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12W AccuSwitch™ AC/DC Digital Primary-Side Switcher Eliminates Optocoupler and Maintains Excellent Cross-Regulation Accuracy
72kHz integrated 800V BJT optimized for 12Vout
The iW1818 AccuSwitch™ digital PWM converter integrates a highly accurate control circuit with an 800V BJT power switch to provide a complete solution for off-line power conversion at up to 12W of output power.
Dialog's PrimAccurate™ primary-side digital control algorithms eliminate the need for failure-prone optocouplers and ensure excellent cross-regulation accuracy, to enable the longer operating lifetime, high performance and reduced cost required for white goods applications.
The output is designed to smoothly start-up into large capacitors while maintaining a quick turn-on time. It operates in quasi-resonant mode to optimize efficiency and incorporates a low-power mode that achieves <50mW of no-load power consumption to meet global energy efficiency regulations. Additional features include full protection from over-temperature, over-voltage and over-current conditions as well as EZ-EMI® technology to easily meet global EMI specifications.
10W – 12W Output Power
AccuSwitch™ - Integrated 800V Power BJT
PrimAccurate™ Primary-Side Control
- No Optocoupler Needed
Intelligent Digital Control Loop for Accurate Voltage Cross-Regulation
Meets Global Energy Efficiency Standards
- < 50mW No-Load Power Consumption
- Quasi-resonant Control for Optimal Efficiency
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:
Output Over-Voltage and Over-Current
Sense-Resistor Short Circuit Protection Application
Thermally Efficient PDIP-7 Package to Support High Power
Typical application diagram
Functional block diagram
Dialog’s DiaSIM simulation models and tools enable simulation and validation of AC/DC power supplies using highly accurate models for selected products. All models and application circuits are available for download from the support website.
Important note: Dialog's DiaSIM models are only compatible with the 32-bit version of NL5.Download
Important note: Dialog's DiaSIM models are only compatible with the 32-bit version of NL5.