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NCP1124

ON Semiconductor
Part Number NCP1124
Manufacturer ON Semiconductor
Description High-Voltage Switcher
Published Jan 24, 2016
Detailed Description NCP1124, NCP1126, NCP1129 High Voltage Switcher for Offline Power Supplies The NCP112x products integrates a fixed−fre...
Datasheet PDF File NCP1124 PDF File

NCP1124
NCP1124

Overview
NCP1124, NCP1126, NCP1129 High Voltage Switcher for Offline Power Supplies The NCP112x products integrates a fixed−frequency peak current mode controller with a low on−resistance, 650 V MOSFET.
Available in a PDIP−7 package, the NCP112x offers a high level of integration, including soft−start, frequency−jittering, short−circuit protection, thermal shutdown protection, frequency foldback mode and skip−cycle to reduce power consumption in light load condition, peak current mode control with adjustable internal ramp compensation and adjustable peak current set point.
During nominal load operation, the part switches at one of the available frequencies (65 or 100 kHz).
When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads.
When the power demand reduces further, it enters into a skip mode to reduce the standby consumption down to no load condition.
Protection features include: a timer to detect an overload or a short−circuit event with auto−recovery or latch protection, and a built−in VCC overvoltage protection.
The switcher also provides a jittered 65 kHz or 100 kHz switching frequency to improve the EMI.
Features • Built−in 650 V, 1 A MOSFET with RDS(on) of 8.
6 W for NCP1124 • Built−in 650 V, 1.
8 A MOSFET with RDS(on) of 5.
4 W for NCP1126 • Built−in 650 V, 5.
5 A MOSFET with RDS(on) of 2.
1 W for NCP1129 • Fixed−Frequency 65 or 100 kHz Current Mode Control with Adjustable Internal Ramp Compensation • Adjustable Current Limit with External Resistor • Frequency Foldback Down to 26 kHz and Skip−Cycle for Light Load Efficiency • Frequency Jittering for EMI Improvement • Less than 100 mW Standby Power @ High Line • EPS 2.
0 Compliant • 7−Pin Package Provides Creepage Distance • These are Pb−Free Devices www.
onsemi.
com PDIP−7 P SUFFIX CASE 626B MARKING DIAGRAMS 112xyPzzz AWL YYWWG 1 x = Specific Device Code 4 = NCP1124 6 = NCP1126 9 = NCP1129 y = A or B A = Latch B = Auto−recovery zzz = Fr...


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