NCP1240 Datasheet (Fixed Frequency Current-Mode Controller)

Part: NCP1240
Manufacturer: onsemi (official site)
Size: 1.80 MB

NCP1240 Key Features

Fixed-Frequency Current-Mode Operation (65 kHz and 100 kHz
Timer-Based Overload Protection with Latched (Options A and E) or
High-voltage Current Source with Brown-Out Detection and
Frequency Modulation for Softened EMI Signature
Adjustable Overpower Protection Dependant on the Bulk Voltage
Latch-off Input bined with the Overpower Protection Sensing
VCC Operation up to 28 V, With Overvoltage Detection
500/800 mA Source/Sink Drive Peak Current
10 ms Soft-Start
Internal Thermal Shutdown

Related onsemi Datasheets

Part Number	Description
NCP12400	Fixed Frequency Current-Mode Controller
NCP1244	Fixed Frequency Controller
NCP1246	Fixed Frequency Controller
NCP1247	Fixed Frequency Controller
NCP1248	Fixed Frequency Current Mode Controller

NCP1240 Description

NCP1240 Fixed Frequency Current Mode Controller for Flyback Converters The NCP1240 is a new fixed−frequency current−mode controller featuring the Dynamic Self−Supply. This function greatly simplifies the design of the auxiliary supply and the VCC capacitor by activating the internal startup current source to supply the controller during start−up, transients, latch, stand−by etc. This device contains a special HV...

NCP1240 Applications

AC−DC Adapters for Notebooks, LCD, and Printers