NCP1200 ON Semiconductor, NCP1200 Datasheet
NCP1200
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NCP1200 Summary of contents
Page 1
... PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies Housed in SOIC-8 or PDIP-8 package, the NCP1200 represents a major leap toward ultra-compact Switchmode Power Supplies. Due to a novel concept, the circuit allows the implementation of a complete offline battery charger or a standby SMPS with few external components ...
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... HV Generates the V Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á NCP1200 * Adj ...
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... Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. NCP1200 Skip Cycle 1.4 V 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 @ T = -25° Max value @ T = 25°C, please see characterization curves. J NCP1200 (For typical values T = +25°C, for min/max values T J Pin = 40 kHz kHz SW = 100 kHz ...
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... TEMPERATURE (°C) Figure vs. Temperature CC 2.10 100 kHz 1.90 1.70 1.50 60 kHz 1.30 40 kHz 1.10 0.90 - TEMPERATURE (°C) Figure 7. I vs. Temperature CC2 NCP1200 11.70 11.60 11.50 11.40 11.30 11.20 11.10 75 100 125 -25 Figure 4. V 900 850 800 750 700 60 kHz 650 600 75 100 125 -25 110 104 ...
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... Sink TEMPERATURE (°C) Figure 11. DRV Source/Sink Resistances 1.34 1.33 1.32 1.31 1.30 1.29 1.28 - TEMPERATURE (°C) Figure 13. V vs. Temperature skip NCP1200 460 430 400 370 340 310 280 250 220 190 75 100 125 -25 1.00 0.96 0.92 0.88 0.84 0.80 75 100 125 -25 Figure 12. Current Sense Limit vs. Temperature 86.0 84.0 82 ...
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... INTRODUCTION The NCP1200 implements a standard current mode architecture where the switch-off time is dictated by the peak current setpoint. This component represents the ideal candidate where low part-count is the key parameter, particularly in low-cost AC-DC adapters, auxiliary supplies etc. Due to its high-performance High-Voltage technology, the NCP1200 incorporates all the necessary ...
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... Make sure the auxiliary voltage never exceeds the 16 V limit. Skipping Cycle Mode The NCP1200 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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... RqJ*A reach the worse consumption budget imposed by the 100 kHz version. Two solutions exist to cure this trouble. The first one consists in adding some copper area around the NCP1200 DIP8 footprint. By adding a min-pad area copper (1 oz drops to about 75°C/W qJ- A which allows the use of the 100 kHz version ...
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... This appends 9.8 V and it remains stuck until V CC reaches 6 are in latchoff phase. Again, using the calculated 10 mF and 350 mA current consumption, this latchoff phase lasts: 109 ms. NCP1200 Regulation Occurs Here Latchoff Phase Driver Pulses ...
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... CV CC Figure 23 diode forces V inherent short-circuit protection of the NCP1200, you only need a bunch of components around the IC, keeping the final cost at an extremely low level. The transformer is available from different suppliers as detailed on the following page. http://onsemi.com 11 to reach UVLOlow ...
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... R9 330 mH 10 Figure 24. A typical AC-DC wall adapter showing the reduced part count due to the NCP1200 T1 2.9 mH, Np:Ns = 1:0.08, leakage = 80 mH, E16 core, NCP1200P40 To help designers during the design stage, several manufacturers propose ready-to-use transformers for the above application, but can also develop devices based on your particular specification: ...
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... Improving the Output Drive Capability The NCP1200 features an asymmetrical output stage used to soften the EMI signature. Figure 25 depicts the way the driver is internally made Figure 25. The higher ON resistor slows down the MOSFET while the lower OFF resistor ensures fast turn-off ...
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... Further tweaking is nevertheless necessary to tune the dissipated power versus standby power. Available Documents “Implementing the NCP1200 in Low-cost AC-DC Converters”, AND8023/D. “Conducted EMI Filter Design for the NCP1200'', AND8032/D. “Ramp Compensation for the NCP1200'', AND8029/D. TRANSient and AC models available to download at: http://onsemi.com/pub/NCP1200 NCP1200 design spreadsheet available to download at: http://onsemi ...
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... G C 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. NCP1200 PACKAGE DIMENSIONS SOIC-8 NB CASE 751-07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...
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... H G 0.13 (0.005) The product described herein (NCP1200), 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 ...