Onsemi NCP1219

Description

The NCP1219 represents a new, pin to pin compatible, generationof the successful 7−pin 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, timer−based faultdetection and a latch input make this controller an excellentcandidate for converters where ruggedness and component cost arethe key constraints.The Dynamic Self Supply (DSS) drastically simplifies thetransformer design in avoiding the use of an auxiliary winding tosupply the NCP1219. This feature is particularly useful inapplications 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.

Features

• Fixed−Frequency Current−Mode Operation with RampCompensation (65 kHz and 100 kHz Options)
• Dynamic Self Supply Eliminates the Need for an Auxiliary Winding
• Timer−Based Fault Protection for Improved Overload Detection
• Cycle Skip Reduces Input Power in Standby Mode
• Latch and Auto−Recovery Overload Protection Options
• Internal High Voltage Startup Circuit
• Accurate Current Limit Detector (±5%)
• Adjustable Skip Level
• Latch Input for Easy Implementation of Overvoltage andOvertemperature Protection
• Frequency Modulation for Softened EMI Signature
• 500 mA/800 mA Peak Source/Sink Current Drive Capability
• Pin to Pin Compatible with the Existing NCP12XX Series
• These Devices are Pb−Free and Halogen Free/BFR Free*

Typical applications

• LCD Monitors
• Offline Battery Chargers
• Consumer Electronic Appliances STB, DVD, DVDR
• AC−DC Adapters for Notebooks

More information

• Datasheet
• IC product information