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iW1762

PrimAccurate™ High-Performance N-Channel MOSFET Digital PWM Controller for Networking Adapters

iw1762typicalapplicationsdiagram.jpg

Selectable cable drop compensation

The iW1762 is a high performance AC/DC controller designed to drive an external power N-channel MOSFET for peak current mode PWM flyback power supplies. Optimized for power supplies with output power between 15W- 24W, the iW1762 is ideal for power adapters in networking equipment and monitors.

The iW1762 easily meets the US DoE’s external power supply standard and the EU’s Code of Conduct, version 5, tier 2 standard, with no-load power consumption less than 20mW while complying with active mode efficiency requirements. As a PrimAccurate™ controller the iW1762 does not need any direct secondary-side feedback components, eliminating the need for optocouplers, reducing component count and solution cost. Additional features include Dialog's proprietary EZ-EMI™ technology, adaptive multi-mode PWM/PFM control for optimal efficiency across all loads, 5 selectable cable and connector voltage drop compensation voltages, robust operation with full protection from over-voltage and over-temperature.

For information on the iW1762 Ultrabook™ solution, see the reference designs page.

Lifecycle status

● Active

Features

Meets Proposed Mandatory Federal Efficiency Standards for External Power Supplies1

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

  • Less than 50mW No-Load Power Consumption

Active Start-Up Reduces Turn-on Time without Impacting No-load Power Consumption

Optimized for an Output Power Range of 15W to 24W

Ultra-low 300uA Operating Current at No-Load

79kHz PWM Switching Frequency

Selectable Voltage Offset Compensation for Voltage Loss in Cables and Connectors (5 Options)

  • Selectable via single resistor to ground

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

Intrinsically Low Noise Solution - No Audible Noise Over Entire Operating Range

Adaptive Multi-Mode PWM/PFM Control for Optimal Efficiency Across Load Range

EZ-EMI™ Design to Easily Meet Global EMI Specifications

Fast Dynamic Load Regulation

Fully Protected from Fault Conditions

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

Applications

Power Adaptors for Network Devices and Monitors

AC/DC Power Supplies in Home Electronics

Optimized for Universal Input Power Supplies (15W-24W)

Block Diagrams

iw1762typicalapplicationsdiagram.jpg

Typical applications diagram

iw1762functionalblockdiagram1.jpg

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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Product Briefs and Summaries
Name Date Version
iW1762 Product Brief (521.58 KB) 19/06/2012 0.6
White Papers & Technical Articles
Name Date Version
What is Digital Power White Paper (597.24 KB)