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See Technical Specifications

IW1677-00 +BOM

Low-power offline digital green-mode PWM controller

Manufacturer:

Renesas
Mfr.Part #:

IW1677-00
Datasheet:

IW1677-00 Datasheet (PDF)
Pkg. Type:

SOT23-6L
Carrier Type:

Tape & Reel
EDA/CAD Models:

Request Free CAD Models for IW1677-00

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

IW1677-00 General Description

The iW1677 is a high-performance AC/DC controller designed to drive a low-cost bipolar junction transistor (BJT) power switch in peak current mode PWM flyback power supplies up to 5W. Ideal for power adapters for smartphones, the iW1677 integrates Renesas' PrimAccurate™ digital primary-side control, eliminating the need for the secondary-side optocoupler, and reducing component count and solution cost.

The iW1677 integrates an active start-up circuit that allows for fast turn-on without impacting operating current consumption. The device 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. Additional features include Renesas' proprietary EZ-EMI™ technology, quasi-resonant control for optimal efficiency at heavy loads, cable and connector voltage drop compensation options, full protection from fault conditions, and tiny packaging.

Key Features

Meets proposed mandatory federal efficiency standards for external power supplies
Intrinsically low noise solution - No audible noise over entire operating range
Easily meets Energy Star^® AC/DC power supply efficiency specs (Rev. 2.0)
- Less than 20mW no-load power consumption
Low 1.7µA start-up current
Active start-up circuit to reduce turn-on time
72kHz PWM switching frequency
Voltage offset compensation for voltage loss in cables and connectors (4 options)
PrimAccurate™ - Primary-side control, no optocoupler needed
Quasi-resonant control for optimal efficiency
EZ-EMI™ design to easily meet global EMI specifications
Fast dynamic load regulation
Fully protected from fault conditions
- Over-temperature protection
- Output overvoltage and overcurrent
- Input undervoltage protection
- Sense-resistor short circuit protection