85 3.00 3.20 V VtimerL Timer Peak Threshold 6 4.0 4.3 4.6 V ItimerC Timer Charge Current @ Vpin6 = 3.5 V and Pin 8 open 6 3.9 5.2 6.4 mA ItimerD Timer Discharge Current @ Vpin6 = 3.5 V and Pin 8 open 6 − 400 − mA Feedback Section Rup Internal Pullup Resistor 8 − 20 − k W Ifb Source Current @ Vpin8 = 0.5 V 8 − 200 − mA Iratio Pin 8 to current Setpoint division ratio − − 3.0 − − Internal Ramp Compensation Rramp Internal Resistor 10 − 32 − k W Vramp Internal Saw−Tooth Amplitude 10 − 3.2 − V Skipping Mode and Standby Management Rgts Pin 1 output impedance in standby state (Pin 8 grounded, Vpin6 > 4.5 V) @ VCC = 12.5 V 1 4.0 8.0 18 k W Igts Sink Current Source in Normal Mode @ Vpin8 = 2 V, Pin 7 open @ VCC − Vpin1=0.7 V 1 0.6 1.0 − mA FB−skip Default Feedback Level for Skip−Cycle Operation and Standby Detection 7 380 430 480 mV FB_stby−out Default Feedback Level to Leave Standby 7 650 740 810 mV Vstby−out/Vskip Ratio leave standby Setpoint to skip−cycle Setpoint 1.5 1.7 1.9 − Rpin7 Internal Pin 7 Impedance 7 − 110 − k W Pin 7 to Skipping Setpoint ratio − 3.0 − − Brown−Out Detection BOthH Brown−Out Detection Upper Threshold 5 0.45 0.50 0.55 V BOthL Brown−Out Detection Low Threshold 5 0.20 0.24 0.28 V BOhyst Brown−Out Hysteresis 5 0.20 0.26 0.30 V Protections TSD Thermal Shutdown: Thermal Shutdown Threshold Hysteresis 140 30 °C Vfault Fault Detection Threshold 3 2.2 2.4 2.6 V ORDERING INFORMATION Device Package Shipping† NCP1239FDR2 SOIC−16 2500 / Tape & Reel NCP1239FDR2G SOIC−16 (Pb−Free) 2500 / Tape & Reel NCP1239VDR2 SOIC−16 2500 / Tape & Reel NCP1239VDR2G SOIC−16 (Pb−Free) 2500 / Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. |
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