The iW1702 is a digital offline controller for AC/DC power supplies up to 45W optimized for 9V or greater output voltages. The part uses Renesas' PrimAccurate™ primary-side control technology, eliminating the need for an optical isolation device on the secondary, reducing component count and cost.
For highest power density power supplies, the iW1702 can be paired with the iW676 digital synchronous rectifier controller, which drives a power MOSFET on the secondary side of the power supply to replace the main rectifying diode.
The iW1702 integrates a unique light load operation mode that allows the user to configure the minimum switching frequency at light load through an external resistor. The higher the light load mode switching frequency, the better the dynamic load response (DLR). If the lowest switching frequency is chosen, the no-load power consumption is reduced, negatively impacting the DLR performance. In this case, the iW676 offers integrated active voltage position (AVP) control options that can be used for faster DLR while keeping the no-load power consumption <75mW.
A full array of protection features are integrated, including SmartDefender™ advanced hiccup technology to protect against soft shorts in cables and connectors.
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|Document title||Document type
|PDF 581 KB||Product Brief|
|PDF 1.14 MB||Datasheet|
|PDF 1.19 MB||Application Note|
|PDF 3.96 MB||Manual - Development Tools|
|ZIP 2.02 MB||Other|
Reference Design EBC10113: iW1702-00 and iW673-20 for 20V/2.3A Slim Adapter Design with Synchronous RectifierZIP 4.76 MB
Reference Design EBC10114: iW1702-00 for 12V/1A Low Cost Adapter Design with less than 75mW No-Load PowerZIP 2.80 MB
|PDF 279 KB||White Paper|
|DiaSIM™ Simulation Models
DiaSIM simulation models let the user test and validate AC/DC power supply designs prior to prototyping.
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.
|Title||Type Type||Date Date|
|ZIP 624 KB||Model - Other|
|ZIP 207 KB||Model - Other|