Power & Power Management

Overview

Description

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.

A DiaSIM™ simulation model is available for the iW1702. For more information and where to download, please visit the DiaSIM™ page.

Features

  • 45W maximum output power
  • iW1702-0X/3X options:
    • External supplemental output overvoltage protection, optimized for 9V+ output voltages
  • iW1702-1X options:
    • External input overvoltage protection, supports 5V+ output voltages
  • Programmable light load mode to optimize no-load power consumption and DLR
  • < 75mW no-load power consumption
  • Compliant with DoE Level VI and EU’s CoC, Version 5, Tier 2 external power supply standards
  • PrimAccurate™ primary-side regulation technology
    • Eliminates the need for optocoupler
  • SmartDefender™ smart hiccup technology
    • Protects from soft shorts in cables and connectors
  • Additional protection features
    • Output short circuit protection
    • Output overcurrent protection
    • Over-temperature protection

Applications

Documentation

Title Type Date
PDF581 KB
Product Brief
PDF1.14 MB
Datasheet
PDF1.19 MB
Application Note
PDF3.96 MB
Manual - Development Tools
ZIP4.76 MB
Other
ZIP2.80 MB
Other
PDF279 KB
White Paper

Design & Development

Software & Tools

Software & Tool Pages

Title Type Company
DiaSIM™ Simulation ModelsDiaSIM simulation models let the user test and validate AC/DC power supply designs prior to prototying.Downloads: Simulator Renesas

Models

Models

Title Type Date
ZIP624 KB
Model - Other
ZIP207 KB
Model - Other

Support