NCP1280G SOP16
• Internal High Voltage Startup Regulator (25 V to 700 V)
• Dual Control Outputs with Adjustable Overlap Delay
• Programmable Maximum Duty Cycle Control
• Single Resistor Oscillator Frequency Setting
• Fast Line Feedforward
• Line Under/Overvoltage Lockout
• Dual Mode Overcurrent Protection
• Programmable Soft−Start
• Precision 5.0 V Reference
• This is a Pb−Free Device*
Typical Applications
• Off−Line Power Converters in 100−500 W Range
• Desktop Power Supplies (High−End)
• Industrial Power Supplies
• Plasma/LCD TV Front−End
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توضیحات
NCP1280
Active Clamp Voltage Mode
PWM Controller for Off-Line
Applications
The NCP1280 provides a highly integrated solution for off−line
power supplies requiring high−efficiency and low parts count. This
voltage mode controller provides control outputs for driving a forward
converter primary MOSFET and an auxiliary MOSFET for active
clamp circuit. The second output with its programmable delay can also
be used for driving a synchronous rectifier on the secondary or for
asymmetric half bridge circuits. Incorporation of high voltage startup
circuitry (with 700 V capability) reduces parts count and system
power dissipation. Additional features such as line UV/OV protection,
soft−start, single resistor programmable (high) frequency oscillator,
line voltage feedforward, dual mode overcurrent protection and
maximum duty cycle control, allow converter optimization at minimal
cost. Compared to a traditional forward converter, an NCP1280 based
converter can offer significant efficiency improvements and system
cost savings.
توضیحات تکمیلی
| Package |
SOP-16 |
|---|---|
| کیفیت |
original |
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