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


64kHz integrated BJT optimized for 5Vout, 5W output

The iW1812 is a high performance AC/DC converter with an integrated 800V power Bipolar Junction Transistor (BJT).  Capable of 5W output power, the iW1812 operates in a quasi-resonant mode to optimize efficiency and it also incorporates a low-power mode that enables less than 30mW of power consumption at no load, meeting global energy efficiency standards, making it ideal for applications such as energy standard compliant home appliances.

The iW1812 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


AccuSwitch™ - Integrated 800V BJT

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

Ultra-Low 1.7uA Start-Up Current

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

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


Smart Meters

Motor Control

Industrial Power Supplies

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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Name Date Version
iW1812 Datasheet (816.78 KB) 26/09/2016 1.2
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