概览
描述
The iW1676 is a high-performance AC/DC controller designed to drive a low-cost bipolar junction transistor (BJT) power switch in peak current mode PWM flyback power supplies up to 5W. Ideal for power adapters for smartphones, the iW1676 integrates Renesas' PrimAccurate™ digital primary-side control, eliminating the need for the secondary-side optocoupler, and reducing component count and solution cost.
The iW1676 easily meets the US DoE’s external power supply standard and the EU’s Code of Conduct, Version 5, Tier 2 standard, with a no-load power consumption of less than 30mW. Additional features include Renesas' proprietary EZ-EMI™ technology, quasi-resonant control for optimal efficiency at heavy loads, cable and connector voltage drop compensation options, full protection from fault conditions, and tiny packaging.
特性
- Easily meets DoE external power supply and EU Code of Conduct, Version 5, Tier 2 standards
- Less than 30mW no-load power consumption
- Low 1.7µA start-up current
- 64kHz PWM switching frequency
- Voltage offset compensation for voltage loss in cables and connectors (4 options)
- PrimAccurate™ - Primary-side control, no optocoupler needed
- Intrinsically low noise solution - No audible noise over the entire operating range
- Quasi-resonant control for optimal efficiency
- EZ-EMI™ design to easily meet global EMI specifications
- Fast dynamic load regulation
- Tiny SOT-23-5 package
- Fully protected from fault conditions
- Over-temperature protection
- Output overvoltage and overcurrent
- Input undervoltage protection
- Sense-resistor short circuit protection
产品对比
应用
设计和开发
模型
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