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NCP1910 Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1910 Datasheet(HTML) 1 Page - ON Semiconductor |
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1 / 37 page  © Semiconductor Components Industries, LLC, 2012 December, 2012 − Rev. 1 1 Publication Order Number: NCP1910/D NCP1910 High Performance Combo Controller for ATX Power Supplies Housed in a SO−24WB package, the NCP1910 combines a state−of−the−art circuitry aimed to powering next generation of ATX or flat TVs converters. With a 65 kHz Continuous Conduction Mode Power Factor Controller and a LLC controller hosting a high−voltage driver, the NCP1910 is ready to power 85+ types of offline power supplies. To satisfy stringent efficiency considerations, the PFC circuit implements an adjustable frequency fold back to reduce switching losses as the load is going light. To cope with all the signal sequencing required by the ATX and flat TVs specifications, the controller includes several dedicated pins enabling handshake between the secondary and the primary sides. These signals include a power−good line but also a control pin which turns the controller on and off via an opto coupler. Safety−wise, a second OVP input offers the necessary redundancy in case the main feedback network would drift away. Finally, a fast fault input immediately reacts in presence of an over current condition by triggering an auto−recovery soft−start sequence. Features • Fixed−Frequency 65 kHz CCM Power Factor Controller • Average Current−Mode Control for Low Line Distortion • Dynamic Response Enhancer Reduces Bulk Undershoot • Independent Over Voltage Protection Sensing Pin with Latch−off Capability • Adjustable Frequency Fold Back Improves Light Load Efficiency • Adjustable Line Brown−out Protection with 50 ms Delay to Help Meeting Hold−up Time Specifications • Programmable Over current Threshold Leads to an Optimized Sensing Resistor • ±1 A peak Current Drive Capability • LLC Controller Operates from 25 kHz to 500 kHz • On Board 600 V High−Voltage Drivers • 1 A/0.5 A Sink/Source Capability • Minimum Frequency Precision Down to ±3% Over Temperature Range • Internally Fixed Dead−Time Value of 300 ns • Adjustable Soft−Start Sequence • Fast Fault Input with Soft−Start Trigger for Immediate Auto−Recovery Protection • on/off Control Pin for Secondary−Based Remote Control • On−Board 5 V Reference Voltage for Precise Thresholds/Hysteresis Adjustments • Power Good Output Management Signal • A Version with Dual Ground Pinout (No Skip), B Version with Single Ground and Skip Operation for the LLC Controller • 20 V Operation • These are Pb−Free Devices Typical Applications • Multi Output ATX Power Supplies (A version) • Flat TVs Power Supplies (B version) MARKING DIAGRAM SO−24WB Less Pin 21 DW SUFFIX CASE 752AB http://onsemi.com See detailed ordering and shipping information in the package dimensions section on page 36 of this data sheet. ORDERING INFORMATION NCP1910XXX AWLYYWWG 1 XXXXX = Specific Device Code A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package |
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