IW1812-20中文资料瑞萨数据手册PDF规格书

● Primary-side feedback eliminates opto-isolators and

simplifies design

● Internal 800V bipolar junction transistor (BJT)

● 64kHz PWM switching frequency

● No-load power consumption < 30mW at 230VAC with

typical application circuit

● Fast dynamic load response for both one-time and

repetitive load transients

● Adaptive multi-mode PWM/PFM control improving

efficiency

● Quasi-resonant operation for highest overall

efficiency

● Ultra-low start-up current (1.7μA typical)

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

● Dynamic BJT base drive 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

● Built-in soft start

● Built-in short-circuit protection and output over-voltage

protection

● Built-in current-sense-resistor short-circuit protection

● Built-in over-temperature protection (OTP)

● No audible noise over entire operating range