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iW1762
PrimAccurate™ High-Performance N-Channel MOSFET Digital PWM Controller for Networking Adapters
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
Typical applications diagram
Functional block diagram
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