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IW1706-03  - Low-Power Off-line Digital PWM Controller

Features

 Primary-side feedback eliminates opto-isolators and simplifies design

 Adaptively controlled soft start-up enables fast and

smooth start-up for a wide range of capacitive loads (from 330 μF to 6000 μF)

 Very tight constant voltage regulation

 EZ-EMI ® design enhances manufacturability

 Intrinsically low common mode noise

 Optimized 72 kHz maximum PWM switching frequency achieves best size and efficiency

 Adaptive multi-mode PWM/PFM control improves efficiency

 Quasi-resonant operation for highest overall efficiency

 Direct drive of low-cost BJT switch

 Dynamic base current control

 No external compensation components required

 Complies with EPA 2.0 energy-efficiency specifications with ample margin

 Built-in short circuit protection and output overvoltage protection

 Built-in current sense resistor short circuit protection

 Constant current control enables output current limit and overload protection

 No audible noise over entire operating range