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iW673

Digital Green-Mode Synchronous Rectifier Controller

iw673_typical_application_diagram_new.jpg

High performance synchronous rectifier for compact AC/DC adapters

Combined with the MOSFET, the iW673 can emulate the diode rectifier at the secondary side of the flyback to reduce conduction loss. The iW673 determines the timing of the driver by sensing the voltage across the RDS(ON) to achieve lossless sensing. The iW673 uses proprietary digital adaptive turn-off control technology to minimize the turn-off deadtime of the synchronous rectifier so that the parallel Schottky diode required by conventional synchronous rectifiers can be eliminated. The integrated driver has strong driving capability for high efficiency. The operating power consumption of the controller excluding the driver is less than 4mW at no load to achieve the ultra-low no-load power consumption for 5V applications. The iW673 integrates a pulse linear regulator to maintain the operation of the synchronous rectifier at low system output voltage when the system is operating in constant current (CC) mode.

A DiaSIM simulation model (32-bit NL5 version only) is available for the iW673. For more information and where to download, please visit the DiaSIM page.

Features

Digital adaptive turn-off control minimizes dead-time and eliminates the parallel Schottky diode

Integrated pulse linear regulator (PLR) allows SR operation at low system output voltage down to 2.4V in typical 5V, 2.5A USB charger applications

Wide input operating voltage up to 30V

Optimized 5V MOSFET gate driver

Intelligent low power management achieves ultra-low no-load operating current < 0.65mA

Lossless MOSFET VDS sensing for SR timing control

6-pin SOT23 package

Applications

Compact AC/DC adapters/chargers for media tablets and smart phones

     Model Available!

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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

To order a sample of any of our products, please complete the following form. We will provide up to five parts free of charge. Our sales department will provide pricing for samples orders exceeding five parts.

Sample Request Form

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Important note: Dialog's DiaSIM models are only compatible with the 32-bit version of NL5.

Product Briefs and Summaries
Name Date Version
iW673 Product Summary (522.11 KB) 30/12/2021 1.6
Datasheets
Name Date Version
iW673 Datasheet (1.11 MB) (Registered users only) 30/12/2021 1.7
Brochures
Name Date Version
Power Conversion Products Selector Guide – English (4.22 MB) 01/12/2019 1.0
Power Conversion Products Selector Guide – Simplified Chinese (4.21 MB) 01/12/2019 1.0
DiaSIM Simulation Tools
Name Date Version
iW673 DiaSIM™ Model (66.88 KB) (Registered users only) 02/08/2018 3.0
NL5 Quick Start Guide (4.13 MB)
Reference designs
Name Date Version
Reference Design EBC10104: iW1699B-05 and iW673-00 for 5V/2.4A Adapter Design (2.44 MB) (Registered users only) 23/06/2016 1.0
Reference Design EBC10106: iW1602-00 and iW600-00 and iW673-00 5V/2A High Performance Charger Design (2.76 MB) (Registered users only) 17/06/2016 1.0
Reference Design EBC10107: iW1602-00 and iW600-00 and iW673-00 5V/3A Small Size Charger Design (2.9 MB) (Registered users only) 17/06/2016 1.0
Reference Design EBC10110: iW1782-01, iW636-00 and iW673-20 18W, 5V/3A,9V/2A,12V/1.5A QC3.0 High Efficiency Design (4.81 MB) (Registered users only) 20/02/2018 1.0
Reference Design EBC10111: iW1782-01, iW636-02 and iW673-20 21W, 5V/3A,9V/2.3A,12V/1.7A QC3.0 High Efficiency Design (5.01 MB) (Registered users only) 20/02/2018 1.0
Reference Design EBC10112: iW1782-01, iW636-01 and iW673-20 24W, 5V/3A,9V/2.7A,12V/2A QC3.0 High Efficiency Design (5.02 MB) (Registered users only) 20/02/2018 1.0
Reference Design EBC10113: iW1702-00 and iW673-20 for 20V/2.3A Slim Adapter Design with Synchronous Rectifier (4.76 MB) (Registered users only) 22/01/2022 2.0
Reference Design EBC10226: iW1820-31 and iW673-20 5V/3A Travel Adapter Design (2.38 MB) (Registered users only) 22/01/2022 2.0