NCP1203 ON Semiconductor, NCP1203 Datasheet
NCP1203
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NCP1203 Summary of contents
Page 1
... Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit Protection Housed in SOIC-8 or PDIP-8 package, the NCP1203 represents a major leap toward ultra-compact Switchmode Power Supplies and represents an excellent candidate to replace the UC384X devices. Due to its proprietary SMARTMOSt Very High Voltage Technology, the ...
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... The IC ground 5 Drv Driving pulses 6 V Supplies the Ensure a clean and lossless startup sequence NCP1203 * Aux. + NCP1203 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 Voltage on Pin 8 (HV) with Pin 6 (V 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. NCP1203 SKIP CYCLE COMPARATOR + ...
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... Skip Cycle Generation Default Skip Mode Level Pin 1 Internal Output Impedance 1. Max value 0° Maximum value @ T = 25°C, please see characterization curves Pin 5 loaded by 1 nF. NCP1203 (For typical values T = 25°C, for min/max values T J Symbol Pin V 6 CC(on) V ...
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... TEMPERATURE (°C) Figure 5. I Current Consumption (No Load) C versus Temperature 8.0 7.5 60 kHz 7.0 6.5 40 kHz 6.0 5.5 5.0 100 kHz 4.5 4.0 -50 - TEMPERATURE (°C) Figure 7. HV Current Source at V versus Temperature NCP1203 8.4 8.2 8.0 7.8 7.6 7.4 7.2 75 100 125 -50 -25 Figure 4. V 2.0 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1.1 1.0 75 100 125 -50 -25 Figure 6. I 400 350 ...
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... TEMPERATURE (°C) Figure 9. Drive Source Resistance versus Temperature 0.99 0.97 0.95 0.93 0.91 0.89 0.87 0.85 -50 - TEMPERATURE (°C) Figure 11. Maximum Current Setpoint versus Temperature NCP1203 100 125 -50 -25 Figure 10. Drive Sink Resistance versus 120 100 100 ...
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... AC-DC adapters, VCRs etc. UC384X series have a lot of difficulty to reduce the switching losses at low power levels. NCP1203 elegantly solves this problem by 12.8 V/4.9 V Figure 13. The Current Source Brings V Once the power supply has started, the V constrained below 16 V, which is the maximum rating on pin 6 ...
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... By skipping un-needed switching cycles, the NCP1203 drastically reduces the power wasted during light load conditions. In no-load conditions, the NCP1203 allows the total standby power to easily reach next International Energy Agency (IEA) recommendations. No Acoustic Noise while Operating Instead of skipping cycles at high peak currents, the ...
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... CC consumption as soon as V reaches 12.8 V. Suppose that a CC NCP1203P60 is used and drives a MOSFET with total gate charge (Qg). The total average current is thus made of ICC1 (700 mA) plus the driver current, Fsw 1.8 mA. The total current is therefore 2.5 mA. The DV available to fully startup the circuit (e.g. never reach the 7.8 V UVLO during power on) is 12.8– ...
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... V that will fix the skip peak current level between 120 mV/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 NCP1203 MAX PEAK CURRENT SKIP CYCLE CURRENT LIMIT 882 ...
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... Figure 21 depicts a typical negative shot occurring on the HV pin where the brutal V testifies for latchup. http://onsemi.com level exceeds the zener breakdown voltage, CC Rhold 12 k NCP1203 LAux CC capacitor and keeps activating the CC capacitor. If this CC CC ...
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... Cbulk Figure 22. A simple resistor in series avoids any latchup in the controller NCP1203 Another option (Figure 23) consists in wiring a diode from V to the bulk capacitor to force V CC sooner and thus stops the switching activity before the bulk capacitor gets deeply discharged. For security reasons, two diodes can be connected in series ...
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... Device NCP1203P40 NCP1203P40G NCP1203D40R2 NCP1203D40R2G NCP1203P60 NCP1203P60G NCP1203D60R2 NCP1203D60R2G NCP1203P100 NCP1203P100G NCP1203D100R2 NCP1203D100R2G †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. NCP1203 Package PDIP-8 PDIP-8 (Pb-Free) SOIC-8 ...
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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. NCP1203 PACKAGE DIMENSIONS SOIC-8 NB CASE 751-07 ISSUE 0.10 (0.004 SOLDERING FOOTPRINT* 1 ...
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... 0.13 (0.005) The product described herein (NCP1203), 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. SMARTMOS is a trademark of Motorola, Inc. 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 ...