Products: AC-DC ICs: iW1678

iW1678 Low-Power Off-Line Digital Green-Mode PWM Controller

Features

Primary-side feedback eliminates opto-isolators and simplifies design
64 kHz PWM switching frequency
Meets <100mW no-load power consumption
Adaptive multi-mode PWM/PFM control improves efficiency
Quasi-resonant operation for highest overall efficiency & low EMI
EZ-EMI ® design to easily meet global EMI standards
Direct drive of low-cost BJT switch
Very tight constant voltage and constant current regulation with primary-side feedback
No external compensation components required
Complies with EPA 2.0 energy-efficiency specifications with ample margin
Low start-up current (8 μA typical)
Built-in short circuit protection and output overvoltage protection
Built-in current sense resistor short circuit protection
No audible noise over entire operating range
Space-saving SOT-23 package

Application

Low power compact AC/DC adapters/chargers for cell phones, PDAs, digital still cameras
AC/DC adapters for ADSL, wireless access points, routers
LED lighting

Products

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