IW1678 Overview
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...
IW1678 Key Features
- 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