NCP1377_06 ONSEMI [ON Semiconductor], NCP1377_06 Datasheet
NCP1377_06
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NCP1377_06 Summary of contents
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NCP1377, NCP1377B PWM Current−Mode Controller for Free−Running Quasi−Resonant Operation The NCP1377 combines a true current mode modulator and a demagnetization detector which ensures full borderline/critical Conduction Mode in any load/line conditions together with minimum drain voltage switching (Quasi−Resonant operation). Due ...
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OVP and + Demag Universal Network *Please refer to the application information section. PIN FUNCTION DESCRIPTION Pin Symbol Function 1 Demag Core reset detection and OVP 2 FB Sets the peak current setpoint 3 CS Current sense input and skip ...
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HV PON 12.5 V 7.5 V 5.6 V (Fault) Fault To Internal Mngt. Supply GND MAXIMUM RATINGS Continuous Power Supply or Drive Voltage Transient Power Supply Voltage, Duration < 10 ms, I ...
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ELECTRICAL CHARACTERISTICS (For typical values T = 25°C, for min/max values T J Characteristic SUPPLY SECTION V Increasing Level at which the Current Source Turns−Off CC Minimum Operating Voltage after Turn−On V Decreasing Level at which the Latchoff Phase Ends ...
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TEMPERATURE (°C) Figure 3. V Threshold versus Temperature CCON 1.60 1.40 1.20 1.00 0.80 0.60 0.40 − TEMPERATURE (°C) Figure 5. Current Consumption (No Load) versus ...
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TEMPERATURE (°C) Figure 9. Drive Source Resistance versus Temperature 120 100 − TEMPERATURE (°C) Figure 11. Demagnetization Detection Threshold ...
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TEMPERATURE (°C) Figure 15. DMG Pin Internal Resistance versus Temperature APPLICATION INFORMATION INTRODUCTION The NCP1377 implements a standard current mode architecture where the switch−off time is dictated by the ...
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Once the power supply has started, the Vcc shall be constrained below 16 V, which is the maximum rating on pin 6. Figure 17 portrays a typical NCP1377 startup sequence with a Vcc regulated at 12.5 V. 13.5 12.5 V ...
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Drain Signal Timeout Signal Drain Signal Timeout Signal Figure 20. When the primary natural ringing becomes too low, the internal TimeOut together with the sense comparator initiates a new cycle when FB passes the skip level. Demagnetization Detection The core ...
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The NCP1377 demagnetization detection pad features a specific component arrangement as detailed by Figure 22. In this picture, the zener diodes network protect the IC against any potential ESD discharge that could appear on the pins. The first ESD diode ...
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Thermistor Rdem Figure 25. A simple arrangement triggers the latchoff as soon as the temperature exceeds a given setpoint. Shutting Off the NCP1377 Shutdown can easily be implemented through a simple ...
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Vcc ON Figure 28. Typical Waveforms in Short Circuit Conditions Soft−Start The NCP1377 features an internal 1.0 ms Soft−Start to soften the constraints occurring in the power supply during startup activated during the power on sequence. As soon ...
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Figure 29. This plot gathers waveforms captured at three different operating points Upper Plot: Free run, valley switching operation, Pout = Middle Plot: Min Toff clamps the switching frequency and selects the second valley. ...
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Latchoff Level Figure 31. The short−circuit protection forces the IC to enter burst ORDERING INFORMATION Device NCP1377DR2 NCP1377DR2G NCP1377BDR2 NCP1377BDR2G NCP1377D1R2G NCP1377BD1R2G NCP1377P NCP1377PG NCP1377BP NCP1377BPG †For information on tape and reel specifications, including part orientation and tape sizes, please ...
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0.25 (0.010 −Y− SEATING PLANE −Z− 0.25 (0.010 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor ...
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NOTE 2 C −T− N SEATING PLANE 0.13 (0.005 The product described herein (NCP1377), may be covered by one or more of the following ...