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1200AP100

ON Semiconductor
Part Number 1200AP100
Manufacturer ON Semiconductor
Description PWM Current-Mode Controller
Published Sep 9, 2008
Detailed Description NCP1200A PWM Current−Mode Controller for Universal Off−Line Supplies Featuring Low Standby Power Housed in SOIC−8 or PDI...
Datasheet PDF File 1200AP100 PDF File

1200AP100
1200AP100

Overview
NCP1200A PWM Current−Mode Controller for Universal Off−Line Supplies Featuring Low Standby Power Housed in SOIC−8 or PDIP−8 package, the NCP1200A enhances the previous NCP1200 series by offering a reduced optocoupler current together with an increased drive capability.
Due to its novel concept, the circuit allows the implementation of complete off−line AC−DC adapters, battery charger or a SMPS where standby power is a www.
DataSheet4U.
com key parameter.
With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz, the controller supplies itself from the high−voltage rail, avoiding the need of an auxiliary winding.
This feature naturally eases the designer task in battery charger applications.
Finally, current−mode control provides an excellent audio−susceptibility and inherent pulse−by−pulse control.
When the current setpoint falls below a given value, e.
g.
the output power demand diminishes, the IC automatically enters the so−called skip cycle mode and provides excellent efficiency at light loads.
Because this occurs at a user adjustable low peak current, no acoustic noise takes place.
The NCP1200A features an efficient protective circuitry which, in presence of an overcurrent condition, disables the output pulses while the device enters a safe burst mode, trying to restart.
Once the default has gone, the device auto−recovers.
Features 8 1 http://onsemi.
com MINIATURE PWM CONTROLLER FOR HIGH POWER AC−DC WALL ADAPTERS AND OFFLINE BATTERY CHARGERS MARKING DIAGRAMS 8 8 1 SOIC−8 D SUFFIX CASE 751 1 8 PDIP−8 P SUFFIX CASE 626 1 1200APxxx AWL YYWW 200Ay ALYW • • • • • • • • • • • • Pb−Free Packages are Available No Auxiliary Winding Operation Auto−Recovery Internal Output Short−Circuit Protection Extremely Low No−Load Standby Power Current−Mode Control with Skip−Cycle Capability Internal Temperature Shutdown Internal Leading Edge Blanking 250 mA Peak Current Capability Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz Direct Optocoupler Connection S...


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