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NCP1219 PWM Controller withAdjustable Skip Level andExternal Latch Input

The NCP1219 represents a new, pin to pin compatible, generationof the successful 7pin current mode NCP12XX product series. Thecontroller allows for excellent standby power consumption by use ofits adjustable skip mode and integrated high voltage startup FET. Internal frequency jittering, ramp compensation, timerbased fault detection and a latch input make this controller an excellent candidate for converters where ruggedness and component cost are the key constraints.The Dynamic Self Supply (DSS) drastically simplifies thetransformer design in avoiding the use of an auxiliary winding to supply the NCP1219. This feature is particularly useful in applications where the output voltage varies during operation (e.g. battery chargers). Due to its high voltage technology, the IC can bedirectly connected to the high voltage dc rail.
http://onsemi.com SOIC7D SUFFIXCASE 751U MARKING DIAGRAM 1219XZALYW Features 18

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FixedFrequency CurrentMode Operation with RampCompensation (65 kHz and 100 kHz Options)
1219= Specific Device CodeX= Overcurrent= (A = latch, B = autoretry)Z= Frequency= (6 = 65 kHz, 1 = 100 kHz)A= Assembly LocationL= Wafer LotY= YearW= Work Week

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Dynamic Self Supply Eliminates the Need for an Auxiliary Winding

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TimerBased Fault Protection for Improved Overload Detection

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Cycle Skip Reduces Input Power in Standby Mode

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Latch and AutoRecovery Overload Protection Options

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Internal High Voltage Startup Circuit

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Accurate Current Limit Detector ( ± 5%)
= PbFree Package

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Adjustable Skip Level

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Latch Input for Easy Implementation of Overvoltage andOvertemperature Protection
PIN CONNECTIONS

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Frequency Modulation for Softened EMI Signature
1DrvGNDCSFBSkip/latch HVV

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500 mA/800 mA Peak Source/Sink Current Drive Capability

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Pin to Pin Compatible with the Existing NCP12XX Series
CC

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This is a PbFree and HalideFree Device
(Top View) Typical Applications

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ACDC Adapters for Notebooks, LCD Monitors

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Offline Battery Chargers
ORDERING INFORMATION See detailed ordering and shipping information in the packagedimensions section on page 19 of this data sheet.

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Consumer Electronic Appliances STB, DVD, DVDR
 Semiconductor Components Industries, LLC, 2009 Publication Order Number: February, 2009 Rev. 01 NCP1219/D