Overview

The iW1798 is a 45W output, high-performance AC/DC RapidCharge™ power supply controller that integrates Renesas' XM-Comm technology, eliminating all optocouplers from travel adapters to reduce cost and improve reliability. It supports Qualcomm® Quick Charge™ 3.0, 2.0 and other rapid charging protocols.

The iW1798 is optimized to work with Renesas' iW662 secondary-side synchronous rectifier controller and rapid charge interface IC. The secondary-side IC uses XM-Comm technology to transmit all necessary information via an optocoupler to the iW1798, including voltage requests, output current limits, output voltage undershoot, output overvoltage, and fault and reset signals.

The device offers a full array of advanced protection features, including an advanced fault protection technology that reduces power during a fault, an X-Cap discharge function to safely discharge the input capacitor when the travel adapter is unplugged, and Renesas' advanced fault control technology to address soft short circuits in charger cables and connectors without latching off the output.

Qualcomm Quick Charge is a product of Qualcomm Technologies, Inc.

iW1798 Functional Block Diagram
iW1798 Typical Applications Diagram
iW1798 Functional Block Diagram
iW1798 Typical Applications Diagram
  • Output Power - 45W+
  • Optimized to Work with iW662 to Support Multiple RapidCharge Protocols:
    • Qualcomm Quick Charge 3.0
    • Qualcomm Quick Charge 2.0
  • XM-Comm - Proprietary Secondary-to-Primary Digital Communication via Power Transformer:
    • Reduces BOM and Significantly Simplifies Design
    • Handles All Rapid Charging Information
  • Ultra-Low No-Load Power Consumption
    • <75mW with Ample Margin at 230VAC
    • <20mW with External Active Start-Up Circuit
  • Robust Protection Features
    • Output Overvoltage Protection or X-Cap Discharge
    • Overcurrent Protection
    • SD pin for external NTC Temperature Protection
  • Advanced Fault Control Technology
    • Helps Protect Cables and Connectors from Excessive Heat and Damage by Reducing Average Power without Needing a Latch

Applications

  • RapidCharge AC/DC Power Adapters for Smartphones, Tablets and Other Mobile Devices Using Qualcomm Quick Charge 3.0, 2.0 and other Protocols

Documentation

= Featured Documentation
Type Title Date
Datasheet
iW1798 Datasheet
Log in to Download PDF 949 KB
Product Brief
iW1798 Product Summary
PDF 498 KB
2 items

Design & Development

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.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Carrier Type
    Buy / Sample
    Part Number
    iW1798-38
    circleActive
    memory
    view_in_ar
    Samples Available
    		 SOIC-8 Get Samples,
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product