NCP1200A ON Semiconductor, NCP1200A Datasheet
NCP1200A
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NCP1200A Summary of contents
Page 1
... Because this occurs at a user adjustable low peak current, no acoustic noise takes place. The NCP1200A features an efficient protective circuitry which, in presence of an overcurrent condition, disables the output pulses while the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto− ...
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... GND The IC ground 5 Drv Driving pulses 6 V Supplies the − Generates the V NCP1200A * + NCP1200A Adj GND Drv Figure 1. Typical Application Example This pin lets you adjust the level at which the cycle skipping process takes place ...
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... Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. NCP1200A SKIP CYCLE COMPARATOR + − ...
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... Pin 3 to Current Setpoint Division Ratio Skip Cycle Generation Default Skip Mode Level Pin 1 Internal Output Impedance 1. Max value Maximum value @ please see characterization curves Pin 5 loaded by 1.0 nF. NCP1200A (For typical values for min/max values T J Symbol V CC(off) V CC(on) V CC(latch) ...
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... Figure 3. HV Pin Leakage Current vs. Temperature 10.2 10.1 10.0 9.9 9.8 9.7 9.6 − TEMPERATURE ( C) Figure 5. V vs. Temperature CC(on) 2.10 100 kHz 1.90 1.70 1.50 60 kHz 1.30 40 kHz 1.10 0.90 − TEMPERATURE ( C) Figure 7. ICC2 vs. Temperature NCP1200A TYPICAL CHARACTERISTICS 12.5 12.3 12.1 11.9 11.7 11.5 11.3 11.1 100 125 −25 0 Figure 4. V 900 850 800 750 700 650 600 −25 0 100 125 110 104 ...
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... Sink 10 0 − TEMPERATURE ( C) Figure 11. Drive and Source Resistance vs. Temperature 1.40 1.35 1.30 1.25 1.20 1.15 1.10 1.05 1.00 − TEMPERATURE ( C) Figure 13. V vs. Temperature SKIP NCP1200A TYPICAL CHARACTERISTICS 490 460 430 400 370 340 310 280 250 220 190 75 100 125 −25 0 Figure 10. ICC3 vs. Temperature 1.00 0.96 0.92 0.88 0.84 0.80 75 100 125 −25 0 Figure 12 ...
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... IC consumption plus the above driving current (altered by the driver’s efficiency). Suppose that the IC is supplied from a 350 VDC line. The current flowing through pin direct image of the NCP1200A consumption (neglecting the switching losses of the HV current source). If ICC2 equals 2 dissipated (lost) by the IC is simply: 350 x 2 ...
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... Figure 16. A simple diode naturally reduces the average voltage on pin 8 Skipping Cycle Mode The NCP1200A automatically skips switching cycles when the output power demand drops below a given level. This is accomplished by monitoring the FB pin. In normal operation, pin 2 imposes a peak current accordingly to the load value ...
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... RSENSE and 390 mV / RSENSE. Non−Latching Shutdown In some cases, it might be desirable to shut off the part temporarily and authorize its restart once the default has ON/OFF Figure 20. Another Way of Shutting Down the IC without a Definitive Latchoff State NCP1200A MAX PEAK CURRENT SKIP CYCLE CURRENT LIMIT 882.70 1 ...
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... Power Dissipation The NCP1200A is directly supplied from the DC rail through the internal DSS circuitry. The average current flowing through the DSS is therefore the direct image of the NCP1200A current consumption. The total power dissipation can be evaluated using: (V HVDC If we operate the device on a 250 VAC rail, the maximum rectified voltage can 350 VDC ...
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... IC. The corresponding transient fault duration due to the output capacitor charging must be less than the time needed to discharge from otherwise the supply will not properly start. The test consists NCP1200A REGULATION OCCURS HERE LATCHOFF ...
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... Cbulk Figure 23. A simple resistor in series avoids any latchup in the controller NCP1200A fed by its and OFF with a peak current limited by Rsense. Unfortunately, if the quality coefficient Q of the resonating network formed by Lp and Cbulk is low (e.g. the MOSFET Rdson + Rsense are small), conditions are met to make the circuit resonate and thus negatively bias the controller ...
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... NCP1200AD40R2 NCP1200AP60 NCP1200AP60G kHz = 60 kHz SW NCP1200AD60R2 NCP1200AD60R2G NCP1200AP100 NCP1200AP100G 100 kHz = 100 kHz SW NCP1200AD100R2 NCP1200AD100R2G †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. NCP1200A ORDERING INFORMATION ...
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... PLANE −Z− 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. NCP1200A PACKAGE DIMENSIONS SOIC−8 D SUFFIX CASE 751−07 ISSUE ...
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... F −A− NOTE 2 C −T− N SEATING PLANE 0.13 (0.005) M NCP1200A PACKAGE DIMENSIONS PDIP−8 P SUFFIX CASE 626−05 ISSUE http://onsemi.com 15 NOTES: 1. DIMENSION L TO CENTER OF LEAD WHEN FORMED PARALLEL. 2. PACKAGE CONTOUR OPTIONAL (ROUND OR SQUARE CORNERS) ...
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... The product described herein (NCP1200A), may be covered by the following U.S. patents: 6,271,735, 6,362,067, 6,385,060, 6,429,709, 6,587,357. There may be other patents pending. ON Semiconductor and are registered 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. “ ...