Dialog IW1818-EVAL Off-Line Digital PWM Controller is a high-performance AC/DC power supply control device that uses digital control technology to build peak current mode PWM flyback power supplies. The device includes an internal power BJT, operates in a quasi-resonant mode, and includes key built-in protection features. This combination of features and integration simplifies design, improves efficiency, reduces EMI and lowers the bill of material cost. The IW1818-EVAL features a distinctive soft-start scheme, which allows for fast and yet smooth start-up with both small and large capacitive loads. It removes the need for a secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for loop compensation components while maintaining stability over all operating conditions. A pulse-by-pulse waveform analysis allows for fast dynamic load response. The built-in power limit function enables optimized transformer design for a wide input voltage range.
Feature
- Adaptively Controlled Soft Start-up
- Fast, Smooth Start-up Into Large Capacitive Loads
- EZ-EMI™ Design to Easily Meet Global EMI Specifications
- Fully Protected from Fault Conditions:
- Over-Temperature Protection
- Output Over-Voltage and Over-Current
- Sense-Resistor Short Circuit Protection Application
- Thermally Efficient PDIP-7 Package to Support High Power
Applications
- Networking power for ADSL, wireless access points and routers
- Home appliances
- Set-top boxes
