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Low-Power Off-Line Digital Green-Mode PWM Controller
● Primary-side feedback eliminates opto-isolators and
simplifi es 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 effi ciency
● Adaptive multi-mode PWM/PFM control improves
effi ciency
● Quasi-resonant operation for highest overall effi ciency
● Direct drive of low-cost BJT switch
● Dynamic base current control
● No external compensation components required
● Complies with EPA 2.0 energy-effi ciency specifi cations
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
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