IW1678中文資料瑞薩數(shù)據(jù)手冊PDF規(guī)格書

● Primary-side feedback eliminates opto-isolators and

simplifies design

● 64-kHz PWM switching frequency

● No-load power consumption < 100 mW at 230 Vac with

tight dynamic load transient response

● Able to meet < 30 mW no-load power consumption with

large value pre-load resistor

● Adaptive multi-mode PWM/PFM control improves efficiency

● Quasi-resonant operation for highest overall efficiency

● EZ-EMI ? design to easily meet global EMI standards

● Direct drive of low-cost BJT switch

● Dynamic base current control

● Very tight constant voltage and constant current

regulation with primary-side-only 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 soft start

● Built-in short circuit protection and output overvoltage protection

● Built-in current sense resistor short circuit protection

● No audible noise over entire operating range