iW1818-EVAL

Evaluation Board for 10W Single-Output

Switch-Mode Power Supply

Rev. 1.0

Evaluation Board Summary

© 2016 Dialog Semiconductor

www.dialog-semiconductor.com

1 of 6

18-May-2016

1 Description

The iW1818-EVAL evaluation board implements a 10W power supply based

on Dialog Semiconductor’s iW1818 AccuSwitch™ digital off-line power supply

controller IC. The evaluation board supplies a 5V, 2A regulated output voltage

using a primary-side controlled quasi-resonant flyback converter that meets

the U.S. Department of Energy’s most recent level VI efficiency standard and

the EU’s Code of Conduct, Version 5, Tier 2 standard for both active mode and

no-load standby power consumption.

The iW1818 controller integrates an 800V power BJT transistor to lower

the power supply BOM cost and uses Dialog’s advanced PrimAccurate™

digital control technology to eliminate the need for external secondary-side feedback components, further reducing

component count and cost, while improving reliability. It operates in quasi-resonant mode to improve efficiency and

performance with minimal external filtering. Proprietary control technology allows high efficiency across a broad range

of loads, which enables the iW1818 to meet stringent international standards for power supply efficiency.

2 Features

● Output voltage: 5V

● Output current: 2A

● Total output power: 10W max.

● Integrated 800V BJT

● Active mode efficiency > 80%

● Supports high capacitance loads up to 6,000mF

3 Applications

● Power Supplies for:

x

White Goods

x

Home Appliances

x

Industrial Control

x

Network Devices

a minimum of EMI filtering components

● Quasi-resonant operation

● Low component count and small PCB footprint

● iW1818 IC protections:

x

Output short-circuit, over-current, over-voltage

x

Input voltage protection: brown-out, brown-in,

unplug

x

Over-temperature protection - internal sensor