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| TND307 Graphical Data Test Circuits for the NCP1650 Prepared by Alan Ball ON Semiconductor Applications Engineering http://onsemi.com The following circuits are the test configurations that were used to obtain the data for the graphical section of the NCP1650/D data sheet. Each graph has a schematic associated with it and in some cases a description of the procedure. 14 V 1 mF 300 0 to -5 V Iavg Iavg fltr 10 11 1 nF 0-5 V 0-5 V 10 1k APPLICATION NOTE 30 k 0.5 mF 0-5 V 0.1 mF 47 k Ramp GND CT Comp 15 k 15 14 13 10 k 470 pF 47 k 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax 2 0.1 mF Vref NCP1650 16 Output 12 IS- 30 k 0.05 mF Ramp GND CT Comp 15 14 13 10 k 470 pF 47 k 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF Figure 1. Power Multiplier Family of Curves Re: NCP1650/D data sheet, Figure 3 Figure 2. Reference Multiplier Family of Curves Re: NCP1650/D data sheet, Figure 4 Power up chip. Set IS- between 0 and -200 mV in 50 mV increments. For each value of IS- set the ac input (pin 5) to various values from 0 to 3.8 volts. Record output Pmax (pin 9). (c) Semiconductor Components Industries, LLC, 2002 1 NCP1650 March, 2002 - Rev.0 Publication Order Number: TND307/D TND307 14 V 1 mF 14 V 1 mF 30 k 3.3 k 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax NCP1650 GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 30 k 3.3 k 10 k Ramp CT Comp 14 13 47 k CT 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 Freq Cntr 10 k Ramp CT Comp 14 13 47 k CT NCP1650 Freq Cntr Figure 3. Frequency versus CT Re: NCP1650/D data sheet, Figure 5 Figure 4. Ramp Peak versus Frequency Re: NCP1650/D data sheet, Figure 6 Bias device per the above figure. Install various values of CT, and measure the frequency at pin 13. Do not measure directly from pin 14, as the impedance of the measuring device will cause errors in the reading. Bias device per the above figure. Install various values of CT, and measure the frequency at pin 13. Measure amplitude at pin 14 with an oscilloscope. 3 4 5 6 2.5 V 7 8 Pcomp 9 Pmax GND 15 1 Vin AC Comp Ref Filter AC Input FB/SD Loop Comp 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF 30 k NCP1650 NCP1650 0-5 V 3.3 k Ramp CT Comp 14 13 47 k CT 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 470 pF 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF CL 3.3 k 10 k Ramp CT Comp 14 13 47 k Figure 5. Max Duty Cycle versus Frequency Re: NCP1650/D data sheet, Figure 7 Figure 6. Drive Rise and Fall Time versus Capacitance Re: NCP1650/D data sheet, Figure 8 Measure frequency and duty cycle for various values of CT. Adjust the voltage on pin 3 for approximately 50% duty cycle from the output driver. Measure the waveform on pin 16 with an oscilloscope and measure the rise and fall times at the 10% and 90% levels. Change CL as required. http://onsemi.com 2 TND307 14 V 1 mF 300 0 to -5 V 1.5 V 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 470 pF 2 Vref 16 Output 12 IS- 10 Iavg 11 Iavg fltr 650 0.1 mF 14 V 1 mF 30 k 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 1 nF NCP1650 0.05 mF 0.1 mF 47 k Ramp GND CT Comp 15 14 13 10 k 470 pF 10 k 15 k 10 3.3 k Ramp CT Comp 14 13 47 k Figure 7. Current Sense Amplifier Gain Re: NCP1650/D data sheet, Figure 9 Figure 8. Vref, Transient Response Re: NCP1650/D data sheet, Figure 11 Adjust voltage at pin 12, and read values at pins 10 & 11. 9 0-5 V V 1k 1.5 V V Pmax 6 FB/SD 5 AC Input 7 Loop Comp 3 AC Comp 4 Ref Filter 8 Pcomp GND 15 NCP1650 1 Vin 2 0.1 mF Vref 16 Output 12 IS- 10 Iavg 11 14 V 1 mF NCP1650 0-5 V V V 1k 1.5 V Iavg fltr Ramp CT Comp 14 13 47 k 3.3 k 1 Vin 6 FB/SD 9 Pmax 5 AC Input 8 Pcomp 3 AC Comp 4 Ref Filter 7 Loop Comp GND 15 470 pF 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF 3.3 k 470 pF NCP1650 Ramp CT Comp 14 13 47 k Figure 9. Voltage Error Amplifier Gain Re: NCP1650/D data sheet, Figures 12 & 13 Figure 10. Power Error Amplifier Gain Re: NCP1650/D data sheet, Figures 14 & 15 30 k 33 k 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF 30 k 3.3 k 10 k Ramp CT Comp 14 13 47 k CT 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF NCP1650 Freq Cntr 10 k Ramp CT Comp 14 13 470 pF Figure 11. Frequency versus CT Re: NCP1650/D data sheet, Figure 16 Figure 12. Ramp Peak versus Temperature Re: NCP1650/D data sheet, Figure 17 http://onsemi.com 3 NCP1650 TND307 0-15 V 1 Vin AC Comp Ref Filter AC Input FB/SD Loop Comp 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 1 mF 3 4 5 6 1.5 V 7 8 Pcomp 9 Pmax GND 15 3.3 k Ramp CT Comp 14 13 47 k CT Figure 13. UVLO Turn On/Turn Off Re: NCP1650/D data sheet, Figure 18 10 mA 5 mA 2 mA 0 mA 0.65 k 1.30 k 3.25 k NCP1650 A 1 Vin AC Comp Ref Filter AC Input FB/SD Loop Comp 2 Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 V 0.1 mF 14 V 1 mF V 3 4 5 6 1.5 V 7 8 Pcomp 9 Pmax GND 15 3.3 k Ramp CT Comp 14 13 47 k CT Figure 14. Vref Line/Load Regulation in Operating Mode Re: NCP1650/D data sheet, Figures 19 & 20 http://onsemi.com 4 NCP1650 TND307 14 V 1 mF NCP1650 9 0-5 V V 1k 1.5 V V Pmax 6 FB/SD 5 AC Input 7 Loop Comp 3 AC Comp 4 Ref Filter 8 Pcomp GND 15 16 Output 12 IS- 10 Iavg 11 V NCP1650 1 Vin 2 0.1 mF Vref 0-5 V V 1k 1.5 V Iavg fltr Ramp CT Comp 14 13 47 k 3.3 k 1 Vin 6 FB/SD 9 Pmax 5 AC Input 8 Pcomp 3 AC Comp 4 Ref Filter 7 Loop Comp GND 15 470 pF 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF Ramp CT Comp 14 13 47 k 3.3 k 470 pF Figure 15. Voltage Error Amplifier Gain Re: NCP1650/D data sheet, Figure 21 Figure 16. Power Error Amplifier Gain Re: NCP1650/D data sheet, Figure 22 Energize unit by applying 14 volt supply. Using a precision supply with resolution of 1 mV or less, adjust the voltage at pin 6 for zero current out of pin 7. The voltage at pin 6 will be the effective 4.0 V reference voltage. V A 1 Vin AC Comp Ref Filter AC Input FB/SD Loop Comp 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 VCC 1 mF Energize unit by applying 14 volt supply. Using a precision supply with resolution of 1 mV or less, adjust the voltage at pin 9 for zero current out of pin 8. The voltage at pin 9 will be the effective 2.5 V reference voltage. V V 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax 3.3 k GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 14 V 1 mF 3 4 5 6 1.5 V NCP1650 1 nF 7 8 Pcomp 9 Pmax GND 15 3.3 k Ramp CT Comp 14 13 47 k CT Ramp CT Comp 14 13 47 k CT Figure 17. Bias Current versus VCC Re: NCP1650/D data sheet, Figure 23 Figure 18. Vref versus VCC in Shutdown Mode Re: NCP1650/D data sheet, Figure 24 http://onsemi.com 5 NCP1650 TND307 14 V 1 mF 1.5 V 1 Vin 3 AC Comp 4 Ref Filter 5 AC Input 6 FB/SD 7 Loop Comp 8 Pcomp 9 Pmax GND 15 2 0.1 mF Vref 16 Output 12 IS- Iavg Iavg fltr 10 11 3.3 k Ramp CT Comp 14 13 47 k CT Figure 19. Minimum Duty Cycle versus Frequency Re: NCP1650/D data sheet, Figure 25 Apply power to 14 V supply and then to 1.5 V supply. Measure on time, and period at pin 16 using an oscilloscope. Vary capacitor value from 2000 pF to 100 pF for frequency range of 25 kHz to 300 kHz. NCP1650 http://onsemi.com 6 TND307 Notes http://onsemi.com 7 TND307 ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. 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: ONlit@hibbertco.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2700 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 TND307/D |
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