12W AccuSwitch™ AC/DC Digital Primary-Side Switcher Eliminates Optocoupler and Maintains Excellent Cross-Regulation Accuracy
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Overview
Description
The iW1818 AccuSwitch™ digital PWM converter integrates a highly accurate control circuit with an 800V bipolar junction transistor (BJT) power switch to provide a complete solution for off-line power conversion at up to 12W of output power.
Renesas' 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, overvoltage and overcurrent conditions as well as EZ-EMI® technology to easily meet global EMI specifications.
A DiaSIM™ simulation model is available for the iW1818. For more information and where to download, please visit the DiaSIM page.
Features
- 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:
- Over-Temperature Protection
- Output Overvoltage and Overcurrent
- Sense-Resistor Short Circuit Protection Application
- Thermally Efficient PDIP-7 Package to Support High Power
Applications
Applications
- Networking Power for ADSL, Wireless Access Points and Routers
- Home Appliances
- Set-Top Boxes
- DiaSIM™ Simulation Model Available
Documentation
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Date | |
|---|---|---|
| PDF 617 KB | Product Brief | |
| PDF 5.51 MB 日本語 | Brochure | |
| PDF 1012 KB | Datasheet | |
| ZIP 2.51 MB | Other | |
| ZIP 1.29 MB | Other | |
| ZIP 1.31 MB | Other | |
| PDF 766 KB | White Paper | |
| PDF 279 KB | White Paper | |
| PDF 3.96 MB | Manual - Development Tools | |
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Design & Development
Software & Tools
Software & Tools
| Software title
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Software type
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Company
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|---|---|---|
| DiaSIM™ Simulation Models DiaSIM simulation models let the user test and validate AC/DC power supply designs prior to prototyping.
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Simulator | Renesas |
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Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| PDIP-7L |
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