NCP1217P100 ON Semiconductor, NCP1217P100 Datasheet
NCP1217P100
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NCP1217P100 Summary of contents
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NCP1217, NCP1217A Enhanced PWM Current- - Mode Controller for High- -Power Universal Off- -Line Supplies Housed PDIP- -7 package, the NCP1217 represents the enhanced version of the NCP1203- -based controllers. Due to its high drive ...
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EMI FILTER UNIVERSAL INPUT PIN FUNCTION DESCRIPTION Pin No. Pin Name Function 1 Adj Adjust the skipping peak current 2 FB Sets the peak current setpoint 3 CS Current sense input 4 GND The IC ground 5 Drv Driving pulses ...
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Adj 1 Current Sense 250 ns 3 L.E. Ramp Compensation Ground V REF Available for “A” version only MAXIMUM RATINGS ...
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ELECTRICAL CHARACTERISTICS unless otherwise noted.) CC Characteristic SUPPLY SECTION (All frequency versions, unless otherwise noted) Turn--On Threshold Level, V Going Up CC Minimum Operating Voltage After Turn--On V Decreasing Level at which the Latchoff Phase Ends ...
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ELECTRICAL CHARACTERISTICS (continued) Max T = 150 unless otherwise noted Characteristic FEEDBACK SECTION ( Pin 5 Loaded by 1.0 kΩ) CC Internal Pull--Up Resistor Pin 2 (FB) to Internal Current Setpoint ...
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TYPICAL CHARACTERISTICS (continued) 150 133 kHz 130 110 100 kHz 90 65 kHz TEMPERATURE (C) Figure 7. Switching Frequency vs. Temperature 500 450 400 350 300 250 200 -- TEMPERATURE (C) Figure 9. ...
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TYPICAL CHARACTERISTICS (continued) 1.20 1.15 1.10 1.05 1.00 -- TEMPERATURE (C) Figure 13. Skip Mode Level vs. Temperature 8.0 7.0 6.0 5.0 4.0 3.0 --50 3.10 3.05 3.00 2.95 2.90 2.85 2.80 2.75 2.70 100 150 --50 Figure ...
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... Due to its high- -voltage current source, ON Semiconductor’s NCP1217 does not need an external startup resistance but supplies the startup current directly from the high- -voltage rail. On the other hand, more and more applications are requiring low no- -load standby power, e ...
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Startup Sequence When the power supply is first powered from the mains outlet, the internal current source (typically 7.0 mA) is biased and charges up the V capacitor. When the voltage CC on this V capacitor reaches the VCC CC ...
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VCC = 12 Figure 18. Typical Waveforms in Short Circuit Conditions Calculating the V Capacitor CC The V capacitor can be calculated knowing the IC CC consumption as soon as V reaches 12.8 V. Suppose that a CC ...
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Figure 20. Output Pulses at Various Power Levels (X = 5.0 ms/div) P1 < P2 < P3 300 M 200 M 100 M 0 315.40 U Figure 21. The Skip Cycle Takes Place at Low Peak Currents which Guarantees Noise- ...
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... IC as soon Vadj goes CC above the latching level (typical 3.1 V). Figure 23 shows Rcomp how to wire the bipolar transistor to activate the latchoff. A typical candidate for Q1 could be an MMBT3906 from ON Semiconductor. Rsense Off or when 37 mV∕ms Figure 23. A Simple Bipolar Transistor Totally ...
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V CC VCC = 12 VCC = 7.6 V min VCC = 5.6 V latch Drv Adj Figure 24. When Vadj is Pulled Above 3.1 V, NCP1217 Permanently Latches- -Off the Output Pulses In normal operation, the Adj ...
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Q1 ON/OFF Figure 26. Another Way of Shutting Down the IC Without a Definitive Latchoff State Protecting the Controller Against Negative Spikes As with any controller built upon a CMOS technology the designer’s duty to avoid the presence ...
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Vcc 5 V/DIV Vlatch 1 V/DIV Time 10 ms/DIV Figure 27. A Negative Spike Takes Place on the Bulk Capacitor at the Switch- -Off Sequence Simple and inexpensive cures exist to prevent from internal parasitic SCR activation. One of them ...
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Soft- -Start (NCP1217A only) The NCP1217A features an internal 1.0 ms soft- -start activated during the power on sequence (PON). As soon as V reaches VCC , the peak current is gradually CC OFF increased from nearly zero up to ...
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... ORDERING INFORMATION Device NCP1217D65R2G NCP1217D100R2G NCP1217D133R2G NCP1217P65G NCP1217P100G NCP1217P133G NCP1217AD65R2G NCP1217AD100R2G NCP1217AD133R2G NCP1217AP65G NCP1217AP100G NCP1217AP133G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Version Marking 65 kHz 17D06 ...
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... S B 0.25 (0.010 - SEATING PLANE - - 0.25 (0.010 *For additional information on our Pb--Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. PACKAGE DIMENSIONS SOIC CASE 751--07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1.52 0.060 7.0 4.0 0.275 ...
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... Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303--675--2175 or 800--344--3860 Toll Free USA/Canada Fax: 303--675--2176 or 800--344--3867 Toll Free USA/Canada Email: orderlit@onsemi ...