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AccuSwitch™ Off-Line Digital PWM Converter with 800V Bipolar Power Transistor


Optimized for 5W output power applications

Integrated with a highly accurate control circuit, the iW1816 operates in a quasi-resonant mode allowing it to easily meet global energy efficiency standards, with less than 30mW of no-load power consumption.

The iW1816 includes an adaptive soft-start circuit which intelligently controls start-up over a range of output voltages from 5V to 12V and higher, and into capacitive loads up to 6000uF, making it ideal for applications such as smart meters, home appliances, and networking equipment. The iW1816 also incorporates Dialog's PrimAccurate™ primary-side digital control algorithms that enable a fully isolated solution without the need for an optocoupler, reducing cost and solution size while greatly improving reliability.  Additional functionality includes full protection from over temperature, over voltage and over current conditions as well as EZ-EMI® design techniques to allow for a solution that easily meets global EMI specifications.

Lifecycle status

● Active


Meets Proposed Mandatory Federal Efficiency Standards for External Power Supplies1

AccuSwitch™ - Integrated 800V Power BJT

Adaptively Controlled Soft Start-up - Fast Yet Smooth Start-up Into Large Capacitive Loads

Optimized for 5W Output Power Range Capable

Easily Meets Energy-Star® AC-DC Power Supply Efficiency Specs (Rev 2.0)

  • Less than 30mW No-Load Power Consumption

PrimAccurate™ - Primary-Side Control, No Opto-Coupler Needed

Quasi-resonant Control for Optimal Efficiency

EZ-EMI™ Design to Easily Meet Global EMI Specifications

64kHz PWM Switching Frequency

Fully Protected from Fault Conditions:

  • Over-Temperature Protection
  • Output Over-Voltage and Over-Current
  • Sense-Resistor Short Circuit Protection


Smart Meters

Motor Control

Networking Devices

Home Automation and Appliances

Block Diagrams


Typical applications diagram


Functional block diagram

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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Inquiries Distributors and Representatives Register for newsletters
Name Date Version
iW1816 Datasheet (858.15 KB) 30/06/2016 1.0
Reference designs
Name Date Version
Reference Design EBC10035: iW1816-20 12V/250mA 5V/250mA Dual-Output Home Appliance Design (1.46 MB) (Registered users only) 22/12/2021 2.0
Reference Design EBC10036: iW1816-20 12V/200mA Single-Output Home Appliance Design (1.47 MB) (Registered users only) 24/12/2021 2.0
White Papers & Technical Articles
Name Date Version
What is Digital Power White Paper (597.24 KB)
White Goods Power Supply Design White Paper (921.42 KB) (Registered users only) 01/05/2016 1.0